ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/jsr166/jsr166/src/test/tck/CompletableFutureTest.java
(Generate patch)

Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.47 by jsr166, Mon Jun 2 18:21:34 2014 UTC vs.
Revision 1.187 by jsr166, Mon Jul 3 21:18:37 2017 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
10 import java.util.concurrent.Executor;
11 import java.util.concurrent.ExecutorService;
12 import java.util.concurrent.Executors;
25   import java.util.concurrent.CancellationException;
14 import java.util.concurrent.CountDownLatch;
15 import java.util.concurrent.ExecutionException;
16 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27   import java.util.concurrent.CompletionException;
28   import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31 + import java.util.concurrent.ForkJoinPool;
32 + import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
23 < import static java.util.concurrent.TimeUnit.SECONDS;
24 < import java.util.*;
25 < import java.util.function.Supplier;
26 < import java.util.function.Consumer;
36 > import java.util.concurrent.atomic.AtomicReference;
37   import java.util.function.BiConsumer;
28 import java.util.function.Function;
38   import java.util.function.BiFunction;
39 + import java.util.function.Consumer;
40 + import java.util.function.Function;
41 + import java.util.function.Predicate;
42 + import java.util.function.Supplier;
43 +
44 + import junit.framework.AssertionFailedError;
45 + import junit.framework.Test;
46 + import junit.framework.TestSuite;
47  
48   public class CompletableFutureTest extends JSR166TestCase {
49  
50      public static void main(String[] args) {
51 <        junit.textui.TestRunner.run(suite());
51 >        main(suite(), args);
52      }
53      public static Test suite() {
54          return new TestSuite(CompletableFutureTest.class);
# Line 42 | Line 59 | public class CompletableFutureTest exten
59      void checkIncomplete(CompletableFuture<?> f) {
60          assertFalse(f.isDone());
61          assertFalse(f.isCancelled());
62 <        assertTrue(f.toString().contains("[Not completed]"));
62 >        assertTrue(f.toString().contains("Not completed"));
63          try {
64              assertNull(f.getNow(null));
65          } catch (Throwable fail) { threadUnexpectedException(fail); }
66          try {
67 <            f.get(0L, SECONDS);
67 >            f.get(randomExpiredTimeout(), randomTimeUnit());
68              shouldThrow();
69          }
70          catch (TimeoutException success) {}
# Line 55 | Line 72 | public class CompletableFutureTest exten
72      }
73  
74      <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
75 <        try {
76 <            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
60 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
75 >        checkTimedGet(f, value);
76 >
77          try {
78              assertEquals(value, f.join());
63        } catch (Throwable fail) { threadUnexpectedException(fail); }
64        try {
79              assertEquals(value, f.getNow(null));
66        } catch (Throwable fail) { threadUnexpectedException(fail); }
67        try {
80              assertEquals(value, f.get());
81          } catch (Throwable fail) { threadUnexpectedException(fail); }
82          assertTrue(f.isDone());
# Line 73 | Line 85 | public class CompletableFutureTest exten
85          assertTrue(f.toString().contains("[Completed normally]"));
86      }
87  
88 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
89 <        try {
90 <            f.get(LONG_DELAY_MS, MILLISECONDS);
91 <            shouldThrow();
92 <        } catch (ExecutionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
94 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
95 <        try {
96 <            f.join();
97 <            shouldThrow();
98 <        } catch (CompletionException success) {
99 <            assertTrue(success.getCause() instanceof CFException);
100 <        }
101 <        try {
102 <            f.getNow(null);
103 <            shouldThrow();
104 <        } catch (CompletionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
88 >    /**
89 >     * Returns the "raw" internal exceptional completion of f,
90 >     * without any additional wrapping with CompletionException.
91 >     */
92 >    Throwable exceptionalCompletion(CompletableFuture<?> f) {
93 >        // handle (and whenComplete and exceptionally) can distinguish
94 >        // between "direct" and "wrapped" exceptional completion
95 >        return f.handle((u, t) -> t).join();
96 >    }
97 >
98 >    void checkCompletedExceptionally(CompletableFuture<?> f,
99 >                                     boolean wrapped,
100 >                                     Consumer<Throwable> checker) {
101 >        Throwable cause = exceptionalCompletion(f);
102 >        if (wrapped) {
103 >            assertTrue(cause instanceof CompletionException);
104 >            cause = cause.getCause();
105          }
106 <        try {
96 <            f.get();
97 <            shouldThrow();
98 <        } catch (ExecutionException success) {
99 <            assertTrue(success.getCause() instanceof CFException);
100 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
101 <        assertTrue(f.isDone());
102 <        assertFalse(f.isCancelled());
103 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
104 <    }
106 >        checker.accept(cause);
107  
108 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
107 <                                              CFException ex) {
108 >        long startTime = System.nanoTime();
109          try {
110              f.get(LONG_DELAY_MS, MILLISECONDS);
111              shouldThrow();
112          } catch (ExecutionException success) {
113 <            assertSame(ex, success.getCause());
113 >            assertSame(cause, success.getCause());
114          } catch (Throwable fail) { threadUnexpectedException(fail); }
115 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
116 +
117          try {
118              f.join();
119              shouldThrow();
120          } catch (CompletionException success) {
121 <            assertSame(ex, success.getCause());
122 <        }
121 >            assertSame(cause, success.getCause());
122 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
123 >
124          try {
125              f.getNow(null);
126              shouldThrow();
127          } catch (CompletionException success) {
128 <            assertSame(ex, success.getCause());
129 <        }
128 >            assertSame(cause, success.getCause());
129 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
130 >
131          try {
132              f.get();
133              shouldThrow();
134          } catch (ExecutionException success) {
135 <            assertSame(ex, success.getCause());
135 >            assertSame(cause, success.getCause());
136          } catch (Throwable fail) { threadUnexpectedException(fail); }
137 <        assertTrue(f.isDone());
137 >
138          assertFalse(f.isCancelled());
139 +        assertTrue(f.isDone());
140 +        assertTrue(f.isCompletedExceptionally());
141          assertTrue(f.toString().contains("[Completed exceptionally]"));
142      }
143  
144 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
145 +        checkCompletedExceptionally(f, true,
146 +            t -> assertTrue(t instanceof CFException));
147 +    }
148 +
149 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
150 +        checkCompletedExceptionally(f, true,
151 +            t -> assertTrue(t instanceof CancellationException));
152 +    }
153 +
154 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
155 +        checkCompletedExceptionally(f, false,
156 +            t -> assertTrue(t instanceof TimeoutException));
157 +    }
158 +
159 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
160 +                                            Throwable ex) {
161 +        checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
162 +    }
163 +
164 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
165 +        checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
166 +    }
167 +
168      void checkCancelled(CompletableFuture<?> f) {
169 +        long startTime = System.nanoTime();
170          try {
171              f.get(LONG_DELAY_MS, MILLISECONDS);
172              shouldThrow();
173          } catch (CancellationException success) {
174          } catch (Throwable fail) { threadUnexpectedException(fail); }
175 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
176 +
177          try {
178              f.join();
179              shouldThrow();
# Line 153 | Line 187 | public class CompletableFutureTest exten
187              shouldThrow();
188          } catch (CancellationException success) {
189          } catch (Throwable fail) { threadUnexpectedException(fail); }
156        assertTrue(f.isDone());
157        assertTrue(f.isCompletedExceptionally());
158        assertTrue(f.isCancelled());
159        assertTrue(f.toString().contains("[Completed exceptionally]"));
160    }
190  
191 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
192 <        try {
164 <            f.get(LONG_DELAY_MS, MILLISECONDS);
165 <            shouldThrow();
166 <        } catch (ExecutionException success) {
167 <            assertTrue(success.getCause() instanceof CancellationException);
168 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
169 <        try {
170 <            f.join();
171 <            shouldThrow();
172 <        } catch (CompletionException success) {
173 <            assertTrue(success.getCause() instanceof CancellationException);
174 <        }
175 <        try {
176 <            f.getNow(null);
177 <            shouldThrow();
178 <        } catch (CompletionException success) {
179 <            assertTrue(success.getCause() instanceof CancellationException);
180 <        }
181 <        try {
182 <            f.get();
183 <            shouldThrow();
184 <        } catch (ExecutionException success) {
185 <            assertTrue(success.getCause() instanceof CancellationException);
186 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
191 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
192 >
193          assertTrue(f.isDone());
188        assertFalse(f.isCancelled());
194          assertTrue(f.isCompletedExceptionally());
195 +        assertTrue(f.isCancelled());
196          assertTrue(f.toString().contains("[Completed exceptionally]"));
197      }
198  
# Line 204 | Line 210 | public class CompletableFutureTest exten
210       * isCancelled, join, get, and getNow
211       */
212      public void testComplete() {
213 +        for (Integer v1 : new Integer[] { 1, null })
214 +    {
215          CompletableFuture<Integer> f = new CompletableFuture<>();
216          checkIncomplete(f);
217 <        f.complete(one);
218 <        checkCompletedNormally(f, one);
219 <    }
217 >        assertTrue(f.complete(v1));
218 >        assertFalse(f.complete(v1));
219 >        checkCompletedNormally(f, v1);
220 >    }}
221  
222      /**
223       * completeExceptionally completes exceptionally, as indicated by
# Line 216 | Line 225 | public class CompletableFutureTest exten
225       */
226      public void testCompleteExceptionally() {
227          CompletableFuture<Integer> f = new CompletableFuture<>();
228 +        CFException ex = new CFException();
229          checkIncomplete(f);
230 <        f.completeExceptionally(new CFException());
231 <        checkCompletedWithWrappedCFException(f);
230 >        f.completeExceptionally(ex);
231 >        checkCompletedExceptionally(f, ex);
232      }
233  
234      /**
# Line 226 | Line 236 | public class CompletableFutureTest exten
236       * methods isDone, isCancelled, join, get, and getNow
237       */
238      public void testCancel() {
239 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
240 +    {
241          CompletableFuture<Integer> f = new CompletableFuture<>();
242          checkIncomplete(f);
243 <        assertTrue(f.cancel(true));
243 >        assertTrue(f.cancel(mayInterruptIfRunning));
244 >        assertTrue(f.cancel(mayInterruptIfRunning));
245 >        assertTrue(f.cancel(!mayInterruptIfRunning));
246          checkCancelled(f);
247 <    }
247 >    }}
248  
249      /**
250       * obtrudeValue forces completion with given value
# Line 238 | Line 252 | public class CompletableFutureTest exten
252      public void testObtrudeValue() {
253          CompletableFuture<Integer> f = new CompletableFuture<>();
254          checkIncomplete(f);
255 <        f.complete(one);
255 >        assertTrue(f.complete(one));
256          checkCompletedNormally(f, one);
257          f.obtrudeValue(three);
258          checkCompletedNormally(f, three);
# Line 259 | Line 273 | public class CompletableFutureTest exten
273       * obtrudeException forces completion with given exception
274       */
275      public void testObtrudeException() {
276 <        CompletableFuture<Integer> f = new CompletableFuture<>();
277 <        checkIncomplete(f);
278 <        f.complete(one);
279 <        checkCompletedNormally(f, one);
280 <        f.obtrudeException(new CFException());
281 <        checkCompletedWithWrappedCFException(f);
276 >        for (Integer v1 : new Integer[] { 1, null })
277 >    {
278 >        CFException ex;
279 >        CompletableFuture<Integer> f;
280 >
281 >        f = new CompletableFuture<>();
282 >        assertTrue(f.complete(v1));
283 >        for (int i = 0; i < 2; i++) {
284 >            f.obtrudeException(ex = new CFException());
285 >            checkCompletedExceptionally(f, ex);
286 >        }
287 >
288          f = new CompletableFuture<>();
289 <        f.obtrudeException(new CFException());
290 <        checkCompletedWithWrappedCFException(f);
289 >        for (int i = 0; i < 2; i++) {
290 >            f.obtrudeException(ex = new CFException());
291 >            checkCompletedExceptionally(f, ex);
292 >        }
293 >
294          f = new CompletableFuture<>();
295 +        f.completeExceptionally(ex = new CFException());
296 +        f.obtrudeValue(v1);
297 +        checkCompletedNormally(f, v1);
298 +        f.obtrudeException(ex = new CFException());
299 +        checkCompletedExceptionally(f, ex);
300          f.completeExceptionally(new CFException());
301 <        f.obtrudeValue(four);
302 <        checkCompletedNormally(f, four);
303 <        f.obtrudeException(new CFException());
304 <        checkCompletedWithWrappedCFException(f);
277 <    }
301 >        checkCompletedExceptionally(f, ex);
302 >        assertFalse(f.complete(v1));
303 >        checkCompletedExceptionally(f, ex);
304 >    }}
305  
306      /**
307       * getNumberOfDependents returns number of dependent tasks
308       */
309      public void testGetNumberOfDependents() {
310 +        for (ExecutionMode m : ExecutionMode.values())
311 +        for (Integer v1 : new Integer[] { 1, null })
312 +    {
313          CompletableFuture<Integer> f = new CompletableFuture<>();
314          assertEquals(0, f.getNumberOfDependents());
315 <        CompletableFuture g = f.thenRun(new Noop());
315 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
316          assertEquals(1, f.getNumberOfDependents());
317          assertEquals(0, g.getNumberOfDependents());
318 <        CompletableFuture h = f.thenRun(new Noop());
318 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
319          assertEquals(2, f.getNumberOfDependents());
320 <        f.complete(1);
320 >        assertEquals(0, h.getNumberOfDependents());
321 >        assertTrue(f.complete(v1));
322          checkCompletedNormally(g, null);
323 +        checkCompletedNormally(h, null);
324          assertEquals(0, f.getNumberOfDependents());
325          assertEquals(0, g.getNumberOfDependents());
326 <    }
326 >        assertEquals(0, h.getNumberOfDependents());
327 >    }}
328  
329      /**
330       * toString indicates current completion state
# Line 302 | Line 335 | public class CompletableFutureTest exten
335          f = new CompletableFuture<String>();
336          assertTrue(f.toString().contains("[Not completed]"));
337  
338 <        f.complete("foo");
338 >        assertTrue(f.complete("foo"));
339          assertTrue(f.toString().contains("[Completed normally]"));
340  
341          f = new CompletableFuture<String>();
342 <        f.completeExceptionally(new IndexOutOfBoundsException());
342 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
343          assertTrue(f.toString().contains("[Completed exceptionally]"));
344 +
345 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
346 +            f = new CompletableFuture<String>();
347 +            assertTrue(f.cancel(mayInterruptIfRunning));
348 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
349 +        }
350      }
351  
352      /**
# Line 318 | Line 357 | public class CompletableFutureTest exten
357          checkCompletedNormally(f, "test");
358      }
359  
360 <    // Choose non-commutative actions for better coverage
360 >    abstract static class CheckedAction {
361 >        int invocationCount = 0;
362 >        final ExecutionMode m;
363 >        CheckedAction(ExecutionMode m) { this.m = m; }
364 >        void invoked() {
365 >            m.checkExecutionMode();
366 >            assertEquals(0, invocationCount++);
367 >        }
368 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
369 >        void assertInvoked() { assertEquals(1, invocationCount); }
370 >    }
371  
372 <    // A non-commutative function that handles and produces null values as well.
373 <    static Integer subtract(Integer x, Integer y) {
374 <        return (x == null && y == null) ? null :
375 <            ((x == null) ? 42 : x.intValue())
376 <            - ((y == null) ? 99 : y.intValue());
372 >    abstract static class CheckedIntegerAction extends CheckedAction {
373 >        Integer value;
374 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
375 >        void assertValue(Integer expected) {
376 >            assertInvoked();
377 >            assertEquals(expected, value);
378 >        }
379 >    }
380 >
381 >    static class IntegerSupplier extends CheckedAction
382 >        implements Supplier<Integer>
383 >    {
384 >        final Integer value;
385 >        IntegerSupplier(ExecutionMode m, Integer value) {
386 >            super(m);
387 >            this.value = value;
388 >        }
389 >        public Integer get() {
390 >            invoked();
391 >            return value;
392 >        }
393      }
394  
395      // A function that handles and produces null values as well.
# Line 332 | Line 397 | public class CompletableFutureTest exten
397          return (x == null) ? null : x + 1;
398      }
399  
400 <    static final Supplier<Integer> supplyOne =
401 <        () -> Integer.valueOf(1);
402 <    static final Function<Integer, Integer> inc =
403 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
339 <    static final BiFunction<Integer, Integer, Integer> subtract =
340 <        (Integer x, Integer y) -> subtract(x, y);
341 <    static final class IncAction implements Consumer<Integer> {
342 <        int invocationCount = 0;
343 <        Integer value;
400 >    static class NoopConsumer extends CheckedIntegerAction
401 >        implements Consumer<Integer>
402 >    {
403 >        NoopConsumer(ExecutionMode m) { super(m); }
404          public void accept(Integer x) {
405 <            invocationCount++;
406 <            value = inc(x);
405 >            invoked();
406 >            value = x;
407          }
408      }
409 <    static final class IncFunction implements Function<Integer,Integer> {
410 <        int invocationCount = 0;
411 <        Integer value;
409 >
410 >    static class IncFunction extends CheckedIntegerAction
411 >        implements Function<Integer,Integer>
412 >    {
413 >        IncFunction(ExecutionMode m) { super(m); }
414          public Integer apply(Integer x) {
415 <            invocationCount++;
415 >            invoked();
416              return value = inc(x);
417          }
418      }
419 <    static final class SubtractAction implements BiConsumer<Integer, Integer> {
420 <        int invocationCount = 0;
421 <        Integer value;
422 <        // Check this action was invoked exactly once when result is computed.
419 >
420 >    // Choose non-commutative actions for better coverage
421 >    // A non-commutative function that handles and produces null values as well.
422 >    static Integer subtract(Integer x, Integer y) {
423 >        return (x == null && y == null) ? null :
424 >            ((x == null) ? 42 : x.intValue())
425 >            - ((y == null) ? 99 : y.intValue());
426 >    }
427 >
428 >    static class SubtractAction extends CheckedIntegerAction
429 >        implements BiConsumer<Integer, Integer>
430 >    {
431 >        SubtractAction(ExecutionMode m) { super(m); }
432          public void accept(Integer x, Integer y) {
433 <            invocationCount++;
433 >            invoked();
434              value = subtract(x, y);
435          }
436      }
437 <    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
438 <        int invocationCount = 0;
439 <        Integer value;
440 <        // Check this action was invoked exactly once when result is computed.
437 >
438 >    static class SubtractFunction extends CheckedIntegerAction
439 >        implements BiFunction<Integer, Integer, Integer>
440 >    {
441 >        SubtractFunction(ExecutionMode m) { super(m); }
442          public Integer apply(Integer x, Integer y) {
443 <            invocationCount++;
443 >            invoked();
444              return value = subtract(x, y);
445          }
446      }
447 <    static final class Noop implements Runnable {
448 <        int invocationCount = 0;
447 >
448 >    static class Noop extends CheckedAction implements Runnable {
449 >        Noop(ExecutionMode m) { super(m); }
450          public void run() {
451 <            invocationCount++;
451 >            invoked();
452          }
453      }
454  
455 <    static final class FailingSupplier implements Supplier<Integer> {
456 <        int invocationCount = 0;
455 >    static class FailingSupplier extends CheckedAction
456 >        implements Supplier<Integer>
457 >    {
458 >        final CFException ex;
459 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
460          public Integer get() {
461 <            invocationCount++;
462 <            throw new CFException();
461 >            invoked();
462 >            throw ex;
463          }
464      }
465 <    static final class FailingConsumer implements Consumer<Integer> {
466 <        int invocationCount = 0;
465 >
466 >    static class FailingConsumer extends CheckedIntegerAction
467 >        implements Consumer<Integer>
468 >    {
469 >        final CFException ex;
470 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
471          public void accept(Integer x) {
472 <            invocationCount++;
473 <            throw new CFException();
472 >            invoked();
473 >            value = x;
474 >            throw ex;
475          }
476      }
477 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
478 <        int invocationCount = 0;
477 >
478 >    static class FailingBiConsumer extends CheckedIntegerAction
479 >        implements BiConsumer<Integer, Integer>
480 >    {
481 >        final CFException ex;
482 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
483          public void accept(Integer x, Integer y) {
484 <            invocationCount++;
485 <            throw new CFException();
484 >            invoked();
485 >            value = subtract(x, y);
486 >            throw ex;
487          }
488      }
489 <    static final class FailingFunction implements Function<Integer, Integer> {
490 <        int invocationCount = 0;
489 >
490 >    static class FailingFunction extends CheckedIntegerAction
491 >        implements Function<Integer, Integer>
492 >    {
493 >        final CFException ex;
494 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
495          public Integer apply(Integer x) {
496 <            invocationCount++;
497 <            throw new CFException();
496 >            invoked();
497 >            value = x;
498 >            throw ex;
499          }
500      }
501 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
502 <        int invocationCount = 0;
501 >
502 >    static class FailingBiFunction extends CheckedIntegerAction
503 >        implements BiFunction<Integer, Integer, Integer>
504 >    {
505 >        final CFException ex;
506 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
507          public Integer apply(Integer x, Integer y) {
508 <            invocationCount++;
509 <            throw new CFException();
508 >            invoked();
509 >            value = subtract(x, y);
510 >            throw ex;
511          }
512      }
513 <    static final class FailingNoop implements Runnable {
514 <        int invocationCount = 0;
513 >
514 >    static class FailingRunnable extends CheckedAction implements Runnable {
515 >        final CFException ex;
516 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
517          public void run() {
518 <            invocationCount++;
519 <            throw new CFException();
518 >            invoked();
519 >            throw ex;
520          }
521      }
522  
523 <    static final class CompletableFutureInc
524 <        implements Function<Integer, CompletableFuture<Integer>> {
525 <        int invocationCount = 0;
523 >    static class CompletableFutureInc extends CheckedIntegerAction
524 >        implements Function<Integer, CompletableFuture<Integer>>
525 >    {
526 >        CompletableFutureInc(ExecutionMode m) { super(m); }
527          public CompletableFuture<Integer> apply(Integer x) {
528 <            invocationCount++;
528 >            invoked();
529 >            value = x;
530              CompletableFuture<Integer> f = new CompletableFuture<>();
531 <            f.complete(inc(x));
531 >            assertTrue(f.complete(inc(x)));
532              return f;
533          }
534      }
535  
536 <    static final class FailingCompletableFutureFunction
537 <        implements Function<Integer, CompletableFuture<Integer>> {
538 <        int invocationCount = 0;
536 >    static class FailingCompletableFutureFunction extends CheckedIntegerAction
537 >        implements Function<Integer, CompletableFuture<Integer>>
538 >    {
539 >        final CFException ex;
540 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
541          public CompletableFuture<Integer> apply(Integer x) {
542 <            invocationCount++;
543 <            throw new CFException();
542 >            invoked();
543 >            value = x;
544 >            throw ex;
545 >        }
546 >    }
547 >
548 >    static class CountingRejectingExecutor implements Executor {
549 >        final RejectedExecutionException ex = new RejectedExecutionException();
550 >        final AtomicInteger count = new AtomicInteger(0);
551 >        public void execute(Runnable r) {
552 >            count.getAndIncrement();
553 >            throw ex;
554          }
555      }
556  
557      // Used for explicit executor tests
558      static final class ThreadExecutor implements Executor {
559 <        AtomicInteger count = new AtomicInteger(0);
559 >        final AtomicInteger count = new AtomicInteger(0);
560 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
561 >        static boolean startedCurrentThread() {
562 >            return Thread.currentThread().getThreadGroup() == tg;
563 >        }
564  
565          public void execute(Runnable r) {
566              count.getAndIncrement();
567 <            new Thread(r).start();
567 >            new Thread(tg, r).start();
568          }
569      }
570  
571 +    static final boolean defaultExecutorIsCommonPool
572 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
573 +
574      /**
575       * Permits the testing of parallel code for the 3 different
576 <     * execution modes without repeating all the testing code.
576 >     * execution modes without copy/pasting all the test methods.
577       */
578      enum ExecutionMode {
579 <        DEFAULT {
579 >        SYNC {
580 >            public void checkExecutionMode() {
581 >                assertFalse(ThreadExecutor.startedCurrentThread());
582 >                assertNull(ForkJoinTask.getPool());
583 >            }
584 >            public CompletableFuture<Void> runAsync(Runnable a) {
585 >                throw new UnsupportedOperationException();
586 >            }
587 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
588 >                throw new UnsupportedOperationException();
589 >            }
590              public <T> CompletableFuture<Void> thenRun
591                  (CompletableFuture<T> f, Runnable a) {
592                  return f.thenRun(a);
# Line 521 | Line 650 | public class CompletableFutureTest exten
650              }
651          },
652  
653 <        DEFAULT_ASYNC {
653 >        ASYNC {
654 >            public void checkExecutionMode() {
655 >                assertEquals(defaultExecutorIsCommonPool,
656 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
657 >            }
658 >            public CompletableFuture<Void> runAsync(Runnable a) {
659 >                return CompletableFuture.runAsync(a);
660 >            }
661 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
662 >                return CompletableFuture.supplyAsync(a);
663 >            }
664              public <T> CompletableFuture<Void> thenRun
665                  (CompletableFuture<T> f, Runnable a) {
666                  return f.thenRunAsync(a);
# Line 586 | Line 725 | public class CompletableFutureTest exten
725          },
726  
727          EXECUTOR {
728 +            public void checkExecutionMode() {
729 +                assertTrue(ThreadExecutor.startedCurrentThread());
730 +            }
731 +            public CompletableFuture<Void> runAsync(Runnable a) {
732 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
733 +            }
734 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
735 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
736 +            }
737              public <T> CompletableFuture<Void> thenRun
738                  (CompletableFuture<T> f, Runnable a) {
739                  return f.thenRunAsync(a, new ThreadExecutor());
# Line 649 | Line 797 | public class CompletableFutureTest exten
797              }
798          };
799  
800 +        public abstract void checkExecutionMode();
801 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
802 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
803          public abstract <T> CompletableFuture<Void> thenRun
804              (CompletableFuture<T> f, Runnable a);
805          public abstract <T> CompletableFuture<Void> thenAccept
# Line 698 | Line 849 | public class CompletableFutureTest exten
849      {
850          final AtomicInteger a = new AtomicInteger(0);
851          final CompletableFuture<Integer> f = new CompletableFuture<>();
852 <        if (!createIncomplete) f.complete(v1);
852 >        if (!createIncomplete) assertTrue(f.complete(v1));
853          final CompletableFuture<Integer> g = f.exceptionally
854              ((Throwable t) -> {
704                // Should not be called
855                  a.getAndIncrement();
856 <                throw new AssertionError();
856 >                threadFail("should not be called");
857 >                return null;            // unreached
858              });
859 <        if (createIncomplete) f.complete(v1);
859 >        if (createIncomplete) assertTrue(f.complete(v1));
860  
861          checkCompletedNormally(g, v1);
862          checkCompletedNormally(f, v1);
863          assertEquals(0, a.get());
864      }}
865  
715
866      /**
867       * exceptionally action completes with function value on source
868       * exception
# Line 727 | Line 877 | public class CompletableFutureTest exten
877          if (!createIncomplete) f.completeExceptionally(ex);
878          final CompletableFuture<Integer> g = f.exceptionally
879              ((Throwable t) -> {
880 +                ExecutionMode.SYNC.checkExecutionMode();
881                  threadAssertSame(t, ex);
882                  a.getAndIncrement();
883                  return v1;
# Line 737 | Line 888 | public class CompletableFutureTest exten
888          assertEquals(1, a.get());
889      }}
890  
891 +    /**
892 +     * If an "exceptionally action" throws an exception, it completes
893 +     * exceptionally with that exception
894 +     */
895      public void testExceptionally_exceptionalCompletionActionFailed() {
896          for (boolean createIncomplete : new boolean[] { true, false })
742        for (Integer v1 : new Integer[] { 1, null })
897      {
898          final AtomicInteger a = new AtomicInteger(0);
899          final CFException ex1 = new CFException();
# Line 748 | Line 902 | public class CompletableFutureTest exten
902          if (!createIncomplete) f.completeExceptionally(ex1);
903          final CompletableFuture<Integer> g = f.exceptionally
904              ((Throwable t) -> {
905 +                ExecutionMode.SYNC.checkExecutionMode();
906                  threadAssertSame(t, ex1);
907                  a.getAndIncrement();
908                  throw ex2;
909              });
910          if (createIncomplete) f.completeExceptionally(ex1);
911  
912 <        checkCompletedWithWrappedCFException(g, ex2);
912 >        checkCompletedWithWrappedException(g, ex2);
913 >        checkCompletedExceptionally(f, ex1);
914          assertEquals(1, a.get());
915      }}
916  
917      /**
918 <     * handle action completes normally with function value on normal
919 <     * completion of source
918 >     * whenComplete action executes on normal completion, propagating
919 >     * source result.
