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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.43 by jsr166, Mon Jun 2 04:13:54 2014 UTC vs.
Revision 1.134 by jsr166, Sun Nov 15 19:55:38 2015 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.TimeoutException;
34 + import java.util.concurrent.TimeUnit;
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); }
# 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());
79          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 73 | Line 89 | public class CompletableFutureTest exten
89          assertTrue(f.toString().contains("[Completed normally]"));
90      }
91  
92 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93 <        try {
94 <            f.get(LONG_DELAY_MS, MILLISECONDS);
95 <            shouldThrow();
96 <        } catch (ExecutionException success) {
97 <            assertTrue(success.getCause() instanceof CFException);
98 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
99 <        try {
100 <            f.join();
101 <            shouldThrow();
102 <        } catch (CompletionException success) {
103 <            assertTrue(success.getCause() instanceof CFException);
104 <        }
105 <        try {
106 <            f.getNow(null);
107 <            shouldThrow();
108 <        } catch (CompletionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
92 >    /**
93 >     * Returns the "raw" internal exceptional completion of f,
94 >     * without any additional wrapping with CompletionException.
95 >     */
96 >    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
97 >        // handle (and whenComplete) can distinguish between "direct"
98 >        // and "wrapped" exceptional completion
99 >        return f.handle((U u, Throwable t) -> t).join();
100 >    }
101 >
102 >    void checkCompletedExceptionally(CompletableFuture<?> f,
103 >                                     boolean wrapped,
104 >                                     Consumer<Throwable> checker) {
105 >        Throwable cause = exceptionalCompletion(f);
106 >        if (wrapped) {
107 >            assertTrue(cause instanceof CompletionException);
108 >            cause = cause.getCause();
109          }
110 <        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 <    }
110 >        checker.accept(cause);
111  
112 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
107 <                                              CFException ex) {
112 >        long startTime = System.nanoTime();
113          try {
114              f.get(LONG_DELAY_MS, MILLISECONDS);
115              shouldThrow();
116          } catch (ExecutionException success) {
117 <            assertSame(ex, success.getCause());
117 >            assertSame(cause, success.getCause());
118          } catch (Throwable fail) { threadUnexpectedException(fail); }
119 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
120 +
121          try {
122              f.join();
123              shouldThrow();
124          } catch (CompletionException success) {
125 <            assertSame(ex, success.getCause());
126 <        }
125 >            assertSame(cause, success.getCause());
126 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
127 >
128          try {
129              f.getNow(null);
130              shouldThrow();
131          } catch (CompletionException success) {
132 <            assertSame(ex, success.getCause());
133 <        }
132 >            assertSame(cause, success.getCause());
133 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
134 >
135          try {
136              f.get();
137              shouldThrow();
138          } catch (ExecutionException success) {
139 <            assertSame(ex, success.getCause());
139 >            assertSame(cause, success.getCause());
140          } catch (Throwable fail) { threadUnexpectedException(fail); }
141 <        assertTrue(f.isDone());
141 >
142          assertFalse(f.isCancelled());
143 +        assertTrue(f.isDone());
144 +        assertTrue(f.isCompletedExceptionally());
145          assertTrue(f.toString().contains("[Completed exceptionally]"));
146      }
147  
148 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149 +        checkCompletedExceptionally(f, true,
150 +            (t) -> assertTrue(t instanceof CFException));
151 +    }
152 +
153 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154 +        checkCompletedExceptionally(f, true,
155 +            (t) -> assertTrue(t instanceof CancellationException));
156 +    }
157 +
158 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159 +        checkCompletedExceptionally(f, false,
160 +            (t) -> assertTrue(t instanceof TimeoutException));
161 +    }
162 +
163 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
164 +                                            Throwable ex) {
165 +        checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
166 +    }
167 +
168 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
169 +        checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
170 +    }
171 +
172      void checkCancelled(CompletableFuture<?> f) {
173 +        long startTime = System.nanoTime();
174          try {
175              f.get(LONG_DELAY_MS, MILLISECONDS);
176              shouldThrow();
177          } catch (CancellationException success) {
178          } catch (Throwable fail) { threadUnexpectedException(fail); }
179 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180 +
181          try {
182              f.join();
183              shouldThrow();
# Line 153 | Line 191 | public class CompletableFutureTest exten
191              shouldThrow();
192          } catch (CancellationException success) {
193          } 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    }
194  
195 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
196 <        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); }
195 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196 >
197          assertTrue(f.isDone());
188        assertFalse(f.isCancelled());
198          assertTrue(f.isCompletedExceptionally());
199 +        assertTrue(f.isCancelled());
200          assertTrue(f.toString().contains("[Completed exceptionally]"));
201      }
202  
# Line 204 | Line 214 | public class CompletableFutureTest exten
214       * isCancelled, join, get, and getNow
215       */
216      public void testComplete() {
217 +        for (Integer v1 : new Integer[] { 1, null })
218 +    {
219          CompletableFuture<Integer> f = new CompletableFuture<>();
220          checkIncomplete(f);
221 <        f.complete(one);
222 <        checkCompletedNormally(f, one);
223 <    }
221 >        assertTrue(f.complete(v1));
222 >        assertFalse(f.complete(v1));
223 >        checkCompletedNormally(f, v1);
224 >    }}
225  
226      /**
227       * completeExceptionally completes exceptionally, as indicated by
# Line 216 | Line 229 | public class CompletableFutureTest exten
229       */
230      public void testCompleteExceptionally() {
231          CompletableFuture<Integer> f = new CompletableFuture<>();
232 +        CFException ex = new CFException();
233          checkIncomplete(f);
234 <        f.completeExceptionally(new CFException());
235 <        checkCompletedWithWrappedCFException(f);
234 >        f.completeExceptionally(ex);
235 >        checkCompletedExceptionally(f, ex);
236      }
237  
238      /**
# Line 226 | Line 240 | public class CompletableFutureTest exten
240       * methods isDone, isCancelled, join, get, and getNow
241       */
242      public void testCancel() {
243 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
244 +    {
245          CompletableFuture<Integer> f = new CompletableFuture<>();
246          checkIncomplete(f);
247 <        assertTrue(f.cancel(true));
247 >        assertTrue(f.cancel(mayInterruptIfRunning));
248 >        assertTrue(f.cancel(mayInterruptIfRunning));
249 >        assertTrue(f.cancel(!mayInterruptIfRunning));
250          checkCancelled(f);
251 <    }
251 >    }}
252  
253      /**
254       * obtrudeValue forces completion with given value
# Line 238 | Line 256 | public class CompletableFutureTest exten
256      public void testObtrudeValue() {
257          CompletableFuture<Integer> f = new CompletableFuture<>();
258          checkIncomplete(f);
259 <        f.complete(one);
259 >        assertTrue(f.complete(one));
260          checkCompletedNormally(f, one);
261          f.obtrudeValue(three);
262          checkCompletedNormally(f, three);
# Line 247 | Line 265 | public class CompletableFutureTest exten
265          f = new CompletableFuture<>();
266          f.obtrudeValue(three);
267          checkCompletedNormally(f, three);
268 +        f.obtrudeValue(null);
269 +        checkCompletedNormally(f, null);
270          f = new CompletableFuture<>();
271          f.completeExceptionally(new CFException());
272          f.obtrudeValue(four);
# Line 257 | Line 277 | public class CompletableFutureTest exten
277       * obtrudeException forces completion with given exception
278       */
279      public void testObtrudeException() {
280 <        CompletableFuture<Integer> f = new CompletableFuture<>();
281 <        checkIncomplete(f);
282 <        f.complete(one);
283 <        checkCompletedNormally(f, one);
284 <        f.obtrudeException(new CFException());
265 <        checkCompletedWithWrappedCFException(f);
280 >        for (Integer v1 : new Integer[] { 1, null })
281 >    {
282 >        CFException ex;
283 >        CompletableFuture<Integer> f;
284 >
285          f = new CompletableFuture<>();
286 <        f.obtrudeException(new CFException());
287 <        checkCompletedWithWrappedCFException(f);
286 >        assertTrue(f.complete(v1));
287 >        for (int i = 0; i < 2; i++) {
288 >            f.obtrudeException(ex = new CFException());
289 >            checkCompletedExceptionally(f, ex);
290 >        }
291 >
292          f = new CompletableFuture<>();
293 +        for (int i = 0; i < 2; i++) {
294 +            f.obtrudeException(ex = new CFException());
295 +            checkCompletedExceptionally(f, ex);
296 +        }
297 +
298 +        f = new CompletableFuture<>();
299 +        f.completeExceptionally(ex = new CFException());
300 +        f.obtrudeValue(v1);
301 +        checkCompletedNormally(f, v1);
302 +        f.obtrudeException(ex = new CFException());
303 +        checkCompletedExceptionally(f, ex);
304          f.completeExceptionally(new CFException());
305 <        f.obtrudeValue(four);
306 <        checkCompletedNormally(f, four);
307 <        f.obtrudeException(new CFException());
308 <        checkCompletedWithWrappedCFException(f);
275 <    }
305 >        checkCompletedExceptionally(f, ex);
306 >        assertFalse(f.complete(v1));
307 >        checkCompletedExceptionally(f, ex);
308 >    }}
309  
310      /**
311       * getNumberOfDependents returns number of dependent tasks
312       */
313      public void testGetNumberOfDependents() {
314 +        for (ExecutionMode m : ExecutionMode.values())
315 +        for (Integer v1 : new Integer[] { 1, null })
316 +    {
317          CompletableFuture<Integer> f = new CompletableFuture<>();
318 <        assertEquals(f.getNumberOfDependents(), 0);
319 <        CompletableFuture g = f.thenRun(new Noop());
320 <        assertEquals(f.getNumberOfDependents(), 1);
321 <        assertEquals(g.getNumberOfDependents(), 0);
322 <        CompletableFuture h = f.thenRun(new Noop());
323 <        assertEquals(f.getNumberOfDependents(), 2);
324 <        f.complete(1);
318 >        assertEquals(0, f.getNumberOfDependents());
319 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
320 >        assertEquals(1, f.getNumberOfDependents());
321 >        assertEquals(0, g.getNumberOfDependents());
322 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
323 >        assertEquals(2, f.getNumberOfDependents());
324 >        assertEquals(0, h.getNumberOfDependents());
325 >        assertTrue(f.complete(v1));
326          checkCompletedNormally(g, null);
327 <        assertEquals(f.getNumberOfDependents(), 0);
328 <        assertEquals(g.getNumberOfDependents(), 0);
329 <    }
327 >        checkCompletedNormally(h, null);
328 >        assertEquals(0, f.getNumberOfDependents());
329 >        assertEquals(0, g.getNumberOfDependents());
330 >        assertEquals(0, h.getNumberOfDependents());
331 >    }}
332  
333      /**
334       * toString indicates current completion state
# Line 300 | Line 339 | public class CompletableFutureTest exten
339          f = new CompletableFuture<String>();
340          assertTrue(f.toString().contains("[Not completed]"));
341  
342 <        f.complete("foo");
342 >        assertTrue(f.complete("foo"));
343          assertTrue(f.toString().contains("[Completed normally]"));
344  
345          f = new CompletableFuture<String>();
346 <        f.completeExceptionally(new IndexOutOfBoundsException());
346 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
347          assertTrue(f.toString().contains("[Completed exceptionally]"));
348 +
349 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
350 +            f = new CompletableFuture<String>();
351 +            assertTrue(f.cancel(mayInterruptIfRunning));
352 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
353 +        }
354      }
355  
356      /**
# Line 316 | Line 361 | public class CompletableFutureTest exten
361          checkCompletedNormally(f, "test");
362      }
363  
364 <    // Choose non-commutative actions for better coverage
364 >    abstract class CheckedAction {
365 >        int invocationCount = 0;
366 >        final ExecutionMode m;
367 >        CheckedAction(ExecutionMode m) { this.m = m; }
368 >        void invoked() {
369 >            m.checkExecutionMode();
370 >            assertEquals(0, invocationCount++);
371 >        }
372 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
373 >        void assertInvoked() { assertEquals(1, invocationCount); }
374 >    }
375  
376 <    // A non-commutative function that handles and produces null values as well.
377 <    static Integer subtract(Integer x, Integer y) {
378 <        return (x == null && y == null) ? null :
379 <            ((x == null) ? 42 : x.intValue())
380 <            - ((y == null) ? 99 : y.intValue());
376 >    abstract class CheckedIntegerAction extends CheckedAction {
377 >        Integer value;
378 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
379 >        void assertValue(Integer expected) {
380 >            assertInvoked();
381 >            assertEquals(expected, value);
382 >        }
383 >    }
384 >
385 >    class IntegerSupplier extends CheckedAction
386 >        implements Supplier<Integer>
387 >    {
388 >        final Integer value;
389 >        IntegerSupplier(ExecutionMode m, Integer value) {
390 >            super(m);
391 >            this.value = value;
392 >        }
393 >        public Integer get() {
394 >            invoked();
395 >            return value;
396 >        }
397      }
398  
399      // A function that handles and produces null values as well.
# Line 330 | Line 401 | public class CompletableFutureTest exten
401          return (x == null) ? null : x + 1;
402      }
403  
404 <    static final Supplier<Integer> supplyOne =
405 <        () -> Integer.valueOf(1);
406 <    static final Function<Integer, Integer> inc =
407 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
337 <    static final BiFunction<Integer, Integer, Integer> subtract =
338 <        (Integer x, Integer y) -> subtract(x, y);
339 <    static final class IncAction implements Consumer<Integer> {
340 <        int invocationCount = 0;
341 <        Integer value;
342 <        public boolean ran() { return invocationCount == 1; }
404 >    class NoopConsumer extends CheckedIntegerAction
405 >        implements Consumer<Integer>
406 >    {
407 >        NoopConsumer(ExecutionMode m) { super(m); }
408          public void accept(Integer x) {
409 <            invocationCount++;
410 <            value = inc(x);
409 >            invoked();
410 >            value = x;
411          }
412      }
413 <    static final class IncFunction implements Function<Integer,Integer> {
414 <        int invocationCount = 0;
415 <        Integer value;
416 <        public boolean ran() { return invocationCount == 1; }
413 >
414 >    class IncFunction extends CheckedIntegerAction
415 >        implements Function<Integer,Integer>
416 >    {
417 >        IncFunction(ExecutionMode m) { super(m); }
418          public Integer apply(Integer x) {
419 <            invocationCount++;
419 >            invoked();
420              return value = inc(x);
421          }
422      }
423 <    static final class SubtractAction implements BiConsumer<Integer, Integer> {
424 <        int invocationCount = 0;
425 <        Integer value;
426 <        // Check this action was invoked exactly once when result is computed.
427 <        public boolean ran() { return invocationCount == 1; }
423 >
424 >    // Choose non-commutative actions for better coverage
425 >    // A non-commutative function that handles and produces null values as well.
426 >    static Integer subtract(Integer x, Integer y) {
427 >        return (x == null && y == null) ? null :
428 >            ((x == null) ? 42 : x.intValue())
429 >            - ((y == null) ? 99 : y.intValue());
430 >    }
431 >
432 >    class SubtractAction extends CheckedIntegerAction
433 >        implements BiConsumer<Integer, Integer>
434 >    {
435 >        SubtractAction(ExecutionMode m) { super(m); }
436          public void accept(Integer x, Integer y) {
437 <            invocationCount++;
437 >            invoked();
438              value = subtract(x, y);
439          }
440      }
441 <    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
442 <        int invocationCount = 0;
443 <        Integer value;
444 <        // Check this action was invoked exactly once when result is computed.
445 <        public boolean ran() { return invocationCount == 1; }
441 >
442 >    class SubtractFunction extends CheckedIntegerAction
443 >        implements BiFunction<Integer, Integer, Integer>
444 >    {
445 >        SubtractFunction(ExecutionMode m) { super(m); }
446          public Integer apply(Integer x, Integer y) {
447 <            invocationCount++;
447 >            invoked();
448              return value = subtract(x, y);
449          }
450      }
451 <    static final class Noop implements Runnable {
452 <        int invocationCount = 0;
453 <        boolean ran;
451 >
452 >    class Noop extends CheckedAction implements Runnable {
453 >        Noop(ExecutionMode m) { super(m); }
454          public void run() {
455 <            invocationCount++;
382 <            ran = true;
455 >            invoked();
456          }
457      }
458  
459 <    static final class FailingSupplier implements Supplier<Integer> {
460 <        boolean ran;
461 <        public Integer get() { ran = true; throw new CFException(); }
459 >    class FailingSupplier extends CheckedAction
460 >        implements Supplier<Integer>
461 >    {
462 >        FailingSupplier(ExecutionMode m) { super(m); }
463 >        public Integer get() {
464 >            invoked();
465 >            throw new CFException();
466 >        }
467      }
468 <    static final class FailingConsumer implements Consumer<Integer> {
469 <        boolean ran;
470 <        public void accept(Integer x) { ran = true; throw new CFException(); }
468 >
469 >    class FailingConsumer extends CheckedIntegerAction
470 >        implements Consumer<Integer>
471 >    {
472 >        FailingConsumer(ExecutionMode m) { super(m); }
473 >        public void accept(Integer x) {
474 >            invoked();
475 >            value = x;
476 >            throw new CFException();
477 >        }
478      }
479 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
480 <        boolean ran;
481 <        public void accept(Integer x, Integer y) { ran = true; throw new CFException(); }
479 >
480 >    class FailingBiConsumer extends CheckedIntegerAction
481 >        implements BiConsumer<Integer, Integer>
482 >    {
483 >        FailingBiConsumer(ExecutionMode m) { super(m); }
484 >        public void accept(Integer x, Integer y) {
485 >            invoked();
486 >            value = subtract(x, y);
487 >            throw new CFException();
488 >        }
489      }
490 <    static final class FailingFunction implements Function<Integer, Integer> {
491 <        boolean ran;
492 <        public Integer apply(Integer x) { ran = true; throw new CFException(); }
490 >
491 >    class FailingFunction extends CheckedIntegerAction
492 >        implements Function<Integer, Integer>
493 >    {
494 >        FailingFunction(ExecutionMode m) { super(m); }
495 >        public Integer apply(Integer x) {
496 >            invoked();
497 >            value = x;
498 >            throw new CFException();
499 >        }
500      }
501 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
502 <        boolean ran;
503 <        public Integer apply(Integer x, Integer y) { ran = true; throw new CFException(); }
501 >
502 >    class FailingBiFunction extends CheckedIntegerAction
503 >        implements BiFunction<Integer, Integer, Integer>
504 >    {
505 >        FailingBiFunction(ExecutionMode m) { super(m); }
506 >        public Integer apply(Integer x, Integer y) {
507 >            invoked();
508 >            value = subtract(x, y);
509 >            throw new CFException();
510 >        }
511      }
512 <    static final class FailingNoop implements Runnable {
513 <        boolean ran;
514 <        public void run() { ran = true; throw new CFException(); }
512 >
513 >    class FailingRunnable extends CheckedAction implements Runnable {
514 >        FailingRunnable(ExecutionMode m) { super(m); }
515 >        public void run() {
516 >            invoked();
517 >            throw new CFException();
518 >        }
519      }
520  
521 <    static final class CompletableFutureInc
522 <        implements Function<Integer, CompletableFuture<Integer>> {
523 <        boolean ran;
521 >    class CompletableFutureInc extends CheckedIntegerAction
522 >        implements Function<Integer, CompletableFuture<Integer>>
523 >    {
524 >        CompletableFutureInc(ExecutionMode m) { super(m); }
525          public CompletableFuture<Integer> apply(Integer x) {
526 <            ran = true;
526 >            invoked();
527 >            value = x;
528              CompletableFuture<Integer> f = new CompletableFuture<>();
529 <            f.complete(Integer.valueOf(x.intValue() + 1));
529 >            assertTrue(f.complete(inc(x)));
530              return f;
531          }
532      }
533  
534 <    static final class FailingCompletableFutureFunction
535 <        implements Function<Integer, CompletableFuture<Integer>> {
536 <        boolean ran;
534 >    class FailingCompletableFutureFunction extends CheckedIntegerAction
535 >        implements Function<Integer, CompletableFuture<Integer>>
536 >    {
537 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
538          public CompletableFuture<Integer> apply(Integer x) {
539 <            ran = true; throw new CFException();
539 >            invoked();
540 >            value = x;
541 >            throw new CFException();
542          }
543      }
544  
545      // Used for explicit executor tests
546      static final class ThreadExecutor implements Executor {
547 <        AtomicInteger count = new AtomicInteger(0);
547 >        final AtomicInteger count = new AtomicInteger(0);
548 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
549 >        static boolean startedCurrentThread() {
550 >            return Thread.currentThread().getThreadGroup() == tg;
551 >        }
552  
553          public void execute(Runnable r) {
554              count.getAndIncrement();
555 <            new Thread(r).start();
555 >            new Thread(tg, r).start();
556          }
557      }
558  
559 <    static final class ExceptionToInteger implements Function<Throwable, Integer> {
560 <        public Integer apply(Throwable x) { return Integer.valueOf(3); }
442 <    }
443 <
444 <    static final class IntegerHandler implements BiFunction<Integer, Throwable, Integer> {
445 <        boolean ran;
446 <        public Integer apply(Integer x, Throwable t) {
447 <            ran = true;
448 <            return (t == null) ? two : three;
449 <        }
450 <    }
559 >    static final boolean defaultExecutorIsCommonPool
560 >        = ForkJoinPool.getCommonPoolParallelism() > 1;
561  
562      /**
563       * Permits the testing of parallel code for the 3 different
564 <     * execution modes without repeating all the testing code.
564 >     * execution modes without copy/pasting all the test methods.