920       */
921 <    public void testHandle_normalCompletion() {
921 >    public void testWhenComplete_normalCompletion() {
922          for (ExecutionMode m : ExecutionMode.values())
923          for (boolean createIncomplete : new boolean[] { true, false })
924          for (Integer v1 : new Integer[] { 1, null })
925      {
770        final CompletableFuture<Integer> f = new CompletableFuture<>();
926          final AtomicInteger a = new AtomicInteger(0);
927 <        if (!createIncomplete) f.complete(v1);
928 <        final CompletableFuture<Integer> g = m.handle
927 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
928 >        if (!createIncomplete) assertTrue(f.complete(v1));
929 >        final CompletableFuture<Integer> g = m.whenComplete
930              (f,
931 <             (Integer x, Throwable t) -> {
932 <                threadAssertSame(x, v1);
931 >             (Integer result, Throwable t) -> {
932 >                m.checkExecutionMode();
933 >                threadAssertSame(result, v1);
934                  threadAssertNull(t);
935                  a.getAndIncrement();
779                return inc(v1);
936              });
937 <        if (createIncomplete) f.complete(v1);
937 >        if (createIncomplete) assertTrue(f.complete(v1));
938  
939 <        checkCompletedNormally(g, inc(v1));
939 >        checkCompletedNormally(g, v1);
940          checkCompletedNormally(f, v1);
941          assertEquals(1, a.get());
942      }}
943  
944      /**
945 <     * handle action completes normally with function value on
946 <     * exceptional completion of source
945 >     * whenComplete action executes on exceptional completion, propagating
946 >     * source result.
947       */
948 <    public void testHandle_exceptionalCompletion() {
948 >    public void testWhenComplete_exceptionalCompletion() {
949          for (ExecutionMode m : ExecutionMode.values())
950          for (boolean createIncomplete : new boolean[] { true, false })
795        for (Integer v1 : new Integer[] { 1, null })
951      {
797        final CompletableFuture<Integer> f = new CompletableFuture<>();
952          final AtomicInteger a = new AtomicInteger(0);
953          final CFException ex = new CFException();
954 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
955          if (!createIncomplete) f.completeExceptionally(ex);
956 <        final CompletableFuture<Integer> g = m.handle
956 >        final CompletableFuture<Integer> g = m.whenComplete
957              (f,
958 <             (Integer x, Throwable t) -> {
959 <                threadAssertNull(x);
958 >             (Integer result, Throwable t) -> {
959 >                m.checkExecutionMode();
960 >                threadAssertNull(result);
961                  threadAssertSame(t, ex);
962                  a.getAndIncrement();
807                return v1;
963              });
964          if (createIncomplete) f.completeExceptionally(ex);
965  
966 <        checkCompletedNormally(g, v1);
967 <        checkCompletedWithWrappedCFException(f, ex);
966 >        checkCompletedWithWrappedException(g, ex);
967 >        checkCompletedExceptionally(f, ex);
968          assertEquals(1, a.get());
969      }}
970  
971      /**
972 <     * handle action completes normally with function value on
973 <     * cancelled source
972 >     * whenComplete action executes on cancelled source, propagating
973 >     * CancellationException.
974       */
975 <    public void testHandle_sourceCancelled() {
975 >    public void testWhenComplete_sourceCancelled() {
976          for (ExecutionMode m : ExecutionMode.values())
977          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
978          for (boolean createIncomplete : new boolean[] { true, false })
824        for (Integer v1 : new Integer[] { 1, null })
979      {
826        final CompletableFuture<Integer> f = new CompletableFuture<>();
980          final AtomicInteger a = new AtomicInteger(0);
981 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
982          if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
983 <        final CompletableFuture<Integer> g = m.handle
983 >        final CompletableFuture<Integer> g = m.whenComplete
984              (f,
985 <             (Integer x, Throwable t) -> {
986 <                threadAssertNull(x);
985 >             (Integer result, Throwable t) -> {
986 >                m.checkExecutionMode();
987 >                threadAssertNull(result);
988                  threadAssertTrue(t instanceof CancellationException);
989                  a.getAndIncrement();
835                return v1;
990              });
991          if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
992  
993 <        checkCompletedNormally(g, v1);
993 >        checkCompletedWithWrappedCancellationException(g);
994          checkCancelled(f);
995          assertEquals(1, a.get());
996      }}
997  
998      /**
999 <     * handle result completes exceptionally if action does
999 >     * If a whenComplete action throws an exception when triggered by
1000 >     * a normal completion, it completes exceptionally
1001       */
1002 <    public void testHandle_sourceFailedActionFailed() {
848 <        for (ExecutionMode m : ExecutionMode.values())
1002 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1003          for (boolean createIncomplete : new boolean[] { true, false })
1004 +        for (ExecutionMode m : ExecutionMode.values())
1005 +        for (Integer v1 : new Integer[] { 1, null })
1006      {
1007 +        final AtomicInteger a = new AtomicInteger(0);
1008 +        final CFException ex = new CFException();
1009          final CompletableFuture<Integer> f = new CompletableFuture<>();
1010 +        if (!createIncomplete) assertTrue(f.complete(v1));
1011 +        final CompletableFuture<Integer> g = m.whenComplete
1012 +            (f,
1013 +             (Integer result, Throwable t) -> {
1014 +                m.checkExecutionMode();
1015 +                threadAssertSame(result, v1);
1016 +                threadAssertNull(t);
1017 +                a.getAndIncrement();
1018 +                throw ex;
1019 +            });
1020 +        if (createIncomplete) assertTrue(f.complete(v1));
1021 +
1022 +        checkCompletedWithWrappedException(g, ex);
1023 +        checkCompletedNormally(f, v1);
1024 +        assertEquals(1, a.get());
1025 +    }}
1026 +
1027 +    /**
1028 +     * If a whenComplete action throws an exception when triggered by
1029 +     * a source completion that also throws an exception, the source
1030 +     * exception takes precedence (unlike handle)
1031 +     */
1032 +    public void testWhenComplete_sourceFailedActionFailed() {
1033 +        for (boolean createIncomplete : new boolean[] { true, false })
1034 +        for (ExecutionMode m : ExecutionMode.values())
1035 +    {
1036          final AtomicInteger a = new AtomicInteger(0);
1037          final CFException ex1 = new CFException();
1038          final CFException ex2 = new CFException();
1039 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1040 +
1041          if (!createIncomplete) f.completeExceptionally(ex1);
1042 <        final CompletableFuture<Integer> g = m.handle
1042 >        final CompletableFuture<Integer> g = m.whenComplete
1043              (f,
1044 <             (Integer x, Throwable t) -> {
1045 <                threadAssertNull(x);
1046 <                threadAssertSame(ex1, t);
1044 >             (Integer result, Throwable t) -> {
1045 >                m.checkExecutionMode();
1046 >                threadAssertSame(t, ex1);
1047 >                threadAssertNull(result);
1048                  a.getAndIncrement();
1049                  throw ex2;
1050              });
1051          if (createIncomplete) f.completeExceptionally(ex1);
1052  
1053 <        checkCompletedWithWrappedCFException(g, ex2);
1054 <        checkCompletedWithWrappedCFException(f, ex1);
1053 >        checkCompletedWithWrappedException(g, ex1);
1054 >        checkCompletedExceptionally(f, ex1);
1055 >        if (testImplementationDetails) {
1056 >            assertEquals(1, ex1.getSuppressed().length);
1057 >            assertSame(ex2, ex1.getSuppressed()[0]);
1058 >        }
1059          assertEquals(1, a.get());
1060      }}
1061  
1062 <    public void testHandle_sourceCompletedNormallyActionFailed() {
1062 >    /**
1063 >     * handle action completes normally with function value on normal
1064 >     * completion of source
1065 >     */
1066 >    public void testHandle_normalCompletion() {
1067          for (ExecutionMode m : ExecutionMode.values())
1068          for (boolean createIncomplete : new boolean[] { true, false })
1069          for (Integer v1 : new Integer[] { 1, null })
1070      {
1071          final CompletableFuture<Integer> f = new CompletableFuture<>();
1072          final AtomicInteger a = new AtomicInteger(0);
1073 <        final CFException ex = new CFException();
879 <        if (!createIncomplete) f.complete(v1);
1073 >        if (!createIncomplete) assertTrue(f.complete(v1));
1074          final CompletableFuture<Integer> g = m.handle
1075              (f,
1076 <             (Integer x, Throwable t) -> {
1077 <                threadAssertSame(x, v1);
1076 >             (Integer result, Throwable t) -> {
1077 >                m.checkExecutionMode();
1078 >                threadAssertSame(result, v1);
1079                  threadAssertNull(t);
1080                  a.getAndIncrement();
1081 <                throw ex;
1081 >                return inc(v1);
1082              });
1083 <        if (createIncomplete) f.complete(v1);
1083 >        if (createIncomplete) assertTrue(f.complete(v1));
1084  
1085 <        checkCompletedWithWrappedCFException(g, ex);
1085 >        checkCompletedNormally(g, inc(v1));
1086          checkCompletedNormally(f, v1);
1087          assertEquals(1, a.get());
1088      }}
1089  
1090      /**
1091 <     * runAsync completes after running Runnable
1092 <     */
898 <    public void testRunAsync() {
899 <        Noop r = new Noop();
900 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
901 <        assertNull(f.join());
902 <        assertEquals(1, r.invocationCount);
903 <        checkCompletedNormally(f, null);
904 <    }
905 <
906 <    /**
907 <     * runAsync with executor completes after running Runnable
908 <     */
909 <    public void testRunAsync2() {
910 <        Noop r = new Noop();
911 <        ThreadExecutor exec = new ThreadExecutor();
912 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, exec);
913 <        assertNull(f.join());
914 <        assertEquals(1, r.invocationCount);
915 <        checkCompletedNormally(f, null);
916 <        assertEquals(1, exec.count.get());
917 <    }
918 <
919 <    /**
920 <     * failing runAsync completes exceptionally after running Runnable
921 <     */
922 <    public void testRunAsync3() {
923 <        FailingNoop r = new FailingNoop();
924 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
925 <        checkCompletedWithWrappedCFException(f);
926 <        assertEquals(1, r.invocationCount);
927 <    }
928 <
929 <    /**
930 <     * supplyAsync completes with result of supplier
931 <     */
932 <    public void testSupplyAsync() {
933 <        CompletableFuture<Integer> f;
934 <        f = CompletableFuture.supplyAsync(supplyOne);
935 <        assertEquals(f.join(), one);
936 <        checkCompletedNormally(f, one);
937 <    }
938 <
939 <    /**
940 <     * supplyAsync with executor completes with result of supplier
941 <     */
942 <    public void testSupplyAsync2() {
943 <        CompletableFuture<Integer> f;
944 <        f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
945 <        assertEquals(f.join(), one);
946 <        checkCompletedNormally(f, one);
947 <    }
948 <
949 <    /**
950 <     * Failing supplyAsync completes exceptionally
951 <     */
952 <    public void testSupplyAsync3() {
953 <        FailingSupplier r = new FailingSupplier();
954 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
955 <        checkCompletedWithWrappedCFException(f);
956 <        assertEquals(1, r.invocationCount);
957 <    }
958 <
959 <    // seq completion methods
960 <
961 <    /**
962 <     * thenRun result completes normally after normal completion of source
963 <     */
964 <    public void testThenRun() {
965 <        CompletableFuture<Integer> f;
966 <        CompletableFuture<Void> g;
967 <        Noop r;
968 <
969 <        f = new CompletableFuture<>();
970 <        g = f.thenRun(r = new Noop());
971 <        f.complete(null);
972 <        checkCompletedNormally(g, null);
973 <        assertEquals(1, r.invocationCount);
974 <
975 <        f = new CompletableFuture<>();
976 <        f.complete(null);
977 <        g = f.thenRun(r = new Noop());
978 <        checkCompletedNormally(g, null);
979 <        assertEquals(1, r.invocationCount);
980 <    }
981 <
982 <    /**
983 <     * thenRun result completes exceptionally after exceptional
984 <     * completion of source
985 <     */
986 <    public void testThenRun2() {
987 <        CompletableFuture<Integer> f;
988 <        CompletableFuture<Void> g;
989 <        Noop r;
990 <
991 <        f = new CompletableFuture<>();
992 <        g = f.thenRun(r = new Noop());
993 <        f.completeExceptionally(new CFException());
994 <        checkCompletedWithWrappedCFException(g);
995 <        assertEquals(0, r.invocationCount);
996 <
997 <        f = new CompletableFuture<>();
998 <        f.completeExceptionally(new CFException());
999 <        g = f.thenRun(r = new Noop());
1000 <        checkCompletedWithWrappedCFException(g);
1001 <        assertEquals(0, r.invocationCount);
1002 <    }
1003 <
1004 <    /**
1005 <     * thenRun result completes exceptionally if action does
1006 <     */
1007 <    public void testThenRun3() {
1008 <        CompletableFuture<Integer> f;
1009 <        CompletableFuture<Void> g;
1010 <        FailingNoop r;
1011 <
1012 <        f = new CompletableFuture<>();
1013 <        g = f.thenRun(r = new FailingNoop());
1014 <        f.complete(null);
1015 <        checkCompletedWithWrappedCFException(g);
1016 <
1017 <        f = new CompletableFuture<>();
1018 <        f.complete(null);
1019 <        g = f.thenRun(r = new FailingNoop());
1020 <        checkCompletedWithWrappedCFException(g);
1021 <    }
1022 <
1023 <    /**
1024 <     * thenRun result completes exceptionally if source cancelled
1025 <     */
1026 <    public void testThenRun4() {
1027 <        CompletableFuture<Integer> f;
1028 <        CompletableFuture<Void> g;
1029 <        Noop r;
1030 <
1031 <        f = new CompletableFuture<>();
1032 <        g = f.thenRun(r = new Noop());
1033 <        assertTrue(f.cancel(true));
1034 <        checkCompletedWithWrappedCancellationException(g);
1035 <
1036 <        f = new CompletableFuture<>();
1037 <        assertTrue(f.cancel(true));
1038 <        g = f.thenRun(r = new Noop());
1039 <        checkCompletedWithWrappedCancellationException(g);
1040 <    }
1041 <
1042 <    /**
1043 <     * thenApply result completes normally after normal completion of source
1044 <     */
1045 <    public void testThenApply() {
1046 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1047 <        CompletableFuture<Integer> g = f.thenApply(inc);
1048 <        f.complete(one);
1049 <        checkCompletedNormally(g, two);
1050 <    }
1051 <
1052 <    /**
1053 <     * thenApply result completes exceptionally after exceptional
1054 <     * completion of source
1055 <     */
1056 <    public void testThenApply2() {
1057 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1058 <        CompletableFuture<Integer> g = f.thenApply(inc);
1059 <        f.completeExceptionally(new CFException());
1060 <        checkCompletedWithWrappedCFException(g);
1061 <    }
1062 <
1063 <    /**
1064 <     * thenApply result completes exceptionally if action does
1065 <     */
1066 <    public void testThenApply3() {
1067 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1068 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1069 <        f.complete(one);
1070 <        checkCompletedWithWrappedCFException(g);
1071 <    }
1072 <
1073 <    /**
1074 <     * thenApply result completes exceptionally if source cancelled
1075 <     */
1076 <    public void testThenApply4() {
1077 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1078 <        CompletableFuture<Integer> g = f.thenApply(inc);
1079 <        assertTrue(f.cancel(true));
1080 <        checkCompletedWithWrappedCancellationException(g);
1081 <    }
1082 <
1083 <    /**
1084 <     * thenAccept result completes normally after normal completion of source
1085 <     */
1086 <    public void testThenAccept() {
1087 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1088 <        IncAction r = new IncAction();
1089 <        CompletableFuture<Void> g = f.thenAccept(r);
1090 <        f.complete(one);
1091 <        checkCompletedNormally(g, null);
1092 <        assertEquals(r.value, (Integer) 2);
1093 <    }
1094 <
1095 <    /**
1096 <     * thenAccept result completes exceptionally after exceptional
1097 <     * completion of source
1098 <     */
1099 <    public void testThenAccept2() {
1100 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1101 <        IncAction r = new IncAction();
1102 <        CompletableFuture<Void> g = f.thenAccept(r);
1103 <        f.completeExceptionally(new CFException());
1104 <        checkCompletedWithWrappedCFException(g);
1105 <    }
1106 <
1107 <    /**
1108 <     * thenAccept result completes exceptionally if action does
1109 <     */
1110 <    public void testThenAccept3() {
1111 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1112 <        FailingConsumer r = new FailingConsumer();
1113 <        CompletableFuture<Void> g = f.thenAccept(r);
1114 <        f.complete(one);
1115 <        checkCompletedWithWrappedCFException(g);
1116 <        assertEquals(1, r.invocationCount);
1117 <    }
1118 <
1119 <    /**
1120 <     * thenAccept result completes exceptionally if source cancelled
1121 <     */
1122 <    public void testThenAccept4() {
1123 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1124 <        IncAction r = new IncAction();
1125 <        CompletableFuture<Void> g = f.thenAccept(r);
1126 <        assertTrue(f.cancel(true));
1127 <        checkCompletedWithWrappedCancellationException(g);
1128 <    }
1129 <
1130 <    /**
1131 <     * thenCombine result completes normally after normal completion
1132 <     * of sources
1091 >     * handle action completes normally with function value on
1092 >     * exceptional completion of source
1093       */
1094 <    public void testThenCombine_normalCompletion1() {
1135 <        for (boolean createIncomplete : new boolean[] { true, false })
1136 <        for (boolean fFirst : new boolean[] { true, false })
1094 >    public void testHandle_exceptionalCompletion() {
1095          for (ExecutionMode m : ExecutionMode.values())
1096 +        for (boolean createIncomplete : new boolean[] { true, false })
1097          for (Integer v1 : new Integer[] { 1, null })
1139        for (Integer v2 : new Integer[] { 2, null })
1098      {
1099          final CompletableFuture<Integer> f = new CompletableFuture<>();
1100 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1101 <        final SubtractFunction r = new SubtractFunction();
1102 <        CompletableFuture<Integer> h = null;
1103 <        if (createIncomplete) h = m.thenCombine(f, g, r);
1104 <
1105 <        if (fFirst)
1106 <            f.complete(v1);
1107 <        else
1108 <            g.complete(v2);
1109 <        if (createIncomplete) checkIncomplete(h);
1110 <        assertEquals(0, r.invocationCount);
1111 <        if (!fFirst)
1112 <            f.complete(v1);
1155 <        else
1156 <            g.complete(v2);
1157 <        if (!createIncomplete) h = m.thenCombine(f, g, r);
1100 >        final AtomicInteger a = new AtomicInteger(0);
1101 >        final CFException ex = new CFException();
1102 >        if (!createIncomplete) f.completeExceptionally(ex);
1103 >        final CompletableFuture<Integer> g = m.handle
1104 >            (f,
1105 >             (Integer result, Throwable t) -> {
1106 >                m.checkExecutionMode();
1107 >                threadAssertNull(result);
1108 >                threadAssertSame(t, ex);
1109 >                a.getAndIncrement();
1110 >                return v1;
1111 >            });
1112 >        if (createIncomplete) f.completeExceptionally(ex);
1113  
1114 <        checkCompletedNormally(h, subtract(v1, v2));
1115 <        checkCompletedNormally(f, v1);
1116 <        checkCompletedNormally(g, v2);
1162 <        assertEquals(1, r.invocationCount);
1114 >        checkCompletedNormally(g, v1);
1115 >        checkCompletedExceptionally(f, ex);
1116 >        assertEquals(1, a.get());
1117      }}
1118  
1119      /**
1120 <     * thenCombine result completes exceptionally after exceptional
1121 <     * completion of either source
1120 >     * handle action completes normally with function value on
1121 >     * cancelled source
1122       */
1123 <    public void testThenCombine_exceptionalCompletion1() {
1123 >    public void testHandle_sourceCancelled() {
1124          for (ExecutionMode m : ExecutionMode.values())
1125 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1126 +        for (boolean createIncomplete : new boolean[] { true, false })
1127          for (Integer v1 : new Integer[] { 1, null })
1128      {
1129          final CompletableFuture<Integer> f = new CompletableFuture<>();
1130 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1131 <        final SubtractFunction r = new SubtractFunction();
1132 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1133 <        final CFException ex = new CFException();
1134 <
1135 <        f.completeExceptionally(ex);
1136 <        checkIncomplete(h);
1137 <        g.complete(v1);
1130 >        final AtomicInteger a = new AtomicInteger(0);
1131 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1132 >        final CompletableFuture<Integer> g = m.handle
1133 >            (f,
1134 >             (Integer result, Throwable t) -> {
1135 >                m.checkExecutionMode();
1136 >                threadAssertNull(result);
1137 >                threadAssertTrue(t instanceof CancellationException);
1138 >                a.getAndIncrement();
1139 >                return v1;
1140 >            });
1141 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1142  
1183        checkCompletedWithWrappedCFException(h, ex);
1184        checkCompletedWithWrappedCFException(f, ex);
1185        assertEquals(0, r.invocationCount);
1143          checkCompletedNormally(g, v1);
1144 +        checkCancelled(f);
1145 +        assertEquals(1, a.get());
1146      }}
1147  
1148 <    public void testThenCombine_exceptionalCompletion2() {
1148 >    /**
1149 >     * If a "handle action" throws an exception when triggered by
1150 >     * a normal completion, it completes exceptionally
1151 >     */
1152 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1153          for (ExecutionMode m : ExecutionMode.values())
1154 +        for (boolean createIncomplete : new boolean[] { true, false })
1155          for (Integer v1 : new Integer[] { 1, null })
1156      {
1157          final CompletableFuture<Integer> f = new CompletableFuture<>();
1158 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1195 <        final SubtractFunction r = new SubtractFunction();
1196 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1158 >        final AtomicInteger a = new AtomicInteger(0);
1159          final CFException ex = new CFException();
1160 +        if (!createIncomplete) assertTrue(f.complete(v1));
1161 +        final CompletableFuture<Integer> g = m.handle
1162 +            (f,
1163 +             (Integer result, Throwable t) -> {
1164 +                m.checkExecutionMode();
1165 +                threadAssertSame(result, v1);
1166 +                threadAssertNull(t);
1167 +                a.getAndIncrement();
1168 +                throw ex;
1169 +            });
1170 +        if (createIncomplete) assertTrue(f.complete(v1));
1171  
1172 <        g.completeExceptionally(ex);
1200 <        checkIncomplete(h);
1201 <        f.complete(v1);
1202 <
1203 <        checkCompletedWithWrappedCFException(h, ex);
1204 <        checkCompletedWithWrappedCFException(g, ex);
1205 <        assertEquals(0, r.invocationCount);
1172 >        checkCompletedWithWrappedException(g, ex);
1173          checkCompletedNormally(f, v1);
1174 +        assertEquals(1, a.get());
1175      }}
1176  
1177 <    public void testThenCombine_exceptionalCompletion3() {
1177 >    /**
1178 >     * If a "handle action" throws an exception when triggered by
1179 >     * a source completion that also throws an exception, the action
1180 >     * exception takes precedence (unlike whenComplete)
1181 >     */
1182 >    public void testHandle_sourceFailedActionFailed() {
1183 >        for (boolean createIncomplete : new boolean[] { true, false })
1184          for (ExecutionMode m : ExecutionMode.values())
1211        for (Integer v1 : new Integer[] { 1, null })
1185      {
1186 +        final AtomicInteger a = new AtomicInteger(0);
1187 +        final CFException ex1 = new CFException();
1188 +        final CFException ex2 = new CFException();
1189          final CompletableFuture<Integer> f = new CompletableFuture<>();
1214        final CompletableFuture<Integer> g = new CompletableFuture<>();
1215        final SubtractFunction r = new SubtractFunction();
1216        final CFException ex = new CFException();
1190  
1191 <        g.completeExceptionally(ex);
1192 <        f.complete(v1);
1193 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1191 >        if (!createIncomplete) f.completeExceptionally(ex1);
1192 >        final CompletableFuture<Integer> g = m.handle
1193 >            (f,
1194 >             (Integer result, Throwable t) -> {
1195 >                m.checkExecutionMode();
1196 >                threadAssertNull(result);
1197 >                threadAssertSame(ex1, t);
1198 >                a.getAndIncrement();
1199 >                throw ex2;
1200 >            });
1201 >        if (createIncomplete) f.completeExceptionally(ex1);
1202  
1203 <        checkCompletedWithWrappedCFException(h, ex);
1204 <        checkCompletedWithWrappedCFException(g, ex);
1205 <        assertEquals(0, r.invocationCount);
1225 <        checkCompletedNormally(f, v1);
1203 >        checkCompletedWithWrappedException(g, ex2);
1204 >        checkCompletedExceptionally(f, ex1);
1205 >        assertEquals(1, a.get());
1206      }}
1207  
1208 <    public void testThenCombine_exceptionalCompletion4() {
1209 <        for (ExecutionMode m : ExecutionMode.values())
1210 <        for (Integer v1 : new Integer[] { 1, null })
1208 >    /**
1209 >     * runAsync completes after running Runnable
1210 >     */
1211 >    public void testRunAsync_normalCompletion() {
1212 >        ExecutionMode[] executionModes = {
1213 >            ExecutionMode.ASYNC,
1214 >            ExecutionMode.EXECUTOR,
1215 >        };
1216 >        for (ExecutionMode m : executionModes)
1217      {
1218 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1219 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1220 <        final SubtractFunction r = new SubtractFunction();
1221 <        final CFException ex = new CFException();
1222 <
1237 <        f.completeExceptionally(ex);
1238 <        g.complete(v1);
1239 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1240 <
1241 <        checkCompletedWithWrappedCFException(h, ex);
1242 <        checkCompletedWithWrappedCFException(f, ex);
1243 <        assertEquals(0, r.invocationCount);
1244 <        checkCompletedNormally(g, v1);
1218 >        final Noop r = new Noop(m);
1219 >        final CompletableFuture<Void> f = m.runAsync(r);
1220 >        assertNull(f.join());
1221 >        checkCompletedNormally(f, null);
1222 >        r.assertInvoked();
1223      }}
1224  
1225      /**
1226 <     * thenCombine result completes exceptionally if action does
1226 >     * failing runAsync completes exceptionally after running Runnable
1227       */
1228 <    public void testThenCombine_actionFailed1() {
1229 <        for (ExecutionMode m : ExecutionMode.values())
1230 <        for (Integer v1 : new Integer[] { 1, null })
1231 <        for (Integer v2 : new Integer[] { 2, null })
1228 >    public void testRunAsync_exceptionalCompletion() {
1229 >        ExecutionMode[] executionModes = {
1230 >            ExecutionMode.ASYNC,
1231 >            ExecutionMode.EXECUTOR,
1232 >        };
1233 >        for (ExecutionMode m : executionModes)
1234      {
1235 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1236 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1237 <        final FailingBiFunction r = new FailingBiFunction();
1238 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1235 >        final FailingRunnable r = new FailingRunnable(m);
1236 >        final CompletableFuture<Void> f = m.runAsync(r);
1237 >        checkCompletedWithWrappedException(f, r.ex);
1238 >        r.assertInvoked();
1239 >    }}
1240  
1241 <        f.complete(v1);
1242 <        checkIncomplete(h);
1243 <        g.complete(v2);
1241 >    @SuppressWarnings("FutureReturnValueIgnored")
1242 >    public void testRunAsync_rejectingExecutor() {
1243 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1244 >        try {
1245 >            CompletableFuture.runAsync(() -> {}, e);
1246 >            shouldThrow();
1247 >        } catch (Throwable t) {
1248 >            assertSame(e.ex, t);
1249 >        }
1250  
1251 <        checkCompletedWithWrappedCFException(h);
1252 <        checkCompletedNormally(f, v1);
1266 <        checkCompletedNormally(g, v2);
1267 <    }}
1251 >        assertEquals(1, e.count.get());
1252 >    }
1253  
1254 <    public void testThenCombine_actionFailed2() {
1255 <        for (ExecutionMode m : ExecutionMode.values())
1254 >    /**
1255 >     * supplyAsync completes with result of supplier
1256 >     */
1257 >    public void testSupplyAsync_normalCompletion() {
1258 >        ExecutionMode[] executionModes = {
1259 >            ExecutionMode.ASYNC,
1260 >            ExecutionMode.EXECUTOR,
1261 >        };
1262 >        for (ExecutionMode m : executionModes)
1263          for (Integer v1 : new Integer[] { 1, null })
1272        for (Integer v2 : new Integer[] { 2, null })
1264      {
1265 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1266 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1267 <        final FailingBiFunction r = new FailingBiFunction();
1277 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1278 <
1279 <        g.complete(v2);
1280 <        checkIncomplete(h);
1281 <        f.complete(v1);
1282 <
1283 <        checkCompletedWithWrappedCFException(h);
1265 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1266 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1267 >        assertSame(v1, f.join());
1268          checkCompletedNormally(f, v1);
1269 <        checkCompletedNormally(g, v2);
1269 >        r.assertInvoked();
1270      }}
1271  
1272      /**
1273 <     * thenCombine result completes exceptionally if either source cancelled
1273 >     * Failing supplyAsync completes exceptionally
1274       */
1275 <    public void testThenCombine_sourceCancelled1() {
1276 <        for (ExecutionMode m : ExecutionMode.values())
1277 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1278 <        for (Integer v1 : new Integer[] { 1, null })
1275 >    public void testSupplyAsync_exceptionalCompletion() {
1276 >        ExecutionMode[] executionModes = {
1277 >            ExecutionMode.ASYNC,
1278 >            ExecutionMode.EXECUTOR,
1279 >        };
1280 >        for (ExecutionMode m : executionModes)
1281      {
1282 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1283 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1284 <        final SubtractFunction r = new SubtractFunction();
1285 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1282 >        FailingSupplier r = new FailingSupplier(m);
1283 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1284 >        checkCompletedWithWrappedException(f, r.ex);
1285 >        r.assertInvoked();
1286 >    }}
1287  
1288 <        assertTrue(f.cancel(mayInterruptIfRunning));
1289 <        checkIncomplete(h);
1290 <        g.complete(v1);
1288 >    @SuppressWarnings("FutureReturnValueIgnored")
1289 >    public void testSupplyAsync_rejectingExecutor() {
1290 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1291 >        try {
1292 >            CompletableFuture.supplyAsync(() -> null, e);
1293 >            shouldThrow();
1294 >        } catch (Throwable t) {
1295 >            assertSame(e.ex, t);
1296 >        }
1297  
1298 <        checkCompletedWithWrappedCancellationException(h);
1299 <        checkCancelled(f);
1307 <        assertEquals(0, r.invocationCount);
1308 <        checkCompletedNormally(g, v1);
1309 <    }}
1298 >        assertEquals(1, e.count.get());
1299 >    }
1300  
1301 <    public void testThenCombine_sourceCancelled2() {
1301 >    // seq completion methods
1302 >
1303 >    /**
1304 >     * thenRun result completes normally after normal completion of source
1305 >     */
1306 >    public void testThenRun_normalCompletion() {
1307          for (ExecutionMode m : ExecutionMode.values())
1313        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1308          for (Integer v1 : new Integer[] { 1, null })
1309      {
1310          final CompletableFuture<Integer> f = new CompletableFuture<>();
1311 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1312 <        final SubtractFunction r = new SubtractFunction();
1319 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1311 >        final Noop[] rs = new Noop[6];
1312 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1313  
1314 <        assertTrue(g.cancel(mayInterruptIfRunning));
1315 <        checkIncomplete(h);
1316 <        f.complete(v1);
1314 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1315 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1316 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1317 >        checkIncomplete(h0);
1318 >        checkIncomplete(h1);
1319 >        checkIncomplete(h2);
1320 >        assertTrue(f.complete(v1));
1321 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1322 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1323 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1324  
1325 <        checkCompletedWithWrappedCancellationException(h);
1326 <        checkCancelled(g);
1327 <        assertEquals(0, r.invocationCount);
1325 >        checkCompletedNormally(h0, null);
1326 >        checkCompletedNormally(h1, null);
1327 >        checkCompletedNormally(h2, null);
1328 >        checkCompletedNormally(h3, null);
1329 >        checkCompletedNormally(h4, null);
1330 >        checkCompletedNormally(h5, null);
1331          checkCompletedNormally(f, v1);
1332 +        for (Noop r : rs) r.assertInvoked();
1333      }}
1334  
1335 <    public void testThenCombine_sourceCancelled3() {
1335 >    /**
1336 >     * thenRun result completes exceptionally after exceptional
1337 >     * completion of source
1338 >     */
1339 >    public void testThenRun_exceptionalCompletion() {
1340          for (ExecutionMode m : ExecutionMode.values())
1333        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1334        for (Integer v1 : new Integer[] { 1, null })
1341      {
1342 +        final CFException ex = new CFException();
1343          final CompletableFuture<Integer> f = new CompletableFuture<>();
1344 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1345 <        final SubtractFunction r = new SubtractFunction();
1339 <
1340 <        assertTrue(g.cancel(mayInterruptIfRunning));
1341 <        f.complete(v1);
1342 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1344 >        final Noop[] rs = new Noop[6];
1345 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1346  
1347 <        checkCompletedWithWrappedCancellationException(h);
1348 <        checkCancelled(g);
1349 <        assertEquals(0, r.invocationCount);
1350 <        checkCompletedNormally(f, v1);
1347 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1348 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1349 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1350 >        checkIncomplete(h0);
1351 >        checkIncomplete(h1);
1352 >        checkIncomplete(h2);
1353 >        assertTrue(f.completeExceptionally(ex));
1354 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1355 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1356 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1357 >
1358 >        checkCompletedWithWrappedException(h0, ex);
1359 >        checkCompletedWithWrappedException(h1, ex);
1360 >        checkCompletedWithWrappedException(h2, ex);
1361 >        checkCompletedWithWrappedException(h3, ex);
1362 >        checkCompletedWithWrappedException(h4, ex);
1363 >        checkCompletedWithWrappedException(h5, ex);
1364 >        checkCompletedExceptionally(f, ex);
1365 >        for (Noop r : rs) r.assertNotInvoked();
1366      }}
1367  
1368 <    public void testThenCombine_sourceCancelled4() {
1368 >    /**
1369 >     * thenRun result completes exceptionally if source cancelled
1370 >     */
1371 >    public void testThenRun_sourceCancelled() {
1372          for (ExecutionMode m : ExecutionMode.values())
1373          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1353        for (Integer v1 : new Integer[] { 1, null })
1374      {
1375          final CompletableFuture<Integer> f = new CompletableFuture<>();
1376 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1377 <        final SubtractFunction r = new SubtractFunction();
1376 >        final Noop[] rs = new Noop[6];
1377 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1378  
1379 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1380 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1381 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1382 +        checkIncomplete(h0);
1383 +        checkIncomplete(h1);
1384 +        checkIncomplete(h2);
1385          assertTrue(f.cancel(mayInterruptIfRunning));
1386 <        g.complete(v1);
1387 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1388 <
1389 <        checkCompletedWithWrappedCancellationException(h);
1386 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1387 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1388 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1389 >
1390 >        checkCompletedWithWrappedCancellationException(h0);
1391 >        checkCompletedWithWrappedCancellationException(h1);
1392 >        checkCompletedWithWrappedCancellationException(h2);
1393 >        checkCompletedWithWrappedCancellationException(h3);
1394 >        checkCompletedWithWrappedCancellationException(h4);
1395 >        checkCompletedWithWrappedCancellationException(h5);
1396          checkCancelled(f);
1397 <        assertEquals(0, r.invocationCount);
1366 <        checkCompletedNormally(g, v1);
1397 >        for (Noop r : rs) r.assertNotInvoked();
1398      }}
1399  
1400      /**
1401 <     * thenAcceptBoth result completes normally after normal
1371 <     * completion of sources
1401 >     * thenRun result completes exceptionally if action does
1402       */
1403 <    public void testThenAcceptBoth_normalCompletion1() {
1374 <        for (ExecutionMode m : ExecutionMode.values())
1375 <        for (Integer v1 : new Integer[] { 1, null })
1376 <        for (Integer v2 : new Integer[] { 2, null })
1377 <    {
1378 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1379 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1380 <        final SubtractAction r = new SubtractAction();
1381 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1382 <
1383 <        f.complete(v1);
1384 <        checkIncomplete(h);
1385 <        assertEquals(0, r.invocationCount);
1386 <        g.complete(v2);
1387 <
1388 <        checkCompletedNormally(h, null);
1389 <        assertEquals(subtract(v1, v2), r.value);
1390 <        checkCompletedNormally(f, v1);
1391 <        checkCompletedNormally(g, v2);
1392 <    }}
1393 <
1394 <    public void testThenAcceptBoth_normalCompletion2() {
1403 >    public void testThenRun_actionFailed() {
1404          for (ExecutionMode m : ExecutionMode.values())
1405          for (Integer v1 : new Integer[] { 1, null })
1397        for (Integer v2 : new Integer[] { 2, null })
1406      {
1407          final CompletableFuture<Integer> f = new CompletableFuture<>();
1408 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1409 <        final SubtractAction r = new SubtractAction();
1402 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1408 >        final FailingRunnable[] rs = new FailingRunnable[6];
1409 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1410  
1411 <        g.complete(v2);
1412 <        checkIncomplete(h);
1413 <        assertEquals(0, r.invocationCount);
1414 <        f.complete(v1);
1411 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1412 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1413 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1414 >        assertTrue(f.complete(v1));
1415 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1416 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1417 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1418  
1419 <        checkCompletedNormally(h, null);
1420 <        assertEquals(subtract(v1, v2), r.value);
1419 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1420 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1421 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1422 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1423 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1424 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1425          checkCompletedNormally(f, v1);
1412        checkCompletedNormally(g, v2);
1426      }}
1427  
1428 <    public void testThenAcceptBoth_normalCompletion3() {
1429 <        for (ExecutionMode m : ExecutionMode.values())
1430 <        for (Integer v1 : new Integer[] { 1, null })
1431 <        for (Integer v2 : new Integer[] { 2, null })
1419 <    {
1420 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1421 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1422 <        final SubtractAction r = new SubtractAction();
1423 <
1424 <        g.complete(v2);
1425 <        f.complete(v1);
1426 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1427 <
1428 <        checkCompletedNormally(h, null);
1429 <        assertEquals(subtract(v1, v2), r.value);
1430 <        checkCompletedNormally(f, v1);
1431 <        checkCompletedNormally(g, v2);
1432 <    }}
1433 <
1434 <    public void testThenAcceptBoth_normalCompletion4() {
1428 >    /**
1429 >     * thenApply result completes normally after normal completion of source
1430 >     */
1431 >    public void testThenApply_normalCompletion() {
1432          for (ExecutionMode m : ExecutionMode.values())
1433          for (Integer v1 : new Integer[] { 1, null })
1437        for (Integer v2 : new Integer[] { 2, null })
1434      {
1435          final CompletableFuture<Integer> f = new CompletableFuture<>();
1436 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1437 <        final SubtractAction r = new SubtractAction();
1436 >        final IncFunction[] rs = new IncFunction[4];
1437 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1438  
1439 <        f.complete(v1);
1440 <        g.complete(v2);
1441 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1439 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1440 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1441 >        checkIncomplete(h0);
1442 >        checkIncomplete(h1);
1443 >        assertTrue(f.complete(v1));
1444 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1445 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1446  
1447 <        checkCompletedNormally(h, null);
1448 <        assertEquals(subtract(v1, v2), r.value);
1447 >        checkCompletedNormally(h0, inc(v1));
1448 >        checkCompletedNormally(h1, inc(v1));
1449 >        checkCompletedNormally(h2, inc(v1));
1450 >        checkCompletedNormally(h3, inc(v1));
1451          checkCompletedNormally(f, v1);
1452 <        checkCompletedNormally(g, v2);
1452 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1453      }}
1454  
1455      /**
1456 <     * thenAcceptBoth result completes exceptionally after exceptional
1457 <     * completion of either source
1456 >     * thenApply result completes exceptionally after exceptional
1457 >     * completion of source
1458       */
1459 <    public void testThenAcceptBoth_exceptionalCompletion1() {
1459 >    public void testThenApply_exceptionalCompletion() {
1460          for (ExecutionMode m : ExecutionMode.values())
1459        for (Integer v1 : new Integer[] { 1, null })
1461      {
1461        final CompletableFuture<Integer> f = new CompletableFuture<>();
1462        final CompletableFuture<Integer> g = new CompletableFuture<>();
1463        final SubtractAction r = new SubtractAction();
1464        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1462          final CFException ex = new CFException();
1466
1467        f.completeExceptionally(ex);
1468        checkIncomplete(h);
1469        g.complete(v1);
1470
1471        checkCompletedWithWrappedCFException(h, ex);
1472        checkCompletedWithWrappedCFException(f, ex);
1473        assertEquals(0, r.invocationCount);
1474        checkCompletedNormally(g, v1);
1475    }}
1476
1477    public void testThenAcceptBoth_exceptionalCompletion2() {
1478        for (ExecutionMode m : ExecutionMode.values())
1479        for (Integer v1 : new Integer[] { 1, null })
1480    {
1463          final CompletableFuture<Integer> f = new CompletableFuture<>();
1464 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1465 <        final SubtractAction r = new SubtractAction();
1484 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1485 <        final CFException ex = new CFException();
1486 <
1487 <        g.completeExceptionally(ex);
1488 <        checkIncomplete(h);
1489 <        f.complete(v1);
1464 >        final IncFunction[] rs = new IncFunction[4];
1465 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1466  
1467 <        checkCompletedWithWrappedCFException(h, ex);
1468 <        checkCompletedWithWrappedCFException(g, ex);
1469 <        assertEquals(0, r.invocationCount);
1470 <        checkCompletedNormally(f, v1);
1467 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1468 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1469 >        assertTrue(f.completeExceptionally(ex));
1470 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1471 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1472 >
1473 >        checkCompletedWithWrappedException(h0, ex);
1474 >        checkCompletedWithWrappedException(h1, ex);
1475 >        checkCompletedWithWrappedException(h2, ex);
1476 >        checkCompletedWithWrappedException(h3, ex);
1477 >        checkCompletedExceptionally(f, ex);
1478 >        for (IncFunction r : rs) r.assertNotInvoked();
1479      }}
1480  
1481 <    public void testThenAcceptBoth_exceptionalCompletion3() {
1481 >    /**
1482 >     * thenApply result completes exceptionally if source cancelled
1483 >     */
1484 >    public void testThenApply_sourceCancelled() {
1485          for (ExecutionMode m : ExecutionMode.values())
1486 <        for (Integer v1 : new Integer[] { 1, null })
1486 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1487      {
1488          final CompletableFuture<Integer> f = new CompletableFuture<>();
1489 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1490 <        final SubtractAction r = new SubtractAction();
1504 <        final CFException ex = new CFException();
1489 >        final IncFunction[] rs = new IncFunction[4];
1490 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1491  
1492 <        g.completeExceptionally(ex);
1493 <        f.complete(v1);
1494 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1492 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1493 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1494 >        assertTrue(f.cancel(mayInterruptIfRunning));
1495 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1496 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1497  
1498 <        checkCompletedWithWrappedCFException(h, ex);
1499 <        checkCompletedWithWrappedCFException(g, ex);
1500 <        assertEquals(0, r.invocationCount);
1501 <        checkCompletedNormally(f, v1);
1498 >        checkCompletedWithWrappedCancellationException(h0);
1499 >        checkCompletedWithWrappedCancellationException(h1);
1500 >        checkCompletedWithWrappedCancellationException(h2);
1501 >        checkCompletedWithWrappedCancellationException(h3);
1502 >        checkCancelled(f);
1503 >        for (IncFunction r : rs) r.assertNotInvoked();
1504      }}
1505  
1506 <    public void testThenAcceptBoth_exceptionalCompletion4() {
1506 >    /**
1507 >     * thenApply result completes exceptionally if action does
1508 >     */
1509 >    public void testThenApply_actionFailed() {
1510          for (ExecutionMode m : ExecutionMode.values())
1511          for (Integer v1 : new Integer[] { 1, null })
1512      {
1513          final CompletableFuture<Integer> f = new CompletableFuture<>();
1514 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1515 <        final SubtractAction r = new SubtractAction();
1523 <        final CFException ex = new CFException();
1514 >        final FailingFunction[] rs = new FailingFunction[4];
1515 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1516  
1517 <        f.completeExceptionally(ex);
1518 <        g.complete(v1);
1519 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1517 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1518 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1519 >        assertTrue(f.complete(v1));
1520 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1521 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1522  
1523 <        checkCompletedWithWrappedCFException(h, ex);
1524 <        checkCompletedWithWrappedCFException(f, ex);
1525 <        assertEquals(0, r.invocationCount);
1526 <        checkCompletedNormally(g, v1);
1523 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1524 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1525 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1526 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1527 >        checkCompletedNormally(f, v1);
1528      }}
1529  
1530      /**
1531 <     * thenAcceptBoth result completes exceptionally if action does
1531 >     * thenAccept result completes normally after normal completion of source
1532       */
1533 <    public void testThenAcceptBoth_actionFailed1() {
1533 >    public void testThenAccept_normalCompletion() {
1534          for (ExecutionMode m : ExecutionMode.values())
1535          for (Integer v1 : new Integer[] { 1, null })
1541        for (Integer v2 : new Integer[] { 2, null })
1536      {
1537          final CompletableFuture<Integer> f = new CompletableFuture<>();
1538 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1539 <        final FailingBiConsumer r = new FailingBiConsumer();
1546 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1538 >        final NoopConsumer[] rs = new NoopConsumer[4];
1539 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1540  
1541 <        f.complete(v1);
1542 <        checkIncomplete(h);
1543 <        g.complete(v2);
1541 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1542 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1543 >        checkIncomplete(h0);
1544 >        checkIncomplete(h1);
1545 >        assertTrue(f.complete(v1));
1546 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1547 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1548  
1549 <        checkCompletedWithWrappedCFException(h);
1549 >        checkCompletedNormally(h0, null);
1550 >        checkCompletedNormally(h1, null);
1551 >        checkCompletedNormally(h2, null);
1552 >        checkCompletedNormally(h3, null);
1553          checkCompletedNormally(f, v1);
1554 <        checkCompletedNormally(g, v2);
1554 >        for (NoopConsumer r : rs) r.assertValue(v1);
1555      }}
1556  
1557 <    public void testThenAcceptBoth_actionFailed2() {
1557 >    /**
1558 >     * thenAccept result completes exceptionally after exceptional
1559 >     * completion of source
1560 >     */
1561 >    public void testThenAccept_exceptionalCompletion() {
1562          for (ExecutionMode m : ExecutionMode.values())
1559        for (Integer v1 : new Integer[] { 1, null })
1560        for (Integer v2 : new Integer[] { 2, null })
1563      {
1564 +        final CFException ex = new CFException();
1565          final CompletableFuture<Integer> f = new CompletableFuture<>();
1566 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1567 <        final FailingBiConsumer r = new FailingBiConsumer();
1565 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1566 <
1567 <        g.complete(v2);
1568 <        checkIncomplete(h);
1569 <        f.complete(v1);
1566 >        final NoopConsumer[] rs = new NoopConsumer[4];
1567 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1568  
1569 <        checkCompletedWithWrappedCFException(h);
1570 <        checkCompletedNormally(f, v1);
1571 <        checkCompletedNormally(g, v2);
1569 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1570 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1571 >        assertTrue(f.completeExceptionally(ex));
1572 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1573 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1574 >
1575 >        checkCompletedWithWrappedException(h0, ex);
1576 >        checkCompletedWithWrappedException(h1, ex);
1577 >        checkCompletedWithWrappedException(h2, ex);
1578 >        checkCompletedWithWrappedException(h3, ex);
1579 >        checkCompletedExceptionally(f, ex);
1580 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1581      }}
1582  
1583      /**
1584 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1584 >     * thenAccept result completes exceptionally if source cancelled
1585       */
1586 <    public void testThenAcceptBoth_sourceCancelled1() {
1586 >    public void testThenAccept_sourceCancelled() {
1587          for (ExecutionMode m : ExecutionMode.values())
1588          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1582        for (Integer v1 : new Integer[] { 1, null })
1589      {
1590          final CompletableFuture<Integer> f = new CompletableFuture<>();
1591 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1592 <        final SubtractAction r = new SubtractAction();
1587 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1591 >        final NoopConsumer[] rs = new NoopConsumer[4];
1592 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1593  
1594 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1595 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1596          assertTrue(f.cancel(mayInterruptIfRunning));
1597 <        checkIncomplete(h);
1598 <        g.complete(v1);
1597 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1598 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1599  
1600 <        checkCompletedWithWrappedCancellationException(h);
1600 >        checkCompletedWithWrappedCancellationException(h0);
1601 >        checkCompletedWithWrappedCancellationException(h1);
1602 >        checkCompletedWithWrappedCancellationException(h2);
1603 >        checkCompletedWithWrappedCancellationException(h3);
1604          checkCancelled(f);
1605 <        assertEquals(0, r.invocationCount);
1596 <        checkCompletedNormally(g, v1);
1605 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1606      }}
1607  
1608 <    public void testThenAcceptBoth_sourceCancelled2() {
1608 >    /**
1609 >     * thenAccept result completes exceptionally if action does
1610 >     */
1611 >    public void testThenAccept_actionFailed() {
1612          for (ExecutionMode m : ExecutionMode.values())
1601        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1613          for (Integer v1 : new Integer[] { 1, null })
1614      {
1615          final CompletableFuture<Integer> f = new CompletableFuture<>();
1616 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1617 <        final SubtractAction r = new SubtractAction();
1607 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1616 >        final FailingConsumer[] rs = new FailingConsumer[4];
1617 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1618  
1619 <        assertTrue(g.cancel(mayInterruptIfRunning));
1620 <        checkIncomplete(h);
1621 <        f.complete(v1);
1619 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1620 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1621 >        assertTrue(f.complete(v1));
1622 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1623 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1624  
1625 <        checkCompletedWithWrappedCancellationException(h);
1626 <        checkCancelled(g);
1627 <        assertEquals(0, r.invocationCount);
1625 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1626 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1627 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1628 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1629          checkCompletedNormally(f, v1);
1630      }}
1631  
1632 <    public void testThenAcceptBoth_sourceCancelled3() {
1632 >    /**
1633 >     * thenCombine result completes normally after normal completion
1634 >     * of sources
1635 >     */
1636 >    public void testThenCombine_normalCompletion() {
1637          for (ExecutionMode m : ExecutionMode.values())
1638 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1638 >        for (boolean fFirst : new boolean[] { true, false })
1639          for (Integer v1 : new Integer[] { 1, null })
1640 +        for (Integer v2 : new Integer[] { 2, null })
1641      {
1642          final CompletableFuture<Integer> f = new CompletableFuture<>();
1643          final CompletableFuture<Integer> g = new CompletableFuture<>();
1644 <        final SubtractAction r = new SubtractAction();
1644 >        final SubtractFunction[] rs = new SubtractFunction[6];
1645 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1646  
1647 <        assertTrue(g.cancel(mayInterruptIfRunning));
1648 <        f.complete(v1);
1649 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1647 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1648 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1649 >        final Integer w1 =  fFirst ? v1 : v2;
1650 >        final Integer w2 = !fFirst ? v1 : v2;
1651 >
1652 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1653 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1654 >        assertTrue(fst.complete(w1));
1655 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1656 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1657 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1658 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1659 >        checkCompletedNormally(h1, subtract(w1, w1));
1660 >        checkCompletedNormally(h3, subtract(w1, w1));
1661 >        rs[1].assertValue(subtract(w1, w1));
1662 >        rs[3].assertValue(subtract(w1, w1));
1663 >        assertTrue(snd.complete(w2));
1664 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1665 >
1666 >        checkCompletedNormally(h0, subtract(v1, v2));
1667 >        checkCompletedNormally(h2, subtract(v1, v2));
1668 >        checkCompletedNormally(h4, subtract(v1, v2));
1669 >        rs[0].assertValue(subtract(v1, v2));
1670 >        rs[2].assertValue(subtract(v1, v2));
1671 >        rs[4].assertValue(subtract(v1, v2));
1672  
1632        checkCompletedWithWrappedCancellationException(h);
1633        checkCancelled(g);
1634        assertEquals(0, r.invocationCount);
1673          checkCompletedNormally(f, v1);
1674 <    }}
1637 <
1638 <    public void testThenAcceptBoth_sourceCancelled4() {
1639 <        for (ExecutionMode m : ExecutionMode.values())
1640 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1641 <        for (Integer v1 : new Integer[] { 1, null })
1642 <    {
1643 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1644 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1645 <        final SubtractAction r = new SubtractAction();
1646 <
1647 <        assertTrue(f.cancel(mayInterruptIfRunning));
1648 <        g.complete(v1);
1649 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1650 <
1651 <        checkCompletedWithWrappedCancellationException(h);
1652 <        checkCancelled(f);
1653 <        assertEquals(0, r.invocationCount);
1654 <        checkCompletedNormally(g, v1);
1674 >        checkCompletedNormally(g, v2);
1675      }}
1676  
1677      /**
1678 <     * runAfterBoth result completes normally after normal
1679 <     * completion of sources
1678 >     * thenCombine result completes exceptionally after exceptional
1679 >     * completion of either source
1680       */
1681 <    public void testRunAfterBoth_normalCompletion1() {
1681 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1682          for (ExecutionMode m : ExecutionMode.values())
1683 +        for (boolean fFirst : new boolean[] { true, false })
1684 +        for (boolean failFirst : new boolean[] { true, false })
1685          for (Integer v1 : new Integer[] { 1, null })
1664        for (Integer v2 : new Integer[] { 2, null })
1686      {
1687          final CompletableFuture<Integer> f = new CompletableFuture<>();
1688          final CompletableFuture<Integer> g = new CompletableFuture<>();
1689 <        final Noop r = new Noop();
1690 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1691 <
1692 <        f.complete(v1);
1693 <        checkIncomplete(h);
1694 <        assertEquals(0, r.invocationCount);
1695 <        g.complete(v2);
1696 <
1697 <        checkCompletedNormally(h, null);
1698 <        assertEquals(1, r.invocationCount);
1699 <        checkCompletedNormally(f, v1);
1700 <        checkCompletedNormally(g, v2);
1689 >        final CFException ex = new CFException();
1690 >        final SubtractFunction r1 = new SubtractFunction(m);
1691 >        final SubtractFunction r2 = new SubtractFunction(m);
1692 >        final SubtractFunction r3 = new SubtractFunction(m);
1693 >
1694 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1695 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1696 >        final Callable<Boolean> complete1 = failFirst ?
1697 >            () -> fst.completeExceptionally(ex) :
1698 >            () -> fst.complete(v1);
1699 >        final Callable<Boolean> complete2 = failFirst ?
1700 >            () -> snd.complete(v1) :
1701 >            () -> snd.completeExceptionally(ex);
1702 >
1703 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1704 >        assertTrue(complete1.call());
1705 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1706 >        checkIncomplete(h1);
1707 >        checkIncomplete(h2);
1708 >        assertTrue(complete2.call());
1709 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1710 >
1711 >        checkCompletedWithWrappedException(h1, ex);
1712 >        checkCompletedWithWrappedException(h2, ex);
1713 >        checkCompletedWithWrappedException(h3, ex);
1714 >        r1.assertNotInvoked();
1715 >        r2.assertNotInvoked();
1716 >        r3.assertNotInvoked();
1717 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1718 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1719      }}
1720  
1721 <    public void testRunAfterBoth_normalCompletion2() {
1721 >    /**
1722 >     * thenCombine result completes exceptionally if either source cancelled
1723 >     */
1724 >    public void testThenCombine_sourceCancelled() throws Throwable {
1725          for (ExecutionMode m : ExecutionMode.values())
1726 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1727 +        for (boolean fFirst : new boolean[] { true, false })
1728 +        for (boolean failFirst : new boolean[] { true, false })
1729          for (Integer v1 : new Integer[] { 1, null })
1685        for (Integer v2 : new Integer[] { 2, null })
1730      {
1731          final CompletableFuture<Integer> f = new CompletableFuture<>();
1732          final CompletableFuture<Integer> g = new CompletableFuture<>();
1733 <        final Noop r = new Noop();
1734 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1735 <
1736 <        g.complete(v2);
1737 <        checkIncomplete(h);
1738 <        assertEquals(0, r.invocationCount);
1739 <        f.complete(v1);
1740 <
1741 <        checkCompletedNormally(h, null);
1742 <        assertEquals(1, r.invocationCount);
1743 <        checkCompletedNormally(f, v1);
1744 <        checkCompletedNormally(g, v2);
1733 >        final SubtractFunction r1 = new SubtractFunction(m);
1734 >        final SubtractFunction r2 = new SubtractFunction(m);
1735 >        final SubtractFunction r3 = new SubtractFunction(m);
1736 >
1737 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1738 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1739 >        final Callable<Boolean> complete1 = failFirst ?
1740 >            () -> fst.cancel(mayInterruptIfRunning) :
1741 >            () -> fst.complete(v1);
1742 >        final Callable<Boolean> complete2 = failFirst ?