565       */
566      enum ExecutionMode {
567 <        DEFAULT {
567 >        SYNC {
568 >            public void checkExecutionMode() {
569 >                assertFalse(ThreadExecutor.startedCurrentThread());
570 >                assertNull(ForkJoinTask.getPool());
571 >            }
572 >            public CompletableFuture<Void> runAsync(Runnable a) {
573 >                throw new UnsupportedOperationException();
574 >            }
575 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
576 >                throw new UnsupportedOperationException();
577 >            }
578 >            public <T> CompletableFuture<Void> thenRun
579 >                (CompletableFuture<T> f, Runnable a) {
580 >                return f.thenRun(a);
581 >            }
582 >            public <T> CompletableFuture<Void> thenAccept
583 >                (CompletableFuture<T> f, Consumer<? super T> a) {
584 >                return f.thenAccept(a);
585 >            }
586 >            public <T,U> CompletableFuture<U> thenApply
587 >                (CompletableFuture<T> f, Function<? super T,U> a) {
588 >                return f.thenApply(a);
589 >            }
590 >            public <T,U> CompletableFuture<U> thenCompose
591 >                (CompletableFuture<T> f,
592 >                 Function<? super T,? extends CompletionStage<U>> a) {
593 >                return f.thenCompose(a);
594 >            }
595 >            public <T,U> CompletableFuture<U> handle
596 >                (CompletableFuture<T> f,
597 >                 BiFunction<? super T,Throwable,? extends U> a) {
598 >                return f.handle(a);
599 >            }
600 >            public <T> CompletableFuture<T> whenComplete
601 >                (CompletableFuture<T> f,
602 >                 BiConsumer<? super T,? super Throwable> a) {
603 >                return f.whenComplete(a);
604 >            }
605              public <T,U> CompletableFuture<Void> runAfterBoth
606                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
607                  return f.runAfterBoth(g, a);
# Line 471 | Line 618 | public class CompletableFutureTest exten
618                   BiFunction<? super T,? super U,? extends V> a) {
619                  return f.thenCombine(g, a);
620              }
621 <            public <T,U> CompletableFuture<U> applyToEither
621 >            public <T> CompletableFuture<Void> runAfterEither
622                  (CompletableFuture<T> f,
623 <                 CompletionStage<? extends T> g,
624 <                 Function<? super T,U> a) {
625 <                return f.applyToEither(g, a);
623 >                 CompletionStage<?> g,
624 >                 java.lang.Runnable a) {
625 >                return f.runAfterEither(g, a);
626              }
627              public <T> CompletableFuture<Void> acceptEither
628                  (CompletableFuture<T> f,
# Line 483 | Line 630 | public class CompletableFutureTest exten
630                   Consumer<? super T> a) {
631                  return f.acceptEither(g, a);
632              }
633 <            public <T> CompletableFuture<Void> runAfterEither
633 >            public <T,U> CompletableFuture<U> applyToEither
634                  (CompletableFuture<T> f,
635 <                 CompletionStage<?> g,
636 <                 java.lang.Runnable a) {
637 <                return f.runAfterEither(g, a);
635 >                 CompletionStage<? extends T> g,
636 >                 Function<? super T,U> a) {
637 >                return f.applyToEither(g, a);
638 >            }
639 >        },
640 >
641 >        ASYNC {
642 >            public void checkExecutionMode() {
643 >                assertEquals(defaultExecutorIsCommonPool,
644 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
645 >            }
646 >            public CompletableFuture<Void> runAsync(Runnable a) {
647 >                return CompletableFuture.runAsync(a);
648 >            }
649 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
650 >                return CompletableFuture.supplyAsync(a);
651 >            }
652 >            public <T> CompletableFuture<Void> thenRun
653 >                (CompletableFuture<T> f, Runnable a) {
654 >                return f.thenRunAsync(a);
655 >            }
656 >            public <T> CompletableFuture<Void> thenAccept
657 >                (CompletableFuture<T> f, Consumer<? super T> a) {
658 >                return f.thenAcceptAsync(a);
659 >            }
660 >            public <T,U> CompletableFuture<U> thenApply
661 >                (CompletableFuture<T> f, Function<? super T,U> a) {
662 >                return f.thenApplyAsync(a);
663              }
664              public <T,U> CompletableFuture<U> thenCompose
665                  (CompletableFuture<T> f,
666                   Function<? super T,? extends CompletionStage<U>> a) {
667 <                return f.thenCompose(a);
667 >                return f.thenComposeAsync(a);
668 >            }
669 >            public <T,U> CompletableFuture<U> handle
670 >                (CompletableFuture<T> f,
671 >                 BiFunction<? super T,Throwable,? extends U> a) {
672 >                return f.handleAsync(a);
673              }
674              public <T> CompletableFuture<T> whenComplete
675                  (CompletableFuture<T> f,
676                   BiConsumer<? super T,? super Throwable> a) {
677 <                return f.whenComplete(a);
677 >                return f.whenCompleteAsync(a);
678              }
502        },
503
504 //             /** Experimental way to do more testing */
505 //         REVERSE_DEFAULT {
506 //             public <T,U> CompletableFuture<Void> runAfterBoth
507 //                 (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
508 //                 return g.runAfterBoth(f, a);
509 //             }
510 //             public <T,U> CompletableFuture<Void> thenAcceptBoth
511 //                 (CompletableFuture<T> f,
512 //                  CompletionStage<? extends U> g,
513 //                  BiConsumer<? super T,? super U> a) {
514 //                 return DEFAULT.thenAcceptBoth(f, g, a);
515 //             }
516 //         },
517
518        DEFAULT_ASYNC {
679              public <T,U> CompletableFuture<Void> runAfterBoth
680                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
681                  return f.runAfterBothAsync(g, a);
# Line 532 | Line 692 | public class CompletableFutureTest exten
692                   BiFunction<? super T,? super U,? extends V> a) {
693                  return f.thenCombineAsync(g, a);
694              }
695 <            public <T,U> CompletableFuture<U> applyToEither
695 >            public <T> CompletableFuture<Void> runAfterEither
696                  (CompletableFuture<T> f,
697 <                 CompletionStage<? extends T> g,
698 <                 Function<? super T,U> a) {
699 <                return f.applyToEitherAsync(g, a);
697 >                 CompletionStage<?> g,
698 >                 java.lang.Runnable a) {
699 >                return f.runAfterEitherAsync(g, a);
700              }
701              public <T> CompletableFuture<Void> acceptEither
702                  (CompletableFuture<T> f,
# Line 544 | Line 704 | public class CompletableFutureTest exten
704                   Consumer<? super T> a) {
705                  return f.acceptEitherAsync(g, a);
706              }
707 <            public <T> CompletableFuture<Void> runAfterEither
707 >            public <T,U> CompletableFuture<U> applyToEither
708                  (CompletableFuture<T> f,
709 <                 CompletionStage<?> g,
710 <                 java.lang.Runnable a) {
711 <                return f.runAfterEitherAsync(g, a);
709 >                 CompletionStage<? extends T> g,
710 >                 Function<? super T,U> a) {
711 >                return f.applyToEitherAsync(g, a);
712 >            }
713 >        },
714 >
715 >        EXECUTOR {
716 >            public void checkExecutionMode() {
717 >                assertTrue(ThreadExecutor.startedCurrentThread());
718 >            }
719 >            public CompletableFuture<Void> runAsync(Runnable a) {
720 >                return CompletableFuture.runAsync(a, new ThreadExecutor());
721 >            }
722 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
723 >                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
724 >            }
725 >            public <T> CompletableFuture<Void> thenRun
726 >                (CompletableFuture<T> f, Runnable a) {
727 >                return f.thenRunAsync(a, new ThreadExecutor());
728 >            }
729 >            public <T> CompletableFuture<Void> thenAccept
730 >                (CompletableFuture<T> f, Consumer<? super T> a) {
731 >                return f.thenAcceptAsync(a, new ThreadExecutor());
732 >            }
733 >            public <T,U> CompletableFuture<U> thenApply
734 >                (CompletableFuture<T> f, Function<? super T,U> a) {
735 >                return f.thenApplyAsync(a, new ThreadExecutor());
736              }
737              public <T,U> CompletableFuture<U> thenCompose
738                  (CompletableFuture<T> f,
739                   Function<? super T,? extends CompletionStage<U>> a) {
740 <                return f.thenComposeAsync(a);
740 >                return f.thenComposeAsync(a, new ThreadExecutor());
741 >            }
742 >            public <T,U> CompletableFuture<U> handle
743 >                (CompletableFuture<T> f,
744 >                 BiFunction<? super T,Throwable,? extends U> a) {
745 >                return f.handleAsync(a, new ThreadExecutor());
746              }
747              public <T> CompletableFuture<T> whenComplete
748                  (CompletableFuture<T> f,
749                   BiConsumer<? super T,? super Throwable> a) {
750 <                return f.whenCompleteAsync(a);
750 >                return f.whenCompleteAsync(a, new ThreadExecutor());
751              }
563        },
564
565 //         REVERSE_DEFAULT_ASYNC {
566 //             public <T,U> CompletableFuture<Void> runAfterBoth
567 //                 (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
568 //                 return f.runAfterBothAsync(g, a);
569 //             }
570 //             public <T,U> CompletableFuture<Void> thenAcceptBoth
571 //                 (CompletableFuture<T> f,
572 //                  CompletionStage<? extends U> g,
573 //                  BiConsumer<? super T,? super U> a) {
574 //                 return DEFAULT_ASYNC.thenAcceptBoth(f, g, a);
575 //             }
576 //         },
577
578        EXECUTOR {
752              public <T,U> CompletableFuture<Void> runAfterBoth
753                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
754                  return f.runAfterBothAsync(g, a, new ThreadExecutor());
# Line 592 | Line 765 | public class CompletableFutureTest exten
765                   BiFunction<? super T,? super U,? extends V> a) {
766                  return f.thenCombineAsync(g, a, new ThreadExecutor());
767              }
595            public <T,U> CompletableFuture<U> applyToEither
596                (CompletableFuture<T> f,
597                 CompletionStage<? extends T> g,
598                 Function<? super T,U> a) {
599                return f.applyToEitherAsync(g, a, new ThreadExecutor());
600            }
601            public <T> CompletableFuture<Void> acceptEither
602                (CompletableFuture<T> f,
603                 CompletionStage<? extends T> g,
604                 Consumer<? super T> a) {
605                return f.acceptEitherAsync(g, a, new ThreadExecutor());
606            }
768              public <T> CompletableFuture<Void> runAfterEither
769                  (CompletableFuture<T> f,
770                   CompletionStage<?> g,
771                   java.lang.Runnable a) {
772                  return f.runAfterEitherAsync(g, a, new ThreadExecutor());
773              }
774 <            public <T,U> CompletableFuture<U> thenCompose
774 >            public <T> CompletableFuture<Void> acceptEither
775                  (CompletableFuture<T> f,
776 <                 Function<? super T,? extends CompletionStage<U>> a) {
777 <                return f.thenComposeAsync(a, new ThreadExecutor());
776 >                 CompletionStage<? extends T> g,
777 >                 Consumer<? super T> a) {
778 >                return f.acceptEitherAsync(g, a, new ThreadExecutor());
779              }
780 <            public <T> CompletableFuture<T> whenComplete
780 >            public <T,U> CompletableFuture<U> applyToEither
781                  (CompletableFuture<T> f,
782 <                 BiConsumer<? super T,? super Throwable> a) {
783 <                return f.whenCompleteAsync(a, new ThreadExecutor());
782 >                 CompletionStage<? extends T> g,
783 >                 Function<? super T,U> a) {
784 >                return f.applyToEitherAsync(g, a, new ThreadExecutor());
785              }
786          };
787  
788 +        public abstract void checkExecutionMode();
789 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
790 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
791 +        public abstract <T> CompletableFuture<Void> thenRun
792 +            (CompletableFuture<T> f, Runnable a);
793 +        public abstract <T> CompletableFuture<Void> thenAccept
794 +            (CompletableFuture<T> f, Consumer<? super T> a);
795 +        public abstract <T,U> CompletableFuture<U> thenApply
796 +            (CompletableFuture<T> f, Function<? super T,U> a);
797 +        public abstract <T,U> CompletableFuture<U> thenCompose
798 +            (CompletableFuture<T> f,
799 +             Function<? super T,? extends CompletionStage<U>> a);
800 +        public abstract <T,U> CompletableFuture<U> handle
801 +            (CompletableFuture<T> f,
802 +             BiFunction<? super T,Throwable,? extends U> a);
803 +        public abstract <T> CompletableFuture<T> whenComplete
804 +            (CompletableFuture<T> f,
805 +             BiConsumer<? super T,? super Throwable> a);
806          public abstract <T,U> CompletableFuture<Void> runAfterBoth
807              (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
808          public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
# Line 632 | Line 813 | public class CompletableFutureTest exten
813              (CompletableFuture<T> f,
814               CompletionStage<? extends U> g,
815               BiFunction<? super T,? super U,? extends V> a);
635        public abstract <T,U> CompletableFuture<U> applyToEither
636            (CompletableFuture<T> f,
637             CompletionStage<? extends T> g,
638             Function<? super T,U> a);
639        public abstract <T> CompletableFuture<Void> acceptEither
640            (CompletableFuture<T> f,
641             CompletionStage<? extends T> g,
642             Consumer<? super T> a);
816          public abstract <T> CompletableFuture<Void> runAfterEither
817              (CompletableFuture<T> f,
818               CompletionStage<?> g,
819               java.lang.Runnable a);
820 <        public abstract <T,U> CompletableFuture<U> thenCompose
820 >        public abstract <T> CompletableFuture<Void> acceptEither
821              (CompletableFuture<T> f,
822 <             Function<? super T,? extends CompletionStage<U>> a);
823 <        public abstract <T> CompletableFuture<T> whenComplete
822 >             CompletionStage<? extends T> g,
823 >             Consumer<? super T> a);
824 >        public abstract <T,U> CompletableFuture<U> applyToEither
825              (CompletableFuture<T> f,
826 <             BiConsumer<? super T,? super Throwable> a);
827 <
654 <
655 <    }
656 <
657 <    /**
658 <     * exceptionally action completes with function value on source
659 <     * exception; otherwise with source value
660 <     */
661 <    public void testExceptionally() {
662 <        CompletableFuture<Integer> f = new CompletableFuture<>();
663 <        ExceptionToInteger r = new ExceptionToInteger();
664 <        CompletableFuture<Integer> g = f.exceptionally(r);
665 <        f.completeExceptionally(new CFException());
666 <        checkCompletedNormally(g, three);
667 <
668 <        f = new CompletableFuture<>();
669 <        r = new ExceptionToInteger();
670 <        g = f.exceptionally(r);
671 <        f.complete(one);
672 <        checkCompletedNormally(g, one);
673 <    }
674 <
675 <    /**
676 <     * handle action completes normally with function value on either
677 <     * normal or exceptional completion of source
678 <     */
679 <    public void testHandle() {
680 <        CompletableFuture<Integer> f, g;
681 <        IntegerHandler r;
682 <
683 <        f = new CompletableFuture<>();
684 <        f.completeExceptionally(new CFException());
685 <        g = f.handle(r = new IntegerHandler());
686 <        assertTrue(r.ran);
687 <        checkCompletedNormally(g, three);
688 <
689 <        f = new CompletableFuture<>();
690 <        g = f.handle(r = new IntegerHandler());
691 <        assertFalse(r.ran);
692 <        f.completeExceptionally(new CFException());
693 <        checkCompletedNormally(g, three);
694 <        assertTrue(r.ran);
695 <
696 <        f = new CompletableFuture<>();
697 <        f.complete(one);
698 <        g = f.handle(r = new IntegerHandler());
699 <        assertTrue(r.ran);
700 <        checkCompletedNormally(g, two);
701 <
702 <        f = new CompletableFuture<>();
703 <        g = f.handle(r = new IntegerHandler());
704 <        assertFalse(r.ran);
705 <        f.complete(one);
706 <        assertTrue(r.ran);
707 <        checkCompletedNormally(g, two);
708 <    }
709 <
710 <    /**
711 <     * runAsync completes after running Runnable
712 <     */
713 <    public void testRunAsync() {
714 <        Noop r = new Noop();
715 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
716 <        assertNull(f.join());
717 <        assertTrue(r.ran);
718 <        checkCompletedNormally(f, null);
719 <    }
720 <
721 <    /**
722 <     * runAsync with executor completes after running Runnable
723 <     */
724 <    public void testRunAsync2() {
725 <        Noop r = new Noop();
726 <        ThreadExecutor exec = new ThreadExecutor();
727 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, exec);
728 <        assertNull(f.join());
729 <        assertTrue(r.ran);
730 <        checkCompletedNormally(f, null);
731 <        assertEquals(1, exec.count.get());
732 <    }
733 <
734 <    /**
735 <     * failing runAsync completes exceptionally after running Runnable
736 <     */
737 <    public void testRunAsync3() {
738 <        FailingNoop r = new FailingNoop();
739 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
740 <        checkCompletedWithWrappedCFException(f);
741 <        assertTrue(r.ran);
826 >             CompletionStage<? extends T> g,
827 >             Function<? super T,U> a);
828      }
829  
830      /**
831 <     * supplyAsync completes with result of supplier
831 >     * exceptionally action is not invoked when source completes
832 >     * normally, and source result is propagated
833       */
834 <    public void testSupplyAsync() {
835 <        CompletableFuture<Integer> f;
836 <        f = CompletableFuture.supplyAsync(supplyOne);
837 <        assertEquals(f.join(), one);
838 <        checkCompletedNormally(f, one);
839 <    }
834 >    public void testExceptionally_normalCompletion() {
835 >        for (boolean createIncomplete : new boolean[] { true, false })
836 >        for (Integer v1 : new Integer[] { 1, null })
837 >    {
838 >        final AtomicInteger a = new AtomicInteger(0);
839 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
840 >        if (!createIncomplete) assertTrue(f.complete(v1));
841 >        final CompletableFuture<Integer> g = f.exceptionally
842 >            ((Throwable t) -> {
843 >                a.getAndIncrement();
844 >                threadFail("should not be called");
845 >                return null;            // unreached
846 >            });
847 >        if (createIncomplete) assertTrue(f.complete(v1));
848  
849 <    /**
850 <     * supplyAsync with executor completes with result of supplier
851 <     */
852 <    public void testSupplyAsync2() {
758 <        CompletableFuture<Integer> f;
759 <        f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
760 <        assertEquals(f.join(), one);
761 <        checkCompletedNormally(f, one);
762 <    }
849 >        checkCompletedNormally(g, v1);
850 >        checkCompletedNormally(f, v1);
851 >        assertEquals(0, a.get());
852 >    }}
853  
854      /**
855 <     * Failing supplyAsync completes exceptionally
855 >     * exceptionally action completes with function value on source
856 >     * exception
857       */
858 <    public void testSupplyAsync3() {
859 <        FailingSupplier r = new FailingSupplier();
860 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
861 <        checkCompletedWithWrappedCFException(f);
862 <        assertTrue(r.ran);
863 <    }
864 <
865 <    // seq completion methods
858 >    public void testExceptionally_exceptionalCompletion() {
859 >        for (boolean createIncomplete : new boolean[] { true, false })
860 >        for (Integer v1 : new Integer[] { 1, null })
861 >    {
862 >        final AtomicInteger a = new AtomicInteger(0);
863 >        final CFException ex = new CFException();
864 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
865 >        if (!createIncomplete) f.completeExceptionally(ex);
866 >        final CompletableFuture<Integer> g = f.exceptionally
867 >            ((Throwable t) -> {
868 >                ExecutionMode.SYNC.checkExecutionMode();
869 >                threadAssertSame(t, ex);
870 >                a.getAndIncrement();
871 >                return v1;
872 >            });
873 >        if (createIncomplete) f.completeExceptionally(ex);
874  
875 <    /**
876 <     * thenRun result completes normally after normal completion of source
877 <     */
779 <    public void testThenRun() {
780 <        CompletableFuture<Integer> f;
781 <        CompletableFuture<Void> g;
782 <        Noop r;
875 >        checkCompletedNormally(g, v1);
876 >        assertEquals(1, a.get());
877 >    }}
878  
879 <        f = new CompletableFuture<>();
880 <        g = f.thenRun(r = new Noop());
881 <        f.complete(null);
882 <        checkCompletedNormally(g, null);
883 <        assertTrue(r.ran);
879 >    public void testExceptionally_exceptionalCompletionActionFailed() {
880 >        for (boolean createIncomplete : new boolean[] { true, false })
881 >    {
882 >        final AtomicInteger a = new AtomicInteger(0);
883 >        final CFException ex1 = new CFException();
884 >        final CFException ex2 = new CFException();
885 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
886 >        if (!createIncomplete) f.completeExceptionally(ex1);
887 >        final CompletableFuture<Integer> g = f.exceptionally
888 >            ((Throwable t) -> {
889 >                ExecutionMode.SYNC.checkExecutionMode();
890 >                threadAssertSame(t, ex1);
891 >                a.getAndIncrement();
892 >                throw ex2;
893 >            });
894 >        if (createIncomplete) f.completeExceptionally(ex1);
895  
896 <        f = new CompletableFuture<>();
897 <        f.complete(null);
898 <        g = f.thenRun(r = new Noop());
793 <        checkCompletedNormally(g, null);
794 <        assertTrue(r.ran);
795 <    }
896 >        checkCompletedWithWrappedException(g, ex2);
897 >        assertEquals(1, a.get());
898 >    }}
899  
900      /**
901 <     * thenRun result completes exceptionally after exceptional
902 <     * completion of source
901 >     * whenComplete action executes on normal completion, propagating
902 >     * source result.
903       */
904 <    public void testThenRun2() {
905 <        CompletableFuture<Integer> f;
906 <        CompletableFuture<Void> g;
907 <        Noop r;
908 <
909 <        f = new CompletableFuture<>();
910 <        g = f.thenRun(r = new Noop());
911 <        f.completeExceptionally(new CFException());
912 <        checkCompletedWithWrappedCFException(g);
913 <        assertFalse(r.ran);
904 >    public void testWhenComplete_normalCompletion() {
905 >        for (ExecutionMode m : ExecutionMode.values())
906 >        for (boolean createIncomplete : new boolean[] { true, false })
907 >        for (Integer v1 : new Integer[] { 1, null })
908 >    {
909 >        final AtomicInteger a = new AtomicInteger(0);
910 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
911 >        if (!createIncomplete) assertTrue(f.complete(v1));
912 >        final CompletableFuture<Integer> g = m.whenComplete
913 >            (f,
914 >             (Integer x, Throwable t) -> {
915 >                m.checkExecutionMode();
916 >                threadAssertSame(x, v1);
917 >                threadAssertNull(t);
918 >                a.getAndIncrement();
919 >            });
920 >        if (createIncomplete) assertTrue(f.complete(v1));
921  
922 <        f = new CompletableFuture<>();
923 <        f.completeExceptionally(new CFException());
924 <        g = f.thenRun(r = new Noop());
925 <        checkCompletedWithWrappedCFException(g);
816 <        assertFalse(r.ran);
817 <    }
922 >        checkCompletedNormally(g, v1);
923 >        checkCompletedNormally(f, v1);
924 >        assertEquals(1, a.get());
925 >    }}
926  
927      /**
928 <     * thenRun result completes exceptionally if action does
928 >     * whenComplete action executes on exceptional completion, propagating
929 >     * source result.
930       */
931 <    public void testThenRun3() {
932 <        CompletableFuture<Integer> f;
933 <        CompletableFuture<Void> g;
934 <        FailingNoop r;
935 <
936 <        f = new CompletableFuture<>();
937 <        g = f.thenRun(r = new FailingNoop());
938 <        f.complete(null);
939 <        checkCompletedWithWrappedCFException(g);
931 >    public void testWhenComplete_exceptionalCompletion() {
932 >        for (ExecutionMode m : ExecutionMode.values())
933 >        for (boolean createIncomplete : new boolean[] { true, false })
934 >    {
935 >        final AtomicInteger a = new AtomicInteger(0);
936 >        final CFException ex = new CFException();
937 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
938 >        if (!createIncomplete) f.completeExceptionally(ex);
939 >        final CompletableFuture<Integer> g = m.whenComplete
940 >            (f,
941 >             (Integer x, Throwable t) -> {
942 >                m.checkExecutionMode();
943 >                threadAssertNull(x);
944 >                threadAssertSame(t, ex);
945 >                a.getAndIncrement();
946 >            });
947 >        if (createIncomplete) f.completeExceptionally(ex);
948  
949 <        f = new CompletableFuture<>();
950 <        f.complete(null);
951 <        g = f.thenRun(r = new FailingNoop());
952 <        checkCompletedWithWrappedCFException(g);
836 <    }
949 >        checkCompletedWithWrappedException(g, ex);
950 >        checkCompletedExceptionally(f, ex);
951 >        assertEquals(1, a.get());
952 >    }}
953  
954      /**
955 <     * thenRun result completes exceptionally if source cancelled
955 >     * whenComplete action executes on cancelled source, propagating
956 >     * CancellationException.
957       */
958 <    public void testThenRun4() {
959 <        CompletableFuture<Integer> f;
960 <        CompletableFuture<Void> g;
961 <        Noop r;
962 <
963 <        f = new CompletableFuture<>();
964 <        g = f.thenRun(r = new Noop());
965 <        assertTrue(f.cancel(true));
966 <        checkCompletedWithWrappedCancellationException(g);
958 >    public void testWhenComplete_sourceCancelled() {
959 >        for (ExecutionMode m : ExecutionMode.values())
960 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
961 >        for (boolean createIncomplete : new boolean[] { true, false })
962 >    {
963 >        final AtomicInteger a = new AtomicInteger(0);
964 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
965 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
966 >        final CompletableFuture<Integer> g = m.whenComplete
967 >            (f,
968 >             (Integer x, Throwable t) -> {
969 >                m.checkExecutionMode();
970 >                threadAssertNull(x);
971 >                threadAssertTrue(t instanceof CancellationException);
972 >                a.getAndIncrement();
973 >            });
974 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
975  
851        f = new CompletableFuture<>();
852        assertTrue(f.cancel(true));
853        g = f.thenRun(r = new Noop());
976          checkCompletedWithWrappedCancellationException(g);
977 <    }
977 >        checkCancelled(f);
978 >        assertEquals(1, a.get());
979 >    }}
980  
981      /**
982 <     * thenApply result completes normally after normal completion of source
982 >     * If a whenComplete action throws an exception when triggered by
983 >     * a normal completion, it completes exceptionally
984       */
985 <    public void testThenApply() {
986 <        CompletableFuture<Integer> f = new CompletableFuture<>();
987 <        CompletableFuture<Integer> g = f.thenApply(inc);
988 <        f.complete(one);
989 <        checkCompletedNormally(g, two);
990 <    }
985 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
986 >        for (boolean createIncomplete : new boolean[] { true, false })
987 >        for (ExecutionMode m : ExecutionMode.values())
988 >        for (Integer v1 : new Integer[] { 1, null })
989 >    {
990 >        final AtomicInteger a = new AtomicInteger(0);
991 >        final CFException ex = new CFException();
992 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
993 >        if (!createIncomplete) assertTrue(f.complete(v1));
994 >        final CompletableFuture<Integer> g = m.whenComplete
995 >            (f,
996 >             (Integer x, Throwable t) -> {
997 >                m.checkExecutionMode();
998 >                threadAssertSame(x, v1);
999 >                threadAssertNull(t);
1000 >                a.getAndIncrement();
1001 >                throw ex;
1002 >            });
1003 >        if (createIncomplete) assertTrue(f.complete(v1));
1004  
1005 <    /**
1006 <     * thenApply result completes exceptionally after exceptional
1007 <     * completion of source
1008 <     */
871 <    public void testThenApply2() {
872 <        CompletableFuture<Integer> f = new CompletableFuture<>();
873 <        CompletableFuture<Integer> g = f.thenApply(inc);
874 <        f.completeExceptionally(new CFException());
875 <        checkCompletedWithWrappedCFException(g);
876 <    }
1005 >        checkCompletedWithWrappedException(g, ex);
1006 >        checkCompletedNormally(f, v1);
1007 >        assertEquals(1, a.get());
1008 >    }}
1009  
1010      /**
1011 <     * thenApply result completes exceptionally if action does
1011 >     * If a whenComplete action throws an exception when triggered by
1012 >     * a source completion that also throws an exception, the source
1013 >     * exception takes precedence (unlike handle)
1014       */
1015 <    public void testThenApply3() {
1016 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1017 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1018 <        f.complete(one);
1019 <        checkCompletedWithWrappedCFException(g);
1020 <    }
1015 >    public void testWhenComplete_sourceFailedActionFailed() {
1016 >        for (boolean createIncomplete : new boolean[] { true, false })
1017 >        for (ExecutionMode m : ExecutionMode.values())
1018 >    {
1019 >        final AtomicInteger a = new AtomicInteger(0);
1020 >        final CFException ex1 = new CFException();
1021 >        final CFException ex2 = new CFException();
1022 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1023  
1024 <    /**
1025 <     * thenApply result completes exceptionally if source cancelled
1026 <     */
1027 <    public void testThenApply4() {
1028 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1029 <        CompletableFuture<Integer> g = f.thenApply(inc);
1030 <        assertTrue(f.cancel(true));
1031 <        checkCompletedWithWrappedCancellationException(g);
1032 <    }
1024 >        if (!createIncomplete) f.completeExceptionally(ex1);
1025 >        final CompletableFuture<Integer> g = m.whenComplete
1026 >            (f,
1027 >             (Integer x, Throwable t) -> {
1028 >                m.checkExecutionMode();
1029 >                threadAssertSame(t, ex1);
1030 >                threadAssertNull(x);
1031 >                a.getAndIncrement();
1032 >                throw ex2;
1033 >            });
1034 >        if (createIncomplete) f.completeExceptionally(ex1);
1035  
1036 <    /**
1037 <     * thenAccept result completes normally after normal completion of source
1038 <     */
1039 <    public void testThenAccept() {
902 <        CompletableFuture<Integer> f = new CompletableFuture<>();
903 <        IncAction r = new IncAction();
904 <        CompletableFuture<Void> g = f.thenAccept(r);
905 <        f.complete(one);
906 <        checkCompletedNormally(g, null);
907 <        assertEquals(r.value, (Integer) 2);
908 <    }
1036 >        checkCompletedWithWrappedException(g, ex1);
1037 >        checkCompletedExceptionally(f, ex1);
1038 >        assertEquals(1, a.get());
1039 >    }}
1040  
1041      /**
1042 <     * thenAccept result completes exceptionally after exceptional
1042 >     * handle action completes normally with function value on normal
1043       * completion of source
1044       */
1045 <    public void testThenAccept2() {
915 <        CompletableFuture<Integer> f = new CompletableFuture<>();
916 <        IncAction r = new IncAction();
917 <        CompletableFuture<Void> g = f.thenAccept(r);
918 <        f.completeExceptionally(new CFException());
919 <        checkCompletedWithWrappedCFException(g);
920 <    }
921 <
922 <    /**
923 <     * thenAccept result completes exceptionally if action does
924 <     */
925 <    public void testThenAccept3() {
926 <        CompletableFuture<Integer> f = new CompletableFuture<>();
927 <        FailingConsumer r = new FailingConsumer();
928 <        CompletableFuture<Void> g = f.thenAccept(r);
929 <        f.complete(one);
930 <        checkCompletedWithWrappedCFException(g);
931 <        assertTrue(r.ran);
932 <    }
933 <
934 <    /**
935 <     * thenAccept result completes exceptionally if source cancelled
936 <     */
937 <    public void testThenAccept4() {
938 <        CompletableFuture<Integer> f = new CompletableFuture<>();
939 <        IncAction r = new IncAction();
940 <        CompletableFuture<Void> g = f.thenAccept(r);
941 <        assertTrue(f.cancel(true));
942 <        checkCompletedWithWrappedCancellationException(g);
943 <    }
944 <
945 <    /**
946 <     * thenCombine result completes normally after normal completion
947 <     * of sources
948 <     */
949 <    public void testThenCombine_normalCompletion1() {
950 <        for (boolean createdIncomplete : new boolean[] { true, false })
951 <        for (boolean fFirst : new boolean[] { true, false })
1045 >    public void testHandle_normalCompletion() {
1046          for (ExecutionMode m : ExecutionMode.values())
1047 +        for (boolean createIncomplete : new boolean[] { true, false })
1048          for (Integer v1 : new Integer[] { 1, null })
1049 <        for (Integer v2 : new Integer[] { 2, null }) {
955 <
1049 >    {
1050          final CompletableFuture<Integer> f = new CompletableFuture<>();
1051 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1052 <        final SubtractFunction r = new SubtractFunction();
1053 <        CompletableFuture<Integer> h = null;
1054 <        if (createdIncomplete) h = m.thenCombine(f, g, r);
1055 <
1056 <        if (fFirst)
1057 <            f.complete(v1);
1058 <        else
1059 <            g.complete(v2);
1060 <        if (createdIncomplete) checkIncomplete(h);
1061 <        assertEquals(r.invocationCount, 0);
1062 <        if (!fFirst)
969 <            f.complete(v1);
970 <        else
971 <            g.complete(v2);
972 <        if (!createdIncomplete) h = m.thenCombine(f, g, r);
1051 >        final AtomicInteger a = new AtomicInteger(0);
1052 >        if (!createIncomplete) assertTrue(f.complete(v1));
1053 >        final CompletableFuture<Integer> g = m.handle
1054 >            (f,
1055 >             (Integer x, Throwable t) -> {
1056 >                m.checkExecutionMode();
1057 >                threadAssertSame(x, v1);
1058 >                threadAssertNull(t);
1059 >                a.getAndIncrement();
1060 >                return inc(v1);
1061 >            });
1062 >        if (createIncomplete) assertTrue(f.complete(v1));
1063  
1064 <        checkCompletedNormally(h, subtract(v1, v2));
1064 >        checkCompletedNormally(g, inc(v1));
1065          checkCompletedNormally(f, v1);
1066 <        checkCompletedNormally(g, v2);
1067 <        assertEquals(r.invocationCount, 1);
978 <        }
979 <    }
1066 >        assertEquals(1, a.get());
1067 >    }}
1068  
1069      /**
1070 <     * thenCombine result completes exceptionally after exceptional
1071 <     * completion of either source
1070 >     * handle action completes normally with function value on
1071 >     * exceptional completion of source
1072       */
1073 <    public void testThenCombine_exceptionalCompletion1() {
1073 >    public void testHandle_exceptionalCompletion() {
1074          for (ExecutionMode m : ExecutionMode.values())
1075 <        for (Integer v1 : new Integer[] { 1, null }) {
1076 <
1075 >        for (boolean createIncomplete : new boolean[] { true, false })
1076 >        for (Integer v1 : new Integer[] { 1, null })
1077 >    {
1078          final CompletableFuture<Integer> f = new CompletableFuture<>();
1079 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
991 <        final SubtractFunction r = new SubtractFunction();
992 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1079 >        final AtomicInteger a = new AtomicInteger(0);
1080          final CFException ex = new CFException();
1081 +        if (!createIncomplete) f.completeExceptionally(ex);
1082 +        final CompletableFuture<Integer> g = m.handle
1083 +            (f,
1084 +             (Integer x, Throwable t) -> {
1085 +                m.checkExecutionMode();
1086 +                threadAssertNull(x);
1087 +                threadAssertSame(t, ex);
1088 +                a.getAndIncrement();
1089 +                return v1;
1090 +            });
1091 +        if (createIncomplete) f.completeExceptionally(ex);
1092  
995        f.completeExceptionally(ex);
996        checkIncomplete(h);
997        g.complete(v1);
998
999        checkCompletedWithWrappedCFException(h, ex);
1000        checkCompletedWithWrappedCFException(f, ex);
1001        assertEquals(r.invocationCount, 0);
1093          checkCompletedNormally(g, v1);
1094 <        }
1095 <    }
1094 >        checkCompletedExceptionally(f, ex);
1095 >        assertEquals(1, a.get());
1096 >    }}
1097  
1098 <    public void testThenCombine_exceptionalCompletion2() {
1098 >    /**
1099 >     * handle action completes normally with function value on
1100 >     * cancelled source
1101 >     */
1102 >    public void testHandle_sourceCancelled() {
1103          for (ExecutionMode m : ExecutionMode.values())
1104 <        for (Integer v1 : new Integer[] { 1, null }) {
1105 <
1104 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1105 >        for (boolean createIncomplete : new boolean[] { true, false })
1106 >        for (Integer v1 : new Integer[] { 1, null })
1107 >    {
1108          final CompletableFuture<Integer> f = new CompletableFuture<>();
1109 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1110 <        final SubtractFunction r = new SubtractFunction();
1111 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1112 <        final CFException ex = new CFException();
1113 <
1114 <        g.completeExceptionally(ex);
1115 <        checkIncomplete(h);
1116 <        f.complete(v1);
1109 >        final AtomicInteger a = new AtomicInteger(0);
1110 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1111 >        final CompletableFuture<Integer> g = m.handle
1112 >            (f,
1113 >             (Integer x, Throwable t) -> {
1114 >                m.checkExecutionMode();
1115 >                threadAssertNull(x);
1116 >                threadAssertTrue(t instanceof CancellationException);
1117 >                a.getAndIncrement();
1118 >                return v1;
1119 >            });
1120 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1121  
1122 <        checkCompletedWithWrappedCFException(h, ex);
1123 <        checkCompletedWithWrappedCFException(g, ex);
1124 <        assertEquals(r.invocationCount, 0);
1125 <        checkCompletedNormally(f, v1);
1024 <        }
1025 <    }
1122 >        checkCompletedNormally(g, v1);
1123 >        checkCancelled(f);
1124 >        assertEquals(1, a.get());
1125 >    }}
1126  
1127 <    public void testThenCombine_exceptionalCompletion3() {
1127 >    /**
1128 >     * If a "handle action" throws an exception when triggered by
1129 >     * a normal completion, it completes exceptionally
1130 >     */
1131 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1132          for (ExecutionMode m : ExecutionMode.values())
1133 <        for (Integer v1 : new Integer[] { 1, null }) {
1134 <
1133 >        for (boolean createIncomplete : new boolean[] { true, false })
1134 >        for (Integer v1 : new Integer[] { 1, null })
1135 >    {
1136          final CompletableFuture<Integer> f = new CompletableFuture<>();
1137 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1033 <        final SubtractFunction r = new SubtractFunction();
1137 >        final AtomicInteger a = new AtomicInteger(0);
1138          final CFException ex = new CFException();
1139 +        if (!createIncomplete) assertTrue(f.complete(v1));
1140 +        final CompletableFuture<Integer> g = m.handle
1141 +            (f,
1142 +             (Integer x, Throwable t) -> {
1143 +                m.checkExecutionMode();
1144 +                threadAssertSame(x, v1);
1145 +                threadAssertNull(t);
1146 +                a.getAndIncrement();
1147 +                throw ex;
1148 +            });
1149 +        if (createIncomplete) assertTrue(f.complete(v1));
1150  
1151 <        g.completeExceptionally(ex);
1037 <        f.complete(v1);
1038 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1039 <
1040 <        checkCompletedWithWrappedCFException(h, ex);
1041 <        checkCompletedWithWrappedCFException(g, ex);
1042 <        assertEquals(r.invocationCount, 0);
1151 >        checkCompletedWithWrappedException(g, ex);
1152          checkCompletedNormally(f, v1);
1153 <        }
1154 <    }
1153 >        assertEquals(1, a.get());
1154 >    }}
1155  
1156 <    public void testThenCombine_exceptionalCompletion4() {
1156 >    /**
1157 >     * If a "handle action" throws an exception when triggered by
1158 >     * a source completion that also throws an exception, the action
1159 >     * exception takes precedence (unlike whenComplete)
1160 >     */
1161 >    public void testHandle_sourceFailedActionFailed() {
1162 >        for (boolean createIncomplete : new boolean[] { true, false })
1163          for (ExecutionMode m : ExecutionMode.values())
1164 <        for (Integer v1 : new Integer[] { 1, null }) {
1165 <
1164 >    {
1165 >        final AtomicInteger a = new AtomicInteger(0);
1166 >        final CFException ex1 = new CFException();
1167 >        final CFException ex2 = new CFException();
1168          final CompletableFuture<Integer> f = new CompletableFuture<>();
1052        final CompletableFuture<Integer> g = new CompletableFuture<>();
1053        final SubtractFunction r = new SubtractFunction();
1054        final CFException ex = new CFException();
1169  
1170 <        f.completeExceptionally(ex);
1171 <        g.complete(v1);
1172 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1170 >        if (!createIncomplete) f.completeExceptionally(ex1);
1171 >        final CompletableFuture<Integer> g = m.handle
1172 >            (f,
1173 >             (Integer x, Throwable t) -> {
1174 >                m.checkExecutionMode();
1175 >                threadAssertNull(x);
1176 >                threadAssertSame(ex1, t);
1177 >                a.getAndIncrement();
1178 >                throw ex2;
1179 >            });
1180 >        if (createIncomplete) f.completeExceptionally(ex1);
1181  
1182 <        checkCompletedWithWrappedCFException(h, ex);
1183 <        checkCompletedWithWrappedCFException(f, ex);
1184 <        assertEquals(r.invocationCount, 0);
1185 <        checkCompletedNormally(g, v1);
1064 <        }
1065 <    }
1182 >        checkCompletedWithWrappedException(g, ex2);
1183 >        checkCompletedExceptionally(f, ex1);
1184 >        assertEquals(1, a.get());
1185 >    }}
1186  
1187      /**
1188 <     * thenCombine result completes exceptionally if action does
1188 >     * runAsync completes after running Runnable
1189       */
1190 <    public void testThenCombine_actionFailed1() {
1191 <        for (ExecutionMode m : ExecutionMode.values())
1192 <        for (Integer v1 : new Integer[] { 1, null })
1193 <        for (Integer v2 : new Integer[] { 2, null }) {
1194 <
1195 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1196 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1197 <        final FailingBiFunction r = new FailingBiFunction();
1198 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1199 <
1200 <        f.complete(v1);
1201 <        checkIncomplete(h);
1202 <        g.complete(v2);
1190 >    public void testRunAsync_normalCompletion() {
1191 >        ExecutionMode[] executionModes = {
1192 >            ExecutionMode.ASYNC,
1193 >            ExecutionMode.EXECUTOR,
1194 >        };
1195 >        for (ExecutionMode m : executionModes)
1196 >    {
1197 >        final Noop r = new Noop(m);
1198 >        final CompletableFuture<Void> f = m.runAsync(r);
1199 >        assertNull(f.join());
1200 >        checkCompletedNormally(f, null);
1201 >        r.assertInvoked();
1202 >    }}
1203  
1204 <        checkCompletedWithWrappedCFException(h);
1205 <        checkCompletedNormally(f, v1);
1206 <        checkCompletedNormally(g, v2);
1207 <        }
1208 <    }
1204 >    /**
1205 >     * failing runAsync completes exceptionally after running Runnable
1206 >     */
1207 >    public void testRunAsync_exceptionalCompletion() {
1208 >        ExecutionMode[] executionModes = {
1209 >            ExecutionMode.ASYNC,
1210 >            ExecutionMode.EXECUTOR,
1211 >        };
1212 >        for (ExecutionMode m : executionModes)
1213 >    {
1214 >        final FailingRunnable r = new FailingRunnable(m);
1215 >        final CompletableFuture<Void> f = m.runAsync(r);
1216 >        checkCompletedWithWrappedCFException(f);
1217 >        r.assertInvoked();
1218 >    }}
1219  
1220 <    public void testThenCombine_actionFailed2() {
1221 <        for (ExecutionMode m : ExecutionMode.values())
1220 >    /**
1221 >     * supplyAsync completes with result of supplier
1222 >     */
1223 >    public void testSupplyAsync_normalCompletion() {
1224 >        ExecutionMode[] executionModes = {
1225 >            ExecutionMode.ASYNC,
1226 >            ExecutionMode.EXECUTOR,
1227 >        };
1228 >        for (ExecutionMode m : executionModes)
1229          for (Integer v1 : new Integer[] { 1, null })
1230 <        for (Integer v2 : new Integer[] { 2, null }) {
1231 <
1232 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1233 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1097 <        final FailingBiFunction r = new FailingBiFunction();
1098 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1099 <
1100 <        g.complete(v2);
1101 <        checkIncomplete(h);
1102 <        f.complete(v1);
1103 <
1104 <        checkCompletedWithWrappedCFException(h);
1230 >    {
1231 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1232 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1233 >        assertSame(v1, f.join());
1234          checkCompletedNormally(f, v1);
1235 <        checkCompletedNormally(g, v2);
1236 <        }
1108 <    }
1235 >        r.assertInvoked();
1236 >    }}
1237  
1238      /**
1239 <     * thenCombine result completes exceptionally if either source cancelled
1239 >     * Failing supplyAsync completes exceptionally
1240       */
1241 <    public void testThenCombine_sourceCancelled1() {
1242 <        for (ExecutionMode m : ExecutionMode.values())
1243 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1244 <        for (Integer v1 : new Integer[] { 1, null }) {
1245 <
1246 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1247 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1248 <        final SubtractFunction r = new SubtractFunction();
1249 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1250 <
1251 <        assertTrue(f.cancel(mayInterruptIfRunning));
1252 <        checkIncomplete(h);
1125 <        g.complete(v1);
1241 >    public void testSupplyAsync_exceptionalCompletion() {
1242 >        ExecutionMode[] executionModes = {
1243 >            ExecutionMode.ASYNC,
1244 >            ExecutionMode.EXECUTOR,
1245 >        };
1246 >        for (ExecutionMode m : executionModes)
1247 >    {
1248 >        FailingSupplier r = new FailingSupplier(m);
1249 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1250 >        checkCompletedWithWrappedCFException(f);
1251 >        r.assertInvoked();
1252 >    }}
1253  
1254 <        checkCompletedWithWrappedCancellationException(h);
1128 <        checkCancelled(f);
1129 <        assertEquals(r.invocationCount, 0);
1130 <        checkCompletedNormally(g, v1);
1131 <        }
1132 <    }
1254 >    // seq completion methods
1255  
1256 <    public void testThenCombine_sourceCancelled2() {
1256 >    /**
1257 >     * thenRun result completes normally after normal completion of source
1258 >     */
1259 >    public void testThenRun_normalCompletion() {
1260          for (ExecutionMode m : ExecutionMode.values())
1261 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1262 <        for (Integer v1 : new Integer[] { 1, null }) {
1138 <
1261 >        for (Integer v1 : new Integer[] { 1, null })
1262 >    {
1263          final CompletableFuture<Integer> f = new CompletableFuture<>();
1264 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1265 <        final SubtractFunction r = new SubtractFunction();
1142 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1143 <
1144 <        assertTrue(g.cancel(mayInterruptIfRunning));
1145 <        checkIncomplete(h);
1146 <        f.complete(v1);
1264 >        final Noop[] rs = new Noop[6];
1265 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1266  
1267 <        checkCompletedWithWrappedCancellationException(h);
1268 <        checkCancelled(g);
1269 <        assertEquals(r.invocationCount, 0);
1267 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1268 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1269 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1270 >        checkIncomplete(h0);
1271 >        checkIncomplete(h1);
1272 >        checkIncomplete(h2);
1273 >        assertTrue(f.complete(v1));
1274 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1275 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1276 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1277 >
1278 >        checkCompletedNormally(h0, null);
1279 >        checkCompletedNormally(h1, null);
1280 >        checkCompletedNormally(h2, null);
1281 >        checkCompletedNormally(h3, null);
1282 >        checkCompletedNormally(h4, null);
1283 >        checkCompletedNormally(h5, null);
1284          checkCompletedNormally(f, v1);
1285 <        }
1286 <    }
1285 >        for (Noop r : rs) r.assertInvoked();
1286 >    }}
1287  
1288 <    public void testThenCombine_sourceCancelled3() {
1288 >    /**
1289 >     * thenRun result completes exceptionally after exceptional
1290 >     * completion of source
1291 >     */
1292 >    public void testThenRun_exceptionalCompletion() {
1293          for (ExecutionMode m : ExecutionMode.values())
1294 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1295 <        for (Integer v1 : new Integer[] { 1, null }) {
1159 <
1294 >    {
1295 >        final CFException ex = new CFException();
1296          final CompletableFuture<Integer> f = new CompletableFuture<>();
1297 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1298 <        final SubtractFunction r = new SubtractFunction();
1163 <
1164 <        assertTrue(g.cancel(mayInterruptIfRunning));
1165 <        f.complete(v1);
1166 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1297 >        final Noop[] rs = new Noop[6];
1298 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1299  
1300 <        checkCompletedWithWrappedCancellationException(h);
1301 <        checkCancelled(g);
1302 <        assertEquals(r.invocationCount, 0);
1303 <        checkCompletedNormally(f, v1);
1304 <        }
1305 <    }
1300 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1301 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1302 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1303 >        checkIncomplete(h0);
1304 >        checkIncomplete(h1);
1305 >        checkIncomplete(h2);
1306 >        assertTrue(f.completeExceptionally(ex));
1307 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1308 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1309 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1310 >
1311 >        checkCompletedWithWrappedException(h0, ex);
1312 >        checkCompletedWithWrappedException(h1, ex);
1313 >        checkCompletedWithWrappedException(h2, ex);
1314 >        checkCompletedWithWrappedException(h3, ex);
1315 >        checkCompletedWithWrappedException(h4, ex);
1316 >        checkCompletedWithWrappedException(h5, ex);
1317 >        checkCompletedExceptionally(f, ex);
1318 >        for (Noop r : rs) r.assertNotInvoked();
1319 >    }}
1320  
1321 <    public void testThenCombine_sourceCancelled4() {
1321 >    /**
1322 >     * thenRun result completes exceptionally if source cancelled
1323 >     */
1324 >    public void testThenRun_sourceCancelled() {
1325          for (ExecutionMode m : ExecutionMode.values())
1326          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1327 <        for (Integer v1 : new Integer[] { 1, null }) {
1179 <
1327 >    {
1328          final CompletableFuture<Integer> f = new CompletableFuture<>();
1329 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1330 <        final SubtractFunction r = new SubtractFunction();
1329 >        final Noop[] rs = new Noop[6];
1330 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1331  
1332 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1333 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1334 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1335 +        checkIncomplete(h0);
1336 +        checkIncomplete(h1);
1337 +        checkIncomplete(h2);
1338          assertTrue(f.cancel(mayInterruptIfRunning));
1339 <        g.complete(v1);
1340 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1341 <
1342 <        checkCompletedWithWrappedCancellationException(h);
1339 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1340 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1341 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1342 >
1343 >        checkCompletedWithWrappedCancellationException(h0);
1344 >        checkCompletedWithWrappedCancellationException(h1);
1345 >        checkCompletedWithWrappedCancellationException(h2);
1346 >        checkCompletedWithWrappedCancellationException(h3);
1347 >        checkCompletedWithWrappedCancellationException(h4);
1348 >        checkCompletedWithWrappedCancellationException(h5);
1349          checkCancelled(f);
1350 <        assertEquals(r.invocationCount, 0);
1351 <        checkCompletedNormally(g, v1);
1192 <        }
1193 <    }
1350 >        for (Noop r : rs) r.assertNotInvoked();
1351 >    }}
1352  
1353      /**
1354 <     * thenAcceptBoth result completes normally after normal
1197 <     * completion of sources
1354 >     * thenRun result completes exceptionally if action does
1355       */
1356 <    public void testThenAcceptBoth_normalCompletion1() {
1356 >    public void testThenRun_actionFailed() {
1357          for (ExecutionMode m : ExecutionMode.values())
1358          for (Integer v1 : new Integer[] { 1, null })
1359 <        for (Integer v2 : new Integer[] { 2, null }) {
1203 <
1359 >    {
1360          final CompletableFuture<Integer> f = new CompletableFuture<>();
1361 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1362 <        final SubtractAction r = new SubtractAction();
1207 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1361 >        final FailingRunnable[] rs = new FailingRunnable[6];
1362 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1363  
1364 <        f.complete(v1);
1365 <        checkIncomplete(h);
1366 <        assertFalse(r.ran());
1367 <        g.complete(v2);
1368 <
1369 <        checkCompletedNormally(h, null);
1370 <        assertEquals(r.value, subtract(v1, v2));
1364 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1365 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1366 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1367 >        assertTrue(f.complete(v1));
1368 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1369 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1370 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1371 >
1372 >        checkCompletedWithWrappedCFException(h0);
1373 >        checkCompletedWithWrappedCFException(h1);
1374 >        checkCompletedWithWrappedCFException(h2);
1375 >        checkCompletedWithWrappedCFException(h3);
1376 >        checkCompletedWithWrappedCFException(h4);
1377 >        checkCompletedWithWrappedCFException(h5);
1378          checkCompletedNormally(f, v1);
1379 <        checkCompletedNormally(g, v2);
1218 <        }
1219 <    }
1220 <
1221 <    public void testThenAcceptBoth_normalCompletion2() {
1222 <        for (ExecutionMode m : ExecutionMode.values())
1223 <        for (Integer v1 : new Integer[] { 1, null })
1224 <        for (Integer v2 : new Integer[] { 2, null }) {
1225 <
1226 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1227 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1228 <        final SubtractAction r = new SubtractAction();
1229 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1379 >    }}
1380  
1381 <        g.complete(v2);
1382 <        checkIncomplete(h);
1383 <        assertFalse(r.ran());
1384 <        f.complete(v1);
1235 <
1236 <        checkCompletedNormally(h, null);
1237 <        assertEquals(r.value, subtract(v1, v2));
1238 <        checkCompletedNormally(f, v1);
1239 <        checkCompletedNormally(g, v2);
1240 <        }
1241 <    }
1242 <
1243 <    public void testThenAcceptBoth_normalCompletion3() {
1244 <        for (ExecutionMode m : ExecutionMode.values())
1245 <        for (Integer v1 : new Integer[] { 1, null })
1246 <        for (Integer v2 : new Integer[] { 2, null }) {
1247 <
1248 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1249 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1250 <        final SubtractAction r = new SubtractAction();
1251 <
1252 <        g.complete(v2);
1253 <        f.complete(v1);
1254 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1255 <
1256 <        checkCompletedNormally(h, null);
1257 <        assertEquals(r.value, subtract(v1, v2));
1258 <        checkCompletedNormally(f, v1);
1259 <        checkCompletedNormally(g, v2);
1260 <        }
1261 <    }
1262 <
1263 <    public void testThenAcceptBoth_normalCompletion4() {
1381 >    /**
1382 >     * thenApply result completes normally after normal completion of source
1383 >     */
1384 >    public void testThenApply_normalCompletion() {
1385          for (ExecutionMode m : ExecutionMode.values())
1386          for (Integer v1 : new Integer[] { 1, null })
1387 <        for (Integer v2 : new Integer[] { 2, null }) {
1267 <
1387 >    {
1388          final CompletableFuture<Integer> f = new CompletableFuture<>();
1389 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1390 <        final SubtractAction r = new SubtractAction();
1389 >        final IncFunction[] rs = new IncFunction[4];
1390 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1391  
1392 <        f.complete(v1);
1393 <        g.complete(v2);
1394 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1392 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1393 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1394 >        checkIncomplete(h0);
1395 >        checkIncomplete(h1);
1396 >        assertTrue(f.complete(v1));
1397 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1398 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1399  
1400 <        checkCompletedNormally(h, null);
1401 <        assertEquals(r.value, subtract(v1, v2));
1400 >        checkCompletedNormally(h0, inc(v1));
1401 >        checkCompletedNormally(h1, inc(v1));
1402 >        checkCompletedNormally(h2, inc(v1));
1403 >        checkCompletedNormally(h3, inc(v1));
1404          checkCompletedNormally(f, v1);
1405 <        checkCompletedNormally(g, v2);
1406 <        }
1281 <    }
1405 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1406 >    }}
1407  
1408      /**
1409 <     * thenAcceptBoth result completes exceptionally after exceptional
1410 <     * completion of either source
1409 >     * thenApply result completes exceptionally after exceptional
1410 >     * completion of source
1411       */
1412 <    public void testThenAcceptBoth_exceptionalCompletion1() {
1412 >    public void testThenApply_exceptionalCompletion() {
1413          for (ExecutionMode m : ExecutionMode.values())
1414 <        for (Integer v1 : new Integer[] { 1, null }) {
1290 <
1291 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1292 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1293 <        final SubtractAction r = new SubtractAction();
1294 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1414 >    {
1415          final CFException ex = new CFException();
1296
1297        f.completeExceptionally(ex);
1298        checkIncomplete(h);
1299        g.complete(v1);
1300
1301        checkCompletedWithWrappedCFException(h, ex);
1302        checkCompletedWithWrappedCFException(f, ex);
1303        assertEquals(r.invocationCount, 0);
1304        checkCompletedNormally(g, v1);
1305        }
1306    }
1307
1308    public void testThenAcceptBoth_exceptionalCompletion2() {
1309        for (ExecutionMode m : ExecutionMode.values())
1310        for (Integer v1 : new Integer[] { 1, null }) {
1311
1416          final CompletableFuture<Integer> f = new CompletableFuture<>();
1417 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1418 <        final SubtractAction r = new SubtractAction();
1315 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1316 <        final CFException ex = new CFException();
1317 <
1318 <        g.completeExceptionally(ex);
1319 <        checkIncomplete(h);
1320 <        f.complete(v1);
1417 >        final IncFunction[] rs = new IncFunction[4];
1418 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1419  
1420 <        checkCompletedWithWrappedCFException(h, ex);
1421 <        checkCompletedWithWrappedCFException(g, ex);
1422 <        assertEquals(r.invocationCount, 0);
1423 <        checkCompletedNormally(f, v1);
1424 <        }
1425 <    }
1420 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1421 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1422 >        assertTrue(f.completeExceptionally(ex));
1423 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1424 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1425 >
1426 >        checkCompletedWithWrappedException(h0, ex);
1427 >        checkCompletedWithWrappedException(h1, ex);
1428 >        checkCompletedWithWrappedException(h2, ex);
1429 >        checkCompletedWithWrappedException(h3, ex);
1430 >        checkCompletedExceptionally(f, ex);
1431 >        for (IncFunction r : rs) r.assertNotInvoked();
1432 >    }}
1433  
1434 <    public void testThenAcceptBoth_exceptionalCompletion3() {
1434 >    /**
1435 >     * thenApply result completes exceptionally if source cancelled
1436 >     */
1437 >    public void testThenApply_sourceCancelled() {
1438          for (ExecutionMode m : ExecutionMode.values())
1439 <        for (Integer v1 : new Integer[] { 1, null }) {
1440 <
1439 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1440 >    {
1441          final CompletableFuture<Integer> f = new CompletableFuture<>();
1442 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1443 <        final SubtractAction r = new SubtractAction();
1336 <        final CFException ex = new CFException();
1442 >        final IncFunction[] rs = new IncFunction[4];
1443 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1444  
1445 <        g.completeExceptionally(ex);
1446 <        f.complete(v1);
1447 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1445 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1446 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1447 >        assertTrue(f.cancel(mayInterruptIfRunning));
1448 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1449 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1450  
1451 <        checkCompletedWithWrappedCFException(h, ex);
1452 <        checkCompletedWithWrappedCFException(g, ex);
1453 <        assertEquals(r.invocationCount, 0);
1454 <        checkCompletedNormally(f, v1);
1455 <        }
1456 <    }
1451 >        checkCompletedWithWrappedCancellationException(h0);
1452 >        checkCompletedWithWrappedCancellationException(h1);
1453 >        checkCompletedWithWrappedCancellationException(h2);
1454 >        checkCompletedWithWrappedCancellationException(h3);
1455 >        checkCancelled(f);
1456 >        for (IncFunction r : rs) r.assertNotInvoked();
1457 >    }}
1458  
1459 <    public void testThenAcceptBoth_exceptionalCompletion4() {
1459 >    /**
1460 >     * thenApply result completes exceptionally if action does
1461 >     */
1462 >    public void testThenApply_actionFailed() {
1463          for (ExecutionMode m : ExecutionMode.values())
1464 <        for (Integer v1 : new Integer[] { 1, null }) {
1465 <
1464 >        for (Integer v1 : new Integer[] { 1, null })
1465 >    {
1466          final CompletableFuture<Integer> f = new CompletableFuture<>();
1467 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1468 <        final SubtractAction r = new SubtractAction();
1356 <        final CFException ex = new CFException();
1467 >        final FailingFunction[] rs = new FailingFunction[4];
1468 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1469  
1470 <        f.completeExceptionally(ex);
1471 <        g.complete(v1);
1472 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1470 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1471 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1472 >        assertTrue(f.complete(v1));
1473 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1474 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1475  
1476 <        checkCompletedWithWrappedCFException(h, ex);
1477 <        checkCompletedWithWrappedCFException(f, ex);
1478 <        assertFalse(r.ran());
1479 <        checkCompletedNormally(g, v1);
1480 <        }
1481 <    }
1476 >        checkCompletedWithWrappedCFException(h0);
1477 >        checkCompletedWithWrappedCFException(h1);
1478 >        checkCompletedWithWrappedCFException(h2);
1479 >        checkCompletedWithWrappedCFException(h3);
1480 >        checkCompletedNormally(f, v1);
1481 >    }}
1482  
1483      /**
1484 <     * thenAcceptBoth result completes exceptionally if action does
1484 >     * thenAccept result completes normally after normal completion of source
1485       */
1486 <    public void testThenAcceptBoth_actionFailed1() {
1486 >    public void testThenAccept_normalCompletion() {
1487          for (ExecutionMode m : ExecutionMode.values())
1488          for (Integer v1 : new Integer[] { 1, null })
1489 <        for (Integer v2 : new Integer[] { 2, null }) {
1376 <
1489 >    {
1490          final CompletableFuture<Integer> f = new CompletableFuture<>();
1491 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1492 <        final FailingBiConsumer r = new FailingBiConsumer();
1380 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1491 >        final NoopConsumer[] rs = new NoopConsumer[4];
1492 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1493  
1494 <        f.complete(v1);
1495 <        checkIncomplete(h);
1496 <        g.complete(v2);
1494 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1495 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1496 >        checkIncomplete(h0);
1497 >        checkIncomplete(h1);
1498 >        assertTrue(f.complete(v1));
1499 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1500 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1501  
1502 <        checkCompletedWithWrappedCFException(h);
1502 >        checkCompletedNormally(h0, null);
1503 >        checkCompletedNormally(h1, null);
1504 >        checkCompletedNormally(h2, null);
1505 >        checkCompletedNormally(h3, null);
1506          checkCompletedNormally(f, v1);
1507 <        checkCompletedNormally(g, v2);
1508 <        }
1390 <    }
1507 >        for (NoopConsumer r : rs) r.assertValue(v1);
1508 >    }}
1509  
1510 <    public void testThenAcceptBoth_actionFailed2() {
1510 >    /**
1511 >     * thenAccept result completes exceptionally after exceptional
1512 >     * completion of source
1513 >     */
1514 >    public void testThenAccept_exceptionalCompletion() {
1515          for (ExecutionMode m : ExecutionMode.values())
1516 <        for (Integer v1 : new Integer[] { 1, null })
1517 <        for (Integer v2 : new Integer[] { 2, null }) {
1396 <
1516 >    {
1517 >        final CFException ex = new CFException();
1518          final CompletableFuture<Integer> f = new CompletableFuture<>();
1519 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1520 <        final FailingBiConsumer r = new FailingBiConsumer();
1400 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1519 >        final NoopConsumer[] rs = new NoopConsumer[4];
1520 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1521  
1522 <        g.complete(v2);
1523 <        checkIncomplete(h);
1524 <        f.complete(v1);
1525 <
1526 <        checkCompletedWithWrappedCFException(h);
1527 <        checkCompletedNormally(f, v1);
1528 <        checkCompletedNormally(g, v2);
1529 <        }
1530 <    }
1522 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1523 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1524 >        assertTrue(f.completeExceptionally(ex));
1525 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1526 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1527 >
1528 >        checkCompletedWithWrappedException(h0, ex);
1529 >        checkCompletedWithWrappedException(h1, ex);
1530 >        checkCompletedWithWrappedException(h2, ex);
1531 >        checkCompletedWithWrappedException(h3, ex);
1532 >        checkCompletedExceptionally(f, ex);
1533 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1534 >    }}
1535  
1536      /**
1537 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1537 >     * thenAccept result completes exceptionally if source cancelled
1538       */
1539 <    public void testThenAcceptBoth_sourceCancelled1() {
1539 >    public void testThenAccept_sourceCancelled() {
1540          for (ExecutionMode m : ExecutionMode.values())
1541          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1542 <        for (Integer v1 : new Integer[] { 1, null }) {
1419 <
1542 >    {
1543          final CompletableFuture<Integer> f = new CompletableFuture<>();
1544 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1545 <        final SubtractAction r = new SubtractAction();
1423 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1544 >        final NoopConsumer[] rs = new NoopConsumer[4];
1545 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1546  
1547 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1548 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1549          assertTrue(f.cancel(mayInterruptIfRunning));
1550 <        checkIncomplete(h);
1551 <        g.complete(v1);
1550 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1551 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1552  
1553 <        checkCompletedWithWrappedCancellationException(h);
1553 >        checkCompletedWithWrappedCancellationException(h0);
1554 >        checkCompletedWithWrappedCancellationException(h1);
1555 >        checkCompletedWithWrappedCancellationException(h2);
1556 >        checkCompletedWithWrappedCancellationException(h3);
1557          checkCancelled(f);
1558 <        assertEquals(r.invocationCount, 0);
1559 <        checkCompletedNormally(g, v1);
1433 <        }
1434 <    }
1558 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1559 >    }}
1560  
1561 <    public void testThenAcceptBoth_sourceCancelled2() {
1561 >    /**
1562 >     * thenAccept result completes exceptionally if action does
1563 >     */
1564 >    public void testThenAccept_actionFailed() {
1565          for (ExecutionMode m : ExecutionMode.values())
1566 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1567 <        for (Integer v1 : new Integer[] { 1, null }) {
1440 <
1566 >        for (Integer v1 : new Integer[] { 1, null })
1567 >    {
1568          final CompletableFuture<Integer> f = new CompletableFuture<>();
1569 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1570 <        final SubtractAction r = new SubtractAction();
1444 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1569 >        final FailingConsumer[] rs = new FailingConsumer[4];
1570 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1571  
1572 <        assertTrue(g.cancel(mayInterruptIfRunning));
1573 <        checkIncomplete(h);
1574 <        f.complete(v1);
1572 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1573 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1574 >        assertTrue(f.complete(v1));
1575 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1576 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1577  
1578 <        checkCompletedWithWrappedCancellationException(h);
1579 <        checkCancelled(g);
1580 <        assertEquals(r.invocationCount, 0);
1578 >        checkCompletedWithWrappedCFException(h0);
1579 >        checkCompletedWithWrappedCFException(h1);
1580 >        checkCompletedWithWrappedCFException(h2);
1581 >        checkCompletedWithWrappedCFException(h3);
1582          checkCompletedNormally(f, v1);
1583 <        }
1455 <    }
1583 >    }}
1584  
1585 <    public void testThenAcceptBoth_sourceCancelled3() {
1585 >    /**
1586 >     * thenCombine result completes normally after normal completion
1587 >     * of sources
1588 >     */
1589 >    public void testThenCombine_normalCompletion() {
1590          for (ExecutionMode m : ExecutionMode.values())
1591 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1592 <        for (Integer v1 : new Integer[] { 1, null }) {
1593 <
1591 >        for (boolean fFirst : new boolean[] { true, false })
1592 >        for (Integer v1 : new Integer[] { 1, null })
1593 >        for (Integer v2 : new Integer[] { 2, null })
1594 >    {
1595          final CompletableFuture<Integer> f = new CompletableFuture<>();
1596          final CompletableFuture<Integer> g = new CompletableFuture<>();
1597 <        final SubtractAction r = new SubtractAction();
1597 >        final SubtractFunction[] rs = new SubtractFunction[6];
1598 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1599  
1600 <        assertTrue(g.cancel(mayInterruptIfRunning));
1601 <        f.complete(v1);
1602 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1600 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1601 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1602 >        final Integer w1 =  fFirst ? v1 : v2;
1603 >        final Integer w2 = !fFirst ? v1 : v2;
1604 >
1605 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1606 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1607 >        assertTrue(fst.complete(w1));
1608 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1609 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1610 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1611 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1612 >        checkCompletedNormally(h1, subtract(w1, w1));
1613 >        checkCompletedNormally(h3, subtract(w1, w1));
1614 >        rs[1].assertValue(subtract(w1, w1));
1615 >        rs[3].assertValue(subtract(w1, w1));
1616 >        assertTrue(snd.complete(w2));
1617 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1618 >
1619 >        checkCompletedNormally(h0, subtract(v1, v2));
1620 >        checkCompletedNormally(h2, subtract(v1, v2));
1621 >        checkCompletedNormally(h4, subtract(v1, v2));
1622 >        rs[0].assertValue(subtract(v1, v2));
1623 >        rs[2].assertValue(subtract(v1, v2));
1624 >        rs[4].assertValue(subtract(v1, v2));
1625  
1470        checkCompletedWithWrappedCancellationException(h);
1471        checkCancelled(g);
1472        assertEquals(r.invocationCount, 0);
1626          checkCompletedNormally(f, v1);
1627 <        }
1628 <    }
1476 <
1477 <    public void testThenAcceptBoth_sourceCancelled4() {
1478 <        for (ExecutionMode m : ExecutionMode.values())
1479 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1480 <        for (Integer v1 : new Integer[] { 1, null }) {
1481 <
1482 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1483 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1484 <        final SubtractAction r = new SubtractAction();
1485 <
1486 <        assertTrue(f.cancel(mayInterruptIfRunning));
1487 <        g.complete(v1);
1488 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1489 <
1490 <        checkCompletedWithWrappedCancellationException(h);
1491 <        checkCancelled(f);
1492 <        assertEquals(r.invocationCount, 0);
1493 <        checkCompletedNormally(g, v1);
1494 <        }
1495 <    }
1627 >        checkCompletedNormally(g, v2);
1628 >    }}
1629  
1630      /**
1631 <     * runAfterBoth result completes normally after normal
1632 <     * completion of sources
1631 >     * thenCombine result completes exceptionally after exceptional
1632 >     * completion of either source
1633       */
1634 <    public void testRunAfterBoth_normalCompletion1() {
1634 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1635          for (ExecutionMode m : ExecutionMode.values())
1636 +        for (boolean fFirst : new boolean[] { true, false })
1637 +        for (boolean failFirst : new boolean[] { true, false })
1638          for (Integer v1 : new Integer[] { 1, null })
1639 <        for (Integer v2 : new Integer[] { 2, null }) {
1505 <
1639 >    {
1640          final CompletableFuture<Integer> f = new CompletableFuture<>();
1641          final CompletableFuture<Integer> g = new CompletableFuture<>();
1642 <        final Noop r = new Noop();
1643 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1644 <
1645 <        f.complete(v1);
1646 <        checkIncomplete(h);
1647 <        assertFalse(r.ran);
1648 <        g.complete(v2);
1649 <
1650 <        checkCompletedNormally(h, null);
1651 <        assertEquals(r.invocationCount, 1);
1652 <        checkCompletedNormally(f, v1);
1653 <        checkCompletedNormally(g, v2);
1654 <        }
1655 <    }
1642 >        final CFException ex = new CFException();
1643 >        final SubtractFunction r1 = new SubtractFunction(m);
1644 >        final SubtractFunction r2 = new SubtractFunction(m);
1645 >        final SubtractFunction r3 = new SubtractFunction(m);
1646 >
1647 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1648 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1649 >        final Callable<Boolean> complete1 = failFirst ?