1743 >            () -> snd.complete(v1) :
1744 >            () -> snd.cancel(mayInterruptIfRunning);
1745 >
1746 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1747 >        assertTrue(complete1.call());
1748 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1749 >        checkIncomplete(h1);
1750 >        checkIncomplete(h2);
1751 >        assertTrue(complete2.call());
1752 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1753 >
1754 >        checkCompletedWithWrappedCancellationException(h1);
1755 >        checkCompletedWithWrappedCancellationException(h2);
1756 >        checkCompletedWithWrappedCancellationException(h3);
1757 >        r1.assertNotInvoked();
1758 >        r2.assertNotInvoked();
1759 >        r3.assertNotInvoked();
1760 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1761 >        checkCancelled(failFirst ? fst : snd);
1762      }}
1763  
1764 <    public void testRunAfterBoth_normalCompletion3() {
1764 >    /**
1765 >     * thenCombine result completes exceptionally if action does
1766 >     */
1767 >    public void testThenCombine_actionFailed() {
1768          for (ExecutionMode m : ExecutionMode.values())
1769 +        for (boolean fFirst : new boolean[] { true, false })
1770          for (Integer v1 : new Integer[] { 1, null })
1771          for (Integer v2 : new Integer[] { 2, null })
1772      {
1773          final CompletableFuture<Integer> f = new CompletableFuture<>();
1774          final CompletableFuture<Integer> g = new CompletableFuture<>();
1775 <        final Noop r = new Noop();
1776 <
1777 <        g.complete(v2);
1778 <        f.complete(v1);
1779 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1780 <
1781 <        checkCompletedNormally(h, null);
1782 <        assertEquals(1, r.invocationCount);
1775 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1776 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1777 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1778 >
1779 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1780 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1781 >        final Integer w1 =  fFirst ? v1 : v2;
1782 >        final Integer w2 = !fFirst ? v1 : v2;
1783 >
1784 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1785 >        assertTrue(fst.complete(w1));
1786 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1787 >        assertTrue(snd.complete(w2));
1788 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1789 >
1790 >        checkCompletedWithWrappedException(h1, r1.ex);
1791 >        checkCompletedWithWrappedException(h2, r2.ex);
1792 >        checkCompletedWithWrappedException(h3, r3.ex);
1793 >        r1.assertInvoked();
1794 >        r2.assertInvoked();
1795 >        r3.assertInvoked();
1796          checkCompletedNormally(f, v1);
1797          checkCompletedNormally(g, v2);
1798      }}
1799  
1800 <    public void testRunAfterBoth_normalCompletion4() {
1800 >    /**
1801 >     * thenAcceptBoth result completes normally after normal
1802 >     * completion of sources
1803 >     */
1804 >    public void testThenAcceptBoth_normalCompletion() {
1805          for (ExecutionMode m : ExecutionMode.values())
1806 +        for (boolean fFirst : new boolean[] { true, false })
1807          for (Integer v1 : new Integer[] { 1, null })
1808          for (Integer v2 : new Integer[] { 2, null })
1809      {
1810          final CompletableFuture<Integer> f = new CompletableFuture<>();
1811          final CompletableFuture<Integer> g = new CompletableFuture<>();
1812 <        final Noop r = new Noop();
1813 <
1814 <        f.complete(v1);
1815 <        g.complete(v2);
1816 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1817 <
1818 <        checkCompletedNormally(h, null);
1819 <        assertEquals(1, r.invocationCount);
1812 >        final SubtractAction r1 = new SubtractAction(m);
1813 >        final SubtractAction r2 = new SubtractAction(m);
1814 >        final SubtractAction r3 = new SubtractAction(m);
1815 >
1816 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1817 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1818 >        final Integer w1 =  fFirst ? v1 : v2;
1819 >        final Integer w2 = !fFirst ? v1 : v2;
1820 >
1821 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1822 >        assertTrue(fst.complete(w1));
1823 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1824 >        checkIncomplete(h1);
1825 >        checkIncomplete(h2);
1826 >        r1.assertNotInvoked();
1827 >        r2.assertNotInvoked();
1828 >        assertTrue(snd.complete(w2));
1829 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1830 >
1831 >        checkCompletedNormally(h1, null);
1832 >        checkCompletedNormally(h2, null);
1833 >        checkCompletedNormally(h3, null);
1834 >        r1.assertValue(subtract(v1, v2));
1835 >        r2.assertValue(subtract(v1, v2));
1836 >        r3.assertValue(subtract(v1, v2));
1837          checkCompletedNormally(f, v1);
1838          checkCompletedNormally(g, v2);
1839      }}
1840  
1841      /**
1842 <     * runAfterBoth result completes exceptionally after exceptional
1842 >     * thenAcceptBoth result completes exceptionally after exceptional
1843       * completion of either source
1844       */
1845 <    public void testRunAfterBoth_exceptionalCompletion1() {
1746 <        for (ExecutionMode m : ExecutionMode.values())
1747 <        for (Integer v1 : new Integer[] { 1, null })
1748 <    {
1749 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1750 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1751 <        final Noop r = new Noop();
1752 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1753 <        final CFException ex = new CFException();
1754 <
1755 <        f.completeExceptionally(ex);
1756 <        checkIncomplete(h);
1757 <        g.complete(v1);
1758 <
1759 <        checkCompletedWithWrappedCFException(h, ex);
1760 <        checkCompletedWithWrappedCFException(f, ex);
1761 <        assertEquals(0, r.invocationCount);
1762 <        checkCompletedNormally(g, v1);
1763 <    }}
1764 <
1765 <    public void testRunAfterBoth_exceptionalCompletion2() {
1766 <        for (ExecutionMode m : ExecutionMode.values())
1767 <        for (Integer v1 : new Integer[] { 1, null })
1768 <    {
1769 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1770 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1771 <        final Noop r = new Noop();
1772 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1773 <        final CFException ex = new CFException();
1774 <
1775 <        g.completeExceptionally(ex);
1776 <        checkIncomplete(h);
1777 <        f.complete(v1);
1778 <
1779 <        checkCompletedWithWrappedCFException(h, ex);
1780 <        checkCompletedWithWrappedCFException(g, ex);
1781 <        assertEquals(0, r.invocationCount);
1782 <        checkCompletedNormally(f, v1);
1783 <    }}
1784 <
1785 <    public void testRunAfterBoth_exceptionalCompletion3() {
1845 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1846          for (ExecutionMode m : ExecutionMode.values())
1847 +        for (boolean fFirst : new boolean[] { true, false })
1848 +        for (boolean failFirst : new boolean[] { true, false })
1849          for (Integer v1 : new Integer[] { 1, null })
1850      {
1851          final CompletableFuture<Integer> f = new CompletableFuture<>();
1852          final CompletableFuture<Integer> g = new CompletableFuture<>();
1791        final Noop r = new Noop();
1853          final CFException ex = new CFException();
1854 <
1855 <        g.completeExceptionally(ex);
1856 <        f.complete(v1);
1857 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1858 <
1859 <        checkCompletedWithWrappedCFException(h, ex);
1860 <        checkCompletedWithWrappedCFException(g, ex);
1861 <        assertEquals(0, r.invocationCount);
1862 <        checkCompletedNormally(f, v1);
1854 >        final SubtractAction r1 = new SubtractAction(m);
1855 >        final SubtractAction r2 = new SubtractAction(m);
1856 >        final SubtractAction r3 = new SubtractAction(m);
1857 >
1858 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1859 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1860 >        final Callable<Boolean> complete1 = failFirst ?
1861 >            () -> fst.completeExceptionally(ex) :
1862 >            () -> fst.complete(v1);
1863 >        final Callable<Boolean> complete2 = failFirst ?
1864 >            () -> snd.complete(v1) :
1865 >            () -> snd.completeExceptionally(ex);
1866 >
1867 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1868 >        assertTrue(complete1.call());
1869 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1870 >        checkIncomplete(h1);
1871 >        checkIncomplete(h2);
1872 >        assertTrue(complete2.call());
1873 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1874 >
1875 >        checkCompletedWithWrappedException(h1, ex);
1876 >        checkCompletedWithWrappedException(h2, ex);
1877 >        checkCompletedWithWrappedException(h3, ex);
1878 >        r1.assertNotInvoked();
1879 >        r2.assertNotInvoked();
1880 >        r3.assertNotInvoked();
1881 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1882 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1883      }}
1884  
1885 <    public void testRunAfterBoth_exceptionalCompletion4() {
1885 >    /**
1886 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1887 >     */
1888 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1889          for (ExecutionMode m : ExecutionMode.values())
1890 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1891 +        for (boolean fFirst : new boolean[] { true, false })
1892 +        for (boolean failFirst : new boolean[] { true, false })
1893          for (Integer v1 : new Integer[] { 1, null })
1894      {
1895          final CompletableFuture<Integer> f = new CompletableFuture<>();
1896          final CompletableFuture<Integer> g = new CompletableFuture<>();
1897 <        final Noop r = new Noop();
1898 <        final CFException ex = new CFException();
1899 <
1900 <        f.completeExceptionally(ex);
1901 <        g.complete(v1);
1902 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1903 <
1904 <        checkCompletedWithWrappedCFException(h, ex);
1905 <        checkCompletedWithWrappedCFException(f, ex);
1906 <        assertEquals(0, r.invocationCount);
1907 <        checkCompletedNormally(g, v1);
1897 >        final SubtractAction r1 = new SubtractAction(m);
1898 >        final SubtractAction r2 = new SubtractAction(m);
1899 >        final SubtractAction r3 = new SubtractAction(m);
1900 >
1901 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1902 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1903 >        final Callable<Boolean> complete1 = failFirst ?
1904 >            () -> fst.cancel(mayInterruptIfRunning) :
1905 >            () -> fst.complete(v1);
1906 >        final Callable<Boolean> complete2 = failFirst ?
1907 >            () -> snd.complete(v1) :
1908 >            () -> snd.cancel(mayInterruptIfRunning);
1909 >
1910 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1911 >        assertTrue(complete1.call());
1912 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1913 >        checkIncomplete(h1);
1914 >        checkIncomplete(h2);
1915 >        assertTrue(complete2.call());
1916 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1917 >
1918 >        checkCompletedWithWrappedCancellationException(h1);
1919 >        checkCompletedWithWrappedCancellationException(h2);
1920 >        checkCompletedWithWrappedCancellationException(h3);
1921 >        r1.assertNotInvoked();
1922 >        r2.assertNotInvoked();
1923 >        r3.assertNotInvoked();
1924 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1925 >        checkCancelled(failFirst ? fst : snd);
1926      }}
1927  
1928      /**
1929 <     * runAfterBoth result completes exceptionally if action does
1929 >     * thenAcceptBoth result completes exceptionally if action does
1930       */
1931 <    public void testRunAfterBoth_actionFailed1() {
1931 >    public void testThenAcceptBoth_actionFailed() {
1932          for (ExecutionMode m : ExecutionMode.values())
1933 +        for (boolean fFirst : new boolean[] { true, false })
1934          for (Integer v1 : new Integer[] { 1, null })
1935          for (Integer v2 : new Integer[] { 2, null })
1936      {
1937          final CompletableFuture<Integer> f = new CompletableFuture<>();
1938          final CompletableFuture<Integer> g = new CompletableFuture<>();
1939 <        final FailingNoop r = new FailingNoop();
1940 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1941 <
1942 <        f.complete(v1);
1943 <        checkIncomplete(h);
1944 <        g.complete(v2);
1945 <
1946 <        checkCompletedWithWrappedCFException(h);
1939 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1940 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1941 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1942 >
1943 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1944 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1945 >        final Integer w1 =  fFirst ? v1 : v2;
1946 >        final Integer w2 = !fFirst ? v1 : v2;
1947 >
1948 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1949 >        assertTrue(fst.complete(w1));
1950 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1951 >        assertTrue(snd.complete(w2));
1952 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1953 >
1954 >        checkCompletedWithWrappedException(h1, r1.ex);
1955 >        checkCompletedWithWrappedException(h2, r2.ex);
1956 >        checkCompletedWithWrappedException(h3, r3.ex);
1957 >        r1.assertInvoked();
1958 >        r2.assertInvoked();
1959 >        r3.assertInvoked();
1960          checkCompletedNormally(f, v1);
1961          checkCompletedNormally(g, v2);
1962      }}
1963  
1964 <    public void testRunAfterBoth_actionFailed2() {
1964 >    /**
1965 >     * runAfterBoth result completes normally after normal
1966 >     * completion of sources
1967 >     */
1968 >    public void testRunAfterBoth_normalCompletion() {
1969          for (ExecutionMode m : ExecutionMode.values())
1970 +        for (boolean fFirst : new boolean[] { true, false })
1971          for (Integer v1 : new Integer[] { 1, null })
1972          for (Integer v2 : new Integer[] { 2, null })
1973      {
1974          final CompletableFuture<Integer> f = new CompletableFuture<>();
1975          final CompletableFuture<Integer> g = new CompletableFuture<>();
1976 <        final FailingNoop r = new FailingNoop();
1977 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1978 <
1979 <        g.complete(v2);
1980 <        checkIncomplete(h);
1981 <        f.complete(v1);
1982 <
1983 <        checkCompletedWithWrappedCFException(h);
1976 >        final Noop r1 = new Noop(m);
1977 >        final Noop r2 = new Noop(m);
1978 >        final Noop r3 = new Noop(m);
1979 >
1980 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1981 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1982 >        final Integer w1 =  fFirst ? v1 : v2;
1983 >        final Integer w2 = !fFirst ? v1 : v2;
1984 >
1985 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1986 >        assertTrue(fst.complete(w1));
1987 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1988 >        checkIncomplete(h1);
1989 >        checkIncomplete(h2);
1990 >        r1.assertNotInvoked();
1991 >        r2.assertNotInvoked();
1992 >        assertTrue(snd.complete(w2));
1993 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1994 >
1995 >        checkCompletedNormally(h1, null);
1996 >        checkCompletedNormally(h2, null);
1997 >        checkCompletedNormally(h3, null);
1998 >        r1.assertInvoked();
1999 >        r2.assertInvoked();
2000 >        r3.assertInvoked();
2001          checkCompletedNormally(f, v1);
2002          checkCompletedNormally(g, v2);
2003      }}
2004  
2005      /**
2006 <     * runAfterBoth result completes exceptionally if either source cancelled
2006 >     * runAfterBoth result completes exceptionally after exceptional
2007 >     * completion of either source
2008       */
2009 <    public void testRunAfterBoth_sourceCancelled1() {
1868 <        for (ExecutionMode m : ExecutionMode.values())
1869 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1870 <        for (Integer v1 : new Integer[] { 1, null })
1871 <    {
1872 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1873 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1874 <        final Noop r = new Noop();
1875 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1876 <
1877 <        assertTrue(f.cancel(mayInterruptIfRunning));
1878 <        checkIncomplete(h);
1879 <        g.complete(v1);
1880 <
1881 <        checkCompletedWithWrappedCancellationException(h);
1882 <        checkCancelled(f);
1883 <        assertEquals(0, r.invocationCount);
1884 <        checkCompletedNormally(g, v1);
1885 <    }}
1886 <
1887 <    public void testRunAfterBoth_sourceCancelled2() {
1888 <        for (ExecutionMode m : ExecutionMode.values())
1889 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1890 <        for (Integer v1 : new Integer[] { 1, null })
1891 <    {
1892 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1893 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1894 <        final Noop r = new Noop();
1895 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1896 <
1897 <        assertTrue(g.cancel(mayInterruptIfRunning));
1898 <        checkIncomplete(h);
1899 <        f.complete(v1);
1900 <
1901 <        checkCompletedWithWrappedCancellationException(h);
1902 <        checkCancelled(g);
1903 <        assertEquals(0, r.invocationCount);
1904 <        checkCompletedNormally(f, v1);
1905 <    }}
1906 <
1907 <    public void testRunAfterBoth_sourceCancelled3() {
2009 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2010          for (ExecutionMode m : ExecutionMode.values())
2011 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2011 >        for (boolean fFirst : new boolean[] { true, false })
2012 >        for (boolean failFirst : new boolean[] { true, false })
2013          for (Integer v1 : new Integer[] { 1, null })
2014      {
2015          final CompletableFuture<Integer> f = new CompletableFuture<>();
2016          final CompletableFuture<Integer> g = new CompletableFuture<>();
2017 <        final Noop r = new Noop();
2018 <
2019 <        assertTrue(g.cancel(mayInterruptIfRunning));
2020 <        f.complete(v1);
2021 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2022 <
2023 <        checkCompletedWithWrappedCancellationException(h);
2024 <        checkCancelled(g);
2025 <        assertEquals(0, r.invocationCount);
2026 <        checkCompletedNormally(f, v1);
2017 >        final CFException ex = new CFException();
2018 >        final Noop r1 = new Noop(m);
2019 >        final Noop r2 = new Noop(m);
2020 >        final Noop r3 = new Noop(m);
2021 >
2022 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2023 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2024 >        final Callable<Boolean> complete1 = failFirst ?
2025 >            () -> fst.completeExceptionally(ex) :
2026 >            () -> fst.complete(v1);
2027 >        final Callable<Boolean> complete2 = failFirst ?
2028 >            () -> snd.complete(v1) :
2029 >            () -> snd.completeExceptionally(ex);
2030 >
2031 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2032 >        assertTrue(complete1.call());
2033 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2034 >        checkIncomplete(h1);
2035 >        checkIncomplete(h2);
2036 >        assertTrue(complete2.call());
2037 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2038 >
2039 >        checkCompletedWithWrappedException(h1, ex);
2040 >        checkCompletedWithWrappedException(h2, ex);
2041 >        checkCompletedWithWrappedException(h3, ex);
2042 >        r1.assertNotInvoked();
2043 >        r2.assertNotInvoked();
2044 >        r3.assertNotInvoked();
2045 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2046 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2047      }}
2048  
2049 <    public void testRunAfterBoth_sourceCancelled4() {
2049 >    /**
2050 >     * runAfterBoth result completes exceptionally if either source cancelled
2051 >     */
2052 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2053          for (ExecutionMode m : ExecutionMode.values())
2054          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2055 +        for (boolean fFirst : new boolean[] { true, false })
2056 +        for (boolean failFirst : new boolean[] { true, false })
2057          for (Integer v1 : new Integer[] { 1, null })
2058      {
2059          final CompletableFuture<Integer> f = new CompletableFuture<>();
2060          final CompletableFuture<Integer> g = new CompletableFuture<>();
2061 <        final Noop r = new Noop();
2062 <
2063 <        assertTrue(f.cancel(mayInterruptIfRunning));
2064 <        g.complete(v1);
2065 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2066 <
2067 <        checkCompletedWithWrappedCancellationException(h);
2068 <        checkCancelled(f);
2069 <        assertEquals(0, r.invocationCount);
2070 <        checkCompletedNormally(g, v1);
2061 >        final Noop r1 = new Noop(m);
2062 >        final Noop r2 = new Noop(m);
2063 >        final Noop r3 = new Noop(m);
2064 >
2065 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2066 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2067 >        final Callable<Boolean> complete1 = failFirst ?
2068 >            () -> fst.cancel(mayInterruptIfRunning) :
2069 >            () -> fst.complete(v1);
2070 >        final Callable<Boolean> complete2 = failFirst ?
2071 >            () -> snd.complete(v1) :
2072 >            () -> snd.cancel(mayInterruptIfRunning);
2073 >
2074 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2075 >        assertTrue(complete1.call());
2076 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2077 >        checkIncomplete(h1);
2078 >        checkIncomplete(h2);
2079 >        assertTrue(complete2.call());
2080 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2081 >
2082 >        checkCompletedWithWrappedCancellationException(h1);
2083 >        checkCompletedWithWrappedCancellationException(h2);
2084 >        checkCompletedWithWrappedCancellationException(h3);
2085 >        r1.assertNotInvoked();
2086 >        r2.assertNotInvoked();
2087 >        r3.assertNotInvoked();
2088 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2089 >        checkCancelled(failFirst ? fst : snd);
2090      }}
2091  
2092      /**
2093 <     * applyToEither result completes normally after normal completion
1947 <     * of either source
2093 >     * runAfterBoth result completes exceptionally if action does
2094       */
2095 <    public void testApplyToEither_normalCompletion1() {
2095 >    public void testRunAfterBoth_actionFailed() {
2096          for (ExecutionMode m : ExecutionMode.values())
2097 +        for (boolean fFirst : new boolean[] { true, false })
2098          for (Integer v1 : new Integer[] { 1, null })
2099          for (Integer v2 : new Integer[] { 2, null })
2100      {
2101          final CompletableFuture<Integer> f = new CompletableFuture<>();
2102          final CompletableFuture<Integer> g = new CompletableFuture<>();
2103 <        final IncFunction r = new IncFunction();
2104 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2105 <
2106 <        f.complete(v1);
2107 <        checkCompletedNormally(h, inc(v1));
2108 <        g.complete(v2);
2109 <
2103 >        final FailingRunnable r1 = new FailingRunnable(m);
2104 >        final FailingRunnable r2 = new FailingRunnable(m);
2105 >        final FailingRunnable r3 = new FailingRunnable(m);
2106 >
2107 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2108 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2109 >        final Integer w1 =  fFirst ? v1 : v2;
2110 >        final Integer w2 = !fFirst ? v1 : v2;
2111 >
2112 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2113 >        assertTrue(fst.complete(w1));
2114 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2115 >        assertTrue(snd.complete(w2));
2116 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2117 >
2118 >        checkCompletedWithWrappedException(h1, r1.ex);
2119 >        checkCompletedWithWrappedException(h2, r2.ex);
2120 >        checkCompletedWithWrappedException(h3, r3.ex);
2121 >        r1.assertInvoked();
2122 >        r2.assertInvoked();
2123 >        r3.assertInvoked();
2124          checkCompletedNormally(f, v1);
2125          checkCompletedNormally(g, v2);
1965        checkCompletedNormally(h, inc(v1));
2126      }}
2127  
2128 <    public void testApplyToEither_normalCompletion2() {
2128 >    /**
2129 >     * applyToEither result completes normally after normal completion
2130 >     * of either source
2131 >     */
2132 >    public void testApplyToEither_normalCompletion() {
2133          for (ExecutionMode m : ExecutionMode.values())
2134          for (Integer v1 : new Integer[] { 1, null })
2135          for (Integer v2 : new Integer[] { 2, null })
2136      {
2137          final CompletableFuture<Integer> f = new CompletableFuture<>();
2138          final CompletableFuture<Integer> g = new CompletableFuture<>();
2139 <        final IncFunction r = new IncFunction();
2140 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2139 >        final IncFunction[] rs = new IncFunction[6];
2140 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2141  
2142 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2143 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2144 +        checkIncomplete(h0);
2145 +        checkIncomplete(h1);
2146 +        rs[0].assertNotInvoked();
2147 +        rs[1].assertNotInvoked();
2148 +        f.complete(v1);
2149 +        checkCompletedNormally(h0, inc(v1));
2150 +        checkCompletedNormally(h1, inc(v1));
2151 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2152 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2153 +        checkCompletedNormally(h2, inc(v1));
2154 +        checkCompletedNormally(h3, inc(v1));
2155          g.complete(v2);
1979        checkCompletedNormally(h, inc(v2));
1980        f.complete(v1);
2156  
2157 <        checkCompletedNormally(f, v1);
2158 <        checkCompletedNormally(g, v2);
2159 <        checkCompletedNormally(h, inc(v2));
2160 <        }}
2161 <
2162 <    public void testApplyToEither_normalCompletion3() {
2163 <        for (ExecutionMode m : ExecutionMode.values())
2164 <        for (Integer v1 : new Integer[] { 1, null })
2165 <        for (Integer v2 : new Integer[] { 2, null })
1991 <    {
1992 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1993 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1994 <        final IncFunction r = new IncFunction();
1995 <
1996 <        f.complete(v1);
1997 <        g.complete(v2);
1998 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2157 >        // unspecified behavior - both source completions available
2158 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2159 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2160 >        rs[4].assertValue(h4.join());
2161 >        rs[5].assertValue(h5.join());
2162 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2163 >                   Objects.equals(inc(v2), h4.join()));
2164 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2165 >                   Objects.equals(inc(v2), h5.join()));
2166  
2167          checkCompletedNormally(f, v1);
2168          checkCompletedNormally(g, v2);
2169 <
2170 <        // unspecified behavior
2171 <        assertTrue(Objects.equals(h.join(), inc(v1)) ||
2172 <                   Objects.equals(h.join(), inc(v2)));
2173 <        assertEquals(1, r.invocationCount);
2169 >        checkCompletedNormally(h0, inc(v1));
2170 >        checkCompletedNormally(h1, inc(v1));
2171 >        checkCompletedNormally(h2, inc(v1));
2172 >        checkCompletedNormally(h3, inc(v1));
2173 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2174      }}
2175  
2176      /**
2177       * applyToEither result completes exceptionally after exceptional
2178       * completion of either source
2179       */
2180 <    public void testApplyToEither_exceptionalCompletion1() {
2180 >    public void testApplyToEither_exceptionalCompletion() {
2181          for (ExecutionMode m : ExecutionMode.values())
2182          for (Integer v1 : new Integer[] { 1, null })
2183      {
2184          final CompletableFuture<Integer> f = new CompletableFuture<>();
2185          final CompletableFuture<Integer> g = new CompletableFuture<>();
2019        final IncFunction r = new IncFunction();
2020        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2186          final CFException ex = new CFException();
2187 +        final IncFunction[] rs = new IncFunction[6];
2188 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2189  
2190 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2191 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2192 +        checkIncomplete(h0);
2193 +        checkIncomplete(h1);
2194 +        rs[0].assertNotInvoked();
2195 +        rs[1].assertNotInvoked();
2196          f.completeExceptionally(ex);
2197 <        checkCompletedWithWrappedCFException(h, ex);
2197 >        checkCompletedWithWrappedException(h0, ex);
2198 >        checkCompletedWithWrappedException(h1, ex);
2199 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2200 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2201 >        checkCompletedWithWrappedException(h2, ex);
2202 >        checkCompletedWithWrappedException(h3, ex);
2203          g.complete(v1);
2204  
2205 <        assertEquals(0, r.invocationCount);
2205 >        // unspecified behavior - both source completions available
2206 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2207 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2208 >        try {
2209 >            assertEquals(inc(v1), h4.join());
2210 >            rs[4].assertValue(inc(v1));
2211 >        } catch (CompletionException ok) {
2212 >            checkCompletedWithWrappedException(h4, ex);
2213 >            rs[4].assertNotInvoked();
2214 >        }
2215 >        try {
2216 >            assertEquals(inc(v1), h5.join());
2217 >            rs[5].assertValue(inc(v1));
2218 >        } catch (CompletionException ok) {
2219 >            checkCompletedWithWrappedException(h5, ex);
2220 >            rs[5].assertNotInvoked();
2221 >        }
2222 >
2223 >        checkCompletedExceptionally(f, ex);
2224          checkCompletedNormally(g, v1);
2225 <        checkCompletedWithWrappedCFException(f, ex);
2226 <        checkCompletedWithWrappedCFException(h, ex);
2225 >        checkCompletedWithWrappedException(h0, ex);
2226 >        checkCompletedWithWrappedException(h1, ex);
2227 >        checkCompletedWithWrappedException(h2, ex);
2228 >        checkCompletedWithWrappedException(h3, ex);
2229 >        checkCompletedWithWrappedException(h4, ex);
2230 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2231      }}
2232  
2233      public void testApplyToEither_exceptionalCompletion2() {
2234          for (ExecutionMode m : ExecutionMode.values())
2235 +        for (boolean fFirst : new boolean[] { true, false })
2236          for (Integer v1 : new Integer[] { 1, null })
2237      {
2238          final CompletableFuture<Integer> f = new CompletableFuture<>();
2239          final CompletableFuture<Integer> g = new CompletableFuture<>();
2039        final IncFunction r = new IncFunction();
2040        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2041        final CFException ex = new CFException();
2042
2043        g.completeExceptionally(ex);
2044        checkCompletedWithWrappedCFException(h, ex);
2045        f.complete(v1);
2046
2047        assertEquals(0, r.invocationCount);
2048        checkCompletedNormally(f, v1);
2049        checkCompletedWithWrappedCFException(g, ex);
2050        checkCompletedWithWrappedCFException(h, ex);
2051    }}
2052
2053    public void testApplyToEither_exceptionalCompletion3() {
2054        for (ExecutionMode m : ExecutionMode.values())
2055        for (Integer v1 : new Integer[] { 1, null })
2056    {
2057        final CompletableFuture<Integer> f = new CompletableFuture<>();
2058        final CompletableFuture<Integer> g = new CompletableFuture<>();
2059        final IncFunction r = new IncFunction();
2240          final CFException ex = new CFException();
2241 +        final IncFunction[] rs = new IncFunction[6];
2242 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2243  
2244 <        g.completeExceptionally(ex);
2245 <        f.complete(v1);
2246 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2244 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2245 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2246 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2247 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2248 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2249 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2250  
2251 <        // unspecified behavior
2067 <        Integer v;
2251 >        // unspecified behavior - both source completions available
2252          try {
2253 <            assertEquals(inc(v1), h.join());
2254 <            assertEquals(1, r.invocationCount);
2253 >            assertEquals(inc(v1), h0.join());
2254 >            rs[0].assertValue(inc(v1));
2255          } catch (CompletionException ok) {
2256 <            checkCompletedWithWrappedCFException(h, ex);
2257 <            assertEquals(0, r.invocationCount);
2256 >            checkCompletedWithWrappedException(h0, ex);
2257 >            rs[0].assertNotInvoked();
2258          }
2075
2076        checkCompletedWithWrappedCFException(g, ex);
2077        checkCompletedNormally(f, v1);
2078    }}
2079
2080    public void testApplyToEither_exceptionalCompletion4() {
2081        for (ExecutionMode m : ExecutionMode.values())
2082        for (Integer v1 : new Integer[] { 1, null })
2083    {
2084        final CompletableFuture<Integer> f = new CompletableFuture<>();
2085        final CompletableFuture<Integer> g = new CompletableFuture<>();
2086        final IncFunction r = new IncFunction();
2087        final CFException ex = new CFException();
2088
2089        f.completeExceptionally(ex);
2090        g.complete(v1);
2091        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2092
2093        // unspecified behavior
2094        Integer v;
2259          try {
2260 <            assertEquals(inc(v1), h.join());