1650 >            () -> fst.completeExceptionally(ex) :
1651 >            () -> fst.complete(v1);
1652 >        final Callable<Boolean> complete2 = failFirst ?
1653 >            () -> snd.complete(v1) :
1654 >            () -> snd.completeExceptionally(ex);
1655 >
1656 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1657 >        assertTrue(complete1.call());
1658 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1659 >        checkIncomplete(h1);
1660 >        checkIncomplete(h2);
1661 >        assertTrue(complete2.call());
1662 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1663 >
1664 >        checkCompletedWithWrappedException(h1, ex);
1665 >        checkCompletedWithWrappedException(h2, ex);
1666 >        checkCompletedWithWrappedException(h3, ex);
1667 >        r1.assertNotInvoked();
1668 >        r2.assertNotInvoked();
1669 >        r3.assertNotInvoked();
1670 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1671 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1672 >    }}
1673  
1674 <    public void testRunAfterBoth_normalCompletion2() {
1674 >    /**
1675 >     * thenCombine result completes exceptionally if either source cancelled
1676 >     */
1677 >    public void testThenCombine_sourceCancelled() throws Throwable {
1678          for (ExecutionMode m : ExecutionMode.values())
1679 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1680 +        for (boolean fFirst : new boolean[] { true, false })
1681 +        for (boolean failFirst : new boolean[] { true, false })
1682          for (Integer v1 : new Integer[] { 1, null })
1683 <        for (Integer v2 : new Integer[] { 2, null }) {
1527 <
1683 >    {
1684          final CompletableFuture<Integer> f = new CompletableFuture<>();
1685          final CompletableFuture<Integer> g = new CompletableFuture<>();
1686 <        final Noop r = new Noop();
1687 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1688 <
1689 <        g.complete(v2);
1690 <        checkIncomplete(h);
1691 <        assertFalse(r.ran);
1692 <        f.complete(v1);
1686 >        final SubtractFunction r1 = new SubtractFunction(m);
1687 >        final SubtractFunction r2 = new SubtractFunction(m);
1688 >        final SubtractFunction r3 = new SubtractFunction(m);
1689 >
1690 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1691 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1692 >        final Callable<Boolean> complete1 = failFirst ?
1693 >            () -> fst.cancel(mayInterruptIfRunning) :
1694 >            () -> fst.complete(v1);
1695 >        final Callable<Boolean> complete2 = failFirst ?
1696 >            () -> snd.complete(v1) :
1697 >            () -> snd.cancel(mayInterruptIfRunning);
1698 >
1699 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1700 >        assertTrue(complete1.call());
1701 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1702 >        checkIncomplete(h1);
1703 >        checkIncomplete(h2);
1704 >        assertTrue(complete2.call());
1705 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1706 >
1707 >        checkCompletedWithWrappedCancellationException(h1);
1708 >        checkCompletedWithWrappedCancellationException(h2);
1709 >        checkCompletedWithWrappedCancellationException(h3);
1710 >        r1.assertNotInvoked();
1711 >        r2.assertNotInvoked();
1712 >        r3.assertNotInvoked();
1713 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1714 >        checkCancelled(failFirst ? fst : snd);
1715 >    }}
1716  
1717 <        checkCompletedNormally(h, null);
1718 <        assertEquals(r.invocationCount, 1);
1719 <        checkCompletedNormally(f, v1);
1720 <        checkCompletedNormally(g, v2);
1542 <        }
1543 <    }
1544 <
1545 <    public void testRunAfterBoth_normalCompletion3() {
1717 >    /**
1718 >     * thenCombine result completes exceptionally if action does
1719 >     */
1720 >    public void testThenCombine_actionFailed() {
1721          for (ExecutionMode m : ExecutionMode.values())
1722 +        for (boolean fFirst : new boolean[] { true, false })
1723          for (Integer v1 : new Integer[] { 1, null })
1724 <        for (Integer v2 : new Integer[] { 2, null }) {
1725 <
1724 >        for (Integer v2 : new Integer[] { 2, null })
1725 >    {
1726          final CompletableFuture<Integer> f = new CompletableFuture<>();
1727          final CompletableFuture<Integer> g = new CompletableFuture<>();
1728 <        final Noop r = new Noop();
1729 <
1730 <        g.complete(v2);
1731 <        f.complete(v1);
1732 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1733 <
1734 <        checkCompletedNormally(h, null);
1735 <        assertTrue(r.ran);
1728 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1729 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1730 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1731 >
1732 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1733 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1734 >        final Integer w1 =  fFirst ? v1 : v2;
1735 >        final Integer w2 = !fFirst ? v1 : v2;
1736 >
1737 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1738 >        assertTrue(fst.complete(w1));
1739 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1740 >        assertTrue(snd.complete(w2));
1741 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1742 >
1743 >        checkCompletedWithWrappedCFException(h1);
1744 >        checkCompletedWithWrappedCFException(h2);
1745 >        checkCompletedWithWrappedCFException(h3);
1746 >        r1.assertInvoked();
1747 >        r2.assertInvoked();
1748 >        r3.assertInvoked();
1749          checkCompletedNormally(f, v1);
1750          checkCompletedNormally(g, v2);
1751 <        }
1563 <    }
1751 >    }}
1752  
1753 <    public void testRunAfterBoth_normalCompletion4() {
1753 >    /**
1754 >     * thenAcceptBoth result completes normally after normal
1755 >     * completion of sources
1756 >     */
1757 >    public void testThenAcceptBoth_normalCompletion() {
1758          for (ExecutionMode m : ExecutionMode.values())
1759 +        for (boolean fFirst : new boolean[] { true, false })
1760          for (Integer v1 : new Integer[] { 1, null })
1761 <        for (Integer v2 : new Integer[] { 2, null }) {
1762 <
1761 >        for (Integer v2 : new Integer[] { 2, null })
1762 >    {
1763          final CompletableFuture<Integer> f = new CompletableFuture<>();
1764          final CompletableFuture<Integer> g = new CompletableFuture<>();
1765 <        final Noop r = new Noop();
1766 <
1767 <        f.complete(v1);
1768 <        g.complete(v2);
1769 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1770 <
1771 <        checkCompletedNormally(h, null);
1772 <        assertEquals(r.invocationCount, 1);
1765 >        final SubtractAction r1 = new SubtractAction(m);
1766 >        final SubtractAction r2 = new SubtractAction(m);
1767 >        final SubtractAction r3 = new SubtractAction(m);
1768 >
1769 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1770 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1771 >        final Integer w1 =  fFirst ? v1 : v2;
1772 >        final Integer w2 = !fFirst ? v1 : v2;
1773 >
1774 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1775 >        assertTrue(fst.complete(w1));
1776 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1777 >        checkIncomplete(h1);
1778 >        checkIncomplete(h2);
1779 >        r1.assertNotInvoked();
1780 >        r2.assertNotInvoked();
1781 >        assertTrue(snd.complete(w2));
1782 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1783 >
1784 >        checkCompletedNormally(h1, null);
1785 >        checkCompletedNormally(h2, null);
1786 >        checkCompletedNormally(h3, null);
1787 >        r1.assertValue(subtract(v1, v2));
1788 >        r2.assertValue(subtract(v1, v2));
1789 >        r3.assertValue(subtract(v1, v2));
1790          checkCompletedNormally(f, v1);
1791          checkCompletedNormally(g, v2);
1792 <        }
1583 <    }
1792 >    }}
1793  
1794      /**
1795 <     * runAfterBoth result completes exceptionally after exceptional
1795 >     * thenAcceptBoth result completes exceptionally after exceptional
1796       * completion of either source
1797       */
1798 <    public void testRunAfterBoth_exceptionalCompletion1() {
1590 <        for (ExecutionMode m : ExecutionMode.values())
1591 <        for (Integer v1 : new Integer[] { 1, null }) {
1592 <
1593 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1594 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1595 <        final Noop r = new Noop();
1596 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1597 <        final CFException ex = new CFException();
1598 <
1599 <        f.completeExceptionally(ex);
1600 <        checkIncomplete(h);
1601 <        g.complete(v1);
1602 <
1603 <        checkCompletedWithWrappedCFException(h, ex);
1604 <        checkCompletedWithWrappedCFException(f, ex);
1605 <        assertEquals(r.invocationCount, 0);
1606 <        checkCompletedNormally(g, v1);
1607 <        }
1608 <    }
1609 <
1610 <    public void testRunAfterBoth_exceptionalCompletion2() {
1611 <        for (ExecutionMode m : ExecutionMode.values())
1612 <        for (Integer v1 : new Integer[] { 1, null }) {
1613 <
1614 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1615 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1616 <        final Noop r = new Noop();
1617 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1618 <        final CFException ex = new CFException();
1619 <
1620 <        g.completeExceptionally(ex);
1621 <        checkIncomplete(h);
1622 <        f.complete(v1);
1623 <
1624 <        checkCompletedWithWrappedCFException(h, ex);
1625 <        checkCompletedWithWrappedCFException(g, ex);
1626 <        assertEquals(r.invocationCount, 0);
1627 <        checkCompletedNormally(f, v1);
1628 <        }
1629 <    }
1630 <
1631 <    public void testRunAfterBoth_exceptionalCompletion3() {
1798 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1799          for (ExecutionMode m : ExecutionMode.values())
1800 <        for (Integer v1 : new Integer[] { 1, null }) {
1801 <
1800 >        for (boolean fFirst : new boolean[] { true, false })
1801 >        for (boolean failFirst : new boolean[] { true, false })
1802 >        for (Integer v1 : new Integer[] { 1, null })
1803 >    {
1804          final CompletableFuture<Integer> f = new CompletableFuture<>();
1805          final CompletableFuture<Integer> g = new CompletableFuture<>();
1637        final Noop r = new Noop();
1806          final CFException ex = new CFException();
1807 +        final SubtractAction r1 = new SubtractAction(m);
1808 +        final SubtractAction r2 = new SubtractAction(m);
1809 +        final SubtractAction r3 = new SubtractAction(m);
1810 +
1811 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1812 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1813 +        final Callable<Boolean> complete1 = failFirst ?
1814 +            () -> fst.completeExceptionally(ex) :
1815 +            () -> fst.complete(v1);
1816 +        final Callable<Boolean> complete2 = failFirst ?
1817 +            () -> snd.complete(v1) :
1818 +            () -> snd.completeExceptionally(ex);
1819 +
1820 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1821 +        assertTrue(complete1.call());
1822 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1823 +        checkIncomplete(h1);
1824 +        checkIncomplete(h2);
1825 +        assertTrue(complete2.call());
1826 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1827 +
1828 +        checkCompletedWithWrappedException(h1, ex);
1829 +        checkCompletedWithWrappedException(h2, ex);
1830 +        checkCompletedWithWrappedException(h3, ex);
1831 +        r1.assertNotInvoked();
1832 +        r2.assertNotInvoked();
1833 +        r3.assertNotInvoked();
1834 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1835 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1836 +    }}
1837  
1838 <        g.completeExceptionally(ex);
1839 <        f.complete(v1);
1840 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1841 <
1644 <        checkCompletedWithWrappedCFException(h, ex);
1645 <        checkCompletedWithWrappedCFException(g, ex);
1646 <        assertEquals(r.invocationCount, 0);
1647 <        checkCompletedNormally(f, v1);
1648 <        }
1649 <    }
1650 <
1651 <    public void testRunAfterBoth_exceptionalCompletion4() {
1838 >    /**
1839 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1840 >     */
1841 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1842          for (ExecutionMode m : ExecutionMode.values())
1843 <        for (Integer v1 : new Integer[] { 1, null }) {
1844 <
1843 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1844 >        for (boolean fFirst : new boolean[] { true, false })
1845 >        for (boolean failFirst : new boolean[] { true, false })
1846 >        for (Integer v1 : new Integer[] { 1, null })
1847 >    {
1848          final CompletableFuture<Integer> f = new CompletableFuture<>();
1849          final CompletableFuture<Integer> g = new CompletableFuture<>();
1850 <        final Noop r = new Noop();
1851 <        final CFException ex = new CFException();
1852 <
1853 <        f.completeExceptionally(ex);
1854 <        g.complete(v1);
1855 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1856 <
1857 <        checkCompletedWithWrappedCFException(h, ex);
1858 <        checkCompletedWithWrappedCFException(f, ex);
1859 <        assertEquals(r.invocationCount, 0);
1860 <        checkCompletedNormally(g, v1);
1861 <        }
1862 <    }
1850 >        final SubtractAction r1 = new SubtractAction(m);
1851 >        final SubtractAction r2 = new SubtractAction(m);
1852 >        final SubtractAction r3 = new SubtractAction(m);
1853 >
1854 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1855 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1856 >        final Callable<Boolean> complete1 = failFirst ?
1857 >            () -> fst.cancel(mayInterruptIfRunning) :
1858 >            () -> fst.complete(v1);
1859 >        final Callable<Boolean> complete2 = failFirst ?
1860 >            () -> snd.complete(v1) :
1861 >            () -> snd.cancel(mayInterruptIfRunning);
1862 >
1863 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1864 >        assertTrue(complete1.call());
1865 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1866 >        checkIncomplete(h1);
1867 >        checkIncomplete(h2);
1868 >        assertTrue(complete2.call());
1869 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1870 >
1871 >        checkCompletedWithWrappedCancellationException(h1);
1872 >        checkCompletedWithWrappedCancellationException(h2);
1873 >        checkCompletedWithWrappedCancellationException(h3);
1874 >        r1.assertNotInvoked();
1875 >        r2.assertNotInvoked();
1876 >        r3.assertNotInvoked();
1877 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1878 >        checkCancelled(failFirst ? fst : snd);
1879 >    }}
1880  
1881      /**
1882 <     * runAfterBoth result completes exceptionally if action does
1882 >     * thenAcceptBoth result completes exceptionally if action does
1883       */
1884 <    public void testRunAfterBoth_actionFailed1() {
1884 >    public void testThenAcceptBoth_actionFailed() {
1885          for (ExecutionMode m : ExecutionMode.values())
1886 +        for (boolean fFirst : new boolean[] { true, false })
1887          for (Integer v1 : new Integer[] { 1, null })
1888 <        for (Integer v2 : new Integer[] { 2, null }) {
1889 <
1888 >        for (Integer v2 : new Integer[] { 2, null })
1889 >    {
1890          final CompletableFuture<Integer> f = new CompletableFuture<>();
1891          final CompletableFuture<Integer> g = new CompletableFuture<>();
1892 <        final FailingNoop r = new FailingNoop();
1893 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1894 <
1895 <        f.complete(v1);
1896 <        checkIncomplete(h);
1897 <        g.complete(v2);
1898 <
1899 <        checkCompletedWithWrappedCFException(h);
1892 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1893 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1894 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1895 >
1896 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1897 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1898 >        final Integer w1 =  fFirst ? v1 : v2;
1899 >        final Integer w2 = !fFirst ? v1 : v2;
1900 >
1901 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1902 >        assertTrue(fst.complete(w1));
1903 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1904 >        assertTrue(snd.complete(w2));
1905 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1906 >
1907 >        checkCompletedWithWrappedCFException(h1);
1908 >        checkCompletedWithWrappedCFException(h2);
1909 >        checkCompletedWithWrappedCFException(h3);
1910 >        r1.assertInvoked();
1911 >        r2.assertInvoked();
1912 >        r3.assertInvoked();
1913          checkCompletedNormally(f, v1);
1914          checkCompletedNormally(g, v2);
1915 <        }
1692 <    }
1915 >    }}
1916  
1917 <    public void testRunAfterBoth_actionFailed2() {
1917 >    /**
1918 >     * runAfterBoth result completes normally after normal
1919 >     * completion of sources
1920 >     */
1921 >    public void testRunAfterBoth_normalCompletion() {
1922          for (ExecutionMode m : ExecutionMode.values())
1923 +        for (boolean fFirst : new boolean[] { true, false })
1924          for (Integer v1 : new Integer[] { 1, null })
1925 <        for (Integer v2 : new Integer[] { 2, null }) {
1926 <
1925 >        for (Integer v2 : new Integer[] { 2, null })
1926 >    {
1927          final CompletableFuture<Integer> f = new CompletableFuture<>();
1928          final CompletableFuture<Integer> g = new CompletableFuture<>();
1929 <        final FailingNoop r = new FailingNoop();
1930 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1931 <
1932 <        g.complete(v2);
1933 <        checkIncomplete(h);
1934 <        f.complete(v1);
1935 <
1936 <        checkCompletedWithWrappedCFException(h);
1929 >        final Noop r1 = new Noop(m);
1930 >        final Noop r2 = new Noop(m);
1931 >        final Noop r3 = new Noop(m);
1932 >
1933 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1934 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1935 >        final Integer w1 =  fFirst ? v1 : v2;
1936 >        final Integer w2 = !fFirst ? v1 : v2;
1937 >
1938 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1939 >        assertTrue(fst.complete(w1));
1940 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1941 >        checkIncomplete(h1);
1942 >        checkIncomplete(h2);
1943 >        r1.assertNotInvoked();
1944 >        r2.assertNotInvoked();
1945 >        assertTrue(snd.complete(w2));
1946 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1947 >
1948 >        checkCompletedNormally(h1, null);
1949 >        checkCompletedNormally(h2, null);
1950 >        checkCompletedNormally(h3, null);
1951 >        r1.assertInvoked();
1952 >        r2.assertInvoked();
1953 >        r3.assertInvoked();
1954          checkCompletedNormally(f, v1);
1955          checkCompletedNormally(g, v2);
1956 <        }
1712 <    }
1956 >    }}
1957  
1958      /**
1959 <     * runAfterBoth result completes exceptionally if either source cancelled
1959 >     * runAfterBoth result completes exceptionally after exceptional
1960 >     * completion of either source
1961       */
1962 <    public void testRunAfterBoth_sourceCancelled1() {
1962 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
1963          for (ExecutionMode m : ExecutionMode.values())
1964 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1965 <        for (Integer v1 : new Integer[] { 1, null }) {
1966 <
1964 >        for (boolean fFirst : new boolean[] { true, false })
1965 >        for (boolean failFirst : new boolean[] { true, false })
1966 >        for (Integer v1 : new Integer[] { 1, null })
1967 >    {
1968          final CompletableFuture<Integer> f = new CompletableFuture<>();
1969          final CompletableFuture<Integer> g = new CompletableFuture<>();
1970 <        final Noop r = new Noop();
1971 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1972 <
1973 <        assertTrue(f.cancel(mayInterruptIfRunning));
1974 <        checkIncomplete(h);
1975 <        g.complete(v1);
1976 <
1977 <        checkCompletedWithWrappedCancellationException(h);
1978 <        checkCancelled(f);
1979 <        assertEquals(r.invocationCount, 0);
1980 <        checkCompletedNormally(g, v1);
1981 <        }
1982 <    }
1970 >        final CFException ex = new CFException();
1971 >        final Noop r1 = new Noop(m);
1972 >        final Noop r2 = new Noop(m);
1973 >        final Noop r3 = new Noop(m);
1974 >
1975 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1976 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1977 >        final Callable<Boolean> complete1 = failFirst ?
1978 >            () -> fst.completeExceptionally(ex) :
1979 >            () -> fst.complete(v1);
1980 >        final Callable<Boolean> complete2 = failFirst ?
1981 >            () -> snd.complete(v1) :
1982 >            () -> snd.completeExceptionally(ex);
1983 >
1984 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1985 >        assertTrue(complete1.call());
1986 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1987 >        checkIncomplete(h1);
1988 >        checkIncomplete(h2);
1989 >        assertTrue(complete2.call());
1990 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1991 >
1992 >        checkCompletedWithWrappedException(h1, ex);
1993 >        checkCompletedWithWrappedException(h2, ex);
1994 >        checkCompletedWithWrappedException(h3, ex);
1995 >        r1.assertNotInvoked();
1996 >        r2.assertNotInvoked();
1997 >        r3.assertNotInvoked();
1998 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1999 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2000 >    }}
2001  
2002 <    public void testRunAfterBoth_sourceCancelled2() {
2002 >    /**
2003 >     * runAfterBoth result completes exceptionally if either source cancelled
2004 >     */
2005 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2006          for (ExecutionMode m : ExecutionMode.values())
2007          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2008 <        for (Integer v1 : new Integer[] { 1, null }) {
2009 <
2008 >        for (boolean fFirst : new boolean[] { true, false })
2009 >        for (boolean failFirst : new boolean[] { true, false })
2010 >        for (Integer v1 : new Integer[] { 1, null })
2011 >    {
2012          final CompletableFuture<Integer> f = new CompletableFuture<>();
2013          final CompletableFuture<Integer> g = new CompletableFuture<>();
2014 <        final Noop r = new Noop();
2015 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2016 <
2017 <        assertTrue(g.cancel(mayInterruptIfRunning));
2018 <        checkIncomplete(h);
2019 <        f.complete(v1);
2020 <
2021 <        checkCompletedWithWrappedCancellationException(h);
2022 <        checkCancelled(g);
2023 <        assertEquals(r.invocationCount, 0);
2024 <        checkCompletedNormally(f, v1);
2025 <        }
2026 <    }
2014 >        final Noop r1 = new Noop(m);
2015 >        final Noop r2 = new Noop(m);
2016 >        final Noop r3 = new Noop(m);
2017 >
2018 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2019 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2020 >        final Callable<Boolean> complete1 = failFirst ?
2021 >            () -> fst.cancel(mayInterruptIfRunning) :
2022 >            () -> fst.complete(v1);
2023 >        final Callable<Boolean> complete2 = failFirst ?
2024 >            () -> snd.complete(v1) :
2025 >            () -> snd.cancel(mayInterruptIfRunning);
2026 >
2027 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2028 >        assertTrue(complete1.call());
2029 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2030 >        checkIncomplete(h1);
2031 >        checkIncomplete(h2);
2032 >        assertTrue(complete2.call());
2033 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2034 >
2035 >        checkCompletedWithWrappedCancellationException(h1);
2036 >        checkCompletedWithWrappedCancellationException(h2);
2037 >        checkCompletedWithWrappedCancellationException(h3);
2038 >        r1.assertNotInvoked();
2039 >        r2.assertNotInvoked();
2040 >        r3.assertNotInvoked();
2041 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2042 >        checkCancelled(failFirst ? fst : snd);
2043 >    }}
2044  
2045 <    public void testRunAfterBoth_sourceCancelled3() {
2045 >    /**
2046 >     * runAfterBoth result completes exceptionally if action does
2047 >     */
2048 >    public void testRunAfterBoth_actionFailed() {
2049          for (ExecutionMode m : ExecutionMode.values())
2050 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2051 <        for (Integer v1 : new Integer[] { 1, null }) {
2052 <
2050 >        for (boolean fFirst : new boolean[] { true, false })
2051 >        for (Integer v1 : new Integer[] { 1, null })
2052 >        for (Integer v2 : new Integer[] { 2, null })
2053 >    {
2054          final CompletableFuture<Integer> f = new CompletableFuture<>();
2055          final CompletableFuture<Integer> g = new CompletableFuture<>();
2056 <        final Noop r = new Noop();
2057 <
2058 <        assertTrue(g.cancel(mayInterruptIfRunning));
2059 <        f.complete(v1);
2060 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2061 <
2062 <        checkCompletedWithWrappedCancellationException(h);
2063 <        checkCancelled(g);
2064 <        assertEquals(r.invocationCount, 0);
2056 >        final FailingRunnable r1 = new FailingRunnable(m);
2057 >        final FailingRunnable r2 = new FailingRunnable(m);
2058 >        final FailingRunnable r3 = new FailingRunnable(m);
2059 >
2060 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2061 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2062 >        final Integer w1 =  fFirst ? v1 : v2;
2063 >        final Integer w2 = !fFirst ? v1 : v2;
2064 >
2065 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2066 >        assertTrue(fst.complete(w1));
2067 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2068 >        assertTrue(snd.complete(w2));
2069 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2070 >
2071 >        checkCompletedWithWrappedCFException(h1);
2072 >        checkCompletedWithWrappedCFException(h2);
2073 >        checkCompletedWithWrappedCFException(h3);
2074 >        r1.assertInvoked();
2075 >        r2.assertInvoked();
2076 >        r3.assertInvoked();
2077          checkCompletedNormally(f, v1);
2078 <        }
2079 <    }
1778 <
1779 <    public void testRunAfterBoth_sourceCancelled4() {
1780 <        for (ExecutionMode m : ExecutionMode.values())
1781 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1782 <        for (Integer v1 : new Integer[] { 1, null }) {
1783 <
1784 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1785 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1786 <        final Noop r = new Noop();
1787 <
1788 <        assertTrue(f.cancel(mayInterruptIfRunning));
1789 <        g.complete(v1);
1790 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1791 <
1792 <        checkCompletedWithWrappedCancellationException(h);
1793 <        checkCancelled(f);
1794 <        assertEquals(r.invocationCount, 0);
1795 <        checkCompletedNormally(g, v1);
1796 <        }
1797 <    }
2078 >        checkCompletedNormally(g, v2);
2079 >    }}
2080  
2081      /**
2082       * applyToEither result completes normally after normal completion
2083       * of either source
2084       */
2085 <    public void testApplyToEither_normalCompletion1() {
2085 >    public void testApplyToEither_normalCompletion() {
2086          for (ExecutionMode m : ExecutionMode.values())
2087          for (Integer v1 : new Integer[] { 1, null })
2088 <        for (Integer v2 : new Integer[] { 2, null }) {
2089 <
2088 >        for (Integer v2 : new Integer[] { 2, null })
2089 >    {
2090          final CompletableFuture<Integer> f = new CompletableFuture<>();
2091          final CompletableFuture<Integer> g = new CompletableFuture<>();
2092 <        final IncFunction r = new IncFunction();
2093 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2092 >        final IncFunction[] rs = new IncFunction[6];
2093 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2094  
2095 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2096 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2097 +        checkIncomplete(h0);
2098 +        checkIncomplete(h1);
2099 +        rs[0].assertNotInvoked();
2100 +        rs[1].assertNotInvoked();
2101          f.complete(v1);
2102 <        checkCompletedNormally(h, inc(v1));
2102 >        checkCompletedNormally(h0, inc(v1));
2103 >        checkCompletedNormally(h1, inc(v1));
2104 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2105 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2106 >        checkCompletedNormally(h2, inc(v1));
2107 >        checkCompletedNormally(h3, inc(v1));
2108          g.complete(v2);
2109  
2110 <        checkCompletedNormally(f, v1);
2111 <        checkCompletedNormally(g, v2);
2112 <        checkCompletedNormally(h, inc(v1));
2113 <        }
2114 <    }
2115 <
2116 <    public void testApplyToEither_normalCompletion2() {
2117 <        for (ExecutionMode m : ExecutionMode.values())
2118 <        for (Integer v1 : new Integer[] { 1, null })
1826 <        for (Integer v2 : new Integer[] { 2, null }) {
1827 <
1828 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1829 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1830 <        final IncFunction r = new IncFunction();
1831 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1832 <
1833 <        g.complete(v2);
1834 <        checkCompletedNormally(h, inc(v2));
1835 <        f.complete(v1);
2110 >        // unspecified behavior - both source completions available
2111 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2112 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2113 >        rs[4].assertValue(h4.join());
2114 >        rs[5].assertValue(h5.join());
2115 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2116 >                   Objects.equals(inc(v2), h4.join()));
2117 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2118 >                   Objects.equals(inc(v2), h5.join()));
2119  
2120          checkCompletedNormally(f, v1);
2121          checkCompletedNormally(g, v2);
2122 <        checkCompletedNormally(h, inc(v2));
2123 <        }
2124 <    }
2125 <    public void testApplyToEither_normalCompletion3() {
2126 <        for (ExecutionMode m : ExecutionMode.values())
2127 <        for (Integer v1 : new Integer[] { 1, null })
1845 <        for (Integer v2 : new Integer[] { 2, null }) {
1846 <
1847 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1848 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1849 <        final IncFunction r = new IncFunction();
1850 <
1851 <        f.complete(v1);
1852 <        g.complete(v2);
1853 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1854 <
1855 <        checkCompletedNormally(f, v1);
1856 <        checkCompletedNormally(g, v2);
1857 <
1858 <        // unspecified behavior
1859 <        assertTrue(Objects.equals(h.join(), inc(v1)) ||
1860 <                   Objects.equals(h.join(), inc(v2)));
1861 <        assertEquals(r.invocationCount, 1);
1862 <        }
1863 <    }
2122 >        checkCompletedNormally(h0, inc(v1));
2123 >        checkCompletedNormally(h1, inc(v1));
2124 >        checkCompletedNormally(h2, inc(v1));
2125 >        checkCompletedNormally(h3, inc(v1));
2126 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2127 >    }}
2128  
2129      /**
2130       * applyToEither result completes exceptionally after exceptional
2131       * completion of either source
2132       */
2133 <    public void testApplyToEither_exceptionalCompletion1() {
2133 >    public void testApplyToEither_exceptionalCompletion() {
2134          for (ExecutionMode m : ExecutionMode.values())
2135 <        for (Integer v1 : new Integer[] { 1, null }) {
2136 <
2135 >        for (Integer v1 : new Integer[] { 1, null })
2136 >    {
2137          final CompletableFuture<Integer> f = new CompletableFuture<>();
2138          final CompletableFuture<Integer> g = new CompletableFuture<>();
1875        final IncFunction r = new IncFunction();
1876        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2139          final CFException ex = new CFException();
2140 +        final IncFunction[] rs = new IncFunction[6];
2141 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2142  
2143 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2144 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2145 +        checkIncomplete(h0);
2146 +        checkIncomplete(h1);
2147 +        rs[0].assertNotInvoked();
2148 +        rs[1].assertNotInvoked();
2149          f.completeExceptionally(ex);
2150 <        checkCompletedWithWrappedCFException(h, ex);
2150 >        checkCompletedWithWrappedException(h0, ex);
2151 >        checkCompletedWithWrappedException(h1, ex);
2152 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2153 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2154 >        checkCompletedWithWrappedException(h2, ex);
2155 >        checkCompletedWithWrappedException(h3, ex);
2156          g.complete(v1);
2157  
2158 <        assertEquals(r.invocationCount, 0);
2159 <        checkCompletedNormally(g, v1);
2160 <        checkCompletedWithWrappedCFException(f, ex);
2161 <        checkCompletedWithWrappedCFException(h, ex);
2162 <        }
2163 <    }
2164 <
2165 <    public void testApplyToEither_exceptionalCompletion2() {
2166 <        for (ExecutionMode m : ExecutionMode.values())
1892 <        for (Integer v1 : new Integer[] { 1, null }) {
1893 <
1894 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1895 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1896 <        final IncFunction r = new IncFunction();
1897 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1898 <        final CFException ex = new CFException();
1899 <
1900 <        g.completeExceptionally(ex);
1901 <        checkCompletedWithWrappedCFException(h, ex);
1902 <        f.complete(v1);
1903 <
1904 <        assertEquals(r.invocationCount, 0);
1905 <        checkCompletedNormally(f, v1);
1906 <        checkCompletedWithWrappedCFException(g, ex);
1907 <        checkCompletedWithWrappedCFException(h, ex);
2158 >        // unspecified behavior - both source completions available
2159 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2160 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2161 >        try {
2162 >            assertEquals(inc(v1), h4.join());
2163 >            rs[4].assertValue(inc(v1));
2164 >        } catch (CompletionException ok) {
2165 >            checkCompletedWithWrappedException(h4, ex);
2166 >            rs[4].assertNotInvoked();
2167          }
1909    }
1910
1911    public void testApplyToEither_exceptionalCompletion3() {
1912        for (ExecutionMode m : ExecutionMode.values())
1913        for (Integer v1 : new Integer[] { 1, null }) {
1914
1915        final CompletableFuture<Integer> f = new CompletableFuture<>();
1916        final CompletableFuture<Integer> g = new CompletableFuture<>();
1917        final IncFunction r = new IncFunction();
1918        final CFException ex = new CFException();
1919
1920        g.completeExceptionally(ex);
1921        f.complete(v1);
1922        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1923
1924        // unspecified behavior
1925        Integer v;
2168          try {
2169 <            assertEquals(h.join(), inc(v1));
2170 <            assertEquals(r.invocationCount, 1);
2169 >            assertEquals(inc(v1), h5.join());
2170 >            rs[5].assertValue(inc(v1));
2171          } catch (CompletionException ok) {
2172 <            checkCompletedWithWrappedCFException(h, ex);
2173 <            assertEquals(r.invocationCount, 0);
2172 >            checkCompletedWithWrappedException(h5, ex);
2173 >            rs[5].assertNotInvoked();
2174          }
2175  
2176 <        checkCompletedWithWrappedCFException(g, ex);
2177 <        checkCompletedNormally(f, v1);
2178 <        }
2179 <    }
2176 >        checkCompletedExceptionally(f, ex);
2177 >        checkCompletedNormally(g, v1);
2178 >        checkCompletedWithWrappedException(h0, ex);
2179 >        checkCompletedWithWrappedException(h1, ex);
2180 >        checkCompletedWithWrappedException(h2, ex);
2181 >        checkCompletedWithWrappedException(h3, ex);
2182 >        checkCompletedWithWrappedException(h4, ex);
2183 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2184 >    }}
2185  
2186 <    public void testApplyToEither_exceptionalCompletion4() {
2186 >    public void testApplyToEither_exceptionalCompletion2() {
2187          for (ExecutionMode m : ExecutionMode.values())
2188 <        for (Integer v1 : new Integer[] { 1, null }) {
2189 <
2188 >        for (boolean fFirst : new boolean[] { true, false })
2189 >        for (Integer v1 : new Integer[] { 1, null })
2190 >    {
2191          final CompletableFuture<Integer> f = new CompletableFuture<>();
2192          final CompletableFuture<Integer> g = new CompletableFuture<>();
1945        final IncFunction r = new IncFunction();
2193          final CFException ex = new CFException();
2194 +        final IncFunction[] rs = new IncFunction[6];
2195 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2196  
2197 <        f.completeExceptionally(ex);
2198 <        g.complete(v1);
2199 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2197 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2198 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2199 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2200 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2201 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2202 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2203  
2204 <        // unspecified behavior
1953 <        Integer v;
2204 >        // unspecified behavior - both source completions available
2205          try {
2206 <            assertEquals(h.join(), inc(v1));
2207 <            assertEquals(r.invocationCount, 1);
2206 >            assertEquals(inc(v1), h0.join());
2207 >            rs[0].assertValue(inc(v1));
2208          } catch (CompletionException ok) {
2209 <            checkCompletedWithWrappedCFException(h, ex);
2210 <            assertEquals(r.invocationCount, 0);
2209 >            checkCompletedWithWrappedException(h0, ex);
2210 >            rs[0].assertNotInvoked();
2211          }
2212 <
2213 <        checkCompletedWithWrappedCFException(f, ex);
2214 <        checkCompletedNormally(g, v1);
2212 >        try {
2213 >            assertEquals(inc(v1), h1.join());
2214 >            rs[1].assertValue(inc(v1));
2215 >        } catch (CompletionException ok) {
2216 >            checkCompletedWithWrappedException(h1, ex);
2217 >            rs[1].assertNotInvoked();
2218          }
2219 <    }
2220 <
2221 <    /**
2222 <     * applyToEither result completes exceptionally if action does
2223 <     */
2224 <    public void testApplyToEither_actionFailed1() {
2225 <        for (ExecutionMode m : ExecutionMode.values())
2226 <        for (Integer v1 : new Integer[] { 1, null })
2227 <        for (Integer v2 : new Integer[] { 2, null }) {
2228 <
2229 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2230 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2231 <        final FailingFunction r = new FailingFunction();
1978 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1979 <
1980 <        f.complete(v1);
1981 <        checkCompletedWithWrappedCFException(h);
1982 <        g.complete(v2);
1983 <        checkCompletedNormally(f, v1);
1984 <        checkCompletedNormally(g, v2);
2219 >        try {
2220 >            assertEquals(inc(v1), h2.join());
2221 >            rs[2].assertValue(inc(v1));
2222 >        } catch (CompletionException ok) {
2223 >            checkCompletedWithWrappedException(h2, ex);
2224 >            rs[2].assertNotInvoked();
2225 >        }
2226 >        try {
2227 >            assertEquals(inc(v1), h3.join());
2228 >            rs[3].assertValue(inc(v1));
2229 >        } catch (CompletionException ok) {
2230 >            checkCompletedWithWrappedException(h3, ex);
2231 >            rs[3].assertNotInvoked();
2232          }
1986    }
1987
1988    public void testApplyToEither_actionFailed2() {
1989        for (ExecutionMode m : ExecutionMode.values())
1990        for (Integer v1 : new Integer[] { 1, null })
1991        for (Integer v2 : new Integer[] { 2, null }) {
1992
1993        final CompletableFuture<Integer> f = new CompletableFuture<>();
1994        final CompletableFuture<Integer> g = new CompletableFuture<>();
1995        final FailingFunction r = new FailingFunction();
1996        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2233  
1998        g.complete(v2);
1999        checkCompletedWithWrappedCFException(h);
2000        f.complete(v1);
2234          checkCompletedNormally(f, v1);
2235 <        checkCompletedNormally(g, v2);
2236 <        }
2004 <    }
2235 >        checkCompletedExceptionally(g, ex);
2236 >    }}
2237  
2238      /**
2239       * applyToEither result completes exceptionally if either source cancelled
2240       */
2241 <    public void testApplyToEither_sourceCancelled1() {
2241 >    public void testApplyToEither_sourceCancelled() {
2242          for (ExecutionMode m : ExecutionMode.values())
2243          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2244 <        for (Integer v1 : new Integer[] { 1, null }) {
2245 <
2244 >        for (Integer v1 : new Integer[] { 1, null })
2245 >    {
2246          final CompletableFuture<Integer> f = new CompletableFuture<>();
2247          final CompletableFuture<Integer> g = new CompletableFuture<>();
2248 <        final IncFunction r = new IncFunction();
2249 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2248 >        final IncFunction[] rs = new IncFunction[6];
2249 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2250  
2251 <        assertTrue(f.cancel(mayInterruptIfRunning));
2252 <        checkCompletedWithWrappedCancellationException(h);
2251 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2252 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2253 >        checkIncomplete(h0);
2254 >        checkIncomplete(h1);
2255 >        rs[0].assertNotInvoked();
2256 >        rs[1].assertNotInvoked();
2257 >        f.cancel(mayInterruptIfRunning);
2258 >        checkCompletedWithWrappedCancellationException(h0);
2259 >        checkCompletedWithWrappedCancellationException(h1);
2260 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2261 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2262 >        checkCompletedWithWrappedCancellationException(h2);
2263 >        checkCompletedWithWrappedCancellationException(h3);
2264          g.complete(v1);
2265  
2266 +        // unspecified behavior - both source completions available
2267 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2268 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2269 +        try {
2270 +            assertEquals(inc(v1), h4.join());
2271 +            rs[4].assertValue(inc(v1));
2272 +        } catch (CompletionException ok) {
2273 +            checkCompletedWithWrappedCancellationException(h4);
2274 +            rs[4].assertNotInvoked();
2275 +        }
2276 +        try {
2277 +            assertEquals(inc(v1), h5.join());
2278 +            rs[5].assertValue(inc(v1));
2279 +        } catch (CompletionException ok) {
2280 +            checkCompletedWithWrappedCancellationException(h5);
2281 +            rs[5].assertNotInvoked();
2282 +        }
2283 +
2284          checkCancelled(f);
2024        assertEquals(r.invocationCount, 0);
2285          checkCompletedNormally(g, v1);
2286 <        checkCompletedWithWrappedCancellationException(h);
2287 <        }
2288 <    }
2286 >        checkCompletedWithWrappedCancellationException(h0);
2287 >        checkCompletedWithWrappedCancellationException(h1);
2288 >        checkCompletedWithWrappedCancellationException(h2);
2289 >        checkCompletedWithWrappedCancellationException(h3);
2290 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2291 >    }}
2292  
2293      public void testApplyToEither_sourceCancelled2() {
2294          for (ExecutionMode m : ExecutionMode.values())
2295          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2296 <        for (Integer v1 : new Integer[] { 1, null }) {
2297 <
2296 >        for (boolean fFirst : new boolean[] { true, false })
2297 >        for (Integer v1 : new Integer[] { 1, null })
2298 >    {
2299          final CompletableFuture<Integer> f = new CompletableFuture<>();
2300          final CompletableFuture<Integer> g = new CompletableFuture<>();
2301 <        final IncFunction r = new IncFunction();
2302 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2301 >        final IncFunction[] rs = new IncFunction[6];
2302 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2303  
2304 <        assertTrue(g.cancel(mayInterruptIfRunning));
2305 <        checkCompletedWithWrappedCancellationException(h);
2306 <        f.complete(v1);
2304 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2305 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2306 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2307 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2308 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2309 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2310  
2311 <        checkCancelled(g);
2312 <        assertEquals(r.invocationCount, 0);
2313 <        checkCompletedNormally(f, v1);
2314 <        checkCompletedWithWrappedCancellationException(h);
2311 >        // unspecified behavior - both source completions available
2312 >        try {
2313 >            assertEquals(inc(v1), h0.join());
2314 >            rs[0].assertValue(inc(v1));
2315 >        } catch (CompletionException ok) {
2316 >            checkCompletedWithWrappedCancellationException(h0);
2317 >            rs[0].assertNotInvoked();
2318          }
2049    }
2050
2051    public void testApplyToEither_sourceCancelled3() {
2052        for (ExecutionMode m : ExecutionMode.values())
2053        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2054        for (Integer v1 : new Integer[] { 1, null }) {
2055
2056        final CompletableFuture<Integer> f = new CompletableFuture<>();
2057        final CompletableFuture<Integer> g = new CompletableFuture<>();
2058        final IncFunction r = new IncFunction();
2059
2060        assertTrue(g.cancel(mayInterruptIfRunning));
2061        f.complete(v1);
2062        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2063
2064        // unspecified behavior
2065        Integer v;
2319          try {
2320 <            assertEquals(h.join(), inc(v1));
2321 <            assertEquals(r.invocationCount, 1);
2320 >            assertEquals(inc(v1), h1.join());
2321 >            rs[1].assertValue(inc(v1));
2322          } catch (CompletionException ok) {
2323 <            checkCompletedWithWrappedCancellationException(h);
2324 <            assertEquals(r.invocationCount, 0);
2323 >            checkCompletedWithWrappedCancellationException(h1);
2324 >            rs[1].assertNotInvoked();
2325          }
2326 <
2327 <        checkCancelled(g);
2328 <        checkCompletedNormally(f, v1);
2326 >        try {
2327 >            assertEquals(inc(v1), h2.join());
2328 >            rs[2].assertValue(inc(v1));
2329 >        } catch (CompletionException ok) {
2330 >            checkCompletedWithWrappedCancellationException(h2);
2331 >            rs[2].assertNotInvoked();
2332          }
2077    }
2078
2079    public void testApplyToEither_sourceCancelled4() {
2080        for (ExecutionMode m : ExecutionMode.values())
2081        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
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
2088        assertTrue(f.cancel(mayInterruptIfRunning));
2089        g.complete(v1);
2090        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2091
2092        // unspecified behavior
2093        Integer v;
2333          try {
2334 <            assertEquals(h.join(), inc(v1));
2335 <            assertEquals(r.invocationCount, 1);
2334 >            assertEquals(inc(v1), h3.join());
2335 >            rs[3].assertValue(inc(v1));
2336          } catch (CompletionException ok) {
2337 <            checkCompletedWithWrappedCancellationException(h);
2338 <            assertEquals(r.invocationCount, 0);
2337 >            checkCompletedWithWrappedCancellationException(h3);
2338 >            rs[3].assertNotInvoked();
2339          }
2340  
2341 <        checkCancelled(f);
2342 <        checkCompletedNormally(g, v1);
2343 <        }
2105 <    }
2341 >        checkCompletedNormally(f, v1);
2342 >        checkCancelled(g);
2343 >    }}
2344  
2345      /**
2346 <     * acceptEither result completes normally after normal completion
2109 <     * of either source
2346 >     * applyToEither result completes exceptionally if action does
2347       */
2348 <    public void testAcceptEither_normalCompletion1() {
2348 >    public void testApplyToEither_actionFailed() {
2349          for (ExecutionMode m : ExecutionMode.values())
2350          for (Integer v1 : new Integer[] { 1, null })
2351 <        for (Integer v2 : new Integer[] { 2, null }) {
2352 <
2351 >        for (Integer v2 : new Integer[] { 2, null })
2352 >    {
2353          final CompletableFuture<Integer> f = new CompletableFuture<>();
2354          final CompletableFuture<Integer> g = new CompletableFuture<>();
2355 <        final IncAction r = new IncAction();
2356 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2355 >        final FailingFunction[] rs = new FailingFunction[6];
2356 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2357  
2358 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2359 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2360          f.complete(v1);
2361 <        checkCompletedNormally(h, null);
2362 <        assertEquals(r.value, inc(v1));
2363 <        g.complete(v2);
2364 <
2365 <        checkCompletedNormally(f, v1);
2366 <        checkCompletedNormally(g, v2);
2367 <        checkCompletedNormally(h, null);
2129 <        }
2130 <    }
2361 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2362 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2363 >        checkCompletedWithWrappedCFException(h0);
2364 >        checkCompletedWithWrappedCFException(h1);
2365 >        checkCompletedWithWrappedCFException(h2);
2366 >        checkCompletedWithWrappedCFException(h3);
2367 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2368  
2369 <    public void testAcceptEither_normalCompletion2() {
2133 <        for (ExecutionMode m : ExecutionMode.values())
2134 <        for (Integer v1 : new Integer[] { 1, null })
2135 <        for (Integer v2 : new Integer[] { 2, null }) {
2369 >        g.complete(v2);
2370  
2371 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2372 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2373 <        final IncAction r = new IncAction();
2140 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2371 >        // unspecified behavior - both source completions available
2372 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2373 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2374  
2375 <        g.complete(v2);
2376 <        checkCompletedNormally(h, null);
2377 <        assertEquals(r.value, inc(v2));
2378 <        f.complete(v1);
2375 >        checkCompletedWithWrappedCFException(h4);
2376 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2377 >                   Objects.equals(v2, rs[4].value));
2378 >        checkCompletedWithWrappedCFException(h5);
2379 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2380 >                   Objects.equals(v2, rs[5].value));
2381  
2382          checkCompletedNormally(f, v1);
2383          checkCompletedNormally(g, v2);
2384 <        checkCompletedNormally(h, null);
2385 <        }
2386 <    }
2387 <    public void testAcceptEither_normalCompletion3() {
2384 >    }}
2385 >
2386 >    /**
2387 >     * acceptEither result completes normally after normal completion
2388 >     * of either source
2389 >     */
2390 >    public void testAcceptEither_normalCompletion() {
2391          for (ExecutionMode m : ExecutionMode.values())
2392          for (Integer v1 : new Integer[] { 1, null })
2393 <        for (Integer v2 : new Integer[] { 2, null }) {
2394 <
2393 >        for (Integer v2 : new Integer[] { 2, null })
2394 >    {
2395          final CompletableFuture<Integer> f = new CompletableFuture<>();
2396          final CompletableFuture<Integer> g = new CompletableFuture<>();
2397 <        final IncAction r = new IncAction();
2398 <
2399 <        f.complete(v1);
2400 <        g.complete(v2);
2401 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2397 >        final NoopConsumer[] rs = new NoopConsumer[6];
2398 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2399 >
2400 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2401 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2402 >        checkIncomplete(h0);
2403 >        checkIncomplete(h1);
2404 >        rs[0].assertNotInvoked();
2405 >        rs[1].assertNotInvoked();
2406 >        f.complete(v1);
2407 >        checkCompletedNormally(h0, null);
2408 >        checkCompletedNormally(h1, null);
2409 >        rs[0].assertValue(v1);
2410 >        rs[1].assertValue(v1);
2411 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2412 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2413 >        checkCompletedNormally(h2, null);
2414 >        checkCompletedNormally(h3, null);
2415 >        rs[2].assertValue(v1);
2416 >        rs[3].assertValue(v1);
2417 >        g.complete(v2);
2418 >
2419 >        // unspecified behavior - both source completions available
2420 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2421 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2422 >        checkCompletedNormally(h4, null);
2423 >        checkCompletedNormally(h5, null);
2424 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2425 >                   Objects.equals(v2, rs[4].value));
2426 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2427 >                   Objects.equals(v2, rs[5].value));
2428  
2165        checkCompletedNormally(h, null);
2429          checkCompletedNormally(f, v1);
2430          checkCompletedNormally(g, v2);
2431 <
2432 <        // unspecified behavior
2433 <        assertTrue(Objects.equals(r.value, inc(v1)) ||
2434 <                   Objects.equals(r.value, inc(v2)));
2435 <        }
2436 <    }
2431 >        checkCompletedNormally(h0, null);
2432 >        checkCompletedNormally(h1, null);
2433 >        checkCompletedNormally(h2, null);
2434 >        checkCompletedNormally(h3, null);
2435 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2436 >    }}
2437  
2438      /**
2439       * acceptEither result completes exceptionally after exceptional
2440       * completion of either source
2441       */
2442 <    public void testAcceptEither_exceptionalCompletion1() {
2442 >    public void testAcceptEither_exceptionalCompletion() {
2443          for (ExecutionMode m : ExecutionMode.values())
2444 <        for (Integer v1 : new Integer[] { 1, null }) {
2445 <
2444 >        for (Integer v1 : new Integer[] { 1, null })
2445 >    {
2446          final CompletableFuture<Integer> f = new CompletableFuture<>();
2447          final CompletableFuture<Integer> g = new CompletableFuture<>();
2185        final IncAction r = new IncAction();
2186        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2448          final CFException ex = new CFException();
2449 +        final NoopConsumer[] rs = new NoopConsumer[6];
2450 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2451  
2452 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2453 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2454 +        checkIncomplete(h0);
2455 +        checkIncomplete(h1);
2456 +        rs[0].assertNotInvoked();
2457 +        rs[1].assertNotInvoked();
2458          f.completeExceptionally(ex);
2459 <        checkCompletedWithWrappedCFException(h, ex);
2460 <        g.complete(v1);
2461 <
2462 <        assertEquals(r.invocationCount, 0);
2463 <        checkCompletedNormally(g, v1);
2464 <        checkCompletedWithWrappedCFException(f, ex);
2196 <        checkCompletedWithWrappedCFException(h, ex);
2197 <        }
2198 <    }
2199 <
2200 <    public void testAcceptEither_exceptionalCompletion2() {
2201 <        for (ExecutionMode m : ExecutionMode.values())
2202 <        for (Integer v1 : new Integer[] { 1, null }) {
2203 <
2204 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2205 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2206 <        final IncAction r = new IncAction();
2207 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2208 <        final CFException ex = new CFException();
2459 >        checkCompletedWithWrappedException(h0, ex);
2460 >        checkCompletedWithWrappedException(h1, ex);
2461 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2462 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2463 >        checkCompletedWithWrappedException(h2, ex);
2464 >        checkCompletedWithWrappedException(h3, ex);
2465  
2466 <        g.completeExceptionally(ex);
2211 <        checkCompletedWithWrappedCFException(h, ex);
2212 <        f.complete(v1);
2466 >        g.complete(v1);
2467  
2468 <        assertEquals(r.invocationCount, 0);
2469 <        checkCompletedNormally(f, v1);
2470 <        checkCompletedWithWrappedCFException(g, ex);