2261 <            assertEquals(1, r.invocationCount);
2260 >            assertEquals(inc(v1), h1.join());
2261 >            rs[1].assertValue(inc(v1));
2262          } catch (CompletionException ok) {
2263 <            checkCompletedWithWrappedCFException(h, ex);
2264 <            assertEquals(0, r.invocationCount);
2263 >            checkCompletedWithWrappedException(h1, ex);
2264 >            rs[1].assertNotInvoked();
2265 >        }
2266 >        try {
2267 >            assertEquals(inc(v1), h2.join());
2268 >            rs[2].assertValue(inc(v1));
2269 >        } catch (CompletionException ok) {
2270 >            checkCompletedWithWrappedException(h2, ex);
2271 >            rs[2].assertNotInvoked();
2272 >        }
2273 >        try {
2274 >            assertEquals(inc(v1), h3.join());
2275 >            rs[3].assertValue(inc(v1));
2276 >        } catch (CompletionException ok) {
2277 >            checkCompletedWithWrappedException(h3, ex);
2278 >            rs[3].assertNotInvoked();
2279          }
2280  
2103        checkCompletedWithWrappedCFException(f, ex);
2104        checkCompletedNormally(g, v1);
2105    }}
2106
2107    /**
2108     * applyToEither result completes exceptionally if action does
2109     */
2110    public void testApplyToEither_actionFailed1() {
2111        for (ExecutionMode m : ExecutionMode.values())
2112        for (Integer v1 : new Integer[] { 1, null })
2113        for (Integer v2 : new Integer[] { 2, null })
2114    {
2115        final CompletableFuture<Integer> f = new CompletableFuture<>();
2116        final CompletableFuture<Integer> g = new CompletableFuture<>();
2117        final FailingFunction r = new FailingFunction();
2118        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2119
2120        f.complete(v1);
2121        checkCompletedWithWrappedCFException(h);
2122        g.complete(v2);
2123        checkCompletedNormally(f, v1);
2124        checkCompletedNormally(g, v2);
2125    }}
2126
2127    public void testApplyToEither_actionFailed2() {
2128        for (ExecutionMode m : ExecutionMode.values())
2129        for (Integer v1 : new Integer[] { 1, null })
2130        for (Integer v2 : new Integer[] { 2, null })
2131    {
2132        final CompletableFuture<Integer> f = new CompletableFuture<>();
2133        final CompletableFuture<Integer> g = new CompletableFuture<>();
2134        final FailingFunction r = new FailingFunction();
2135        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2136
2137        g.complete(v2);
2138        checkCompletedWithWrappedCFException(h);
2139        f.complete(v1);
2281          checkCompletedNormally(f, v1);
2282 <        checkCompletedNormally(g, v2);
2282 >        checkCompletedExceptionally(g, ex);
2283      }}
2284  
2285      /**
2286       * applyToEither result completes exceptionally if either source cancelled
2287       */
2288 <    public void testApplyToEither_sourceCancelled1() {
2288 >    public void testApplyToEither_sourceCancelled() {
2289          for (ExecutionMode m : ExecutionMode.values())
2290          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2291          for (Integer v1 : new Integer[] { 1, null })
2292      {
2293          final CompletableFuture<Integer> f = new CompletableFuture<>();
2294          final CompletableFuture<Integer> g = new CompletableFuture<>();
2295 <        final IncFunction r = new IncFunction();
2296 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2295 >        final IncFunction[] rs = new IncFunction[6];
2296 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2297  
2298 <        assertTrue(f.cancel(mayInterruptIfRunning));
2299 <        checkCompletedWithWrappedCancellationException(h);
2298 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2299 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2300 >        checkIncomplete(h0);
2301 >        checkIncomplete(h1);
2302 >        rs[0].assertNotInvoked();
2303 >        rs[1].assertNotInvoked();
2304 >        f.cancel(mayInterruptIfRunning);
2305 >        checkCompletedWithWrappedCancellationException(h0);
2306 >        checkCompletedWithWrappedCancellationException(h1);
2307 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2308 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2309 >        checkCompletedWithWrappedCancellationException(h2);
2310 >        checkCompletedWithWrappedCancellationException(h3);
2311          g.complete(v1);
2312  
2313 +        // unspecified behavior - both source completions available
2314 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2315 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2316 +        try {
2317 +            assertEquals(inc(v1), h4.join());
2318 +            rs[4].assertValue(inc(v1));
2319 +        } catch (CompletionException ok) {
2320 +            checkCompletedWithWrappedCancellationException(h4);
2321 +            rs[4].assertNotInvoked();
2322 +        }
2323 +        try {
2324 +            assertEquals(inc(v1), h5.join());
2325 +            rs[5].assertValue(inc(v1));
2326 +        } catch (CompletionException ok) {
2327 +            checkCompletedWithWrappedCancellationException(h5);
2328 +            rs[5].assertNotInvoked();
2329 +        }
2330 +
2331          checkCancelled(f);
2162        assertEquals(0, r.invocationCount);
2332          checkCompletedNormally(g, v1);
2333 <        checkCompletedWithWrappedCancellationException(h);
2333 >        checkCompletedWithWrappedCancellationException(h0);
2334 >        checkCompletedWithWrappedCancellationException(h1);
2335 >        checkCompletedWithWrappedCancellationException(h2);
2336 >        checkCompletedWithWrappedCancellationException(h3);
2337 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2338      }}
2339  
2340      public void testApplyToEither_sourceCancelled2() {
2341          for (ExecutionMode m : ExecutionMode.values())
2342          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2343 +        for (boolean fFirst : new boolean[] { true, false })
2344          for (Integer v1 : new Integer[] { 1, null })
2345      {
2346          final CompletableFuture<Integer> f = new CompletableFuture<>();
2347          final CompletableFuture<Integer> g = new CompletableFuture<>();
2348 <        final IncFunction r = new IncFunction();
2349 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2176 <
2177 <        assertTrue(g.cancel(mayInterruptIfRunning));
2178 <        checkCompletedWithWrappedCancellationException(h);
2179 <        f.complete(v1);
2180 <
2181 <        checkCancelled(g);
2182 <        assertEquals(0, r.invocationCount);
2183 <        checkCompletedNormally(f, v1);
2184 <        checkCompletedWithWrappedCancellationException(h);
2185 <    }}
2186 <
2187 <    public void testApplyToEither_sourceCancelled3() {
2188 <        for (ExecutionMode m : ExecutionMode.values())
2189 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2190 <        for (Integer v1 : new Integer[] { 1, null })
2191 <    {
2192 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2193 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2194 <        final IncFunction r = new IncFunction();
2348 >        final IncFunction[] rs = new IncFunction[6];
2349 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2350  
2351 <        assertTrue(g.cancel(mayInterruptIfRunning));
2352 <        f.complete(v1);
2353 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2351 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2352 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2353 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2354 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2355 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2356 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2357  
2358 <        // unspecified behavior
2201 <        Integer v;
2358 >        // unspecified behavior - both source completions available
2359          try {
2360 <            assertEquals(inc(v1), h.join());
2361 <            assertEquals(1, r.invocationCount);
2360 >            assertEquals(inc(v1), h0.join());
2361 >            rs[0].assertValue(inc(v1));
2362          } catch (CompletionException ok) {
2363 <            checkCompletedWithWrappedCancellationException(h);
2364 <            assertEquals(0, r.invocationCount);
2363 >            checkCompletedWithWrappedCancellationException(h0);
2364 >            rs[0].assertNotInvoked();
2365 >        }
2366 >        try {
2367 >            assertEquals(inc(v1), h1.join());
2368 >            rs[1].assertValue(inc(v1));
2369 >        } catch (CompletionException ok) {
2370 >            checkCompletedWithWrappedCancellationException(h1);
2371 >            rs[1].assertNotInvoked();
2372          }
2209
2210        checkCancelled(g);
2211        checkCompletedNormally(f, v1);
2212    }}
2213
2214    public void testApplyToEither_sourceCancelled4() {
2215        for (ExecutionMode m : ExecutionMode.values())
2216        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2217        for (Integer v1 : new Integer[] { 1, null })
2218    {
2219        final CompletableFuture<Integer> f = new CompletableFuture<>();
2220        final CompletableFuture<Integer> g = new CompletableFuture<>();
2221        final IncFunction r = new IncFunction();
2222
2223        assertTrue(f.cancel(mayInterruptIfRunning));
2224        g.complete(v1);
2225        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2226
2227        // unspecified behavior
2228        Integer v;
2373          try {
2374 <            assertEquals(inc(v1), h.join());
2375 <            assertEquals(1, r.invocationCount);
2374 >            assertEquals(inc(v1), h2.join());
2375 >            rs[2].assertValue(inc(v1));
2376          } catch (CompletionException ok) {
2377 <            checkCompletedWithWrappedCancellationException(h);
2378 <            assertEquals(0, r.invocationCount);
2377 >            checkCompletedWithWrappedCancellationException(h2);
2378 >            rs[2].assertNotInvoked();
2379 >        }
2380 >        try {
2381 >            assertEquals(inc(v1), h3.join());
2382 >            rs[3].assertValue(inc(v1));
2383 >        } catch (CompletionException ok) {
2384 >            checkCompletedWithWrappedCancellationException(h3);
2385 >            rs[3].assertNotInvoked();
2386          }
2387  
2388 <        checkCancelled(f);
2389 <        checkCompletedNormally(g, v1);
2388 >        checkCompletedNormally(f, v1);
2389 >        checkCancelled(g);
2390      }}
2391  
2392      /**
2393 <     * acceptEither result completes normally after normal completion
2243 <     * of either source
2393 >     * applyToEither result completes exceptionally if action does
2394       */
2395 <    public void testAcceptEither_normalCompletion1() {
2395 >    public void testApplyToEither_actionFailed() {
2396          for (ExecutionMode m : ExecutionMode.values())
2397          for (Integer v1 : new Integer[] { 1, null })
2398          for (Integer v2 : new Integer[] { 2, null })
2399      {
2400          final CompletableFuture<Integer> f = new CompletableFuture<>();
2401          final CompletableFuture<Integer> g = new CompletableFuture<>();
2402 <        final IncAction r = new IncAction();
2403 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2402 >        final FailingFunction[] rs = new FailingFunction[6];
2403 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2404  
2405 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2406 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2407          f.complete(v1);
2408 <        checkCompletedNormally(h, null);
2409 <        assertEquals(inc(v1), r.value);
2410 <        g.complete(v2);
2411 <
2412 <        checkCompletedNormally(f, v1);
2413 <        checkCompletedNormally(g, v2);
2414 <        checkCompletedNormally(h, null);
2263 <    }}
2264 <
2265 <    public void testAcceptEither_normalCompletion2() {
2266 <        for (ExecutionMode m : ExecutionMode.values())
2267 <        for (Integer v1 : new Integer[] { 1, null })
2268 <        for (Integer v2 : new Integer[] { 2, null })
2269 <    {
2270 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2271 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2272 <        final IncAction r = new IncAction();
2273 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2408 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2409 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2410 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2411 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2412 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2413 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2414 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2415  
2416          g.complete(v2);
2417 <        checkCompletedNormally(h, null);
2418 <        assertEquals(inc(v2), r.value);
2419 <        f.complete(v1);
2417 >
2418 >        // unspecified behavior - both source completions available
2419 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2420 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2421 >
2422 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2423 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2424 >                   Objects.equals(v2, rs[4].value));
2425 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2426 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2427 >                   Objects.equals(v2, rs[5].value));
2428  
2429          checkCompletedNormally(f, v1);
2430          checkCompletedNormally(g, v2);
2282        checkCompletedNormally(h, null);
2431      }}
2432  
2433 <    public void testAcceptEither_normalCompletion3() {
2433 >    /**
2434 >     * acceptEither result completes normally after normal completion
2435 >     * of either source
2436 >     */
2437 >    public void testAcceptEither_normalCompletion() {
2438          for (ExecutionMode m : ExecutionMode.values())
2439          for (Integer v1 : new Integer[] { 1, null })
2440          for (Integer v2 : new Integer[] { 2, null })
2441      {
2442          final CompletableFuture<Integer> f = new CompletableFuture<>();
2443          final CompletableFuture<Integer> g = new CompletableFuture<>();
2444 <        final IncAction r = new IncAction();
2444 >        final NoopConsumer[] rs = new NoopConsumer[6];
2445 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2446  
2447 <        f.complete(v1);
2447 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2448 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2449 >        checkIncomplete(h0);
2450 >        checkIncomplete(h1);
2451 >        rs[0].assertNotInvoked();
2452 >        rs[1].assertNotInvoked();
2453 >        f.complete(v1);
2454 >        checkCompletedNormally(h0, null);
2455 >        checkCompletedNormally(h1, null);
2456 >        rs[0].assertValue(v1);
2457 >        rs[1].assertValue(v1);
2458 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2459 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2460 >        checkCompletedNormally(h2, null);
2461 >        checkCompletedNormally(h3, null);
2462 >        rs[2].assertValue(v1);
2463 >        rs[3].assertValue(v1);
2464          g.complete(v2);
2296        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2465  
2466 <        checkCompletedNormally(h, null);
2466 >        // unspecified behavior - both source completions available
2467 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2468 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2469 >        checkCompletedNormally(h4, null);
2470 >        checkCompletedNormally(h5, null);
2471 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2472 >                   Objects.equals(v2, rs[4].value));
2473 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2474 >                   Objects.equals(v2, rs[5].value));
2475 >
2476          checkCompletedNormally(f, v1);
2477          checkCompletedNormally(g, v2);
2478 <
2479 <        // unspecified behavior
2480 <        assertTrue(Objects.equals(r.value, inc(v1)) ||
2481 <                   Objects.equals(r.value, inc(v2)));
2478 >        checkCompletedNormally(h0, null);
2479 >        checkCompletedNormally(h1, null);
2480 >        checkCompletedNormally(h2, null);
2481 >        checkCompletedNormally(h3, null);
2482 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2483      }}
2484  
2485      /**
2486       * acceptEither result completes exceptionally after exceptional
2487       * completion of either source
2488       */
2489 <    public void testAcceptEither_exceptionalCompletion1() {
2489 >    public void testAcceptEither_exceptionalCompletion() {
2490          for (ExecutionMode m : ExecutionMode.values())
2491          for (Integer v1 : new Integer[] { 1, null })
2492      {
2493          final CompletableFuture<Integer> f = new CompletableFuture<>();
2494          final CompletableFuture<Integer> g = new CompletableFuture<>();
2317        final IncAction r = new IncAction();
2318        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2495          final CFException ex = new CFException();
2496 +        final NoopConsumer[] rs = new NoopConsumer[6];
2497 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2498  
2499 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2500 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2501 +        checkIncomplete(h0);
2502 +        checkIncomplete(h1);
2503 +        rs[0].assertNotInvoked();
2504 +        rs[1].assertNotInvoked();
2505          f.completeExceptionally(ex);
2506 <        checkCompletedWithWrappedCFException(h, ex);
2506 >        checkCompletedWithWrappedException(h0, ex);
2507 >        checkCompletedWithWrappedException(h1, ex);
2508 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2509 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2510 >        checkCompletedWithWrappedException(h2, ex);
2511 >        checkCompletedWithWrappedException(h3, ex);
2512 >
2513          g.complete(v1);
2514  
2515 <        assertEquals(0, r.invocationCount);
2515 >        // unspecified behavior - both source completions available
2516 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2517 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2518 >        try {
2519 >            assertNull(h4.join());
2520 >            rs[4].assertValue(v1);
2521 >        } catch (CompletionException ok) {
2522 >            checkCompletedWithWrappedException(h4, ex);
2523 >            rs[4].assertNotInvoked();
2524 >        }
2525 >        try {
2526 >            assertNull(h5.join());
2527 >            rs[5].assertValue(v1);
2528 >        } catch (CompletionException ok) {
2529 >            checkCompletedWithWrappedException(h5, ex);
2530 >            rs[5].assertNotInvoked();
2531 >        }
2532 >
2533 >        checkCompletedExceptionally(f, ex);
2534          checkCompletedNormally(g, v1);
2535 <        checkCompletedWithWrappedCFException(f, ex);
2536 <        checkCompletedWithWrappedCFException(h, ex);
2535 >        checkCompletedWithWrappedException(h0, ex);
2536 >        checkCompletedWithWrappedException(h1, ex);
2537 >        checkCompletedWithWrappedException(h2, ex);
2538 >        checkCompletedWithWrappedException(h3, ex);
2539 >        checkCompletedWithWrappedException(h4, ex);
2540 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2541      }}
2542  
2543      public void testAcceptEither_exceptionalCompletion2() {
2544          for (ExecutionMode m : ExecutionMode.values())
2545 +        for (boolean fFirst : new boolean[] { true, false })
2546          for (Integer v1 : new Integer[] { 1, null })
2547      {
2548          final CompletableFuture<Integer> f = new CompletableFuture<>();
2549          final CompletableFuture<Integer> g = new CompletableFuture<>();
2337        final IncAction r = new IncAction();
2338        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2339        final CFException ex = new CFException();
2340
2341        g.completeExceptionally(ex);
2342        checkCompletedWithWrappedCFException(h, ex);
2343        f.complete(v1);
2344
2345        assertEquals(0, r.invocationCount);
2346        checkCompletedNormally(f, v1);
2347        checkCompletedWithWrappedCFException(g, ex);
2348        checkCompletedWithWrappedCFException(h, ex);
2349    }}
2350
2351    public void testAcceptEither_exceptionalCompletion3() {
2352        for (ExecutionMode m : ExecutionMode.values())
2353        for (Integer v1 : new Integer[] { 1, null })
2354    {
2355        final CompletableFuture<Integer> f = new CompletableFuture<>();
2356        final CompletableFuture<Integer> g = new CompletableFuture<>();
2357        final IncAction r = new IncAction();
2550          final CFException ex = new CFException();
2551 +        final NoopConsumer[] rs = new NoopConsumer[6];
2552 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2553  
2554 <        g.completeExceptionally(ex);
2555 <        f.complete(v1);
2556 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2554 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2555 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2556 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2557 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2558 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2559 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2560  
2561 <        // unspecified behavior
2365 <        Integer v;
2561 >        // unspecified behavior - both source completions available
2562          try {
2563 <            assertNull(h.join());
2564 <            assertEquals(1, r.invocationCount);
2369 <            assertEquals(inc(v1), r.value);
2563 >            assertNull(h0.join());
2564 >            rs[0].assertValue(v1);
2565          } catch (CompletionException ok) {
2566 <            checkCompletedWithWrappedCFException(h, ex);
2567 <            assertEquals(0, r.invocationCount);
2566 >            checkCompletedWithWrappedException(h0, ex);
2567 >            rs[0].assertNotInvoked();
2568          }
2374
2375        checkCompletedWithWrappedCFException(g, ex);
2376        checkCompletedNormally(f, v1);
2377    }}
2378
2379    public void testAcceptEither_exceptionalCompletion4() {
2380        for (ExecutionMode m : ExecutionMode.values())
2381        for (Integer v1 : new Integer[] { 1, null })
2382    {
2383        final CompletableFuture<Integer> f = new CompletableFuture<>();
2384        final CompletableFuture<Integer> g = new CompletableFuture<>();
2385        final IncAction r = new IncAction();
2386        final CFException ex = new CFException();
2387
2388        f.completeExceptionally(ex);
2389        g.complete(v1);
2390        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2391
2392        // unspecified behavior
2393        Integer v;
2569          try {
2570 <            assertNull(h.join());
2571 <            assertEquals(1, r.invocationCount);
2397 <            assertEquals(inc(v1), r.value);
2570 >            assertNull(h1.join());
2571 >            rs[1].assertValue(v1);
2572          } catch (CompletionException ok) {
2573 <            checkCompletedWithWrappedCFException(h, ex);
2574 <            assertEquals(0, r.invocationCount);
2573 >            checkCompletedWithWrappedException(h1, ex);
2574 >            rs[1].assertNotInvoked();
2575 >        }
2576 >        try {
2577 >            assertNull(h2.join());
2578 >            rs[2].assertValue(v1);
2579 >        } catch (CompletionException ok) {
2580 >            checkCompletedWithWrappedException(h2, ex);
2581 >            rs[2].assertNotInvoked();
2582 >        }
2583 >        try {
2584 >            assertNull(h3.join());
2585 >            rs[3].assertValue(v1);
2586 >        } catch (CompletionException ok) {
2587 >            checkCompletedWithWrappedException(h3, ex);
2588 >            rs[3].assertNotInvoked();
2589          }
2590  
2403        checkCompletedWithWrappedCFException(f, ex);
2404        checkCompletedNormally(g, v1);
2405    }}
2406
2407    /**
2408     * acceptEither result completes exceptionally if action does
2409     */
2410    public void testAcceptEither_actionFailed1() {
2411        for (ExecutionMode m : ExecutionMode.values())
2412        for (Integer v1 : new Integer[] { 1, null })
2413        for (Integer v2 : new Integer[] { 2, null })
2414    {
2415        final CompletableFuture<Integer> f = new CompletableFuture<>();
2416        final CompletableFuture<Integer> g = new CompletableFuture<>();
2417        final FailingConsumer r = new FailingConsumer();
2418        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2419
2420        f.complete(v1);
2421        checkCompletedWithWrappedCFException(h);
2422        g.complete(v2);
2423        checkCompletedNormally(f, v1);
2424        checkCompletedNormally(g, v2);
2425    }}
2426
2427    public void testAcceptEither_actionFailed2() {
2428        for (ExecutionMode m : ExecutionMode.values())
2429        for (Integer v1 : new Integer[] { 1, null })
2430        for (Integer v2 : new Integer[] { 2, null })
2431    {
2432        final CompletableFuture<Integer> f = new CompletableFuture<>();
2433        final CompletableFuture<Integer> g = new CompletableFuture<>();
2434        final FailingConsumer r = new FailingConsumer();
2435        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2436
2437        g.complete(v2);
2438        checkCompletedWithWrappedCFException(h);
2439        f.complete(v1);
2591          checkCompletedNormally(f, v1);
2592 <        checkCompletedNormally(g, v2);
2592 >        checkCompletedExceptionally(g, ex);
2593      }}
2594  
2595      /**
2596       * acceptEither result completes exceptionally if either source cancelled
2597       */
2598 <    public void testAcceptEither_sourceCancelled1() {
2448 <        for (ExecutionMode m : ExecutionMode.values())
2449 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2450 <        for (Integer v1 : new Integer[] { 1, null })
2451 <    {
2452 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2453 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2454 <        final IncAction r = new IncAction();
2455 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2456 <
2457 <        assertTrue(f.cancel(mayInterruptIfRunning));
2458 <        checkCompletedWithWrappedCancellationException(h);
2459 <        g.complete(v1);
2460 <
2461 <        checkCancelled(f);
2462 <        assertEquals(0, r.invocationCount);
2463 <        checkCompletedNormally(g, v1);
2464 <        checkCompletedWithWrappedCancellationException(h);
2465 <    }}
2466 <
2467 <    public void testAcceptEither_sourceCancelled2() {
2598 >    public void testAcceptEither_sourceCancelled() {
2599          for (ExecutionMode m : ExecutionMode.values())
2600          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2601          for (Integer v1 : new Integer[] { 1, null })
2602      {
2603          final CompletableFuture<Integer> f = new CompletableFuture<>();
2604          final CompletableFuture<Integer> g = new CompletableFuture<>();
2605 <        final IncAction r = new IncAction();
2606 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2605 >        final NoopConsumer[] rs = new NoopConsumer[6];
2606 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2607  
2608 <        assertTrue(g.cancel(mayInterruptIfRunning));
2609 <        checkCompletedWithWrappedCancellationException(h);
2610 <        f.complete(v1);
2608 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2609 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2610 >        checkIncomplete(h0);
2611 >        checkIncomplete(h1);
2612 >        rs[0].assertNotInvoked();
2613 >        rs[1].assertNotInvoked();
2614 >        f.cancel(mayInterruptIfRunning);
2615 >        checkCompletedWithWrappedCancellationException(h0);
2616 >        checkCompletedWithWrappedCancellationException(h1);
2617 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2618 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2619 >        checkCompletedWithWrappedCancellationException(h2);
2620 >        checkCompletedWithWrappedCancellationException(h3);
2621  
2622 <        checkCancelled(g);
2482 <        assertEquals(0, r.invocationCount);
2483 <        checkCompletedNormally(f, v1);
2484 <        checkCompletedWithWrappedCancellationException(h);
2485 <    }}
2486 <
2487 <    public void testAcceptEither_sourceCancelled3() {
2488 <        for (ExecutionMode m : ExecutionMode.values())
2489 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2490 <        for (Integer v1 : new Integer[] { 1, null })
2491 <    {
2492 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2493 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2494 <        final IncAction r = new IncAction();
2495 <
2496 <        assertTrue(g.cancel(mayInterruptIfRunning));
2497 <        f.complete(v1);
2498 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2622 >        g.complete(v1);
2623  
2624 <        // unspecified behavior
2625 <        Integer v;
2624 >        // unspecified behavior - both source completions available
2625 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2626 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2627          try {
2628 <            assertNull(h.join());
2629 <            assertEquals(1, r.invocationCount);
2505 <            assertEquals(inc(v1), r.value);
2628 >            assertNull(h4.join());
2629 >            rs[4].assertValue(v1);
2630          } catch (CompletionException ok) {
2631 <            checkCompletedWithWrappedCancellationException(h);
2632 <            assertEquals(0, r.invocationCount);
2631 >            checkCompletedWithWrappedCancellationException(h4);
2632 >            rs[4].assertNotInvoked();
2633          }
2510
2511        checkCancelled(g);
2512        checkCompletedNormally(f, v1);
2513    }}
2514
2515    public void testAcceptEither_sourceCancelled4() {
2516        for (ExecutionMode m : ExecutionMode.values())
2517        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2518        for (Integer v1 : new Integer[] { 1, null })
2519    {
2520        final CompletableFuture<Integer> f = new CompletableFuture<>();
2521        final CompletableFuture<Integer> g = new CompletableFuture<>();
2522        final IncAction r = new IncAction();
2523
2524        assertTrue(f.cancel(mayInterruptIfRunning));
2525        g.complete(v1);
2526        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2527
2528        // unspecified behavior
2529        Integer v;
2634          try {
2635 <            assertNull(h.join());
2636 <            assertEquals(1, r.invocationCount);
2533 <            assertEquals(inc(v1), r.value);
2635 >            assertNull(h5.join());
2636 >            rs[5].assertValue(v1);
2637          } catch (CompletionException ok) {
2638 <            checkCompletedWithWrappedCancellationException(h);
2639 <            assertEquals(0, r.invocationCount);
2638 >            checkCompletedWithWrappedCancellationException(h5);
2639 >            rs[5].assertNotInvoked();
2640          }
2641  
2642          checkCancelled(f);
2643          checkCompletedNormally(g, v1);
2644 +        checkCompletedWithWrappedCancellationException(h0);
2645 +        checkCompletedWithWrappedCancellationException(h1);
2646 +        checkCompletedWithWrappedCancellationException(h2);
2647 +        checkCompletedWithWrappedCancellationException(h3);
2648 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2649      }}
2650  
2651      /**
2652 <     * runAfterEither result completes normally after normal completion
2545 <     * of either source
2652 >     * acceptEither result completes exceptionally if action does
2653       */
2654 <    public void testRunAfterEither_normalCompletion1() {
2654 >    public void testAcceptEither_actionFailed() {
2655          for (ExecutionMode m : ExecutionMode.values())
2656          for (Integer v1 : new Integer[] { 1, null })
2657          for (Integer v2 : new Integer[] { 2, null })
2658      {
2659          final CompletableFuture<Integer> f = new CompletableFuture<>();
2660          final CompletableFuture<Integer> g = new CompletableFuture<>();
2661 <        final Noop r = new Noop();
2662 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2661 >        final FailingConsumer[] rs = new FailingConsumer[6];
2662 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2663  
2664 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2665 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2666          f.complete(v1);
2667 <        checkCompletedNormally(h, null);
2668 <        assertEquals(1, r.invocationCount);
2667 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2668 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2669 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2670 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2671 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2672 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2673 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2674 >
2675          g.complete(v2);
2676  
2677 +        // unspecified behavior - both source completions available
2678 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2679 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2680 +
2681 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2682 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2683 +                   Objects.equals(v2, rs[4].value));
2684 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2685 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2686 +                   Objects.equals(v2, rs[5].value));
2687 +
2688          checkCompletedNormally(f, v1);
2689          checkCompletedNormally(g, v2);
2564        checkCompletedNormally(h, null);
2565        assertEquals(1, r.invocationCount);
2690      }}
2691  
2692 <    public void testRunAfterEither_normalCompletion2() {
2692 >    /**
2693 >     * runAfterEither result completes normally after normal completion
2694 >     * of either source
2695 >     */
2696 >    public void testRunAfterEither_normalCompletion() {
2697          for (ExecutionMode m : ExecutionMode.values())
2698          for (Integer v1 : new Integer[] { 1, null })
2699          for (Integer v2 : new Integer[] { 2, null })
2700 +        for (boolean pushNop : new boolean[] { true, false })
2701      {
2702          final CompletableFuture<Integer> f = new CompletableFuture<>();
2703          final CompletableFuture<Integer> g = new CompletableFuture<>();
2704 <        final Noop r = new Noop();
2705 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2704 >        final Noop[] rs = new Noop[6];
2705 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2706  
2707 <        g.complete(v2);
2708 <        checkCompletedNormally(h, null);
2709 <        assertEquals(1, r.invocationCount);
2707 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2708 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2709 >        checkIncomplete(h0);
2710 >        checkIncomplete(h1);
2711 >        rs[0].assertNotInvoked();
2712 >        rs[1].assertNotInvoked();
2713 >        if (pushNop) {          // ad hoc test of intra-completion interference
2714 >            m.thenRun(f, () -> {});
2715 >            m.thenRun(g, () -> {});
2716 >        }
2717          f.complete(v1);
2718 +        checkCompletedNormally(h0, null);
2719 +        checkCompletedNormally(h1, null);
2720 +        rs[0].assertInvoked();
2721 +        rs[1].assertInvoked();
2722 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2723 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2724 +        checkCompletedNormally(h2, null);
2725 +        checkCompletedNormally(h3, null);
2726 +        rs[2].assertInvoked();
2727 +        rs[3].assertInvoked();
2728  
2583        checkCompletedNormally(f, v1);
2584        checkCompletedNormally(g, v2);
2585        checkCompletedNormally(h, null);
2586        assertEquals(1, r.invocationCount);
2587        }}
2588
2589    public void testRunAfterEither_normalCompletion3() {
2590        for (ExecutionMode m : ExecutionMode.values())
2591        for (Integer v1 : new Integer[] { 1, null })
2592        for (Integer v2 : new Integer[] { 2, null })
2593    {
2594        final CompletableFuture<Integer> f = new CompletableFuture<>();
2595        final CompletableFuture<Integer> g = new CompletableFuture<>();
2596        final Noop r = new Noop();
2597
2598        f.complete(v1);
2729          g.complete(v2);
2600        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2730  
2731 <        checkCompletedNormally(h, null);
2731 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2732 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2733 >
2734          checkCompletedNormally(f, v1);
2735          checkCompletedNormally(g, v2);
2736 <        assertEquals(1, r.invocationCount);
2736 >        checkCompletedNormally(h0, null);
2737 >        checkCompletedNormally(h1, null);
2738 >        checkCompletedNormally(h2, null);
2739 >        checkCompletedNormally(h3, null);
2740 >        checkCompletedNormally(h4, null);
2741 >        checkCompletedNormally(h5, null);
2742 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2743      }}
2744  
2745      /**
2746       * runAfterEither result completes exceptionally after exceptional
2747       * completion of either source
2748       */
2749 <    public void testRunAfterEither_exceptionalCompletion1() {
2749 >    public void testRunAfterEither_exceptionalCompletion() {
2750          for (ExecutionMode m : ExecutionMode.values())
2751          for (Integer v1 : new Integer[] { 1, null })
2752      {
2753          final CompletableFuture<Integer> f = new CompletableFuture<>();
2754          final CompletableFuture<Integer> g = new CompletableFuture<>();
2618        final Noop r = new Noop();
2619        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2755          final CFException ex = new CFException();
2756 +        final Noop[] rs = new Noop[6];
2757 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2758  
2759 <        f.completeExceptionally(ex);
2760 <        checkCompletedWithWrappedCFException(h, ex);
2761 <        g.complete(v1);
2759 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2760 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2761 >        checkIncomplete(h0);
2762 >        checkIncomplete(h1);
2763 >        rs[0].assertNotInvoked();
2764 >        rs[1].assertNotInvoked();
2765 >        assertTrue(f.completeExceptionally(ex));
2766 >        checkCompletedWithWrappedException(h0, ex);
2767 >        checkCompletedWithWrappedException(h1, ex);
2768 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2769 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2770 >        checkCompletedWithWrappedException(h2, ex);
2771 >        checkCompletedWithWrappedException(h3, ex);
2772 >
2773 >        assertTrue(g.complete(v1));
2774 >
2775 >        // unspecified behavior - both source completions available
2776 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2777 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2778 >        try {
2779 >            assertNull(h4.join());
2780 >            rs[4].assertInvoked();
2781 >        } catch (CompletionException ok) {
2782 >            checkCompletedWithWrappedException(h4, ex);
2783 >            rs[4].assertNotInvoked();
2784 >        }
2785 >        try {
2786 >            assertNull(h5.join());
2787 >            rs[5].assertInvoked();
2788 >        } catch (CompletionException ok) {
2789 >            checkCompletedWithWrappedException(h5, ex);
2790 >            rs[5].assertNotInvoked();
2791 >        }
2792  
2793 <        assertEquals(0, r.invocationCount);
2793 >        checkCompletedExceptionally(f, ex);
2794          checkCompletedNormally(g, v1);
2795 <        checkCompletedWithWrappedCFException(f, ex);
2796 <        checkCompletedWithWrappedCFException(h, ex);
2795 >        checkCompletedWithWrappedException(h0, ex);
2796 >        checkCompletedWithWrappedException(h1, ex);
2797 >        checkCompletedWithWrappedException(h2, ex);
2798 >        checkCompletedWithWrappedException(h3, ex);
2799 >        checkCompletedWithWrappedException(h4, ex);
2800 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2801      }}
2802  
2803      public void testRunAfterEither_exceptionalCompletion2() {
2804          for (ExecutionMode m : ExecutionMode.values())
2805 +        for (boolean fFirst : new boolean[] { true, false })
2806          for (Integer v1 : new Integer[] { 1, null })
2807      {
2808          final CompletableFuture<Integer> f = new CompletableFuture<>();
2809          final CompletableFuture<Integer> g = new CompletableFuture<>();
2638        final Noop r = new Noop();
2639        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2640        final CFException ex = new CFException();
2641
2642        g.completeExceptionally(ex);
2643        checkCompletedWithWrappedCFException(h, ex);
2644        f.complete(v1);
2645
2646        assertEquals(0, r.invocationCount);
2647        checkCompletedNormally(f, v1);
2648        checkCompletedWithWrappedCFException(g, ex);
2649        checkCompletedWithWrappedCFException(h, ex);
2650    }}
2651
2652    public void testRunAfterEither_exceptionalCompletion3() {
2653        for (ExecutionMode m : ExecutionMode.values())
2654        for (Integer v1 : new Integer[] { 1, null })
2655    {
2656        final CompletableFuture<Integer> f = new CompletableFuture<>();
2657        final CompletableFuture<Integer> g = new CompletableFuture<>();
2658        final Noop r = new Noop();
2810          final CFException ex = new CFException();
2811 +        final Noop[] rs = new Noop[6];
2812 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2813  
2814 <        g.completeExceptionally(ex);
2815 <        f.complete(v1);
2816 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2814 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2815 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2816 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2817 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2818 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2819 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2820  
2821 <        // unspecified behavior
2666 <        Integer v;
2821 >        // unspecified behavior - both source completions available
2822          try {
2823 <            assertNull(h.join());
2824 <            assertEquals(1, r.invocationCount);
2823 >            assertNull(h0.join());
2824 >            rs[0].assertInvoked();
2825          } catch (CompletionException ok) {
2826 <            checkCompletedWithWrappedCFException(h, ex);
2827 <            assertEquals(0, r.invocationCount);
2826 >            checkCompletedWithWrappedException(h0, ex);
2827 >            rs[0].assertNotInvoked();
2828          }
2674
2675        checkCompletedWithWrappedCFException(g, ex);
2676        checkCompletedNormally(f, v1);
2677    }}
2678
2679    public void testRunAfterEither_exceptionalCompletion4() {
2680        for (ExecutionMode m : ExecutionMode.values())
2681        for (Integer v1 : new Integer[] { 1, null })
2682    {
2683        final CompletableFuture<Integer> f = new CompletableFuture<>();
2684        final CompletableFuture<Integer> g = new CompletableFuture<>();
2685        final Noop r = new Noop();
2686        final CFException ex = new CFException();
2687
2688        f.completeExceptionally(ex);
2689        g.complete(v1);
2690        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2691
2692        // unspecified behavior
2693        Integer v;
2829          try {
2830 <            assertNull(h.join());
2831 <            assertEquals(1, r.invocationCount);
2830 >            assertNull(h1.join());
2831 >            rs[1].assertInvoked();
2832          } catch (CompletionException ok) {
2833 <            checkCompletedWithWrappedCFException(h, ex);
2834 <            assertEquals(0, r.invocationCount);
2833 >            checkCompletedWithWrappedException(h1, ex);
2834 >            rs[1].assertNotInvoked();
2835 >        }
2836 >        try {
2837 >            assertNull(h2.join());
2838 >            rs[2].assertInvoked();
2839 >        } catch (CompletionException ok) {
2840 >            checkCompletedWithWrappedException(h2, ex);
2841 >            rs[2].assertNotInvoked();
2842 >        }
2843 >        try {
2844 >            assertNull(h3.join());
2845 >            rs[3].assertInvoked();
2846 >        } catch (CompletionException ok) {
2847 >            checkCompletedWithWrappedException(h3, ex);
2848 >            rs[3].assertNotInvoked();
2849          }
2850  
2702        checkCompletedWithWrappedCFException(f, ex);
2703        checkCompletedNormally(g, v1);
2704    }}
2705
2706    /**
2707     * runAfterEither result completes exceptionally if action does
2708     */
2709    public void testRunAfterEither_actionFailed1() {
2710        for (ExecutionMode m : ExecutionMode.values())
2711        for (Integer v1 : new Integer[] { 1, null })
2712        for (Integer v2 : new Integer[] { 2, null })
2713    {
2714        final CompletableFuture<Integer> f = new CompletableFuture<>();
2715        final CompletableFuture<Integer> g = new CompletableFuture<>();
2716        final FailingNoop r = new FailingNoop();
2717        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2718
2719        f.complete(v1);
2720        checkCompletedWithWrappedCFException(h);
2721        g.complete(v2);
2722        checkCompletedNormally(f, v1);
2723        checkCompletedNormally(g, v2);
2724    }}
2725
2726    public void testRunAfterEither_actionFailed2() {
2727        for (ExecutionMode m : ExecutionMode.values())
2728        for (Integer v1 : new Integer[] { 1, null })
2729        for (Integer v2 : new Integer[] { 2, null })
2730    {
2731        final CompletableFuture<Integer> f = new CompletableFuture<>();
2732        final CompletableFuture<Integer> g = new CompletableFuture<>();
2733        final FailingNoop r = new FailingNoop();
2734        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2735
2736        g.complete(v2);
2737        checkCompletedWithWrappedCFException(h);
2738        f.complete(v1);
2851          checkCompletedNormally(f, v1);
2852 <        checkCompletedNormally(g, v2);
2852 >        checkCompletedExceptionally(g, ex);
2853      }}
2854  
2855      /**
2856       * runAfterEither result completes exceptionally if either source cancelled
2857       */
2858 <    public void testRunAfterEither_sourceCancelled1() {
2747 <        for (ExecutionMode m : ExecutionMode.values())
2748 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2749 <        for (Integer v1 : new Integer[] { 1, null })
2750 <    {
2751 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2752 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2753 <        final Noop r = new Noop();
2754 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2755 <
2756 <        assertTrue(f.cancel(mayInterruptIfRunning));
2757 <        checkCompletedWithWrappedCancellationException(h);
2758 <        g.complete(v1);
2759 <
2760 <        checkCancelled(f);
2761 <        assertEquals(0, r.invocationCount);
2762 <        checkCompletedNormally(g, v1);
2763 <        checkCompletedWithWrappedCancellationException(h);
2764 <    }}
2765 <
2766 <    public void testRunAfterEither_sourceCancelled2() {
2858 >    public void testRunAfterEither_sourceCancelled() {
2859          for (ExecutionMode m : ExecutionMode.values())
2860          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2861          for (Integer v1 : new Integer[] { 1, null })
2862      {
2863          final CompletableFuture<Integer> f = new CompletableFuture<>();
2864          final CompletableFuture<Integer> g = new CompletableFuture<>();
2865 <        final Noop r = new Noop();
2866 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2865 >        final Noop[] rs = new Noop[6];
2866 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2867  
2868 <        assertTrue(g.cancel(mayInterruptIfRunning));
2869 <        checkCompletedWithWrappedCancellationException(h);
2870 <        f.complete(v1);
2871 <
2872 <        checkCancelled(g);
2873 <        assertEquals(0, r.invocationCount);
2874 <        checkCompletedNormally(f, v1);
2875 <        checkCompletedWithWrappedCancellationException(h);
2876 <    }}
2877 <
2878 <    public void testRunAfterEither_sourceCancelled3() {
2879 <        for (ExecutionMode m : ExecutionMode.values())
2880 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2881 <        for (Integer v1 : new Integer[] { 1, null })
2882 <    {
2883 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2884 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2885 <        final Noop r = new Noop();
2886 <
2795 <        assertTrue(g.cancel(mayInterruptIfRunning));
2796 <        f.complete(v1);
2797 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2798 <
2799 <        // unspecified behavior
2800 <        Integer v;
2868 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2869 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2870 >        checkIncomplete(h0);
2871 >        checkIncomplete(h1);
2872 >        rs[0].assertNotInvoked();
2873 >        rs[1].assertNotInvoked();
2874 >        f.cancel(mayInterruptIfRunning);
2875 >        checkCompletedWithWrappedCancellationException(h0);
2876 >        checkCompletedWithWrappedCancellationException(h1);
2877 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2878 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2879 >        checkCompletedWithWrappedCancellationException(h2);
2880 >        checkCompletedWithWrappedCancellationException(h3);
2881 >
2882 >        assertTrue(g.complete(v1));
2883 >
2884 >        // unspecified behavior - both source completions available
2885 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2886 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2887          try {
2888 <            assertNull(h.join());
2889 <            assertEquals(1, r.invocationCount);
2888 >            assertNull(h4.join());
2889 >            rs[4].assertInvoked();
2890          } catch (CompletionException ok) {
2891 <            checkCompletedWithWrappedCancellationException(h);
2892 <            assertEquals(0, r.invocationCount);
2891 >            checkCompletedWithWrappedCancellationException(h4);
2892 >            rs[4].assertNotInvoked();
2893          }
2808
2809        checkCancelled(g);
2810        checkCompletedNormally(f, v1);
2811    }}
2812
2813    public void testRunAfterEither_sourceCancelled4() {
2814        for (ExecutionMode m : ExecutionMode.values())
2815        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2816        for (Integer v1 : new Integer[] { 1, null })
2817    {
2818        final CompletableFuture<Integer> f = new CompletableFuture<>();
2819        final CompletableFuture<Integer> g = new CompletableFuture<>();
2820        final Noop r = new Noop();
2821
2822        assertTrue(f.cancel(mayInterruptIfRunning));
2823        g.complete(v1);
2824        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2825
2826        // unspecified behavior
2827        Integer v;
2894          try {
2895 <            assertNull(h.join());
2896 <            assertEquals(1, r.invocationCount);
2895 >            assertNull(h5.join());
2896 >            rs[5].assertInvoked();
2897          } catch (CompletionException ok) {
2898 <            checkCompletedWithWrappedCancellationException(h);
2899 <            assertEquals(0, r.invocationCount);
2898 >            checkCompletedWithWrappedCancellationException(h5);
2899 >            rs[5].assertNotInvoked();
2900          }
2901  
2902          checkCancelled(f);
2903          checkCompletedNormally(g, v1);
2904 +        checkCompletedWithWrappedCancellationException(h0);
2905 +        checkCompletedWithWrappedCancellationException(h1);
2906 +        checkCompletedWithWrappedCancellationException(h2);
2907 +        checkCompletedWithWrappedCancellationException(h3);
2908 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2909      }}
2910  
2911      /**
2912 <     * thenCompose result completes normally after normal completion of source
2912 >     * runAfterEither result completes exceptionally if action does
2913       */
2914 <    public void testThenCompose_normalCompletion1() {
2914 >    public void testRunAfterEither_actionFailed() {
2915          for (ExecutionMode m : ExecutionMode.values())
2916          for (Integer v1 : new Integer[] { 1, null })
2917 +        for (Integer v2 : new Integer[] { 2, null })
2918      {
2919          final CompletableFuture<Integer> f = new CompletableFuture<>();
2920 <        final CompletableFutureInc r = new CompletableFutureInc();
2921 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2922 <        f.complete(v1);
2923 <        checkCompletedNormally(g, inc(v1));
2920 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2921 >        final FailingRunnable[] rs = new FailingRunnable[6];
2922 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2923 >
2924 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2925 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2926 >        assertTrue(f.complete(v1));
2927 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2928 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2929 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2930 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2931 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2932 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2933 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2934 >        assertTrue(g.complete(v2));
2935 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2936 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2937 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2938 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2939 >
2940          checkCompletedNormally(f, v1);
2941 <        assertEquals(1, r.invocationCount);
2941 >        checkCompletedNormally(g, v2);
2942 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2943      }}
2944  
2945 <    public void testThenCompose_normalCompletion2() {
2945 >    /**
2946 >     * thenCompose result completes normally after normal completion of source
2947 >     */
2948 >    public void testThenCompose_normalCompletion() {
2949          for (ExecutionMode m : ExecutionMode.values())
2950 +        for (boolean createIncomplete : new boolean[] { true, false })
2951          for (Integer v1 : new Integer[] { 1, null })
2952      {
2953          final CompletableFuture<Integer> f = new CompletableFuture<>();
2954 <        final CompletableFutureInc r = new CompletableFutureInc();
2955 <        f.complete(v1);
2956 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2954 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2955 >        if (!createIncomplete) assertTrue(f.complete(v1));
2956 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2957 >        if (createIncomplete) assertTrue(f.complete(v1));
2958 >
2959          checkCompletedNormally(g, inc(v1));
2960          checkCompletedNormally(f, v1);
2961 <        assertEquals(1, r.invocationCount);
2961 >        r.assertValue(v1);
2962      }}
2963  
2964      /**
2965       * thenCompose result completes exceptionally after exceptional
2966       * completion of source
2967       */
2968 <    public void testThenCompose_exceptionalCompletion1() {
2968 >    public void testThenCompose_exceptionalCompletion() {
2969          for (ExecutionMode m : ExecutionMode.values())
2970 +        for (boolean createIncomplete : new boolean[] { true, false })
2971      {
2972          final CFException ex = new CFException();
2973 <        final CompletableFutureInc r = new CompletableFutureInc();
2973 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2974          final CompletableFuture<Integer> f = new CompletableFuture<>();
2975 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2976 <        f.completeExceptionally(ex);
2977 <        checkCompletedWithWrappedCFException(g, ex);
2882 <        checkCompletedWithWrappedCFException(f, ex);
2883 <    }}
2975 >        if (!createIncomplete) f.completeExceptionally(ex);
2976 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2977 >        if (createIncomplete) f.completeExceptionally(ex);
2978  
2979 <    public void testThenCompose_exceptionalCompletion2() {
2980 <        for (ExecutionMode m : ExecutionMode.values())
2981 <    {
2888 <        final CFException ex = new CFException();
2889 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2890 <        f.completeExceptionally(ex);
2891 <        final CompletableFutureInc r = new CompletableFutureInc();
2892 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2893 <        checkCompletedWithWrappedCFException(g, ex);
2894 <        checkCompletedWithWrappedCFException(f, ex);
2979 >        checkCompletedWithWrappedException(g, ex);
2980 >        checkCompletedExceptionally(f, ex);
2981 >        r.assertNotInvoked();
2982      }}
2983  
2984      /**
2985       * thenCompose result completes exceptionally if action does
2986       */
2987 <    public void testThenCompose_actionFailed1() {
2987 >    public void testThenCompose_actionFailed() {
2988          for (ExecutionMode m : ExecutionMode.values())
2989 +        for (boolean createIncomplete : new boolean[] { true, false })
2990          for (Integer v1 : new Integer[] { 1, null })
2991      {
2992          final CompletableFuture<Integer> f = new CompletableFuture<>();
2993          final FailingCompletableFutureFunction r
2994 <            = new FailingCompletableFutureFunction();
2995 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2996 <        f.complete(v1);
2997 <        checkCompletedWithWrappedCFException(g);
2910 <        checkCompletedNormally(f, v1);
2911 <    }}
2994 >            = new FailingCompletableFutureFunction(m);
2995 >        if (!createIncomplete) assertTrue(f.complete(v1));
2996 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2997 >        if (createIncomplete) assertTrue(f.complete(v1));
2998  
2999 <    public void testThenCompose_actionFailed2() {
2914 <        for (ExecutionMode m : ExecutionMode.values())
2915 <        for (Integer v1 : new Integer[] { 1, null })
2916 <    {
2917 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2918 <        f.complete(v1);
2919 <        final FailingCompletableFutureFunction r
2920 <            = new FailingCompletableFutureFunction();
2921 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2922 <        checkCompletedWithWrappedCFException(g);
2999 >        checkCompletedWithWrappedException(g, r.ex);
3000          checkCompletedNormally(f, v1);
3001      }}
3002  
3003      /**
3004       * thenCompose result completes exceptionally if source cancelled
3005       */
3006 <    public void testThenCompose_sourceCancelled1() {
3006 >    public void testThenCompose_sourceCancelled() {
3007          for (ExecutionMode m : ExecutionMode.values())
3008 +        for (boolean createIncomplete : new boolean[] { true, false })
3009          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3010      {
3011          final CompletableFuture<Integer> f = new CompletableFuture<>();
3012 <        final CompletableFutureInc r = new CompletableFutureInc();
3013 <        final CompletableFuture<Integer> g = f.thenCompose(r);
3014 <        assertTrue(f.cancel(mayInterruptIfRunning));
3015 <        checkCompletedWithWrappedCancellationException(g);
3016 <        checkCancelled(f);
3017 <    }}
3012 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3013 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3014 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3015 >        if (createIncomplete) {
3016 >            checkIncomplete(g);
3017 >            assertTrue(f.cancel(mayInterruptIfRunning));
3018 >        }
3019  
2941    public void testThenCompose_sourceCancelled2() {
2942        for (ExecutionMode m : ExecutionMode.values())
2943        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2944    {
2945        final CompletableFuture<Integer> f = new CompletableFuture<>();
2946        assertTrue(f.cancel(mayInterruptIfRunning));
2947        final CompletableFutureInc r = new CompletableFutureInc();
2948        final CompletableFuture<Integer> g = f.thenCompose(r);
3020          checkCompletedWithWrappedCancellationException(g);
3021          checkCancelled(f);
3022      }}
3023  
2953    // asyncs
2954
2955    /**
2956     * thenRunAsync result completes normally after normal completion of source
2957     */
2958    public void testThenRunAsync() {
2959        CompletableFuture<Integer> f = new CompletableFuture<>();
2960        Noop r = new Noop();
2961        CompletableFuture<Void> g = f.thenRunAsync(r);
2962        f.complete(null);
2963        checkCompletedNormally(g, null);
2964
2965        // reordered version
2966        f = new CompletableFuture<>();
2967        f.complete(null);
2968        r = new Noop();
2969        g = f.thenRunAsync(r);
2970        checkCompletedNormally(g, null);
2971    }
2972
2973    /**
2974     * thenRunAsync result completes exceptionally after exceptional
2975     * completion of source
2976     */
2977    public void testThenRunAsync2() {
2978        CompletableFuture<Integer> f = new CompletableFuture<>();
2979        Noop r = new Noop();
2980        CompletableFuture<Void> g = f.thenRunAsync(r);
2981        f.completeExceptionally(new CFException());
2982        try {
2983            g.join();
2984            shouldThrow();
2985        } catch (CompletionException success) {}
2986        checkCompletedWithWrappedCFException(g);
2987    }
2988
2989    /**
2990     * thenRunAsync result completes exceptionally if action does
2991     */
2992    public void testThenRunAsync3() {
2993        CompletableFuture<Integer> f = new CompletableFuture<>();
2994        FailingNoop r = new FailingNoop();
2995        CompletableFuture<Void> g = f.thenRunAsync(r);
2996        f.complete(null);
2997        checkCompletedWithWrappedCFException(g);
2998    }
2999
3000    /**
3001     * thenRunAsync result completes exceptionally if source cancelled
3002     */
3003    public void testThenRunAsync4() {
3004        CompletableFuture<Integer> f = new CompletableFuture<>();
3005        Noop r = new Noop();
3006        CompletableFuture<Void> g = f.thenRunAsync(r);
3007        assertTrue(f.cancel(true));
3008        checkCompletedWithWrappedCancellationException(g);
3009    }
3010
3011    /**
3012     * thenApplyAsync result completes normally after normal completion of source
3013     */
3014    public void testThenApplyAsync() {
3015        CompletableFuture<Integer> f = new CompletableFuture<>();
3016        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3017        f.complete(one);
3018        checkCompletedNormally(g, two);
3019    }
3020
3021    /**
3022     * thenApplyAsync result completes exceptionally after exceptional
3023     * completion of source
3024     */
3025    public void testThenApplyAsync2() {
3026        CompletableFuture<Integer> f = new CompletableFuture<>();
3027        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3028        f.completeExceptionally(new CFException());
3029        checkCompletedWithWrappedCFException(g);
3030    }
3031
3032    /**
3033     * thenApplyAsync result completes exceptionally if action does
3034     */
3035    public void testThenApplyAsync3() {
3036        CompletableFuture<Integer> f = new CompletableFuture<>();
3037        FailingFunction r = new FailingFunction();
3038        CompletableFuture<Integer> g = f.thenApplyAsync(r);
3039        f.complete(null);
3040        checkCompletedWithWrappedCFException(g);
3041    }
3042
3043    /**
3044     * thenApplyAsync result completes exceptionally if source cancelled
3045     */
3046    public void testThenApplyAsync4() {
3047        CompletableFuture<Integer> f = new CompletableFuture<>();
3048        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3049        assertTrue(f.cancel(true));
3050        checkCompletedWithWrappedCancellationException(g);
3051    }
3052
3053    /**
3054     * thenAcceptAsync result completes normally after normal
3055     * completion of source
3056     */
3057    public void testThenAcceptAsync() {
3058        CompletableFuture<Integer> f = new CompletableFuture<>();
3059        IncAction r = new IncAction();
3060        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3061        f.complete(one);
3062        checkCompletedNormally(g, null);
3063        assertEquals(r.value, (Integer) 2);
3064    }
3065
3066    /**
3067     * thenAcceptAsync result completes exceptionally after exceptional
3068     * completion of source
3069     */
3070    public void testThenAcceptAsync2() {
3071        CompletableFuture<Integer> f = new CompletableFuture<>();
3072        IncAction r = new IncAction();
3073        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3074        f.completeExceptionally(new CFException());
3075        checkCompletedWithWrappedCFException(g);
3076    }
3077
3078    /**
3079     * thenAcceptAsync result completes exceptionally if action does
3080     */
3081    public void testThenAcceptAsync3() {
3082        CompletableFuture<Integer> f = new CompletableFuture<>();
3083        FailingConsumer r = new FailingConsumer();
3084        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3085        f.complete(null);
3086        checkCompletedWithWrappedCFException(g);
3087    }
3088
3089    /**
3090     * thenAcceptAsync result completes exceptionally if source cancelled
3091     */
3092    public void testThenAcceptAsync4() {
3093        CompletableFuture<Integer> f = new CompletableFuture<>();
3094        IncAction r = new IncAction();
3095        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3096        assertTrue(f.cancel(true));
3097        checkCompletedWithWrappedCancellationException(g);
3098    }
3099
3100    // async with explicit executors
3101
3102    /**
3103     * thenRunAsync result completes normally after normal completion of source
3104     */
3105    public void testThenRunAsyncE() {
3106        CompletableFuture<Integer> f = new CompletableFuture<>();
3107        Noop r = new Noop();
3108        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3109        f.complete(null);
3110        checkCompletedNormally(g, null);
3111
3112        // reordered version
3113        f = new CompletableFuture<>();
3114        f.complete(null);
3115        r = new Noop();
3116        g = f.thenRunAsync(r, new ThreadExecutor());
3117        checkCompletedNormally(g, null);
3118    }
3119
3120    /**
3121     * thenRunAsync result completes exceptionally after exceptional
3122     * completion of source
3123     */
3124    public void testThenRunAsync2E() {
3125        CompletableFuture<Integer> f = new CompletableFuture<>();
3126        Noop r = new Noop();
3127        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3128        f.completeExceptionally(new CFException());
3129        try {
3130            g.join();
3131            shouldThrow();
3132        } catch (CompletionException success) {}
3133        checkCompletedWithWrappedCFException(g);
3134    }
3135
3136    /**
3137     * thenRunAsync result completes exceptionally if action does
3138     */
3139    public void testThenRunAsync3E() {
3140        CompletableFuture<Integer> f = new CompletableFuture<>();
3141        FailingNoop r = new FailingNoop();
3142        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3143        f.complete(null);
3144        checkCompletedWithWrappedCFException(g);
3145    }
3146
3147    /**
3148     * thenRunAsync result completes exceptionally if source cancelled
3149     */
3150    public void testThenRunAsync4E() {
3151        CompletableFuture<Integer> f = new CompletableFuture<>();
3152        Noop r = new Noop();
3153        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3154        assertTrue(f.cancel(true));
3155        checkCompletedWithWrappedCancellationException(g);
3156    }
3157
3158    /**
3159     * thenApplyAsync result completes normally after normal completion of source
3160     */
3161    public void testThenApplyAsyncE() {
3162        CompletableFuture<Integer> f = new CompletableFuture<>();
3163        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3164        f.complete(one);
3165        checkCompletedNormally(g, two);
3166    }
3167
3168    /**
3169     * thenApplyAsync result completes exceptionally after exceptional
3170     * completion of source
3171     */
3172    public void testThenApplyAsync2E() {
3173        CompletableFuture<Integer> f = new CompletableFuture<>();
3174        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3175        f.completeExceptionally(new CFException());
3176        checkCompletedWithWrappedCFException(g);
3177    }
3178
3179    /**
3180     * thenApplyAsync result completes exceptionally if action does
3181     */
3182    public void testThenApplyAsync3E() {
3183        CompletableFuture<Integer> f = new CompletableFuture<>();
3184        FailingFunction r = new FailingFunction();
3185        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
3186        f.complete(null);
3187        checkCompletedWithWrappedCFException(g);
3188    }
3189