2471 <        checkCompletedWithWrappedCFException(h, ex);
2468 >        // unspecified behavior - both source completions available
2469 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2470 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2471 >        try {
2472 >            assertNull(h4.join());
2473 >            rs[4].assertValue(v1);
2474 >        } catch (CompletionException ok) {
2475 >            checkCompletedWithWrappedException(h4, ex);
2476 >            rs[4].assertNotInvoked();
2477          }
2219    }
2220
2221    public void testAcceptEither_exceptionalCompletion3() {
2222        for (ExecutionMode m : ExecutionMode.values())
2223        for (Integer v1 : new Integer[] { 1, null }) {
2224
2225        final CompletableFuture<Integer> f = new CompletableFuture<>();
2226        final CompletableFuture<Integer> g = new CompletableFuture<>();
2227        final IncAction r = new IncAction();
2228        final CFException ex = new CFException();
2229
2230        g.completeExceptionally(ex);
2231        f.complete(v1);
2232        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2233
2234        // unspecified behavior
2235        Integer v;
2478          try {
2479 <            assertEquals(h.join(), null);
2480 <            assertEquals(r.invocationCount, 1);
2239 <            assertEquals(inc(v1), r.value);
2479 >            assertNull(h5.join());
2480 >            rs[5].assertValue(v1);
2481          } catch (CompletionException ok) {
2482 <            checkCompletedWithWrappedCFException(h, ex);
2483 <            assertEquals(r.invocationCount, 0);
2482 >            checkCompletedWithWrappedException(h5, ex);
2483 >            rs[5].assertNotInvoked();
2484          }
2485  
2486 <        checkCompletedWithWrappedCFException(g, ex);
2487 <        checkCompletedNormally(f, v1);
2488 <        }
2489 <    }
2486 >        checkCompletedExceptionally(f, ex);
2487 >        checkCompletedNormally(g, v1);
2488 >        checkCompletedWithWrappedException(h0, ex);
2489 >        checkCompletedWithWrappedException(h1, ex);
2490 >        checkCompletedWithWrappedException(h2, ex);
2491 >        checkCompletedWithWrappedException(h3, ex);
2492 >        checkCompletedWithWrappedException(h4, ex);
2493 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2494 >    }}
2495  
2496 <    public void testAcceptEither_exceptionalCompletion4() {
2496 >    public void testAcceptEither_exceptionalCompletion2() {
2497          for (ExecutionMode m : ExecutionMode.values())
2498 <        for (Integer v1 : new Integer[] { 1, null }) {
2499 <
2498 >        for (boolean fFirst : new boolean[] { true, false })
2499 >        for (Integer v1 : new Integer[] { 1, null })
2500 >    {
2501          final CompletableFuture<Integer> f = new CompletableFuture<>();
2502          final CompletableFuture<Integer> g = new CompletableFuture<>();
2256        final IncAction r = new IncAction();
2503          final CFException ex = new CFException();
2504 +        final NoopConsumer[] rs = new NoopConsumer[6];
2505 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2506  
2507 <        f.completeExceptionally(ex);
2508 <        g.complete(v1);
2509 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2507 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2508 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2509 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2510 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2511 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2512 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2513  
2514 <        // unspecified behavior
2264 <        Integer v;
2514 >        // unspecified behavior - both source completions available
2515          try {
2516 <            assertEquals(h.join(), null);
2517 <            assertEquals(r.invocationCount, 1);
2268 <            assertEquals(inc(v1), r.value);
2516 >            assertEquals(null, h0.join());
2517 >            rs[0].assertValue(v1);
2518          } catch (CompletionException ok) {
2519 <            checkCompletedWithWrappedCFException(h, ex);
2520 <            assertEquals(r.invocationCount, 0);
2519 >            checkCompletedWithWrappedException(h0, ex);
2520 >            rs[0].assertNotInvoked();
2521          }
2522 <
2523 <        checkCompletedWithWrappedCFException(f, ex);
2524 <        checkCompletedNormally(g, v1);
2522 >        try {
2523 >            assertEquals(null, h1.join());
2524 >            rs[1].assertValue(v1);
2525 >        } catch (CompletionException ok) {
2526 >            checkCompletedWithWrappedException(h1, ex);
2527 >            rs[1].assertNotInvoked();
2528          }
2529 <    }
2530 <
2531 <    /**
2532 <     * acceptEither result completes exceptionally if action does
2533 <     */
2534 <    public void testAcceptEither_actionFailed1() {
2535 <        for (ExecutionMode m : ExecutionMode.values())
2536 <        for (Integer v1 : new Integer[] { 1, null })
2537 <        for (Integer v2 : new Integer[] { 2, null }) {
2538 <
2539 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2540 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2541 <        final FailingConsumer r = new FailingConsumer();
2290 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2291 <
2292 <        f.complete(v1);
2293 <        checkCompletedWithWrappedCFException(h);
2294 <        g.complete(v2);
2295 <        checkCompletedNormally(f, v1);
2296 <        checkCompletedNormally(g, v2);
2529 >        try {
2530 >            assertEquals(null, h2.join());
2531 >            rs[2].assertValue(v1);
2532 >        } catch (CompletionException ok) {
2533 >            checkCompletedWithWrappedException(h2, ex);
2534 >            rs[2].assertNotInvoked();
2535 >        }
2536 >        try {
2537 >            assertEquals(null, h3.join());
2538 >            rs[3].assertValue(v1);
2539 >        } catch (CompletionException ok) {
2540 >            checkCompletedWithWrappedException(h3, ex);
2541 >            rs[3].assertNotInvoked();
2542          }
2298    }
2299
2300    public void testAcceptEither_actionFailed2() {
2301        for (ExecutionMode m : ExecutionMode.values())
2302        for (Integer v1 : new Integer[] { 1, null })
2303        for (Integer v2 : new Integer[] { 2, null }) {
2304
2305        final CompletableFuture<Integer> f = new CompletableFuture<>();
2306        final CompletableFuture<Integer> g = new CompletableFuture<>();
2307        final FailingConsumer r = new FailingConsumer();
2308        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2543  
2310        g.complete(v2);
2311        checkCompletedWithWrappedCFException(h);
2312        f.complete(v1);
2544          checkCompletedNormally(f, v1);
2545 <        checkCompletedNormally(g, v2);
2546 <        }
2316 <    }
2545 >        checkCompletedExceptionally(g, ex);
2546 >    }}
2547  
2548      /**
2549       * acceptEither result completes exceptionally if either source cancelled
2550       */
2551 <    public void testAcceptEither_sourceCancelled1() {
2322 <        for (ExecutionMode m : ExecutionMode.values())
2323 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2324 <        for (Integer v1 : new Integer[] { 1, null }) {
2325 <
2326 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2327 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2328 <        final IncAction r = new IncAction();
2329 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2330 <
2331 <        assertTrue(f.cancel(mayInterruptIfRunning));
2332 <        checkCompletedWithWrappedCancellationException(h);
2333 <        g.complete(v1);
2334 <
2335 <        checkCancelled(f);
2336 <        assertEquals(r.invocationCount, 0);
2337 <        checkCompletedNormally(g, v1);
2338 <        checkCompletedWithWrappedCancellationException(h);
2339 <        }
2340 <    }
2341 <
2342 <    public void testAcceptEither_sourceCancelled2() {
2551 >    public void testAcceptEither_sourceCancelled() {
2552          for (ExecutionMode m : ExecutionMode.values())
2553          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2554 <        for (Integer v1 : new Integer[] { 1, null }) {
2555 <
2554 >        for (Integer v1 : new Integer[] { 1, null })
2555 >    {
2556          final CompletableFuture<Integer> f = new CompletableFuture<>();
2557          final CompletableFuture<Integer> g = new CompletableFuture<>();
2558 <        final IncAction r = new IncAction();
2559 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2558 >        final NoopConsumer[] rs = new NoopConsumer[6];
2559 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2560  
2561 <        assertTrue(g.cancel(mayInterruptIfRunning));
2562 <        checkCompletedWithWrappedCancellationException(h);
2563 <        f.complete(v1);
2561 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2562 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2563 >        checkIncomplete(h0);
2564 >        checkIncomplete(h1);
2565 >        rs[0].assertNotInvoked();
2566 >        rs[1].assertNotInvoked();
2567 >        f.cancel(mayInterruptIfRunning);
2568 >        checkCompletedWithWrappedCancellationException(h0);
2569 >        checkCompletedWithWrappedCancellationException(h1);
2570 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2571 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2572 >        checkCompletedWithWrappedCancellationException(h2);
2573 >        checkCompletedWithWrappedCancellationException(h3);
2574  
2575 <        checkCancelled(g);
2357 <        assertEquals(r.invocationCount, 0);
2358 <        checkCompletedNormally(f, v1);
2359 <        checkCompletedWithWrappedCancellationException(h);
2360 <        }
2361 <    }
2362 <
2363 <    public void testAcceptEither_sourceCancelled3() {
2364 <        for (ExecutionMode m : ExecutionMode.values())
2365 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2366 <        for (Integer v1 : new Integer[] { 1, null }) {
2367 <
2368 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2369 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2370 <        final IncAction r = new IncAction();
2371 <
2372 <        assertTrue(g.cancel(mayInterruptIfRunning));
2373 <        f.complete(v1);
2374 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2575 >        g.complete(v1);
2576  
2577 <        // unspecified behavior
2578 <        Integer v;
2577 >        // unspecified behavior - both source completions available
2578 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2579 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2580          try {
2581 <            assertEquals(h.join(), null);
2582 <            assertEquals(r.invocationCount, 1);
2381 <            assertEquals(inc(v1), r.value);
2581 >            assertNull(h4.join());
2582 >            rs[4].assertValue(v1);
2583          } catch (CompletionException ok) {
2584 <            checkCompletedWithWrappedCancellationException(h);
2585 <            assertEquals(r.invocationCount, 0);
2584 >            checkCompletedWithWrappedCancellationException(h4);
2585 >            rs[4].assertNotInvoked();
2586          }
2386
2387        checkCancelled(g);
2388        checkCompletedNormally(f, v1);
2389        }
2390    }
2391
2392    public void testAcceptEither_sourceCancelled4() {
2393        for (ExecutionMode m : ExecutionMode.values())
2394        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2395        for (Integer v1 : new Integer[] { 1, null }) {
2396
2397        final CompletableFuture<Integer> f = new CompletableFuture<>();
2398        final CompletableFuture<Integer> g = new CompletableFuture<>();
2399        final IncAction r = new IncAction();
2400
2401        assertTrue(f.cancel(mayInterruptIfRunning));
2402        g.complete(v1);
2403        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2404
2405        // unspecified behavior
2406        Integer v;
2587          try {
2588 <            assertEquals(h.join(), null);
2589 <            assertEquals(r.invocationCount, 1);
2410 <            assertEquals(inc(v1), r.value);
2588 >            assertNull(h5.join());
2589 >            rs[5].assertValue(v1);
2590          } catch (CompletionException ok) {
2591 <            checkCompletedWithWrappedCancellationException(h);
2592 <            assertEquals(r.invocationCount, 0);
2591 >            checkCompletedWithWrappedCancellationException(h5);
2592 >            rs[5].assertNotInvoked();
2593          }
2594  
2595          checkCancelled(f);
2596          checkCompletedNormally(g, v1);
2597 <        }
2598 <    }
2597 >        checkCompletedWithWrappedCancellationException(h0);
2598 >        checkCompletedWithWrappedCancellationException(h1);
2599 >        checkCompletedWithWrappedCancellationException(h2);
2600 >        checkCompletedWithWrappedCancellationException(h3);
2601 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2602 >    }}
2603  
2604      /**
2605 <     * runAfterEither result completes normally after normal completion
2423 <     * of either source
2605 >     * acceptEither result completes exceptionally if action does
2606       */
2607 <    public void testRunAfterEither_normalCompletion1() {
2607 >    public void testAcceptEither_actionFailed() {
2608          for (ExecutionMode m : ExecutionMode.values())
2609          for (Integer v1 : new Integer[] { 1, null })
2610 <        for (Integer v2 : new Integer[] { 2, null }) {
2611 <
2610 >        for (Integer v2 : new Integer[] { 2, null })
2611 >    {
2612          final CompletableFuture<Integer> f = new CompletableFuture<>();
2613          final CompletableFuture<Integer> g = new CompletableFuture<>();
2614 <        final Noop r = new Noop();
2615 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2614 >        final FailingConsumer[] rs = new FailingConsumer[6];
2615 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2616  
2617 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2618 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2619          f.complete(v1);
2620 <        checkCompletedNormally(h, null);
2621 <        assertEquals(r.invocationCount, 1);
2622 <        g.complete(v2);
2623 <
2624 <        checkCompletedNormally(f, v1);
2625 <        checkCompletedNormally(g, v2);
2626 <        checkCompletedNormally(h, null);
2443 <        assertEquals(r.invocationCount, 1);
2444 <        }
2445 <    }
2620 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2621 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2622 >        checkCompletedWithWrappedCFException(h0);
2623 >        checkCompletedWithWrappedCFException(h1);
2624 >        checkCompletedWithWrappedCFException(h2);
2625 >        checkCompletedWithWrappedCFException(h3);
2626 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2627  
2628 <    public void testRunAfterEither_normalCompletion2() {
2448 <        for (ExecutionMode m : ExecutionMode.values())
2449 <        for (Integer v1 : new Integer[] { 1, null })
2450 <        for (Integer v2 : new Integer[] { 2, null }) {
2628 >        g.complete(v2);
2629  
2630 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2631 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2632 <        final Noop r = new Noop();
2455 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2630 >        // unspecified behavior - both source completions available
2631 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2632 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2633  
2634 <        g.complete(v2);
2635 <        checkCompletedNormally(h, null);
2636 <        assertEquals(r.invocationCount, 1);
2637 <        f.complete(v1);
2634 >        checkCompletedWithWrappedCFException(h4);
2635 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2636 >                   Objects.equals(v2, rs[4].value));
2637 >        checkCompletedWithWrappedCFException(h5);
2638 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2639 >                   Objects.equals(v2, rs[5].value));
2640  
2641          checkCompletedNormally(f, v1);
2642          checkCompletedNormally(g, v2);
2643 <        checkCompletedNormally(h, null);
2644 <        assertEquals(r.invocationCount, 1);
2645 <        }
2646 <    }
2647 <    public void testRunAfterEither_normalCompletion3() {
2643 >    }}
2644 >
2645 >    /**
2646 >     * runAfterEither result completes normally after normal completion
2647 >     * of either source
2648 >     */
2649 >    public void testRunAfterEither_normalCompletion() {
2650          for (ExecutionMode m : ExecutionMode.values())
2651          for (Integer v1 : new Integer[] { 1, null })
2652 <        for (Integer v2 : new Integer[] { 2, null }) {
2653 <
2652 >        for (Integer v2 : new Integer[] { 2, null })
2653 >    {
2654          final CompletableFuture<Integer> f = new CompletableFuture<>();
2655          final CompletableFuture<Integer> g = new CompletableFuture<>();
2656 <        final Noop r = new Noop();
2656 >        final Noop[] rs = new Noop[6];
2657 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2658  
2659 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2660 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2661 +        checkIncomplete(h0);
2662 +        checkIncomplete(h1);
2663 +        rs[0].assertNotInvoked();
2664 +        rs[1].assertNotInvoked();
2665          f.complete(v1);
2666 +        checkCompletedNormally(h0, null);
2667 +        checkCompletedNormally(h1, null);
2668 +        rs[0].assertInvoked();
2669 +        rs[1].assertInvoked();
2670 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2671 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2672 +        checkCompletedNormally(h2, null);
2673 +        checkCompletedNormally(h3, null);
2674 +        rs[2].assertInvoked();
2675 +        rs[3].assertInvoked();
2676 +
2677          g.complete(v2);
2479        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2678  
2679 <        checkCompletedNormally(h, null);
2679 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2680 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2681 >
2682          checkCompletedNormally(f, v1);
2683          checkCompletedNormally(g, v2);
2684 <        assertEquals(r.invocationCount, 1);
2685 <        }
2686 <    }
2684 >        checkCompletedNormally(h0, null);
2685 >        checkCompletedNormally(h1, null);
2686 >        checkCompletedNormally(h2, null);
2687 >        checkCompletedNormally(h3, null);
2688 >        checkCompletedNormally(h4, null);
2689 >        checkCompletedNormally(h5, null);
2690 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2691 >    }}
2692  
2693      /**
2694       * runAfterEither result completes exceptionally after exceptional
2695       * completion of either source
2696       */
2697 <    public void testRunAfterEither_exceptionalCompletion1() {
2697 >    public void testRunAfterEither_exceptionalCompletion() {
2698          for (ExecutionMode m : ExecutionMode.values())
2699 <        for (Integer v1 : new Integer[] { 1, null }) {
2700 <
2699 >        for (Integer v1 : new Integer[] { 1, null })
2700 >    {
2701          final CompletableFuture<Integer> f = new CompletableFuture<>();
2702          final CompletableFuture<Integer> g = new CompletableFuture<>();
2498        final Noop r = new Noop();
2499        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2703          final CFException ex = new CFException();
2704 +        final Noop[] rs = new Noop[6];
2705 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2706  
2707 <        f.completeExceptionally(ex);
2708 <        checkCompletedWithWrappedCFException(h, ex);
2709 <        g.complete(v1);
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 >        assertTrue(f.completeExceptionally(ex));
2714 >        checkCompletedWithWrappedException(h0, ex);
2715 >        checkCompletedWithWrappedException(h1, ex);
2716 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2717 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2718 >        checkCompletedWithWrappedException(h2, ex);
2719 >        checkCompletedWithWrappedException(h3, ex);
2720  
2721 <        assertEquals(r.invocationCount, 0);
2507 <        checkCompletedNormally(g, v1);
2508 <        checkCompletedWithWrappedCFException(f, ex);
2509 <        checkCompletedWithWrappedCFException(h, ex);
2510 <        }
2511 <    }
2721 >        assertTrue(g.complete(v1));
2722  
2723 <    public void testRunAfterEither_exceptionalCompletion2() {
2724 <        for (ExecutionMode m : ExecutionMode.values())
2725 <        for (Integer v1 : new Integer[] { 1, null }) {
2726 <
2727 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2728 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2729 <        final Noop r = new Noop();
2730 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2731 <        final CFException ex = new CFException();
2522 <
2523 <        g.completeExceptionally(ex);
2524 <        checkCompletedWithWrappedCFException(h, ex);
2525 <        f.complete(v1);
2526 <
2527 <        assertEquals(r.invocationCount, 0);
2528 <        checkCompletedNormally(f, v1);
2529 <        checkCompletedWithWrappedCFException(g, ex);
2530 <        checkCompletedWithWrappedCFException(h, ex);
2723 >        // unspecified behavior - both source completions available
2724 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2725 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2726 >        try {
2727 >            assertNull(h4.join());
2728 >            rs[4].assertInvoked();
2729 >        } catch (CompletionException ok) {
2730 >            checkCompletedWithWrappedException(h4, ex);
2731 >            rs[4].assertNotInvoked();
2732          }
2532    }
2533
2534    public void testRunAfterEither_exceptionalCompletion3() {
2535        for (ExecutionMode m : ExecutionMode.values())
2536        for (Integer v1 : new Integer[] { 1, null }) {
2537
2538        final CompletableFuture<Integer> f = new CompletableFuture<>();
2539        final CompletableFuture<Integer> g = new CompletableFuture<>();
2540        final Noop r = new Noop();
2541        final CFException ex = new CFException();
2542
2543        g.completeExceptionally(ex);
2544        f.complete(v1);
2545        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2546
2547        // unspecified behavior
2548        Integer v;
2733          try {
2734 <            assertEquals(h.join(), null);
2735 <            assertEquals(r.invocationCount, 1);
2734 >            assertNull(h5.join());
2735 >            rs[5].assertInvoked();
2736          } catch (CompletionException ok) {
2737 <            checkCompletedWithWrappedCFException(h, ex);
2738 <            assertEquals(r.invocationCount, 0);
2737 >            checkCompletedWithWrappedException(h5, ex);
2738 >            rs[5].assertNotInvoked();
2739          }
2740  
2741 <        checkCompletedWithWrappedCFException(g, ex);
2742 <        checkCompletedNormally(f, v1);
2743 <        }
2744 <    }
2741 >        checkCompletedExceptionally(f, ex);
2742 >        checkCompletedNormally(g, v1);
2743 >        checkCompletedWithWrappedException(h0, ex);
2744 >        checkCompletedWithWrappedException(h1, ex);
2745 >        checkCompletedWithWrappedException(h2, ex);
2746 >        checkCompletedWithWrappedException(h3, ex);
2747 >        checkCompletedWithWrappedException(h4, ex);
2748 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2749 >    }}
2750  
2751 <    public void testRunAfterEither_exceptionalCompletion4() {
2751 >    public void testRunAfterEither_exceptionalCompletion2() {
2752          for (ExecutionMode m : ExecutionMode.values())
2753 <        for (Integer v1 : new Integer[] { 1, null }) {
2754 <
2753 >        for (boolean fFirst : new boolean[] { true, false })
2754 >        for (Integer v1 : new Integer[] { 1, null })
2755 >    {
2756          final CompletableFuture<Integer> f = new CompletableFuture<>();
2757          final CompletableFuture<Integer> g = new CompletableFuture<>();
2568        final Noop r = new Noop();
2758          final CFException ex = new CFException();
2759 +        final Noop[] rs = new Noop[6];
2760 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2761  
2762 <        f.completeExceptionally(ex);
2763 <        g.complete(v1);
2764 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2762 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2763 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2764 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2765 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2766 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2767 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2768  
2769 <        // unspecified behavior
2576 <        Integer v;
2769 >        // unspecified behavior - both source completions available
2770          try {
2771 <            assertEquals(h.join(), null);
2772 <            assertEquals(r.invocationCount, 1);
2771 >            assertEquals(null, h0.join());
2772 >            rs[0].assertInvoked();
2773          } catch (CompletionException ok) {
2774 <            checkCompletedWithWrappedCFException(h, ex);
2775 <            assertEquals(r.invocationCount, 0);
2774 >            checkCompletedWithWrappedException(h0, ex);
2775 >            rs[0].assertNotInvoked();
2776          }
2777 <
2778 <        checkCompletedWithWrappedCFException(f, ex);
2779 <        checkCompletedNormally(g, v1);
2777 >        try {
2778 >            assertEquals(null, h1.join());
2779 >            rs[1].assertInvoked();
2780 >        } catch (CompletionException ok) {
2781 >            checkCompletedWithWrappedException(h1, ex);
2782 >            rs[1].assertNotInvoked();
2783          }
2784 <    }
2785 <
2786 <    /**
2787 <     * runAfterEither result completes exceptionally if action does
2788 <     */
2789 <    public void testRunAfterEither_actionFailed1() {
2790 <        for (ExecutionMode m : ExecutionMode.values())
2791 <        for (Integer v1 : new Integer[] { 1, null })
2792 <        for (Integer v2 : new Integer[] { 2, null }) {
2793 <
2794 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2795 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2796 <        final FailingNoop r = new FailingNoop();
2601 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2602 <
2603 <        f.complete(v1);
2604 <        checkCompletedWithWrappedCFException(h);
2605 <        g.complete(v2);
2606 <        checkCompletedNormally(f, v1);
2607 <        checkCompletedNormally(g, v2);
2784 >        try {
2785 >            assertEquals(null, h2.join());
2786 >            rs[2].assertInvoked();
2787 >        } catch (CompletionException ok) {
2788 >            checkCompletedWithWrappedException(h2, ex);
2789 >            rs[2].assertNotInvoked();
2790 >        }
2791 >        try {
2792 >            assertEquals(null, h3.join());
2793 >            rs[3].assertInvoked();
2794 >        } catch (CompletionException ok) {
2795 >            checkCompletedWithWrappedException(h3, ex);
2796 >            rs[3].assertNotInvoked();
2797          }
2609    }
2610
2611    public void testRunAfterEither_actionFailed2() {
2612        for (ExecutionMode m : ExecutionMode.values())
2613        for (Integer v1 : new Integer[] { 1, null })
2614        for (Integer v2 : new Integer[] { 2, null }) {
2615
2616        final CompletableFuture<Integer> f = new CompletableFuture<>();
2617        final CompletableFuture<Integer> g = new CompletableFuture<>();
2618        final FailingNoop r = new FailingNoop();
2619        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2798  
2621        g.complete(v2);
2622        checkCompletedWithWrappedCFException(h);
2623        f.complete(v1);
2799          checkCompletedNormally(f, v1);
2800 <        checkCompletedNormally(g, v2);
2801 <        }
2627 <    }
2800 >        checkCompletedExceptionally(g, ex);
2801 >    }}
2802  
2803      /**
2804       * runAfterEither result completes exceptionally if either source cancelled
2805       */
2806 <    public void testRunAfterEither_sourceCancelled1() {
2806 >    public void testRunAfterEither_sourceCancelled() {
2807          for (ExecutionMode m : ExecutionMode.values())
2808          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2809 <        for (Integer v1 : new Integer[] { 1, null }) {
2810 <
2809 >        for (Integer v1 : new Integer[] { 1, null })
2810 >    {
2811          final CompletableFuture<Integer> f = new CompletableFuture<>();
2812          final CompletableFuture<Integer> g = new CompletableFuture<>();
2813 <        final Noop r = new Noop();
2814 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2813 >        final Noop[] rs = new Noop[6];
2814 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2815  
2816 <        assertTrue(f.cancel(mayInterruptIfRunning));
2817 <        checkCompletedWithWrappedCancellationException(h);
2818 <        g.complete(v1);
2816 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2817 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2818 >        checkIncomplete(h0);
2819 >        checkIncomplete(h1);
2820 >        rs[0].assertNotInvoked();
2821 >        rs[1].assertNotInvoked();
2822 >        f.cancel(mayInterruptIfRunning);
2823 >        checkCompletedWithWrappedCancellationException(h0);
2824 >        checkCompletedWithWrappedCancellationException(h1);
2825 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2826 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2827 >        checkCompletedWithWrappedCancellationException(h2);
2828 >        checkCompletedWithWrappedCancellationException(h3);
2829  
2830 <        checkCancelled(f);
2647 <        assertEquals(r.invocationCount, 0);
2648 <        checkCompletedNormally(g, v1);
2649 <        checkCompletedWithWrappedCancellationException(h);
2650 <        }
2651 <    }
2652 <
2653 <    public void testRunAfterEither_sourceCancelled2() {
2654 <        for (ExecutionMode m : ExecutionMode.values())
2655 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2656 <        for (Integer v1 : new Integer[] { 1, null }) {
2657 <
2658 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2659 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2660 <        final Noop r = new Noop();
2661 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2662 <
2663 <        assertTrue(g.cancel(mayInterruptIfRunning));
2664 <        checkCompletedWithWrappedCancellationException(h);
2665 <        f.complete(v1);
2830 >        assertTrue(g.complete(v1));
2831  
2832 <        checkCancelled(g);
2833 <        assertEquals(r.invocationCount, 0);
2834 <        checkCompletedNormally(f, v1);
2835 <        checkCompletedWithWrappedCancellationException(h);
2832 >        // unspecified behavior - both source completions available
2833 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2834 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2835 >        try {
2836 >            assertNull(h4.join());
2837 >            rs[4].assertInvoked();
2838 >        } catch (CompletionException ok) {
2839 >            checkCompletedWithWrappedCancellationException(h4);
2840 >            rs[4].assertNotInvoked();
2841          }
2672    }
2673
2674    public void testRunAfterEither_sourceCancelled3() {
2675        for (ExecutionMode m : ExecutionMode.values())
2676        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2677        for (Integer v1 : new Integer[] { 1, null }) {
2678
2679        final CompletableFuture<Integer> f = new CompletableFuture<>();
2680        final CompletableFuture<Integer> g = new CompletableFuture<>();
2681        final Noop r = new Noop();
2682
2683        assertTrue(g.cancel(mayInterruptIfRunning));
2684        f.complete(v1);
2685        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2686
2687        // unspecified behavior
2688        Integer v;
2842          try {
2843 <            assertEquals(h.join(), null);
2844 <            assertEquals(r.invocationCount, 1);
2843 >            assertNull(h5.join());
2844 >            rs[5].assertInvoked();
2845          } catch (CompletionException ok) {
2846 <            checkCompletedWithWrappedCancellationException(h);
2847 <            assertEquals(r.invocationCount, 0);
2846 >            checkCompletedWithWrappedCancellationException(h5);
2847 >            rs[5].assertNotInvoked();
2848          }
2849  
2850 <        checkCancelled(g);
2851 <        checkCompletedNormally(f, v1);
2852 <        }
2853 <    }
2850 >        checkCancelled(f);
2851 >        checkCompletedNormally(g, v1);
2852 >        checkCompletedWithWrappedCancellationException(h0);
2853 >        checkCompletedWithWrappedCancellationException(h1);
2854 >        checkCompletedWithWrappedCancellationException(h2);
2855 >        checkCompletedWithWrappedCancellationException(h3);
2856 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2857 >    }}
2858  
2859 <    public void testRunAfterEither_sourceCancelled4() {
2859 >    /**
2860 >     * runAfterEither result completes exceptionally if action does
2861 >     */
2862 >    public void testRunAfterEither_actionFailed() {
2863          for (ExecutionMode m : ExecutionMode.values())
2864 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2865 <        for (Integer v1 : new Integer[] { 1, null }) {
2866 <
2864 >        for (Integer v1 : new Integer[] { 1, null })
2865 >        for (Integer v2 : new Integer[] { 2, null })
2866 >    {
2867          final CompletableFuture<Integer> f = new CompletableFuture<>();
2868          final CompletableFuture<Integer> g = new CompletableFuture<>();
2869 <        final Noop r = new Noop();
2870 <
2711 <        assertTrue(f.cancel(mayInterruptIfRunning));
2712 <        g.complete(v1);
2713 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2869 >        final FailingRunnable[] rs = new FailingRunnable[6];
2870 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2871  
2872 <        // unspecified behavior
2873 <        Integer v;
2874 <        try {
2875 <            assertEquals(h.join(), null);
2876 <            assertEquals(r.invocationCount, 1);
2877 <        } catch (CompletionException ok) {
2878 <            checkCompletedWithWrappedCancellationException(h);
2879 <            assertEquals(r.invocationCount, 0);