3190    /**
3191     * thenApplyAsync result completes exceptionally if source cancelled
3192     */
3193    public void testThenApplyAsync4E() {
3194        CompletableFuture<Integer> f = new CompletableFuture<>();
3195        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3196        assertTrue(f.cancel(true));
3197        checkCompletedWithWrappedCancellationException(g);
3198    }
3199
3200    /**
3201     * thenAcceptAsync result completes normally after normal
3202     * completion of source
3203     */
3204    public void testThenAcceptAsyncE() {
3205        CompletableFuture<Integer> f = new CompletableFuture<>();
3206        IncAction r = new IncAction();
3207        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3208        f.complete(one);
3209        checkCompletedNormally(g, null);
3210        assertEquals(r.value, (Integer) 2);
3211    }
3212
3024      /**
3025 <     * thenAcceptAsync result completes exceptionally after exceptional
3215 <     * completion of source
3216 <     */
3217 <    public void testThenAcceptAsync2E() {
3218 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3219 <        IncAction r = new IncAction();
3220 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3221 <        f.completeExceptionally(new CFException());
3222 <        checkCompletedWithWrappedCFException(g);
3223 <    }
3224 <
3225 <    /**
3226 <     * thenAcceptAsync result completes exceptionally if action does
3025 >     * thenCompose result completes exceptionally if the result of the action does
3026       */
3027 <    public void testThenAcceptAsync3E() {
3028 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3029 <        FailingConsumer r = new FailingConsumer();
3030 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3031 <        f.complete(null);
3032 <        checkCompletedWithWrappedCFException(g);
3033 <    }
3027 >    public void testThenCompose_actionReturnsFailingFuture() {
3028 >        for (ExecutionMode m : ExecutionMode.values())
3029 >        for (int order = 0; order < 6; order++)
3030 >        for (Integer v1 : new Integer[] { 1, null })
3031 >    {
3032 >        final CFException ex = new CFException();
3033 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
3034 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3035 >        final CompletableFuture<Integer> h;
3036 >        // Test all permutations of orders
3037 >        switch (order) {
3038 >        case 0:
3039 >            assertTrue(f.complete(v1));
3040 >            assertTrue(g.completeExceptionally(ex));
3041 >            h = m.thenCompose(f, (x -> g));
3042 >            break;
3043 >        case 1:
3044 >            assertTrue(f.complete(v1));
3045 >            h = m.thenCompose(f, (x -> g));
3046 >            assertTrue(g.completeExceptionally(ex));
3047 >            break;
3048 >        case 2:
3049 >            assertTrue(g.completeExceptionally(ex));
3050 >            assertTrue(f.complete(v1));
3051 >            h = m.thenCompose(f, (x -> g));
3052 >            break;
3053 >        case 3:
3054 >            assertTrue(g.completeExceptionally(ex));
3055 >            h = m.thenCompose(f, (x -> g));
3056 >            assertTrue(f.complete(v1));
3057 >            break;
3058 >        case 4:
3059 >            h = m.thenCompose(f, (x -> g));
3060 >            assertTrue(f.complete(v1));
3061 >            assertTrue(g.completeExceptionally(ex));
3062 >            break;
3063 >        case 5:
3064 >            h = m.thenCompose(f, (x -> g));
3065 >            assertTrue(f.complete(v1));
3066 >            assertTrue(g.completeExceptionally(ex));
3067 >            break;
3068 >        default: throw new AssertionError();
3069 >        }
3070  
3071 <    /**
3072 <     * thenAcceptAsync result completes exceptionally if source cancelled
3073 <     */
3074 <    public void testThenAcceptAsync4E() {
3240 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3241 <        IncAction r = new IncAction();
3242 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3243 <        assertTrue(f.cancel(true));
3244 <        checkCompletedWithWrappedCancellationException(g);
3245 <    }
3071 >        checkCompletedExceptionally(g, ex);
3072 >        checkCompletedWithWrappedException(h, ex);
3073 >        checkCompletedNormally(f, v1);
3074 >    }}
3075  
3076      // other static methods
3077  
# Line 3260 | Line 3089 | public class CompletableFutureTest exten
3089       * when all components complete normally
3090       */
3091      public void testAllOf_normal() throws Exception {
3092 <        for (int k = 1; k < 20; ++k) {
3093 <            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3094 <            for (int i = 0; i < k; ++i)
3092 >        for (int k = 1; k < 10; k++) {
3093 >            CompletableFuture<Integer>[] fs
3094 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3095 >            for (int i = 0; i < k; i++)
3096 >                fs[i] = new CompletableFuture<>();
3097 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3098 >            for (int i = 0; i < k; i++) {
3099 >                checkIncomplete(f);
3100 >                checkIncomplete(CompletableFuture.allOf(fs));
3101 >                fs[i].complete(one);
3102 >            }
3103 >            checkCompletedNormally(f, null);
3104 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3105 >        }
3106 >    }
3107 >
3108 >    public void testAllOf_normal_backwards() throws Exception {
3109 >        for (int k = 1; k < 10; k++) {
3110 >            CompletableFuture<Integer>[] fs
3111 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3112 >            for (int i = 0; i < k; i++)
3113                  fs[i] = new CompletableFuture<>();
3114              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3115 <            for (int i = 0; i < k; ++i) {
3115 >            for (int i = k - 1; i >= 0; i--) {
3116                  checkIncomplete(f);
3117                  checkIncomplete(CompletableFuture.allOf(fs));
3118                  fs[i].complete(one);
# Line 3275 | Line 3122 | public class CompletableFutureTest exten
3122          }
3123      }
3124  
3125 +    public void testAllOf_exceptional() throws Exception {
3126 +        for (int k = 1; k < 10; k++) {
3127 +            CompletableFuture<Integer>[] fs
3128 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3129 +            CFException ex = new CFException();
3130 +            for (int i = 0; i < k; i++)
3131 +                fs[i] = new CompletableFuture<>();
3132 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3133 +            for (int i = 0; i < k; i++) {
3134 +                checkIncomplete(f);
3135 +                checkIncomplete(CompletableFuture.allOf(fs));
3136 +                if (i != k / 2) {
3137 +                    fs[i].complete(i);
3138 +                    checkCompletedNormally(fs[i], i);
3139 +                } else {
3140 +                    fs[i].completeExceptionally(ex);
3141 +                    checkCompletedExceptionally(fs[i], ex);
3142 +                }
3143 +            }
3144 +            checkCompletedWithWrappedException(f, ex);
3145 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3146 +        }
3147 +    }
3148 +
3149      /**
3150       * anyOf(no component futures) returns an incomplete future
3151       */
3152      public void testAnyOf_empty() throws Exception {
3153 +        for (Integer v1 : new Integer[] { 1, null })
3154 +    {
3155          CompletableFuture<Object> f = CompletableFuture.anyOf();
3156          checkIncomplete(f);
3157 <    }
3157 >
3158 >        f.complete(v1);
3159 >        checkCompletedNormally(f, v1);
3160 >    }}
3161  
3162      /**
3163       * anyOf returns a future completed normally with a value when
3164       * a component future does
3165       */
3166      public void testAnyOf_normal() throws Exception {
3167 <        for (int k = 0; k < 10; ++k) {
3167 >        for (int k = 0; k < 10; k++) {
3168              CompletableFuture[] fs = new CompletableFuture[k];
3169 <            for (int i = 0; i < k; ++i)
3169 >            for (int i = 0; i < k; i++)
3170                  fs[i] = new CompletableFuture<>();
3171              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3172              checkIncomplete(f);
3173 <            for (int i = 0; i < k; ++i) {
3174 <                fs[i].complete(one);
3175 <                checkCompletedNormally(f, one);
3176 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3173 >            for (int i = 0; i < k; i++) {
3174 >                fs[i].complete(i);
3175 >                checkCompletedNormally(f, 0);
3176 >                int x = (int) CompletableFuture.anyOf(fs).join();
3177 >                assertTrue(0 <= x && x <= i);
3178 >            }
3179 >        }
3180 >    }
3181 >    public void testAnyOf_normal_backwards() throws Exception {
3182 >        for (int k = 0; k < 10; k++) {
3183 >            CompletableFuture[] fs = new CompletableFuture[k];
3184 >            for (int i = 0; i < k; i++)
3185 >                fs[i] = new CompletableFuture<>();
3186 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3187 >            checkIncomplete(f);
3188 >            for (int i = k - 1; i >= 0; i--) {
3189 >                fs[i].complete(i);
3190 >                checkCompletedNormally(f, k - 1);
3191 >                int x = (int) CompletableFuture.anyOf(fs).join();
3192 >                assertTrue(i <= x && x <= k - 1);
3193              }
3194          }
3195      }
# Line 3306 | Line 3198 | public class CompletableFutureTest exten
3198       * anyOf result completes exceptionally when any component does.
3199       */
3200      public void testAnyOf_exceptional() throws Exception {
3201 <        for (int k = 0; k < 10; ++k) {
3201 >        for (int k = 0; k < 10; k++) {
3202 >            CompletableFuture[] fs = new CompletableFuture[k];
3203 >            CFException[] exs = new CFException[k];
3204 >            for (int i = 0; i < k; i++) {
3205 >                fs[i] = new CompletableFuture<>();
3206 >                exs[i] = new CFException();
3207 >            }
3208 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3209 >            checkIncomplete(f);
3210 >            for (int i = 0; i < k; i++) {
3211 >                fs[i].completeExceptionally(exs[i]);
3212 >                checkCompletedWithWrappedException(f, exs[0]);
3213 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3214 >            }
3215 >        }
3216 >    }
3217 >
3218 >    public void testAnyOf_exceptional_backwards() throws Exception {
3219 >        for (int k = 0; k < 10; k++) {
3220              CompletableFuture[] fs = new CompletableFuture[k];
3221 <            for (int i = 0; i < k; ++i)
3221 >            CFException[] exs = new CFException[k];
3222 >            for (int i = 0; i < k; i++) {
3223                  fs[i] = new CompletableFuture<>();
3224 +                exs[i] = new CFException();
3225 +            }
3226              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3227              checkIncomplete(f);
3228 <            for (int i = 0; i < k; ++i) {
3229 <                fs[i].completeExceptionally(new CFException());
3230 <                checkCompletedWithWrappedCFException(f);
3228 >            for (int i = k - 1; i >= 0; i--) {
3229 >                fs[i].completeExceptionally(exs[i]);
3230 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3231                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3232              }
3233          }
# Line 3323 | Line 3236 | public class CompletableFutureTest exten
3236      /**
3237       * Completion methods throw NullPointerException with null arguments
3238       */
3239 +    @SuppressWarnings("FutureReturnValueIgnored")
3240      public void testNPE() {
3241          CompletableFuture<Integer> f = new CompletableFuture<>();
3242          CompletableFuture<Integer> g = new CompletableFuture<>();
3243          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3330        CompletableFuture<?> h;
3244          ThreadExecutor exec = new ThreadExecutor();
3245  
3246          Runnable[] throwingActions = {
3247              () -> CompletableFuture.supplyAsync(null),
3248              () -> CompletableFuture.supplyAsync(null, exec),
3249 <            () -> CompletableFuture.supplyAsync(supplyOne, null),
3249 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3250  
3251              () -> CompletableFuture.runAsync(null),
3252              () -> CompletableFuture.runAsync(null, exec),
# Line 3343 | Line 3256 | public class CompletableFutureTest exten
3256  
3257              () -> f.thenApply(null),
3258              () -> f.thenApplyAsync(null),
3259 <            () -> f.thenApplyAsync((x) -> x, null),
3259 >            () -> f.thenApplyAsync(x -> x, null),
3260              () -> f.thenApplyAsync(null, exec),
3261  
3262              () -> f.thenAccept(null),
3263              () -> f.thenAcceptAsync(null),
3264 <            () -> f.thenAcceptAsync((x) -> {} , null),
3264 >            () -> f.thenAcceptAsync(x -> {} , null),
3265              () -> f.thenAcceptAsync(null, exec),
3266  
3267              () -> f.thenRun(null),
# Line 3383 | Line 3296 | public class CompletableFutureTest exten
3296              () -> f.applyToEither(g, null),
3297              () -> f.applyToEitherAsync(g, null),
3298              () -> f.applyToEitherAsync(g, null, exec),
3299 <            () -> f.applyToEither(nullFuture, (x) -> x),
3300 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3301 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3302 <            () -> f.applyToEitherAsync(g, (x) -> x, null),
3299 >            () -> f.applyToEither(nullFuture, x -> x),
3300 >            () -> f.applyToEitherAsync(nullFuture, x -> x),
3301 >            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3302 >            () -> f.applyToEitherAsync(g, x -> x, null),
3303  
3304              () -> f.acceptEither(g, null),
3305              () -> f.acceptEitherAsync(g, null),
3306              () -> f.acceptEitherAsync(g, null, exec),
3307 <            () -> f.acceptEither(nullFuture, (x) -> {}),
3308 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3309 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3310 <            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3307 >            () -> f.acceptEither(nullFuture, x -> {}),
3308 >            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3309 >            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3310 >            () -> f.acceptEitherAsync(g, x -> {}, null),
3311  
3312              () -> f.runAfterEither(g, null),
3313              () -> f.runAfterEitherAsync(g, null),
# Line 3406 | Line 3319 | public class CompletableFutureTest exten
3319  
3320              () -> f.thenCompose(null),
3321              () -> f.thenComposeAsync(null),
3322 <            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
3322 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3323              () -> f.thenComposeAsync(null, exec),
3324  
3325              () -> f.exceptionally(null),
# Line 3424 | Line 3337 | public class CompletableFutureTest exten
3337              () -> CompletableFuture.anyOf(null, f),
3338  
3339              () -> f.obtrudeException(null),
3340 +
3341 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3342 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3343 +            () -> CompletableFuture.delayedExecutor(1L, null),
3344 +
3345 +            () -> f.orTimeout(1L, null),
3346 +            () -> f.completeOnTimeout(42, 1L, null),
3347 +
3348 +            () -> CompletableFuture.failedFuture(null),
3349 +            () -> CompletableFuture.failedStage(null),
3350          };
3351  
3352          assertThrows(NullPointerException.class, throwingActions);
# Line 3431 | Line 3354 | public class CompletableFutureTest exten
3354      }
3355  
3356      /**
3357 +     * Test submissions to an executor that rejects all tasks.
3358 +     */
3359 +    public void testRejectingExecutor() {
3360 +        for (Integer v : new Integer[] { 1, null })
3361 +    {
3362 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3363 +
3364 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3365 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3366 +
3367 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3368 +
3369 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3370 +        srcs.add(complete);
3371 +        srcs.add(incomplete);
3372 +
3373 +        for (CompletableFuture<Integer> src : srcs) {
3374 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3375 +            fs.add(src.thenRunAsync(() -> {}, e));
3376 +            fs.add(src.thenAcceptAsync(z -> {}, e));
3377 +            fs.add(src.thenApplyAsync(z -> z, e));
3378 +
3379 +            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3380 +            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3381 +            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3382 +
3383 +            fs.add(src.applyToEitherAsync(src, z -> z, e));
3384 +            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3385 +            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3386 +
3387 +            fs.add(src.thenComposeAsync(z -> null, e));
3388 +            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3389 +            fs.add(src.handleAsync((z, t) -> null, e));
3390 +
3391 +            for (CompletableFuture<?> future : fs) {
3392 +                if (src.isDone())
3393 +                    checkCompletedWithWrappedException(future, e.ex);
3394 +                else
3395 +                    checkIncomplete(future);
3396 +            }
3397 +            futures.addAll(fs);
3398 +        }
3399 +
3400 +        {
3401 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3402 +
3403 +            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3404 +            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3405 +
3406 +            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3407 +            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3408 +
3409 +            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3410 +            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3411 +
3412 +            for (CompletableFuture<?> future : fs)
3413 +                checkIncomplete(future);
3414 +            futures.addAll(fs);
3415 +        }
3416 +
3417 +        {
3418 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3419 +
3420 +            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3421 +            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3422 +
3423 +            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3424 +            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3425 +
3426 +            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3427 +            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3428 +
3429 +            for (CompletableFuture<?> future : fs)
3430 +                checkCompletedWithWrappedException(future, e.ex);
3431 +            futures.addAll(fs);
3432 +        }
3433 +
3434 +        incomplete.complete(v);
3435 +
3436 +        for (CompletableFuture<?> future : futures)
3437 +            checkCompletedWithWrappedException(future, e.ex);
3438 +
3439 +        assertEquals(futures.size(), e.count.get());
3440 +    }}
3441 +
3442 +    /**
3443 +     * Test submissions to an executor that rejects all tasks, but
3444 +     * should never be invoked because the dependent future is
3445 +     * explicitly completed.
3446 +     */
3447 +    public void testRejectingExecutorNeverInvoked() {
3448 +        for (Integer v : new Integer[] { 1, null })
3449 +    {
3450 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3451 +
3452 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3453 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3454 +
3455 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3456 +
3457 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3458 +        srcs.add(complete);
3459 +        srcs.add(incomplete);
3460 +
3461 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3462 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3463 +        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3464 +        fs.add(incomplete.thenApplyAsync(z -> z, e));
3465 +
3466 +        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3467 +        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3468 +        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3469 +
3470 +        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3471 +        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3472 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3473 +
3474 +        fs.add(incomplete.thenComposeAsync(z -> null, e));
3475 +        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3476 +        fs.add(incomplete.handleAsync((z, t) -> null, e));
3477 +
3478 +        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3479 +        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3480 +
3481 +        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3482 +        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3483 +
3484 +        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3485 +        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3486 +
3487 +        for (CompletableFuture<?> future : fs)
3488 +            checkIncomplete(future);
3489 +
3490 +        for (CompletableFuture<?> future : fs)
3491 +            future.complete(null);
3492 +
3493 +        incomplete.complete(v);
3494 +
3495 +        for (CompletableFuture<?> future : fs)
3496 +            checkCompletedNormally(future, null);
3497 +
3498 +        assertEquals(0, e.count.get());
3499 +    }}
3500 +
3501 +    /**
3502       * toCompletableFuture returns this CompletableFuture.
3503       */
3504      public void testToCompletableFuture() {
# Line 3438 | Line 3506 | public class CompletableFutureTest exten
3506          assertSame(f, f.toCompletableFuture());
3507      }
3508  
3509 +    // jdk9
3510 +
3511      /**
3512 <     * whenComplete action executes on normal completion, propagating
3443 <     * source result.
3512 >     * newIncompleteFuture returns an incomplete CompletableFuture
3513       */
3514 <    public void testWhenComplete_normalCompletion1() {
3515 <        for (ExecutionMode m : ExecutionMode.values())
3514 >    public void testNewIncompleteFuture() {
3515 >        for (Integer v1 : new Integer[] { 1, null })
3516 >    {
3517 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3518 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3519 >        checkIncomplete(f);
3520 >        checkIncomplete(g);
3521 >        f.complete(v1);
3522 >        checkCompletedNormally(f, v1);
3523 >        checkIncomplete(g);
3524 >        g.complete(v1);
3525 >        checkCompletedNormally(g, v1);
3526 >        assertSame(g.getClass(), CompletableFuture.class);
3527 >    }}
3528 >
3529 >    /**
3530 >     * completedStage returns a completed CompletionStage
3531 >     */
3532 >    public void testCompletedStage() {
3533 >        AtomicInteger x = new AtomicInteger(0);
3534 >        AtomicReference<Throwable> r = new AtomicReference<>();
3535 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3536 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3537 >        assertEquals(x.get(), 1);
3538 >        assertNull(r.get());
3539 >    }
3540 >
3541 >    /**
3542 >     * defaultExecutor by default returns the commonPool if
3543 >     * it supports more than one thread.
3544 >     */
3545 >    public void testDefaultExecutor() {
3546 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3547 >        Executor e = f.defaultExecutor();
3548 >        Executor c = ForkJoinPool.commonPool();
3549 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3550 >            assertSame(e, c);
3551 >        else
3552 >            assertNotSame(e, c);
3553 >    }
3554 >
3555 >    /**
3556 >     * failedFuture returns a CompletableFuture completed
3557 >     * exceptionally with the given Exception
3558 >     */
3559 >    public void testFailedFuture() {
3560 >        CFException ex = new CFException();
3561 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3562 >        checkCompletedExceptionally(f, ex);
3563 >    }
3564 >
3565 >    /**
3566 >     * failedFuture(null) throws NPE
3567 >     */
3568 >    public void testFailedFuture_null() {
3569 >        try {
3570 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3571 >            shouldThrow();
3572 >        } catch (NullPointerException success) {}
3573 >    }
3574 >
3575 >    /**
3576 >     * copy returns a CompletableFuture that is completed normally,
3577 >     * with the same value, when source is.
3578 >     */
3579 >    public void testCopy_normalCompletion() {
3580          for (boolean createIncomplete : new boolean[] { true, false })
3581          for (Integer v1 : new Integer[] { 1, null })
3582      {
3583 <        final AtomicInteger a = new AtomicInteger(0);
3584 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3585 <        if (!createIncomplete) f.complete(v1);
3586 <        final CompletableFuture<Integer> g = m.whenComplete
3587 <            (f,
3588 <             (Integer x, Throwable t) -> {
3589 <                threadAssertSame(x, v1);
3590 <                threadAssertNull(t);
3591 <                a.getAndIncrement();
3592 <            });
3593 <        if (createIncomplete) f.complete(v1);
3583 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3584 >        if (!createIncomplete) assertTrue(f.complete(v1));
3585 >        CompletableFuture<Integer> g = f.copy();
3586 >        if (createIncomplete) {
3587 >            checkIncomplete(f);
3588 >            checkIncomplete(g);
3589 >            assertTrue(f.complete(v1));
3590 >        }
3591 >        checkCompletedNormally(f, v1);
3592 >        checkCompletedNormally(g, v1);
3593 >    }}
3594 >
3595 >    /**
3596 >     * copy returns a CompletableFuture that is completed exceptionally
3597 >     * when source is.
3598 >     */
3599 >    public void testCopy_exceptionalCompletion() {
3600 >        for (boolean createIncomplete : new boolean[] { true, false })
3601 >    {
3602 >        CFException ex = new CFException();
3603 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3604 >        if (!createIncomplete) f.completeExceptionally(ex);
3605 >        CompletableFuture<Integer> g = f.copy();
3606 >        if (createIncomplete) {
3607 >            checkIncomplete(f);
3608 >            checkIncomplete(g);
3609 >            f.completeExceptionally(ex);
3610 >        }
3611 >        checkCompletedExceptionally(f, ex);
3612 >        checkCompletedWithWrappedException(g, ex);
3613 >    }}
3614 >
3615 >    /**
3616 >     * Completion of a copy does not complete its source.
3617 >     */
3618 >    public void testCopy_oneWayPropagation() {
3619 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3620 >        assertTrue(f.copy().complete(1));
3621 >        assertTrue(f.copy().complete(null));
3622 >        assertTrue(f.copy().cancel(true));
3623 >        assertTrue(f.copy().cancel(false));
3624 >        assertTrue(f.copy().completeExceptionally(new CFException()));
3625 >        checkIncomplete(f);
3626 >    }
3627  
3628 +    /**
3629 +     * minimalCompletionStage returns a CompletableFuture that is
3630 +     * completed normally, with the same value, when source is.
3631 +     */
3632 +    public void testMinimalCompletionStage() {
3633 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3634 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3635 +        AtomicInteger x = new AtomicInteger(0);
3636 +        AtomicReference<Throwable> r = new AtomicReference<>();
3637 +        checkIncomplete(f);
3638 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3639 +        f.complete(1);
3640 +        checkCompletedNormally(f, 1);
3641 +        assertEquals(x.get(), 1);
3642 +        assertNull(r.get());
3643 +    }
3644 +
3645 +    /**
3646 +     * minimalCompletionStage returns a CompletableFuture that is
3647 +     * completed exceptionally when source is.
3648 +     */
3649 +    public void testMinimalCompletionStage2() {
3650 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3651 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3652 +        AtomicInteger x = new AtomicInteger(0);
3653 +        AtomicReference<Throwable> r = new AtomicReference<>();
3654 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3655 +        checkIncomplete(f);
3656 +        CFException ex = new CFException();
3657 +        f.completeExceptionally(ex);
3658 +        checkCompletedExceptionally(f, ex);
3659 +        assertEquals(x.get(), 0);
3660 +        assertEquals(r.get().getCause(), ex);
3661 +    }
3662 +
3663 +    /**
3664 +     * failedStage returns a CompletionStage completed
3665 +     * exceptionally with the given Exception
3666 +     */
3667 +    public void testFailedStage() {
3668 +        CFException ex = new CFException();
3669 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3670 +        AtomicInteger x = new AtomicInteger(0);
3671 +        AtomicReference<Throwable> r = new AtomicReference<>();
3672 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3673 +        assertEquals(x.get(), 0);
3674 +        assertEquals(r.get(), ex);
3675 +    }
3676 +
3677 +    /**
3678 +     * completeAsync completes with value of given supplier
3679 +     */
3680 +    public void testCompleteAsync() {
3681 +        for (Integer v1 : new Integer[] { 1, null })
3682 +    {
3683 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3684 +        f.completeAsync(() -> v1);
3685 +        f.join();
3686 +        checkCompletedNormally(f, v1);
3687 +    }}
3688 +
3689 +    /**
3690 +     * completeAsync completes exceptionally if given supplier throws
3691 +     */
3692 +    public void testCompleteAsync2() {
3693 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3694 +        CFException ex = new CFException();
3695 +        f.completeAsync(() -> { throw ex; });
3696 +        try {
3697 +            f.join();
3698 +            shouldThrow();
3699 +        } catch (CompletionException success) {}
3700 +        checkCompletedWithWrappedException(f, ex);
3701 +    }
3702 +
3703 +    /**
3704 +     * completeAsync with given executor completes with value of given supplier
3705 +     */
3706 +    public void testCompleteAsync3() {
3707 +        for (Integer v1 : new Integer[] { 1, null })
3708 +    {
3709 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3710 +        ThreadExecutor executor = new ThreadExecutor();
3711 +        f.completeAsync(() -> v1, executor);
3712 +        assertSame(v1, f.join());
3713 +        checkCompletedNormally(f, v1);
3714 +        assertEquals(1, executor.count.get());
3715 +    }}
3716 +
3717 +    /**
3718 +     * completeAsync with given executor completes exceptionally if
3719 +     * given supplier throws
3720 +     */
3721 +    public void testCompleteAsync4() {
3722 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3723 +        CFException ex = new CFException();
3724 +        ThreadExecutor executor = new ThreadExecutor();
3725 +        f.completeAsync(() -> { throw ex; }, executor);
3726 +        try {
3727 +            f.join();
3728 +            shouldThrow();
3729 +        } catch (CompletionException success) {}
3730 +        checkCompletedWithWrappedException(f, ex);
3731 +        assertEquals(1, executor.count.get());
3732 +    }
3733 +
3734 +    /**
3735 +     * orTimeout completes with TimeoutException if not complete
3736 +     */
3737 +    public void testOrTimeout_timesOut() {
3738 +        long timeoutMillis = timeoutMillis();
3739 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3740 +        long startTime = System.nanoTime();
3741 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3742 +        checkCompletedWithTimeoutException(f);
3743 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3744 +    }
3745 +
3746 +    /**
3747 +     * orTimeout completes normally if completed before timeout
3748 +     */
3749 +    public void testOrTimeout_completed() {
3750 +        for (Integer v1 : new Integer[] { 1, null })
3751 +    {
3752 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3753 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3754 +        long startTime = System.nanoTime();
3755 +        f.complete(v1);
3756 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3757 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3758 +        g.complete(v1);
3759 +        checkCompletedNormally(f, v1);
3760          checkCompletedNormally(g, v1);
3761 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3762 +    }}
3763 +
3764 +    /**
3765 +     * completeOnTimeout completes with given value if not complete
3766 +     */
3767 +    public void testCompleteOnTimeout_timesOut() {
3768 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3769 +                       () -> testCompleteOnTimeout_timesOut(null));
3770 +    }
3771 +
3772 +    /**
3773 +     * completeOnTimeout completes with given value if not complete
3774 +     */
3775 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3776 +        long timeoutMillis = timeoutMillis();
3777 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3778 +        long startTime = System.nanoTime();
3779 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3780 +        assertSame(v, f.join());
3781 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3782 +        f.complete(99);         // should have no effect
3783 +        checkCompletedNormally(f, v);
3784 +    }
3785 +
3786 +    /**
3787 +     * completeOnTimeout has no effect if completed within timeout
3788 +     */
3789 +    public void testCompleteOnTimeout_completed() {
3790 +        for (Integer v1 : new Integer[] { 1, null })
3791 +    {
3792 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3793 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3794 +        long startTime = System.nanoTime();
3795 +        f.complete(v1);
3796 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3797 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3798 +        g.complete(v1);
3799          checkCompletedNormally(f, v1);
3800 <        assertEquals(1, a.get());
3800 >        checkCompletedNormally(g, v1);
3801 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3802      }}
3803  
3804      /**
3805 <     * whenComplete action executes on exceptional completion, propagating
3469 <     * source result.