2880 <        }
2872 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2873 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2874 >        assertTrue(f.complete(v1));
2875 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2876 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2877 >        checkCompletedWithWrappedCFException(h0);
2878 >        checkCompletedWithWrappedCFException(h1);
2879 >        checkCompletedWithWrappedCFException(h2);
2880 >        checkCompletedWithWrappedCFException(h3);
2881 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2882 >        assertTrue(g.complete(v2));
2883 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2884 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2885 >        checkCompletedWithWrappedCFException(h4);
2886 >        checkCompletedWithWrappedCFException(h5);
2887  
2888 <        checkCancelled(f);
2889 <        checkCompletedNormally(g, v1);
2890 <        }
2891 <    }
2888 >        checkCompletedNormally(f, v1);
2889 >        checkCompletedNormally(g, v2);
2890 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2891 >    }}
2892  
2893      /**
2894       * thenCompose result completes normally after normal completion of source
2895       */
2896 <    public void testThenCompose() {
2897 <        CompletableFuture<Integer> f, g;
2898 <        CompletableFutureInc r;
2899 <
2900 <        f = new CompletableFuture<>();
2901 <        g = f.thenCompose(r = new CompletableFutureInc());
2902 <        f.complete(one);
2903 <        checkCompletedNormally(g, two);
2904 <        assertTrue(r.ran);
2896 >    public void testThenCompose_normalCompletion() {
2897 >        for (ExecutionMode m : ExecutionMode.values())
2898 >        for (boolean createIncomplete : new boolean[] { true, false })
2899 >        for (Integer v1 : new Integer[] { 1, null })
2900 >    {
2901 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2902 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2903 >        if (!createIncomplete) assertTrue(f.complete(v1));
2904 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2905 >        if (createIncomplete) assertTrue(f.complete(v1));
2906  
2907 <        f = new CompletableFuture<>();
2908 <        f.complete(one);
2909 <        g = f.thenCompose(r = new CompletableFutureInc());
2910 <        checkCompletedNormally(g, two);
2747 <        assertTrue(r.ran);
2748 <    }
2907 >        checkCompletedNormally(g, inc(v1));
2908 >        checkCompletedNormally(f, v1);
2909 >        r.assertValue(v1);
2910 >    }}
2911  
2912      /**
2913       * thenCompose result completes exceptionally after exceptional
2914       * completion of source
2915       */
2916 <    public void testThenCompose2() {
2917 <        CompletableFuture<Integer> f, g;
2918 <        CompletableFutureInc r;
2916 >    public void testThenCompose_exceptionalCompletion() {
2917 >        for (ExecutionMode m : ExecutionMode.values())
2918 >        for (boolean createIncomplete : new boolean[] { true, false })
2919 >    {
2920 >        final CFException ex = new CFException();
2921 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2922 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2923 >        if (!createIncomplete) f.completeExceptionally(ex);
2924 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2925 >        if (createIncomplete) f.completeExceptionally(ex);
2926  
2927 <        f = new CompletableFuture<>();
2928 <        g = f.thenCompose(r = new CompletableFutureInc());
2929 <        f.completeExceptionally(new CFException());
2930 <        checkCompletedWithWrappedCFException(g);
2762 <
2763 <        f = new CompletableFuture<>();
2764 <        f.completeExceptionally(new CFException());
2765 <        g = f.thenCompose(r = new CompletableFutureInc());
2766 <        checkCompletedWithWrappedCFException(g);
2767 <    }
2927 >        checkCompletedWithWrappedException(g, ex);
2928 >        checkCompletedExceptionally(f, ex);
2929 >        r.assertNotInvoked();
2930 >    }}
2931  
2932      /**
2933       * thenCompose result completes exceptionally if action does
2934       */
2935 <    public void testThenCompose3() {
2936 <        CompletableFuture<Integer> f, g;
2937 <        FailingCompletableFutureFunction r;
2938 <
2939 <        f = new CompletableFuture<>();
2940 <        g = f.thenCompose(r = new FailingCompletableFutureFunction());
2941 <        f.complete(one);
2942 <        checkCompletedWithWrappedCFException(g);
2935 >    public void testThenCompose_actionFailed() {
2936 >        for (ExecutionMode m : ExecutionMode.values())
2937 >        for (boolean createIncomplete : new boolean[] { true, false })
2938 >        for (Integer v1 : new Integer[] { 1, null })
2939 >    {
2940 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2941 >        final FailingCompletableFutureFunction r
2942 >            = new FailingCompletableFutureFunction(m);
2943 >        if (!createIncomplete) assertTrue(f.complete(v1));
2944 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2945 >        if (createIncomplete) assertTrue(f.complete(v1));
2946  
2781        f = new CompletableFuture<>();
2782        f.complete(one);
2783        g = f.thenCompose(r = new FailingCompletableFutureFunction());
2947          checkCompletedWithWrappedCFException(g);
2948 <    }
2948 >        checkCompletedNormally(f, v1);
2949 >    }}
2950  
2951      /**
2952       * thenCompose result completes exceptionally if source cancelled
2953       */
2954 <    public void testThenCompose4() {
2955 <        CompletableFuture<Integer> f, g;
2956 <        CompletableFutureInc r;
2957 <
2958 <        f = new CompletableFuture<>();
2959 <        g = f.thenCompose(r = new CompletableFutureInc());
2960 <        assertTrue(f.cancel(true));
2961 <        checkCompletedWithWrappedCancellationException(g);
2962 <
2963 <        f = new CompletableFuture<>();
2964 <        assertTrue(f.cancel(true));
2965 <        g = f.thenCompose(r = new CompletableFutureInc());
2966 <        checkCompletedWithWrappedCancellationException(g);
2803 <    }
2804 <
2805 <    // asyncs
2806 <
2807 <    /**
2808 <     * thenRunAsync result completes normally after normal completion of source
2809 <     */
2810 <    public void testThenRunAsync() {
2811 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2812 <        Noop r = new Noop();
2813 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2814 <        f.complete(null);
2815 <        checkCompletedNormally(g, null);
2816 <
2817 <        // reordered version
2818 <        f = new CompletableFuture<>();
2819 <        f.complete(null);
2820 <        r = new Noop();
2821 <        g = f.thenRunAsync(r);
2822 <        checkCompletedNormally(g, null);
2823 <    }
2824 <
2825 <    /**
2826 <     * thenRunAsync result completes exceptionally after exceptional
2827 <     * completion of source
2828 <     */
2829 <    public void testThenRunAsync2() {
2830 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2831 <        Noop r = new Noop();
2832 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2833 <        f.completeExceptionally(new CFException());
2834 <        try {
2835 <            g.join();
2836 <            shouldThrow();
2837 <        } catch (CompletionException success) {}
2838 <        checkCompletedWithWrappedCFException(g);
2839 <    }
2840 <
2841 <    /**
2842 <     * thenRunAsync result completes exceptionally if action does
2843 <     */
2844 <    public void testThenRunAsync3() {
2845 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2846 <        FailingNoop r = new FailingNoop();
2847 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2848 <        f.complete(null);
2849 <        checkCompletedWithWrappedCFException(g);
2850 <    }
2851 <
2852 <    /**
2853 <     * thenRunAsync result completes exceptionally if source cancelled
2854 <     */
2855 <    public void testThenRunAsync4() {
2856 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2857 <        Noop r = new Noop();
2858 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2859 <        assertTrue(f.cancel(true));
2860 <        checkCompletedWithWrappedCancellationException(g);
2861 <    }
2862 <
2863 <    /**
2864 <     * thenApplyAsync result completes normally after normal completion of source
2865 <     */
2866 <    public void testThenApplyAsync() {
2867 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2868 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2869 <        f.complete(one);
2870 <        checkCompletedNormally(g, two);
2871 <    }
2872 <
2873 <    /**
2874 <     * thenApplyAsync result completes exceptionally after exceptional
2875 <     * completion of source
2876 <     */
2877 <    public void testThenApplyAsync2() {
2878 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2879 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2880 <        f.completeExceptionally(new CFException());
2881 <        checkCompletedWithWrappedCFException(g);
2882 <    }
2883 <
2884 <    /**
2885 <     * thenApplyAsync result completes exceptionally if action does
2886 <     */
2887 <    public void testThenApplyAsync3() {
2888 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2889 <        FailingFunction r = new FailingFunction();
2890 <        CompletableFuture<Integer> g = f.thenApplyAsync(r);
2891 <        f.complete(null);
2892 <        checkCompletedWithWrappedCFException(g);
2893 <    }
2894 <
2895 <    /**
2896 <     * thenApplyAsync result completes exceptionally if source cancelled
2897 <     */
2898 <    public void testThenApplyAsync4() {
2899 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2900 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2901 <        assertTrue(f.cancel(true));
2902 <        checkCompletedWithWrappedCancellationException(g);
2903 <    }
2904 <
2905 <    /**
2906 <     * thenAcceptAsync result completes normally after normal
2907 <     * completion of source
2908 <     */
2909 <    public void testThenAcceptAsync() {
2910 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2911 <        IncAction r = new IncAction();
2912 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2913 <        f.complete(one);
2914 <        checkCompletedNormally(g, null);
2915 <        assertEquals(r.value, (Integer) 2);
2916 <    }
2917 <
2918 <    /**
2919 <     * thenAcceptAsync result completes exceptionally after exceptional
2920 <     * completion of source
2921 <     */
2922 <    public void testThenAcceptAsync2() {
2923 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2924 <        IncAction r = new IncAction();
2925 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2926 <        f.completeExceptionally(new CFException());
2927 <        checkCompletedWithWrappedCFException(g);
2928 <    }
2929 <
2930 <    /**
2931 <     * thenAcceptAsync result completes exceptionally if action does
2932 <     */
2933 <    public void testThenAcceptAsync3() {
2934 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2935 <        FailingConsumer r = new FailingConsumer();
2936 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2937 <        f.complete(null);
2938 <        checkCompletedWithWrappedCFException(g);
2939 <    }
2940 <
2941 <    /**
2942 <     * thenAcceptAsync result completes exceptionally if source cancelled
2943 <     */
2944 <    public void testThenAcceptAsync4() {
2945 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2946 <        IncAction r = new IncAction();
2947 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2948 <        assertTrue(f.cancel(true));
2949 <        checkCompletedWithWrappedCancellationException(g);
2950 <    }
2951 <
2952 <    /**
2953 <     * thenComposeAsync result completes normally after normal
2954 <     * completion of source
2955 <     */
2956 <    public void testThenComposeAsync() {
2957 <        CompletableFuture<Integer> f, g;
2958 <        CompletableFutureInc r;
2959 <
2960 <        f = new CompletableFuture<>();
2961 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2962 <        f.complete(one);
2963 <        checkCompletedNormally(g, two);
2964 <
2965 <        f = new CompletableFuture<>();
2966 <        f.complete(one);
2967 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2968 <        checkCompletedNormally(g, two);
2969 <    }
2970 <
2971 <    /**
2972 <     * thenComposeAsync result completes exceptionally after
2973 <     * exceptional completion of source
2974 <     */
2975 <    public void testThenComposeAsync2() {
2976 <        CompletableFuture<Integer> f, g;
2977 <        CompletableFutureInc r;
2978 <
2979 <        f = new CompletableFuture<>();
2980 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2981 <        f.completeExceptionally(new CFException());
2982 <        checkCompletedWithWrappedCFException(g);
2983 <        assertFalse(r.ran);
2984 <
2985 <        f = new CompletableFuture<>();
2986 <        f.completeExceptionally(new CFException());
2987 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2988 <        checkCompletedWithWrappedCFException(g);
2989 <        assertFalse(r.ran);
2990 <    }
2991 <
2992 <    /**
2993 <     * thenComposeAsync result completes exceptionally if action does
2994 <     */
2995 <    public void testThenComposeAsync3() {
2996 <        CompletableFuture<Integer> f, g;
2997 <        FailingCompletableFutureFunction r;
2998 <
2999 <        f = new CompletableFuture<>();
3000 <        g = f.thenComposeAsync(r = new FailingCompletableFutureFunction());
3001 <        f.complete(one);
3002 <        checkCompletedWithWrappedCFException(g);
3003 <
3004 <        f = new CompletableFuture<>();
3005 <        f.complete(one);
3006 <        g = f.thenComposeAsync(r = new FailingCompletableFutureFunction());
3007 <        checkCompletedWithWrappedCFException(g);
3008 <    }
3009 <
3010 <    /**
3011 <     * thenComposeAsync result completes exceptionally if source cancelled
3012 <     */
3013 <    public void testThenComposeAsync4() {
3014 <        CompletableFuture<Integer> f, g;
3015 <        CompletableFutureInc r;
3016 <
3017 <        f = new CompletableFuture<>();
3018 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
3019 <        assertTrue(f.cancel(true));
3020 <        checkCompletedWithWrappedCancellationException(g);
3021 <
3022 <        f = new CompletableFuture<>();
3023 <        assertTrue(f.cancel(true));
3024 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
3025 <        checkCompletedWithWrappedCancellationException(g);
3026 <    }
3027 <
3028 <    // async with explicit executors
3029 <
3030 <    /**
3031 <     * thenRunAsync result completes normally after normal completion of source
3032 <     */
3033 <    public void testThenRunAsyncE() {
3034 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3035 <        Noop r = new Noop();
3036 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3037 <        f.complete(null);
3038 <        checkCompletedNormally(g, null);
3039 <
3040 <        // reordered version
3041 <        f = new CompletableFuture<>();
3042 <        f.complete(null);
3043 <        r = new Noop();
3044 <        g = f.thenRunAsync(r, new ThreadExecutor());
3045 <        checkCompletedNormally(g, null);
3046 <    }
3047 <
3048 <    /**
3049 <     * thenRunAsync result completes exceptionally after exceptional
3050 <     * completion of source
3051 <     */
3052 <    public void testThenRunAsync2E() {
3053 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3054 <        Noop r = new Noop();
3055 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3056 <        f.completeExceptionally(new CFException());
3057 <        try {
3058 <            g.join();
3059 <            shouldThrow();
3060 <        } catch (CompletionException success) {}
3061 <        checkCompletedWithWrappedCFException(g);
3062 <    }
3063 <
3064 <    /**
3065 <     * thenRunAsync result completes exceptionally if action does
3066 <     */
3067 <    public void testThenRunAsync3E() {
3068 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3069 <        FailingNoop r = new FailingNoop();
3070 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3071 <        f.complete(null);
3072 <        checkCompletedWithWrappedCFException(g);
3073 <    }
3074 <
3075 <    /**
3076 <     * thenRunAsync result completes exceptionally if source cancelled
3077 <     */
3078 <    public void testThenRunAsync4E() {
3079 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3080 <        Noop r = new Noop();
3081 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3082 <        assertTrue(f.cancel(true));
3083 <        checkCompletedWithWrappedCancellationException(g);
3084 <    }
3085 <
3086 <    /**
3087 <     * thenApplyAsync result completes normally after normal completion of source
3088 <     */
3089 <    public void testThenApplyAsyncE() {
3090 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3091 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3092 <        f.complete(one);
3093 <        checkCompletedNormally(g, two);
3094 <    }
3095 <
3096 <    /**
3097 <     * thenApplyAsync result completes exceptionally after exceptional
3098 <     * completion of source
3099 <     */
3100 <    public void testThenApplyAsync2E() {
3101 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3102 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3103 <        f.completeExceptionally(new CFException());
3104 <        checkCompletedWithWrappedCFException(g);
3105 <    }
3106 <
3107 <    /**
3108 <     * thenApplyAsync result completes exceptionally if action does
3109 <     */
3110 <    public void testThenApplyAsync3E() {
3111 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3112 <        FailingFunction r = new FailingFunction();
3113 <        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
3114 <        f.complete(null);
3115 <        checkCompletedWithWrappedCFException(g);
3116 <    }
3117 <
3118 <    /**
3119 <     * thenApplyAsync result completes exceptionally if source cancelled
3120 <     */
3121 <    public void testThenApplyAsync4E() {
3122 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3123 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3124 <        assertTrue(f.cancel(true));
3125 <        checkCompletedWithWrappedCancellationException(g);
3126 <    }
3127 <
3128 <    /**
3129 <     * thenAcceptAsync result completes normally after normal
3130 <     * completion of source
3131 <     */
3132 <    public void testThenAcceptAsyncE() {
3133 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3134 <        IncAction r = new IncAction();
3135 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3136 <        f.complete(one);
3137 <        checkCompletedNormally(g, null);
3138 <        assertEquals(r.value, (Integer) 2);
3139 <    }
3140 <
3141 <    /**
3142 <     * thenAcceptAsync result completes exceptionally after exceptional
3143 <     * completion of source
3144 <     */
3145 <    public void testThenAcceptAsync2E() {
3146 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3147 <        IncAction r = new IncAction();
3148 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3149 <        f.completeExceptionally(new CFException());
3150 <        checkCompletedWithWrappedCFException(g);
3151 <    }
3152 <
3153 <    /**
3154 <     * thenAcceptAsync result completes exceptionally if action does
3155 <     */
3156 <    public void testThenAcceptAsync3E() {
3157 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3158 <        FailingConsumer r = new FailingConsumer();
3159 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3160 <        f.complete(null);
3161 <        checkCompletedWithWrappedCFException(g);
3162 <    }
2954 >    public void testThenCompose_sourceCancelled() {
2955 >        for (ExecutionMode m : ExecutionMode.values())
2956 >        for (boolean createIncomplete : new boolean[] { true, false })
2957 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2958 >    {
2959 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2960 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2961 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2962 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2963 >        if (createIncomplete) {
2964 >            checkIncomplete(g);
2965 >            assertTrue(f.cancel(mayInterruptIfRunning));
2966 >        }
2967  
3164    /**
3165     * thenAcceptAsync result completes exceptionally if source cancelled
3166     */
3167    public void testThenAcceptAsync4E() {
3168        CompletableFuture<Integer> f = new CompletableFuture<>();
3169        IncAction r = new IncAction();
3170        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3171        assertTrue(f.cancel(true));
2968          checkCompletedWithWrappedCancellationException(g);
2969 <    }
2970 <
3175 <    /**
3176 <     * thenComposeAsync result completes normally after normal
3177 <     * completion of source
3178 <     */
3179 <    public void testThenComposeAsyncE() {
3180 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3181 <        CompletableFutureInc r = new CompletableFutureInc();
3182 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3183 <        f.complete(one);
3184 <        checkCompletedNormally(g, two);
3185 <    }
3186 <
3187 <    /**
3188 <     * thenComposeAsync result completes exceptionally after
3189 <     * exceptional completion of source
3190 <     */
3191 <    public void testThenComposeAsync2E() {
3192 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3193 <        CompletableFutureInc r = new CompletableFutureInc();
3194 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3195 <        f.completeExceptionally(new CFException());
3196 <        checkCompletedWithWrappedCFException(g);
3197 <    }
2969 >        checkCancelled(f);
2970 >    }}
2971  
2972      /**
2973 <     * thenComposeAsync result completes exceptionally if action does
2973 >     * thenCompose result completes exceptionally if the result of the action does
2974       */
2975 <    public void testThenComposeAsync3E() {
2976 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2977 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
2978 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
2979 <        f.complete(one);
2980 <        checkCompletedWithWrappedCFException(g);
2981 <    }
2975 >    public void testThenCompose_actionReturnsFailingFuture() {
2976 >        for (ExecutionMode m : ExecutionMode.values())
2977 >        for (int order = 0; order < 6; order++)
2978 >        for (Integer v1 : new Integer[] { 1, null })
2979 >    {
2980 >        final CFException ex = new CFException();
2981 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2982 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2983 >        final CompletableFuture<Integer> h;
2984 >        // Test all permutations of orders
2985 >        switch (order) {
2986 >        case 0:
2987 >            assertTrue(f.complete(v1));
2988 >            assertTrue(g.completeExceptionally(ex));
2989 >            h = m.thenCompose(f, (x -> g));
2990 >            break;
2991 >        case 1:
2992 >            assertTrue(f.complete(v1));
2993 >            h = m.thenCompose(f, (x -> g));
2994 >            assertTrue(g.completeExceptionally(ex));
2995 >            break;
2996 >        case 2:
2997 >            assertTrue(g.completeExceptionally(ex));
2998 >            assertTrue(f.complete(v1));
2999 >            h = m.thenCompose(f, (x -> g));
3000 >            break;
3001 >        case 3:
3002 >            assertTrue(g.completeExceptionally(ex));
3003 >            h = m.thenCompose(f, (x -> g));
3004 >            assertTrue(f.complete(v1));
3005 >            break;
3006 >        case 4:
3007 >            h = m.thenCompose(f, (x -> g));
3008 >            assertTrue(f.complete(v1));
3009 >            assertTrue(g.completeExceptionally(ex));
3010 >            break;
3011 >        case 5:
3012 >            h = m.thenCompose(f, (x -> g));
3013 >            assertTrue(f.complete(v1));
3014 >            assertTrue(g.completeExceptionally(ex));
3015 >            break;
3016 >        default: throw new AssertionError();
3017 >        }
3018  
3019 <    /**
3020 <     * thenComposeAsync result completes exceptionally if source cancelled
3021 <     */
3022 <    public void testThenComposeAsync4E() {
3214 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3215 <        CompletableFutureInc r = new CompletableFutureInc();
3216 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3217 <        assertTrue(f.cancel(true));
3218 <        checkCompletedWithWrappedCancellationException(g);
3219 <    }
3019 >        checkCompletedExceptionally(g, ex);
3020 >        checkCompletedWithWrappedException(h, ex);
3021 >        checkCompletedNormally(f, v1);
3022 >    }}
3023  
3024      // other static methods
3025  
# Line 3234 | Line 3037 | public class CompletableFutureTest exten
3037       * when all components complete normally
3038       */
3039      public void testAllOf_normal() throws Exception {
3040 <        for (int k = 1; k < 20; ++k) {
3041 <            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3042 <            for (int i = 0; i < k; ++i)
3040 >        for (int k = 1; k < 10; k++) {
3041 >            CompletableFuture<Integer>[] fs
3042 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3043 >            for (int i = 0; i < k; i++)
3044 >                fs[i] = new CompletableFuture<>();
3045 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3046 >            for (int i = 0; i < k; i++) {
3047 >                checkIncomplete(f);
3048 >                checkIncomplete(CompletableFuture.allOf(fs));
3049 >                fs[i].complete(one);
3050 >            }
3051 >            checkCompletedNormally(f, null);
3052 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3053 >        }
3054 >    }
3055 >
3056 >    public void testAllOf_backwards() throws Exception {
3057 >        for (int k = 1; k < 10; k++) {
3058 >            CompletableFuture<Integer>[] fs
3059 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3060 >            for (int i = 0; i < k; i++)
3061                  fs[i] = new CompletableFuture<>();
3062              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3063 <            for (int i = 0; i < k; ++i) {
3063 >            for (int i = k - 1; i >= 0; i--) {
3064                  checkIncomplete(f);
3065                  checkIncomplete(CompletableFuture.allOf(fs));
3066                  fs[i].complete(one);
# Line 3249 | Line 3070 | public class CompletableFutureTest exten
3070          }
3071      }
3072  
3073 +    public void testAllOf_exceptional() throws Exception {
3074 +        for (int k = 1; k < 10; k++) {
3075 +            CompletableFuture<Integer>[] fs
3076 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3077 +            CFException ex = new CFException();
3078 +            for (int i = 0; i < k; i++)
3079 +                fs[i] = new CompletableFuture<>();
3080 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3081 +            for (int i = 0; i < k; i++) {
3082 +                checkIncomplete(f);
3083 +                checkIncomplete(CompletableFuture.allOf(fs));
3084 +                if (i != k / 2) {
3085 +                    fs[i].complete(i);
3086 +                    checkCompletedNormally(fs[i], i);
3087 +                } else {
3088 +                    fs[i].completeExceptionally(ex);
3089 +                    checkCompletedExceptionally(fs[i], ex);
3090 +                }
3091 +            }
3092 +            checkCompletedWithWrappedException(f, ex);
3093 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3094 +        }
3095 +    }
3096 +
3097      /**
3098       * anyOf(no component futures) returns an incomplete future
3099       */
3100      public void testAnyOf_empty() throws Exception {
3101 +        for (Integer v1 : new Integer[] { 1, null })
3102 +    {
3103          CompletableFuture<Object> f = CompletableFuture.anyOf();
3104          checkIncomplete(f);
3105 <    }
3105 >
3106 >        f.complete(v1);
3107 >        checkCompletedNormally(f, v1);
3108 >    }}
3109  
3110      /**
3111       * anyOf returns a future completed normally with a value when
3112       * a component future does
3113       */
3114      public void testAnyOf_normal() throws Exception {
3115 <        for (int k = 0; k < 10; ++k) {
3115 >        for (int k = 0; k < 10; k++) {
3116              CompletableFuture[] fs = new CompletableFuture[k];
3117 <            for (int i = 0; i < k; ++i)
3117 >            for (int i = 0; i < k; i++)
3118                  fs[i] = new CompletableFuture<>();
3119              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3120              checkIncomplete(f);
3121 <            for (int i = 0; i < k; ++i) {
3122 <                fs[i].complete(one);
3123 <                checkCompletedNormally(f, one);
3124 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3121 >            for (int i = 0; i < k; i++) {
3122 >                fs[i].complete(i);
3123 >                checkCompletedNormally(f, 0);
3124 >                int x = (int) CompletableFuture.anyOf(fs).join();
3125 >                assertTrue(0 <= x && x <= i);
3126 >            }
3127 >        }
3128 >    }
3129 >    public void testAnyOf_normal_backwards() throws Exception {
3130 >        for (int k = 0; k < 10; k++) {
3131 >            CompletableFuture[] fs = new CompletableFuture[k];
3132 >            for (int i = 0; i < k; i++)
3133 >                fs[i] = new CompletableFuture<>();
3134 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3135 >            checkIncomplete(f);
3136 >            for (int i = k - 1; i >= 0; i--) {
3137 >                fs[i].complete(i);
3138 >                checkCompletedNormally(f, k - 1);
3139 >                int x = (int) CompletableFuture.anyOf(fs).join();
3140 >                assertTrue(i <= x && x <= k - 1);
3141              }
3142          }
3143      }
# Line 3280 | Line 3146 | public class CompletableFutureTest exten
3146       * anyOf result completes exceptionally when any component does.
3147       */
3148      public void testAnyOf_exceptional() throws Exception {
3149 <        for (int k = 0; k < 10; ++k) {
3149 >        for (int k = 0; k < 10; k++) {
3150 >            CompletableFuture[] fs = new CompletableFuture[k];
3151 >            CFException[] exs = new CFException[k];
3152 >            for (int i = 0; i < k; i++) {
3153 >                fs[i] = new CompletableFuture<>();
3154 >                exs[i] = new CFException();
3155 >            }
3156 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3157 >            checkIncomplete(f);
3158 >            for (int i = 0; i < k; i++) {
3159 >                fs[i].completeExceptionally(exs[i]);
3160 >                checkCompletedWithWrappedException(f, exs[0]);
3161 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3162 >            }
3163 >        }
3164 >    }
3165 >
3166 >    public void testAnyOf_exceptional_backwards() throws Exception {
3167 >        for (int k = 0; k < 10; k++) {
3168              CompletableFuture[] fs = new CompletableFuture[k];
3169 <            for (int i = 0; i < k; ++i)
3169 >            CFException[] exs = new CFException[k];
3170 >            for (int i = 0; i < k; i++) {
3171                  fs[i] = new CompletableFuture<>();
3172 +                exs[i] = new CFException();
3173 +            }
3174              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3175              checkIncomplete(f);
3176 <            for (int i = 0; i < k; ++i) {
3177 <                fs[i].completeExceptionally(new CFException());
3178 <                checkCompletedWithWrappedCFException(f);
3176 >            for (int i = k - 1; i >= 0; i--) {
3177 >                fs[i].completeExceptionally(exs[i]);
3178 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3179                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3180              }
3181          }
# Line 3301 | Line 3188 | public class CompletableFutureTest exten
3188          CompletableFuture<Integer> f = new CompletableFuture<>();
3189          CompletableFuture<Integer> g = new CompletableFuture<>();
3190          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3304        CompletableFuture<?> h;
3191          ThreadExecutor exec = new ThreadExecutor();
3192  
3193          Runnable[] throwingActions = {
3194              () -> CompletableFuture.supplyAsync(null),
3195              () -> CompletableFuture.supplyAsync(null, exec),
3196 <            () -> CompletableFuture.supplyAsync(supplyOne, null),
3196 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3197  
3198              () -> CompletableFuture.runAsync(null),
3199              () -> CompletableFuture.runAsync(null, exec),
# Line 3380 | Line 3266 | public class CompletableFutureTest exten
3266  
3267              () -> f.thenCompose(null),
3268              () -> f.thenComposeAsync(null),
3269 <            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
3269 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3270              () -> f.thenComposeAsync(null, exec),
3271  
3272              () -> f.exceptionally(null),
# Line 3398 | Line 3284 | public class CompletableFutureTest exten
3284              () -> CompletableFuture.anyOf(null, f),
3285  
3286              () -> f.obtrudeException(null),
3287 +
3288 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3289 +            () -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3290 +            () -> CompletableFuture.delayedExecutor(1L, null),
3291 +
3292 +            () -> f.orTimeout(1L, null),
3293 +            () -> f.completeOnTimeout(42, 1L, null),
3294 +
3295 +            () -> CompletableFuture.failedFuture(null),
3296 +            () -> CompletableFuture.failedStage(null),
3297          };
3298  
3299          assertThrows(NullPointerException.class, throwingActions);
# Line 3412 | Line 3308 | public class CompletableFutureTest exten
3308          assertSame(f, f.toCompletableFuture());
3309      }
3310  
3311 +    // jdk9
3312 +
3313      /**
3314 <     * whenComplete action executes on normal completion, propagating
3417 <     * source result.
3314 >     * newIncompleteFuture returns an incomplete CompletableFuture
3315       */
3316 <    public void testWhenComplete_normalCompletion1() {
3317 <        for (ExecutionMode m : ExecutionMode.values())
3318 <        for (Integer v1 : new Integer[] { 1, null }) {
3319 <
3320 <        final AtomicInteger a = new AtomicInteger();
3321 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3322 <        final CompletableFuture<Integer> g =
3426 <            m.whenComplete(f,
3427 <                           (Integer x, Throwable t) -> {
3428 <                               threadAssertSame(x, v1);
3429 <                               threadAssertNull(t);
3430 <                               a.getAndIncrement();
3431 <                           });
3316 >    public void testNewIncompleteFuture() {
3317 >        for (Integer v1 : new Integer[] { 1, null })
3318 >    {
3319 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3320 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3321 >        checkIncomplete(f);
3322 >        checkIncomplete(g);
3323          f.complete(v1);
3324          checkCompletedNormally(f, v1);
3325 +        checkIncomplete(g);
3326 +        g.complete(v1);
3327          checkCompletedNormally(g, v1);
3328 <        assertEquals(a.get(), 1);
3329 <        }
3328 >        assertSame(g.getClass(), CompletableFuture.class);
3329 >    }}
3330 >
3331 >    /**
3332 >     * completedStage returns a completed CompletionStage
3333 >     */
3334 >    public void testCompletedStage() {
3335 >        AtomicInteger x = new AtomicInteger(0);
3336 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3337 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3338 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3339 >        assertEquals(x.get(), 1);
3340 >        assertNull(r.get());
3341      }
3342  
3343      /**
3344 <     * whenComplete action executes on exceptional completion, propagating
3345 <     * source result.
3344 >     * defaultExecutor by default returns the commonPool if
3345 >     * it supports more than one thread.
3346       */
3347 <    public void testWhenComplete_exceptionalCompletion() {
3348 <        for (ExecutionMode m : ExecutionMode.values())
3349 <        for (Integer v1 : new Integer[] { 1, null }) {
3347 >    public void testDefaultExecutor() {
3348 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3349 >        Executor e = f.defaultExecutor();
3350 >        Executor c = ForkJoinPool.commonPool();
3351 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3352 >            assertSame(e, c);
3353 >        else
3354 >            assertNotSame(e, c);
3355 >    }
3356  
3357 <        final AtomicInteger a = new AtomicInteger();
3358 <        final CFException ex = new CFException();
3359 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3360 <        final CompletableFuture<Integer> g = m.whenComplete
3361 <            (f,
3362 <             (Integer x, Throwable t) -> {
3363 <                threadAssertNull(x);
3364 <                threadAssertSame(t, ex);
3365 <                a.getAndIncrement();
3366 <            });
3357 >    /**
3358 >     * failedFuture returns a CompletableFuture completed
3359 >     * exceptionally with the given Exception
3360 >     */
3361 >    public void testFailedFuture() {
3362 >        CFException ex = new CFException();
3363 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3364 >        checkCompletedExceptionally(f, ex);
3365 >    }
3366 >
3367 >    /**
3368 >     * failedFuture(null) throws NPE
3369 >     */
3370 >    public void testFailedFuture_null() {
3371 >        try {
3372 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3373 >            shouldThrow();
3374 >        } catch (NullPointerException success) {}
3375 >    }
3376 >
3377 >    /**
3378 >     * copy returns a CompletableFuture that is completed normally,
3379 >     * with the same value, when source is.
3380 >     */
3381 >    public void testCopy() {
3382 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3383 >        CompletableFuture<Integer> g = f.copy();
3384 >        checkIncomplete(f);
3385 >        checkIncomplete(g);
3386 >        f.complete(1);
3387 >        checkCompletedNormally(f, 1);
3388 >        checkCompletedNormally(g, 1);
3389 >    }
3390 >
3391 >    /**
3392 >     * copy returns a CompletableFuture that is completed exceptionally
3393 >     * when source is.
3394 >     */
3395 >    public void testCopy2() {
3396 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3397 >        CompletableFuture<Integer> g = f.copy();
3398 >        checkIncomplete(f);
3399 >        checkIncomplete(g);
3400 >        CFException ex = new CFException();
3401          f.completeExceptionally(ex);
3402 <        checkCompletedWithWrappedCFException(f, ex);
3403 <        checkCompletedWithWrappedCFException(g, ex);
3460 <        assertEquals(a.get(), 1);
3461 <        }
3402 >        checkCompletedExceptionally(f, ex);
3403 >        checkCompletedWithWrappedException(g, ex);
3404      }
3405  
3406      /**
3407 <     * If a whenComplete action throws an exception when triggered by
3408 <     * a normal completion, it completes exceptionally
3407 >     * minimalCompletionStage returns a CompletableFuture that is
3408 >     * completed normally, with the same value, when source is.
3409       */
3410 <    public void testWhenComplete_actionFailed() {
3411 <        for (ExecutionMode m : ExecutionMode.values())
3412 <        for (Integer v1 : new Integer[] { 1, null }) {
3410 >    public void testMinimalCompletionStage() {
3411 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3412 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3413 >        AtomicInteger x = new AtomicInteger(0);
3414 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3415 >        checkIncomplete(f);
3416 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3417 >        f.complete(1);
3418 >        checkCompletedNormally(f, 1);
3419 >        assertEquals(x.get(), 1);
3420 >        assertNull(r.get());
3421 >    }
3422  
3423 <        final CFException ex = new CFException();
3424 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3425 <        final CompletableFuture<Integer> g = m.whenComplete
3426 <            (f,
3427 <             (Integer x, Throwable t) -> {
3428 <                threadAssertSame(x, v1);
3429 <                threadAssertNull(t);
3430 <                throw ex;
3431 <            });
3432 <        f.complete(v1);
3433 <        checkCompletedNormally(f, v1);
3434 <        checkCompletedWithWrappedCFException(g, ex);
3435 <        }
3423 >    /**
3424 >     * minimalCompletionStage returns a CompletableFuture that is
3425 >     * completed exceptionally when source is.
3426 >     */
3427 >    public void testMinimalCompletionStage2() {
3428 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3429 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3430 >        AtomicInteger x = new AtomicInteger(0);
3431 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3432 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3433 >        checkIncomplete(f);
3434 >        CFException ex = new CFException();
3435 >        f.completeExceptionally(ex);
3436 >        checkCompletedExceptionally(f, ex);
3437 >        assertEquals(x.get(), 0);
3438 >        assertEquals(r.get().getCause(), ex);
3439      }
3440  
3441      /**
3442 <     * If a whenComplete action throws an exception when triggered by
3443 <     * a source completion that also throws an exception, the source
3490 <     * exception takes precedence.
3442 >     * failedStage returns a CompletionStage completed
3443 >     * exceptionally with the given Exception
3444       */
3445 <    public void testWhenComplete_actionFailedSourceFailed() {
3446 <        for (ExecutionMode m : ExecutionMode.values())
3447 <        for (Integer v1 : new Integer[] { 1, null }) {
3445 >    public void testFailedStage() {
3446 >        CFException ex = new CFException();
3447 >        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3448 >        AtomicInteger x = new AtomicInteger(0);
3449 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3450 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3451 >        assertEquals(x.get(), 0);
3452 >        assertEquals(r.get(), ex);
3453 >    }
3454  
3455 <        final CFException ex1 = new CFException();
3456 <        final CFException ex2 = new CFException();
3457 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3458 <        final CompletableFuture<Integer> g = m.whenComplete
3459 <            (f,
3460 <             (Integer x, Throwable t) -> {
3461 <                threadAssertSame(t, ex1);
3462 <                threadAssertNull(x);
3463 <                throw ex2;
3464 <            });
3465 <        f.completeExceptionally(ex1);
3466 <        checkCompletedWithWrappedCFException(f, ex1);
3467 <        checkCompletedWithWrappedCFException(g, ex1);
3468 <        }
3455 >    /**
3456 >     * completeAsync completes with value of given supplier
3457 >     */
3458 >    public void testCompleteAsync() {
3459 >        for (Integer v1 : new Integer[] { 1, null })
3460 >    {
3461 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3462 >        f.completeAsync(() -> v1);
3463 >        f.join();
3464 >        checkCompletedNormally(f, v1);
3465 >    }}
3466 >
3467 >    /**
3468 >     * completeAsync completes exceptionally if given supplier throws
3469 >     */
3470 >    public void testCompleteAsync2() {
3471 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3472 >        CFException ex = new CFException();
3473 >        f.completeAsync(() -> {if (true) throw ex; return 1;});
3474 >        try {
3475 >            f.join();
3476 >            shouldThrow();
3477 >        } catch (CompletionException success) {}
3478 >        checkCompletedWithWrappedException(f, ex);
3479      }
3480  
3481      /**
3482 <     * handleAsync action completes normally with function value on
3514 <     * either normal or exceptional completion of source
3482 >     * completeAsync with given executor completes with value of given supplier
3483       */
3484 <    public void testHandleAsync() {
3485 <        CompletableFuture<Integer> f, g;
3486 <        IntegerHandler r;
3484 >    public void testCompleteAsync3() {
3485 >        for (Integer v1 : new Integer[] { 1, null })
3486 >    {
3487 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3488 >        ThreadExecutor executor = new ThreadExecutor();
3489 >        f.completeAsync(() -> v1, executor);
3490 >        assertSame(v1, f.join());
3491 >        checkCompletedNormally(f, v1);
3492 >        assertEquals(1, executor.count.get());
3493 >    }}
3494  
3495 <        f = new CompletableFuture<>();
3496 <        g = f.handleAsync(r = new IntegerHandler());
3497 <        assertFalse(r.ran);
3498 <        f.completeExceptionally(new CFException());
3499 <        checkCompletedWithWrappedCFException(f);
3500 <        checkCompletedNormally(g, three);
3501 <        assertTrue(r.ran);
3495 >    /**
3496 >     * completeAsync with given executor completes exceptionally if
3497 >     * given supplier throws
3498 >     */
3499 >    public void testCompleteAsync4() {
3500 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3501 >        CFException ex = new CFException();
3502 >        ThreadExecutor executor = new ThreadExecutor();
3503 >        f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3504 >        try {
3505 >            f.join();
3506 >            shouldThrow();
3507 >        } catch (CompletionException success) {}
3508 >        checkCompletedWithWrappedException(f, ex);
3509 >        assertEquals(1, executor.count.get());
3510 >    }
3511  
3512 <        f = new CompletableFuture<>();
3513 <        g = f.handleAsync(r = new IntegerHandler());
3514 <        assertFalse(r.ran);
3515 <        f.completeExceptionally(new CFException());
3516 <        checkCompletedWithWrappedCFException(f);
3517 <        checkCompletedNormally(g, three);
3518 <        assertTrue(r.ran);
3512 >    /**
3513 >     * orTimeout completes with TimeoutException if not complete
3514 >     */
3515 >    public void testOrTimeout_timesOut() {
3516 >        long timeoutMillis = timeoutMillis();
3517 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3518 >        long startTime = System.nanoTime();
3519 >        f.orTimeout(timeoutMillis, MILLISECONDS);
3520 >        checkCompletedWithTimeoutException(f);
3521 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3522 >    }
3523  
3524 <        f = new CompletableFuture<>();
3525 <        g = f.handleAsync(r = new IntegerHandler());
3526 <        assertFalse(r.ran);
3527 <        f.complete(one);
3528 <        checkCompletedNormally(f, one);
3529 <        checkCompletedNormally(g, two);
3530 <        assertTrue(r.ran);
3524 >    /**
3525 >     * orTimeout completes normally if completed before timeout
3526 >     */
3527 >    public void testOrTimeout_completed() {
3528 >        for (Integer v1 : new Integer[] { 1, null })
3529 >    {
3530 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3531 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3532 >        long startTime = System.nanoTime();
3533 >        f.complete(v1);
3534 >        f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3535 >        g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3536 >        g.complete(v1);
3537 >        checkCompletedNormally(f, v1);
3538 >        checkCompletedNormally(g, v1);
3539 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3540 >    }}
3541  
3542 <        f = new CompletableFuture<>();
3543 <        g = f.handleAsync(r = new IntegerHandler());
3544 <        assertFalse(r.ran);
3545 <        f.complete(one);
3546 <        checkCompletedNormally(f, one);
3547 <        checkCompletedNormally(g, two);
3548 <        assertTrue(r.ran);
3542 >    /**
3543 >     * completeOnTimeout completes with given value if not complete
3544 >     */
3545 >    public void testCompleteOnTimeout_timesOut() {
3546 >        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3547 >                       () -> testCompleteOnTimeout_timesOut(null));
3548 >    }
3549 >
3550 >    public void testCompleteOnTimeout_timesOut(Integer v) {
3551 >        long timeoutMillis = timeoutMillis();
3552 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3553 >        long startTime = System.nanoTime();
3554 >        f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3555 >        assertSame(v, f.join());
3556 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3557 >        f.complete(99);         // should have no effect
3558 >        checkCompletedNormally(f, v);
3559      }
3560  
3561      /**
3562 <     * handleAsync action with Executor completes normally with
3555 <     * function value on either normal or exceptional completion of
3556 <     * source
3562 >     * completeOnTimeout has no effect if completed within timeout
3563       */
3564 <    public void testHandleAsync2() {
3565 <        CompletableFuture<Integer> f, g;
3566 <        ThreadExecutor exec = new ThreadExecutor();
3567 <        IntegerHandler r;
3564 >    public void testCompleteOnTimeout_completed() {
3565 >        for (Integer v1 : new Integer[] { 1, null })
3566 >    {
3567 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3568 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3569 >        long startTime = System.nanoTime();
3570 >        f.complete(v1);
3571 >        f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3572 >        g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3573 >        g.complete(v1);
3574 >        checkCompletedNormally(f, v1);
3575 >        checkCompletedNormally(g, v1);
3576 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3577 >    }}
3578  
3579 <        f = new CompletableFuture<>();
3580 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3581 <        assertFalse(r.ran);
3582 <        f.completeExceptionally(new CFException());
3583 <        checkCompletedWithWrappedCFException(f);
3584 <        checkCompletedNormally(g, three);
3585 <        assertTrue(r.ran);
3579 >    /**
3580 >     * delayedExecutor returns an executor that delays submission
3581 >     */
3582 >    public void testDelayedExecutor() {
3583 >        testInParallel(() -> testDelayedExecutor(null, null),
3584 >                       () -> testDelayedExecutor(null, 1),
3585 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3586 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3587 >    }
3588  
3589 <        f = new CompletableFuture<>();
3590 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3591 <        assertFalse(r.ran);
3592 <        f.completeExceptionally(new CFException());
3593 <        checkCompletedWithWrappedCFException(f);
3594 <        checkCompletedNormally(g, three);
3595 <        assertTrue(r.ran);
3589 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3590 >        long timeoutMillis = timeoutMillis();
3591 >        // Use an "unreasonably long" long timeout to catch lingering threads
3592 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3593 >        final Executor delayer, longDelayer;
3594 >        if (executor == null) {
3595 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3596 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3597 >        } else {
3598 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3599 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3600 >        }
3601 >        long startTime = System.nanoTime();
3602 >        CompletableFuture<Integer> f =
3603 >            CompletableFuture.supplyAsync(() -> v, delayer);
3604 >        CompletableFuture<Integer> g =
3605 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3606  
3607 <        f = new CompletableFuture<>();
3580 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3581 <        assertFalse(r.ran);
3582 <        f.complete(one);
3583 <        checkCompletedNormally(f, one);
3584 <        checkCompletedNormally(g, two);
3585 <        assertTrue(r.ran);
3607 >        assertNull(g.getNow(null));
3608  
3609 <        f = new CompletableFuture<>();
3610 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3611 <        assertFalse(r.ran);
3612 <        f.complete(one);
3613 <        checkCompletedNormally(f, one);
3614 <        checkCompletedNormally(g, two);
3615 <        assertTrue(r.ran);
3609 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3610 >        long millisElapsed = millisElapsedSince(startTime);
3611 >        assertTrue(millisElapsed >= timeoutMillis);
3612 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3613 >
3614 >        checkCompletedNormally(f, v);
3615 >
3616 >        checkIncomplete(g);
3617 >        assertTrue(g.cancel(true));
3618 >    }
3619 >
3620 >    //--- tests of implementation details; not part of official tck ---
3621 >
3622 >    Object resultOf(CompletableFuture<?> f) {
3623 >        try {
3624 >            java.lang.reflect.Field resultField
3625 >                = CompletableFuture.class.getDeclaredField("result");
3626 >            resultField.setAccessible(true);
3627 >            return resultField.get(f);
3628 >        } catch (Throwable t) { throw new AssertionError(t); }
3629      }
3630  
3631 +    public void testExceptionPropagationReusesResultObject() {
3632 +        if (!testImplementationDetails) return;
3633 +        for (ExecutionMode m : ExecutionMode.values())
3634 +    {
3635 +        final CFException ex = new CFException();
3636 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3637 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3638 +
3639 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3640 +            = new ArrayList<>();
3641 +
3642 +        funs.add((y) -> m.thenRun(y, new Noop(m)));
3643 +        funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3644 +        funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3645 +
3646 +        funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3647 +        funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3648 +        funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3649 +
3650 +        funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3651 +        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3652 +        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3653 +
3654 +        funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3655 +
3656 +        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3657 +
3658 +        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3659 +        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3660 +
3661 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3662 +                 fun : funs) {
3663 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3664 +            f.completeExceptionally(ex);
3665 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3666 +            checkCompletedWithWrappedException(src, ex);
3667 +            CompletableFuture<?> dep = fun.apply(src);
3668 +            checkCompletedWithWrappedException(dep, ex);
3669 +            assertSame(resultOf(src), resultOf(dep));
3670 +        }
3671 +
3672 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3673 +                 fun : funs) {
3674 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3675 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3676 +            CompletableFuture<?> dep = fun.apply(src);
3677 +            f.completeExceptionally(ex);
3678 +            checkCompletedWithWrappedException(src, ex);
3679 +            checkCompletedWithWrappedException(dep, ex);
3680 +            assertSame(resultOf(src), resultOf(dep));
3681 +        }
3682 +
3683 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3684 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3685 +                 fun : funs) {
3686 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3687 +            f.cancel(mayInterruptIfRunning);
3688 +            checkCancelled(f);
3689 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3690 +            checkCompletedWithWrappedCancellationException(src);
3691 +            CompletableFuture<?> dep = fun.apply(src);
3692 +            checkCompletedWithWrappedCancellationException(dep);
3693 +            assertSame(resultOf(src), resultOf(dep));
3694 +        }
3695 +
3696 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3697 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3698 +                 fun : funs) {
3699 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3700 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3701 +            CompletableFuture<?> dep = fun.apply(src);
3702 +            f.cancel(mayInterruptIfRunning);
3703 +            checkCancelled(f);
3704 +            checkCompletedWithWrappedCancellationException(src);
3705 +            checkCompletedWithWrappedCancellationException(dep);
3706 +            assertSame(resultOf(src), resultOf(dep));
3707 +        }
3708 +    }}
3709 +
3710 +    /**
3711 +     * Minimal completion stages throw UOE for all non-CompletionStage methods
3712 +     */
3713 +    public void testMinimalCompletionStage_minimality() {
3714 +        if (!testImplementationDetails) return;
3715 +        Function<Method, String> toSignature =
3716 +            (method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3717 +        Predicate<Method> isNotStatic =
3718 +            (method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3719 +        List<Method> minimalMethods =
3720 +            Stream.of(Object.class, CompletionStage.class)
3721 +            .flatMap((klazz) -> Stream.of(klazz.getMethods()))
3722 +            .filter(isNotStatic)
3723 +            .collect(Collectors.toList());
3724 +        // Methods from CompletableFuture permitted NOT to throw UOE
3725 +        String[] signatureWhitelist = {
3726 +            "newIncompleteFuture[]",
3727 +            "defaultExecutor[]",
3728 +            "minimalCompletionStage[]",
3729 +            "copy[]",
3730 +        };
3731 +        Set<String> permittedMethodSignatures =
3732 +            Stream.concat(minimalMethods.stream().map(toSignature),
3733 +                          Stream.of(signatureWhitelist))
3734 +            .collect(Collectors.toSet());
3735 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3736 +            .filter(isNotStatic)
3737 +            .filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3738 +            .collect(Collectors.toList());
3739 +
3740 +        CompletionStage<Integer> minimalStage =
3741 +            new CompletableFuture<Integer>().minimalCompletionStage();
3742 +
3743 +        List<Method> bugs = new ArrayList<>();
3744 +        for (Method method : allMethods) {
3745 +            Class<?>[] parameterTypes = method.getParameterTypes();
3746 +            Object[] args = new Object[parameterTypes.length];
3747 +            // Manufacture boxed primitives for primitive params
3748 +            for (int i = 0; i < args.length; i++) {
3749 +                Class<?> type = parameterTypes[i];
3750 +                if (parameterTypes[i] == boolean.class)
3751 +                    args[i] = false;
3752 +                else if (parameterTypes[i] == int.class)
3753 +                    args[i] = 0;
3754 +                else if (parameterTypes[i] == long.class)
3755 +                    args[i] = 0L;
3756 +            }
3757 +            try {
3758 +                method.invoke(minimalStage, args);
3759 +                bugs.add(method);
3760 +            }
3761 +            catch (java.lang.reflect.InvocationTargetException expected) {
3762 +                if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3763 +                    bugs.add(method);
3764 +                    // expected.getCause().printStackTrace();
3765 +                }
3766 +            }
3767 +            catch (ReflectiveOperationException bad) { throw new Error(bad); }
3768 +        }
3769 +        if (!bugs.isEmpty())
3770 +            throw new Error("Methods did not throw UOE: " + bugs.toString());
3771 +    }
3772 +
3773 +    static class Monad {
3774 +        static class ZeroException extends RuntimeException {
3775 +            public ZeroException() { super("monadic zero"); }
3776 +        }
3777 +        // "return", "unit"
3778 +        static <T> CompletableFuture<T> unit(T value) {
3779 +            return completedFuture(value);
3780 +        }
3781 +        // monadic zero ?
3782 +        static <T> CompletableFuture<T> zero() {
3783 +            return failedFuture(new ZeroException());
3784 +        }
3785 +        // >=>
3786 +        static <T,U,V> Function<T, CompletableFuture<V>> compose
3787 +            (Function<T, CompletableFuture<U>> f,
3788 +             Function<U, CompletableFuture<V>> g) {
3789 +            return (x) -> f.apply(x).thenCompose(g);
3790 +        }
3791 +
3792 +        static void assertZero(CompletableFuture<?> f) {
3793 +            try {
3794 +                f.getNow(null);
3795 +                throw new AssertionFailedError("should throw");
3796 +            } catch (CompletionException success) {
3797 +                assertTrue(success.getCause() instanceof ZeroException);
3798 +            }
3799 +        }
3800 +
3801 +        static <T> void assertFutureEquals(CompletableFuture<T> f,
3802 +                                           CompletableFuture<T> g) {
3803 +            T fval = null, gval = null;
3804 +            Throwable fex = null, gex = null;
3805 +
3806 +            try { fval = f.get(); }
3807 +            catch (ExecutionException ex) { fex = ex.getCause(); }
3808 +            catch (Throwable ex) { fex = ex; }
3809 +
3810 +            try { gval = g.get(); }
3811 +            catch (ExecutionException ex) { gex = ex.getCause(); }
3812 +            catch (Throwable ex) { gex = ex; }
3813 +
3814 +            if (fex != null || gex != null)
3815 +                assertSame(fex.getClass(), gex.getClass());
3816 +            else
3817 +                assertEquals(fval, gval);
3818 +        }
3819 +
3820 +        static class PlusFuture<T> extends CompletableFuture<T> {
3821 +            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
3822 +        }
3823 +
3824 +        // Monadic "plus"
3825 +        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
3826 +                                             CompletableFuture<? extends T> g) {
3827 +            PlusFuture<T> plus = new PlusFuture<T>();
3828 +            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
3829 +                if (ex == null) {
3830 +                    if (plus.complete(result))
3831 +                        if (plus.firstFailure.get() != null)
3832 +                            plus.firstFailure.set(null);
3833 +                }
3834 +                else if (plus.firstFailure.compareAndSet(null, ex)) {
3835 +                    if (plus.isDone())
3836 +                        plus.firstFailure.set(null);
3837 +                }
3838 +                else {
3839 +                    // first failure has precedence
3840 +                    Throwable first = plus.firstFailure.getAndSet(null);
3841 +
3842 +                    // may fail with "Self-suppression not permitted"
3843 +                    try { first.addSuppressed(ex); }
3844 +                    catch (Exception ignored) {}
3845 +
3846 +                    plus.completeExceptionally(first);
3847 +                }
3848 +            };
3849 +            f.whenComplete(action);
3850 +            g.whenComplete(action);
3851 +            return plus;
3852 +        }
3853 +    }
3854 +
3855 +    /**
3856 +     * CompletableFuture is an additive monad - sort of.
3857 +     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
3858 +     */
3859 +    public void testAdditiveMonad() throws Throwable {
3860 +        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3861 +        CompletableFuture<Long> zero = Monad.zero();
3862 +
3863 +        // Some mutually non-commutative functions
3864 +        Function<Long, CompletableFuture<Long>> triple
3865 +            = (x) -> Monad.unit(3 * x);
3866 +        Function<Long, CompletableFuture<Long>> inc
3867 +            = (x) -> Monad.unit(x + 1);
3868 +
3869 +        // unit is a right identity: m >>= unit === m
3870 +        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
3871 +                                 inc.apply(5L));
3872 +        // unit is a left identity: (unit x) >>= f === f x
3873 +        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
3874 +                                 inc.apply(5L));
3875 +
3876 +        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
3877 +        Monad.assertFutureEquals(
3878 +            unit.apply(5L).thenCompose(inc).thenCompose(triple),
3879 +            unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
3880 +
3881 +        // The case for CompletableFuture as an additive monad is weaker...
3882 +
3883 +        // zero is a monadic zero
3884 +        Monad.assertZero(zero);
3885 +
3886 +        // left zero: zero >>= f === zero
3887 +        Monad.assertZero(zero.thenCompose(inc));
3888 +        // right zero: f >>= (\x -> zero) === zero
3889 +        Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
3890 +
3891 +        // f plus zero === f
3892 +        Monad.assertFutureEquals(Monad.unit(5L),
3893 +                                 Monad.plus(Monad.unit(5L), zero));
3894 +        // zero plus f === f
3895 +        Monad.assertFutureEquals(Monad.unit(5L),
3896 +                                 Monad.plus(zero, Monad.unit(5L)));
3897 +        // zero plus zero === zero
3898 +        Monad.assertZero(Monad.plus(zero, zero));
3899 +        {
3900 +            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
3901 +                                                   Monad.unit(8L));
3902 +            // non-determinism
3903 +            assertTrue(f.get() == 5L || f.get() == 8L);
3904 +        }
3905 +
3906 +        CompletableFuture<Long> godot = new CompletableFuture<>();
3907 +        // f plus godot === f (doesn't wait for godot)
3908 +        Monad.assertFutureEquals(Monad.unit(5L),
3909 +                                 Monad.plus(Monad.unit(5L), godot));
3910 +        // godot plus f === f (doesn't wait for godot)
3911 +        Monad.assertFutureEquals(Monad.unit(5L),
3912 +                                 Monad.plus(godot, Monad.unit(5L)));
3913 +    }
3914 +
3915 + //     static <U> U join(CompletionStage<U> stage) {
3916 + //         CompletableFuture<U> f = new CompletableFuture<>();
3917 + //         stage.whenComplete((v, ex) -> {
3918 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3919 + //         });
3920 + //         return f.join();
3921 + //     }
3922 +
3923 + //     static <U> boolean isDone(CompletionStage<U> stage) {
3924 + //         CompletableFuture<U> f = new CompletableFuture<>();
3925 + //         stage.whenComplete((v, ex) -> {
3926 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3927 + //         });
3928 + //         return f.isDone();
3929 + //     }
3930 +
3931 + //     static <U> U join2(CompletionStage<U> stage) {
3932 + //         return stage.toCompletableFuture().copy().join();
3933 + //     }
3934 +
3935 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
3936 + //         return stage.toCompletableFuture().copy().isDone();
3937 + //     }
3938 +
3939   }

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