3805 >     * delayedExecutor returns an executor that delays submission
3806       */
3807 <    public void testWhenComplete_exceptionalCompletion() {
3807 >    public void testDelayedExecutor() {
3808 >        testInParallel(() -> testDelayedExecutor(null, null),
3809 >                       () -> testDelayedExecutor(null, 1),
3810 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3811 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3812 >    }
3813 >
3814 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3815 >        long timeoutMillis = timeoutMillis();
3816 >        // Use an "unreasonably long" long timeout to catch lingering threads
3817 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3818 >        final Executor delayer, longDelayer;
3819 >        if (executor == null) {
3820 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3821 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3822 >        } else {
3823 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3824 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3825 >        }
3826 >        long startTime = System.nanoTime();
3827 >        CompletableFuture<Integer> f =
3828 >            CompletableFuture.supplyAsync(() -> v, delayer);
3829 >        CompletableFuture<Integer> g =
3830 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3831 >
3832 >        assertNull(g.getNow(null));
3833 >
3834 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3835 >        long millisElapsed = millisElapsedSince(startTime);
3836 >        assertTrue(millisElapsed >= timeoutMillis);
3837 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3838 >
3839 >        checkCompletedNormally(f, v);
3840 >
3841 >        checkIncomplete(g);
3842 >        assertTrue(g.cancel(true));
3843 >    }
3844 >
3845 >    //--- tests of implementation details; not part of official tck ---
3846 >
3847 >    Object resultOf(CompletableFuture<?> f) {
3848 >        SecurityManager sm = System.getSecurityManager();
3849 >        if (sm != null) {
3850 >            try {
3851 >                System.setSecurityManager(null);
3852 >            } catch (SecurityException giveUp) {
3853 >                return "Reflection not available";
3854 >            }
3855 >        }
3856 >
3857 >        try {
3858 >            java.lang.reflect.Field resultField
3859 >                = CompletableFuture.class.getDeclaredField("result");
3860 >            resultField.setAccessible(true);
3861 >            return resultField.get(f);
3862 >        } catch (Throwable t) {
3863 >            throw new AssertionError(t);
3864 >        } finally {
3865 >            if (sm != null) System.setSecurityManager(sm);
3866 >        }
3867 >    }
3868 >
3869 >    public void testExceptionPropagationReusesResultObject() {
3870 >        if (!testImplementationDetails) return;
3871          for (ExecutionMode m : ExecutionMode.values())
3872 +    {
3873 +        final CFException ex = new CFException();
3874 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3875 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3876 +
3877 +        final Runnable noopRunnable = new Noop(m);
3878 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3879 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
3880 +
3881 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3882 +            = new ArrayList<>();
3883 +
3884 +        funs.add(y -> m.thenRun(y, noopRunnable));
3885 +        funs.add(y -> m.thenAccept(y, noopConsumer));
3886 +        funs.add(y -> m.thenApply(y, incFunction));
3887 +
3888 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
3889 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
3890 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
3891 +
3892 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
3893 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
3894 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3895 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3896 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
3897 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
3898 +
3899 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3900 +
3901 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
3902 +
3903 +        funs.add(y -> CompletableFuture.allOf(y));
3904 +        funs.add(y -> CompletableFuture.allOf(y, v42));
3905 +        funs.add(y -> CompletableFuture.allOf(v42, y));
3906 +        funs.add(y -> CompletableFuture.anyOf(y));
3907 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
3908 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
3909 +
3910 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3911 +                 fun : funs) {
3912 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3913 +            f.completeExceptionally(ex);
3914 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3915 +            checkCompletedWithWrappedException(src, ex);
3916 +            CompletableFuture<?> dep = fun.apply(src);
3917 +            checkCompletedWithWrappedException(dep, ex);
3918 +            assertSame(resultOf(src), resultOf(dep));
3919 +        }
3920 +
3921 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3922 +                 fun : funs) {
3923 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3924 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3925 +            CompletableFuture<?> dep = fun.apply(src);
3926 +            f.completeExceptionally(ex);
3927 +            checkCompletedWithWrappedException(src, ex);
3928 +            checkCompletedWithWrappedException(dep, ex);
3929 +            assertSame(resultOf(src), resultOf(dep));
3930 +        }
3931 +
3932 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3933 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3934 +                 fun : funs) {
3935 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3936 +            f.cancel(mayInterruptIfRunning);
3937 +            checkCancelled(f);
3938 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3939 +            checkCompletedWithWrappedCancellationException(src);
3940 +            CompletableFuture<?> dep = fun.apply(src);
3941 +            checkCompletedWithWrappedCancellationException(dep);
3942 +            assertSame(resultOf(src), resultOf(dep));
3943 +        }
3944 +
3945 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3946 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3947 +                 fun : funs) {
3948 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3949 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3950 +            CompletableFuture<?> dep = fun.apply(src);
3951 +            f.cancel(mayInterruptIfRunning);
3952 +            checkCancelled(f);
3953 +            checkCompletedWithWrappedCancellationException(src);
3954 +            checkCompletedWithWrappedCancellationException(dep);
3955 +            assertSame(resultOf(src), resultOf(dep));
3956 +        }
3957 +    }}
3958 +
3959 +    /**
3960 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
3961 +     */
3962 +    public void testMinimalCompletionStage_minimality() {
3963 +        if (!testImplementationDetails) return;
3964 +        Function<Method, String> toSignature =
3965 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
3966 +        Predicate<Method> isNotStatic =
3967 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
3968 +        List<Method> minimalMethods =
3969 +            Stream.of(Object.class, CompletionStage.class)
3970 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
3971 +            .filter(isNotStatic)
3972 +            .collect(Collectors.toList());
3973 +        // Methods from CompletableFuture permitted NOT to throw UOE
3974 +        String[] signatureWhitelist = {
3975 +            "newIncompleteFuture[]",
3976 +            "defaultExecutor[]",
3977 +            "minimalCompletionStage[]",
3978 +            "copy[]",
3979 +        };
3980 +        Set<String> permittedMethodSignatures =
3981 +            Stream.concat(minimalMethods.stream().map(toSignature),
3982 +                          Stream.of(signatureWhitelist))
3983 +            .collect(Collectors.toSet());
3984 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3985 +            .filter(isNotStatic)
3986 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3987 +            .collect(Collectors.toList());
3988 +
3989 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
3990 +        CompletionStage<Integer> min =
3991 +            new CompletableFuture<Integer>().minimalCompletionStage();
3992 +        stages.add(min);
3993 +        stages.add(min.thenApply(x -> x));
3994 +        stages.add(CompletableFuture.completedStage(1));
3995 +        stages.add(CompletableFuture.failedStage(new CFException()));
3996 +
3997 +        List<Method> bugs = new ArrayList<>();
3998 +        for (Method method : allMethods) {
3999 +            Class<?>[] parameterTypes = method.getParameterTypes();
4000 +            Object[] args = new Object[parameterTypes.length];
4001 +            // Manufacture boxed primitives for primitive params
4002 +            for (int i = 0; i < args.length; i++) {
4003 +                Class<?> type = parameterTypes[i];
4004 +                if (parameterTypes[i] == boolean.class)
4005 +                    args[i] = false;
4006 +                else if (parameterTypes[i] == int.class)
4007 +                    args[i] = 0;
4008 +                else if (parameterTypes[i] == long.class)
4009 +                    args[i] = 0L;
4010 +            }
4011 +            for (CompletionStage<Integer> stage : stages) {
4012 +                try {
4013 +                    method.invoke(stage, args);
4014 +                    bugs.add(method);
4015 +                }
4016 +                catch (java.lang.reflect.InvocationTargetException expected) {
4017 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4018 +                        bugs.add(method);
4019 +                        // expected.getCause().printStackTrace();
4020 +                    }
4021 +                }
4022 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4023 +            }
4024 +        }
4025 +        if (!bugs.isEmpty())
4026 +            throw new Error("Methods did not throw UOE: " + bugs);
4027 +    }
4028 +
4029 +    /**
4030 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4031 +     * is completed normally, with the same value, when source is.
4032 +     */
4033 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4034          for (boolean createIncomplete : new boolean[] { true, false })
4035          for (Integer v1 : new Integer[] { 1, null })
4036      {
4037 <        final AtomicInteger a = new AtomicInteger(0);
4038 <        final CFException ex = new CFException();
4039 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4040 <        if (!createIncomplete) f.completeExceptionally(ex);
4041 <        final CompletableFuture<Integer> g = m.whenComplete
4042 <            (f,
4043 <             (Integer x, Throwable t) -> {
4044 <                threadAssertNull(x);
4045 <                threadAssertSame(t, ex);
4046 <                a.getAndIncrement();
4047 <            });
3487 <        if (createIncomplete) f.completeExceptionally(ex);
3488 <        checkCompletedWithWrappedCFException(f, ex);
3489 <        checkCompletedWithWrappedCFException(g, ex);
3490 <        assertEquals(1, a.get());
4037 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4038 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4039 >        if (!createIncomplete) assertTrue(f.complete(v1));
4040 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4041 >        if (createIncomplete) {
4042 >            checkIncomplete(f);
4043 >            checkIncomplete(g);
4044 >            assertTrue(f.complete(v1));
4045 >        }
4046 >        checkCompletedNormally(f, v1);
4047 >        checkCompletedNormally(g, v1);
4048      }}
4049  
4050      /**
4051 <     * whenComplete action executes on cancelled source, propagating
4052 <     * CancellationException.
4051 >     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4052 >     * is completed exceptionally when source is.
4053       */
4054 <    public void testWhenComplete_sourceCancelled() {
3498 <        for (ExecutionMode m : ExecutionMode.values())
3499 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4054 >    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4055          for (boolean createIncomplete : new boolean[] { true, false })
4056      {
4057 <        final AtomicInteger a = new AtomicInteger(0);
4058 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4059 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4060 <        final CompletableFuture<Integer> g = m.whenComplete
4061 <            (f,
4062 <             (Integer x, Throwable t) -> {
4063 <                threadAssertNull(x);
4064 <                threadAssertTrue(t instanceof CancellationException);
4065 <                a.getAndIncrement();
4066 <            });
4067 <        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4057 >        CFException ex = new CFException();
4058 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4059 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4060 >        if (!createIncomplete) f.completeExceptionally(ex);
4061 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4062 >        if (createIncomplete) {
4063 >            checkIncomplete(f);
4064 >            checkIncomplete(g);
4065 >            f.completeExceptionally(ex);
4066 >        }
4067 >        checkCompletedExceptionally(f, ex);
4068 >        checkCompletedWithWrappedException(g, ex);
4069 >    }}
4070  
4071 <        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
4072 <        checkCompletedWithWrappedCancellationException(g);
4073 <        checkCancelled(f);
4074 <        assertEquals(1, a.get());
4071 >    /**
4072 >     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4073 >     */
4074 >    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4075 >        for (Integer v1 : new Integer[] { 1, null })
4076 >    {
4077 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4078 >        CompletionStage minimal = f.minimalCompletionStage();
4079 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4080 >        assertTrue(g.complete(v1));
4081 >        checkCompletedNormally(g, v1);
4082 >        checkIncomplete(f);
4083 >        checkIncomplete(minimal.toCompletableFuture());
4084      }}
4085  
4086      /**
4087 <     * If a whenComplete action throws an exception when triggered by
3522 <     * a normal completion, it completes exceptionally
4087 >     * minimalStage.toCompletableFuture().join() awaits completion
4088       */
4089 <    public void testWhenComplete_actionFailed() {
4089 >    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4090          for (boolean createIncomplete : new boolean[] { true, false })
3526        for (ExecutionMode m : ExecutionMode.values())
4091          for (Integer v1 : new Integer[] { 1, null })
4092      {
4093 <        final AtomicInteger a = new AtomicInteger(0);
4094 <        final CFException ex = new CFException();
4095 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4096 <        if (!createIncomplete) f.complete(v1);
4097 <        final CompletableFuture<Integer> g = m.whenComplete
4098 <            (f,
4099 <             (Integer x, Throwable t) -> {
3536 <                threadAssertSame(x, v1);
3537 <                threadAssertNull(t);
3538 <                a.getAndIncrement();
3539 <                throw ex;
3540 <            });
3541 <        if (createIncomplete) f.complete(v1);
3542 <        checkCompletedNormally(f, v1);
3543 <        checkCompletedWithWrappedCFException(g, ex);
3544 <        assertEquals(1, a.get());
4093 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4094 >        if (!createIncomplete) assertTrue(f.complete(v1));
4095 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4096 >        if (createIncomplete) assertTrue(f.complete(v1));
4097 >        assertEquals(v1, minimal.toCompletableFuture().join());
4098 >        assertEquals(v1, minimal.toCompletableFuture().get());
4099 >        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4100      }}
4101  
4102      /**
4103 <     * If a whenComplete action throws an exception when triggered by
4104 <     * a source completion that also throws an exception, the source
4105 <     * exception takes precedence.
4103 >     * Completion of a toCompletableFuture copy of a minimal stage
4104 >     * does not complete its source.
4105 >     */
4106 >    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4107 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4108 >        CompletionStage<Integer> g = f.minimalCompletionStage();
4109 >        assertTrue(g.toCompletableFuture().complete(1));
4110 >        assertTrue(g.toCompletableFuture().complete(null));
4111 >        assertTrue(g.toCompletableFuture().cancel(true));
4112 >        assertTrue(g.toCompletableFuture().cancel(false));
4113 >        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4114 >        checkIncomplete(g.toCompletableFuture());
4115 >        f.complete(1);
4116 >        checkCompletedNormally(g.toCompletableFuture(), 1);
4117 >    }
4118 >
4119 >    /** Demo utility method for external reliable toCompletableFuture */
4120 >    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4121 >        CompletableFuture<T> f = new CompletableFuture<>();
4122 >        stage.handle((T t, Throwable ex) -> {
4123 >                         if (ex != null) f.completeExceptionally(ex);
4124 >                         else f.complete(t);
4125 >                         return null;
4126 >                     });
4127 >        return f;
4128 >    }
4129 >
4130 >    /** Demo utility method to join a CompletionStage */
4131 >    static <T> T join(CompletionStage<T> stage) {
4132 >        return toCompletableFuture(stage).join();
4133 >    }
4134 >
4135 >    /**
4136 >     * Joining a minimal stage "by hand" works
4137       */
4138 <    public void testWhenComplete_actionFailedSourceFailed() {
4138 >    public void testMinimalCompletionStage_join_by_hand() {
4139          for (boolean createIncomplete : new boolean[] { true, false })
3554        for (ExecutionMode m : ExecutionMode.values())
4140          for (Integer v1 : new Integer[] { 1, null })
4141      {
4142 <        final AtomicInteger a = new AtomicInteger(0);
4143 <        final CFException ex1 = new CFException();
4144 <        final CFException ex2 = new CFException();
4145 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4142 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4143 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4144 >        CompletableFuture<Integer> g = new CompletableFuture<>();
4145 >        if (!createIncomplete) assertTrue(f.complete(v1));
4146 >        minimal.thenAccept(x -> g.complete(x));
4147 >        if (createIncomplete) assertTrue(f.complete(v1));
4148 >        g.join();
4149 >        checkCompletedNormally(g, v1);
4150 >        checkCompletedNormally(f, v1);
4151 >        assertEquals(v1, join(minimal));
4152 >    }}
4153  
4154 <        if (!createIncomplete) f.completeExceptionally(ex1);
4155 <        final CompletableFuture<Integer> g = m.whenComplete
4156 <            (f,
4157 <             (Integer x, Throwable t) -> {
4158 <                threadAssertSame(t, ex1);
4159 <                threadAssertNull(x);
4160 <                a.getAndIncrement();
4161 <                throw ex2;
4162 <            });
4163 <        if (createIncomplete) f.completeExceptionally(ex1);
4154 >    static class Monad {
4155 >        static class ZeroException extends RuntimeException {
4156 >            public ZeroException() { super("monadic zero"); }
4157 >        }
4158 >        // "return", "unit"
4159 >        static <T> CompletableFuture<T> unit(T value) {
4160 >            return completedFuture(value);
4161 >        }
4162 >        // monadic zero ?
4163 >        static <T> CompletableFuture<T> zero() {
4164 >            return failedFuture(new ZeroException());
4165 >        }
4166 >        // >=>
4167 >        static <T,U,V> Function<T, CompletableFuture<V>> compose
4168 >            (Function<T, CompletableFuture<U>> f,
4169 >             Function<U, CompletableFuture<V>> g) {
4170 >            return x -> f.apply(x).thenCompose(g);
4171 >        }
4172  
4173 <        checkCompletedWithWrappedCFException(f, ex1);
4174 <        checkCompletedWithWrappedCFException(g, ex1);
4175 <        assertEquals(1, a.get());
4173 >        static void assertZero(CompletableFuture<?> f) {
4174 >            try {
4175 >                f.getNow(null);
4176 >                throw new AssertionFailedError("should throw");
4177 >            } catch (CompletionException success) {
4178 >                assertTrue(success.getCause() instanceof ZeroException);
4179 >            }
4180 >        }
4181 >
4182 >        static <T> void assertFutureEquals(CompletableFuture<T> f,
4183 >                                           CompletableFuture<T> g) {
4184 >            T fval = null, gval = null;
4185 >            Throwable fex = null, gex = null;
4186 >
4187 >            try { fval = f.get(); }
4188 >            catch (ExecutionException ex) { fex = ex.getCause(); }
4189 >            catch (Throwable ex) { fex = ex; }
4190 >
4191 >            try { gval = g.get(); }
4192 >            catch (ExecutionException ex) { gex = ex.getCause(); }
4193 >            catch (Throwable ex) { gex = ex; }
4194 >
4195 >            if (fex != null || gex != null)
4196 >                assertSame(fex.getClass(), gex.getClass());
4197 >            else
4198 >                assertEquals(fval, gval);
4199 >        }
4200 >
4201 >        static class PlusFuture<T> extends CompletableFuture<T> {
4202 >            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4203 >        }
4204 >
4205 >        /** Implements "monadic plus". */
4206 >        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4207 >                                             CompletableFuture<? extends T> g) {
4208 >            PlusFuture<T> plus = new PlusFuture<T>();
4209 >            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4210 >                try {
4211 >                    if (ex == null) {
4212 >                        if (plus.complete(result))
4213 >                            if (plus.firstFailure.get() != null)
4214 >                                plus.firstFailure.set(null);
4215 >                    }
4216 >                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4217 >                        if (plus.isDone())
4218 >                            plus.firstFailure.set(null);
4219 >                    }
4220 >                    else {
4221 >                        // first failure has precedence
4222 >                        Throwable first = plus.firstFailure.getAndSet(null);
4223 >
4224 >                        // may fail with "Self-suppression not permitted"
4225 >                        try { first.addSuppressed(ex); }
4226 >                        catch (Exception ignored) {}
4227 >
4228 >                        plus.completeExceptionally(first);
4229 >                    }
4230 >                } catch (Throwable unexpected) {
4231 >                    plus.completeExceptionally(unexpected);
4232 >                }
4233 >            };
4234 >            f.whenComplete(action);
4235 >            g.whenComplete(action);
4236 >            return plus;
4237 >        }
4238 >    }
4239 >
4240 >    /**
4241 >     * CompletableFuture is an additive monad - sort of.
4242 >     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4243 >     */
4244 >    public void testAdditiveMonad() throws Throwable {
4245 >        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4246 >        CompletableFuture<Long> zero = Monad.zero();
4247 >
4248 >        // Some mutually non-commutative functions
4249 >        Function<Long, CompletableFuture<Long>> triple
4250 >            = x -> Monad.unit(3 * x);
4251 >        Function<Long, CompletableFuture<Long>> inc
4252 >            = x -> Monad.unit(x + 1);
4253 >
4254 >        // unit is a right identity: m >>= unit === m
4255 >        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4256 >                                 inc.apply(5L));
4257 >        // unit is a left identity: (unit x) >>= f === f x
4258 >        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4259 >                                 inc.apply(5L));
4260 >
4261 >        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4262 >        Monad.assertFutureEquals(
4263 >            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4264 >            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4265 >
4266 >        // The case for CompletableFuture as an additive monad is weaker...
4267 >
4268 >        // zero is a monadic zero
4269 >        Monad.assertZero(zero);
4270 >
4271 >        // left zero: zero >>= f === zero
4272 >        Monad.assertZero(zero.thenCompose(inc));
4273 >        // right zero: f >>= (\x -> zero) === zero
4274 >        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4275 >
4276 >        // f plus zero === f
4277 >        Monad.assertFutureEquals(Monad.unit(5L),
4278 >                                 Monad.plus(Monad.unit(5L), zero));
4279 >        // zero plus f === f
4280 >        Monad.assertFutureEquals(Monad.unit(5L),
4281 >                                 Monad.plus(zero, Monad.unit(5L)));
4282 >        // zero plus zero === zero
4283 >        Monad.assertZero(Monad.plus(zero, zero));
4284 >        {
4285 >            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4286 >                                                   Monad.unit(8L));
4287 >            // non-determinism
4288 >            assertTrue(f.get() == 5L || f.get() == 8L);
4289 >        }
4290 >
4291 >        CompletableFuture<Long> godot = new CompletableFuture<>();
4292 >        // f plus godot === f (doesn't wait for godot)
4293 >        Monad.assertFutureEquals(Monad.unit(5L),
4294 >                                 Monad.plus(Monad.unit(5L), godot));
4295 >        // godot plus f === f (doesn't wait for godot)
4296 >        Monad.assertFutureEquals(Monad.unit(5L),
4297 >                                 Monad.plus(godot, Monad.unit(5L)));
4298 >    }
4299 >
4300 >    /** Test long recursive chains of CompletableFutures with cascading completions */
4301 >    @SuppressWarnings("FutureReturnValueIgnored")
4302 >    public void testRecursiveChains() throws Throwable {
4303 >        for (ExecutionMode m : ExecutionMode.values())
4304 >        for (boolean addDeadEnds : new boolean[] { true, false })
4305 >    {
4306 >        final int val = 42;
4307 >        final int n = expensiveTests ? 1_000 : 2;
4308 >        CompletableFuture<Integer> head = new CompletableFuture<>();
4309 >        CompletableFuture<Integer> tail = head;
4310 >        for (int i = 0; i < n; i++) {
4311 >            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4312 >            tail = m.thenApply(tail, v -> v + 1);
4313 >            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4314 >            tail = m.applyToEither(tail, tail, v -> v + 1);
4315 >            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4316 >            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4317 >        }
4318 >        head.complete(val);
4319 >        assertEquals(val + 3 * n, (int) tail.join());
4320      }}
4321  
4322 +    /**
4323 +     * A single CompletableFuture with many dependents.
4324 +     * A demo of scalability - runtime is O(n).
4325 +     */
4326 +    @SuppressWarnings("FutureReturnValueIgnored")
4327 +    public void testManyDependents() throws Throwable {
4328 +        final int n = expensiveTests ? 1_000_000 : 10;
4329 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4330 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4331 +        final AtomicInteger count = new AtomicInteger(0);
4332 +        for (int i = 0; i < n; i++) {
4333 +            head.thenRun(() -> count.getAndIncrement());
4334 +            head.thenAccept(x -> count.getAndIncrement());
4335 +            head.thenApply(x -> count.getAndIncrement());
4336 +
4337 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4338 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4339 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4340 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4341 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4342 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4343 +
4344 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4345 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4346 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4347 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4348 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4349 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4350 +        }
4351 +        head.complete(null);
4352 +        assertEquals(5 * 3 * n, count.get());
4353 +    }
4354 +
4355 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4356 +    @SuppressWarnings("FutureReturnValueIgnored")
4357 +    public void testCoCompletionGarbageRetention() throws Throwable {
4358 +        final int n = expensiveTests ? 1_000_000 : 10;
4359 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4360 +        CompletableFuture<Integer> f;
4361 +        for (int i = 0; i < n; i++) {
4362 +            f = new CompletableFuture<>();
4363 +            f.runAfterEither(incomplete, () -> {});
4364 +            f.complete(null);
4365 +
4366 +            f = new CompletableFuture<>();
4367 +            f.acceptEither(incomplete, x -> {});
4368 +            f.complete(null);
4369 +
4370 +            f = new CompletableFuture<>();
4371 +            f.applyToEither(incomplete, x -> x);
4372 +            f.complete(null);
4373 +
4374 +            f = new CompletableFuture<>();
4375 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4376 +            f.complete(null);
4377 +        }
4378 +
4379 +        for (int i = 0; i < n; i++) {
4380 +            f = new CompletableFuture<>();
4381 +            incomplete.runAfterEither(f, () -> {});
4382 +            f.complete(null);
4383 +
4384 +            f = new CompletableFuture<>();
4385 +            incomplete.acceptEither(f, x -> {});
4386 +            f.complete(null);
4387 +
4388 +            f = new CompletableFuture<>();
4389 +            incomplete.applyToEither(f, x -> x);
4390 +            f.complete(null);
4391 +
4392 +            f = new CompletableFuture<>();
4393 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4394 +            f.complete(null);
4395 +        }
4396 +    }
4397 +
4398 +    /**
4399 +     * Reproduction recipe for:
4400 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4401 +     * cvs update -D '2016-05-01' ./src/main/java/util/concurrent/CompletableFuture.java && ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testAnyOfGarbageRetention tck; cvs update -A
4402 +     */
4403 +    public void testAnyOfGarbageRetention() throws Throwable {
4404 +        for (Integer v : new Integer[] { 1, null })
4405 +    {
4406 +        final int n = expensiveTests ? 100_000 : 10;
4407 +        CompletableFuture<Integer>[] fs
4408 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4409 +        for (int i = 0; i < fs.length; i++)
4410 +            fs[i] = new CompletableFuture<>();
4411 +        fs[fs.length - 1].complete(v);
4412 +        for (int i = 0; i < n; i++)
4413 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4414 +    }}
4415 +
4416 +    /**
4417 +     * Checks for garbage retention with allOf.
4418 +     *
4419 +     * As of 2016-07, fails with OOME:
4420 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4421 +     */
4422 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4423 +        final int n = expensiveTests ? 100_000 : 10;
4424 +        CompletableFuture<Integer>[] fs
4425 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4426 +        for (int i = 0; i < fs.length; i++)
4427 +            fs[i] = new CompletableFuture<>();
4428 +        for (int i = 0; i < n; i++)
4429 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4430 +    }
4431 +
4432 +    /**
4433 +     * Checks for garbage retention when a dependent future is
4434 +     * cancelled and garbage-collected.
4435 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4436 +     *
4437 +     * As of 2016-07, fails with OOME:
4438 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4439 +     */
4440 +    public void testCancelledGarbageRetention() throws Throwable {
4441 +        final int n = expensiveTests ? 100_000 : 10;
4442 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4443 +        for (int i = 0; i < n; i++)
4444 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4445 +    }
4446 +
4447 +    /**
4448 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4449 +     * is invoked many times.
4450 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4451 +     *
4452 +     * As of 2016-07, fails with OOME:
4453 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4454 +     */
4455 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4456 +        final int n = expensiveTests ? 900_000 : 10;
4457 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4458 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4459 +        for (int i = 0; i < n; i++)
4460 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4461 +    }
4462 +
4463 + //     static <U> U join(CompletionStage<U> stage) {
4464 + //         CompletableFuture<U> f = new CompletableFuture<>();
4465 + //         stage.whenComplete((v, ex) -> {
4466 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4467 + //         });
4468 + //         return f.join();
4469 + //     }
4470 +
4471 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4472 + //         CompletableFuture<U> f = new CompletableFuture<>();
4473 + //         stage.whenComplete((v, ex) -> {
4474 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4475 + //         });
4476 + //         return f.isDone();
4477 + //     }
4478 +
4479 + //     static <U> U join2(CompletionStage<U> stage) {
4480 + //         return stage.toCompletableFuture().copy().join();
4481 + //     }
4482 +
4483 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4484 + //         return stage.toCompletableFuture().copy().isDone();
4485 + //     }
4486 +
4487   }

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines