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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.64 by jsr166, Fri Jun 6 17:08:48 2014 UTC vs.
Revision 1.209 by jsr166, Sun Sep 23 17:02:24 2018 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
10 import java.util.concurrent.Executor;
11 import java.util.concurrent.ExecutorService;
12 import java.util.concurrent.Executors;
25   import java.util.concurrent.CancellationException;
14 import java.util.concurrent.CountDownLatch;
15 import java.util.concurrent.ExecutionException;
16 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27   import java.util.concurrent.CompletionException;
28   import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31   import java.util.concurrent.ForkJoinPool;
32   import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
25 < import static java.util.concurrent.TimeUnit.SECONDS;
26 < import java.util.*;
27 < import java.util.function.Supplier;
28 < import java.util.function.Consumer;
36 > import java.util.concurrent.atomic.AtomicReference;
37   import java.util.function.BiConsumer;
30 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.Test;
45 + import junit.framework.TestSuite;
46  
47   public class CompletableFutureTest extends JSR166TestCase {
48  
49      public static void main(String[] args) {
50 <        junit.textui.TestRunner.run(suite());
50 >        main(suite(), args);
51      }
52      public static Test suite() {
53          return new TestSuite(CompletableFutureTest.class);
# Line 44 | Line 58 | public class CompletableFutureTest exten
58      void checkIncomplete(CompletableFuture<?> f) {
59          assertFalse(f.isDone());
60          assertFalse(f.isCancelled());
61 <        assertTrue(f.toString().contains("[Not completed]"));
61 >        assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
62 >
63 >        Object result = null;
64          try {
65 <            assertNull(f.getNow(null));
65 >            result = f.getNow(null);
66          } catch (Throwable fail) { threadUnexpectedException(fail); }
67 +        assertNull(result);
68 +
69          try {
70 <            f.get(0L, SECONDS);
70 >            f.get(randomExpiredTimeout(), randomTimeUnit());
71              shouldThrow();
72          }
73          catch (TimeoutException success) {}
74          catch (Throwable fail) { threadUnexpectedException(fail); }
75      }
76  
77 <    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
78 <        try {
79 <            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
80 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
81 <        try {
82 <            assertEquals(value, f.join());
83 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
66 <        try {
67 <            assertEquals(value, f.getNow(null));
68 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
77 >    <T> void checkCompletedNormally(CompletableFuture<T> f, T expectedValue) {
78 >        checkTimedGet(f, expectedValue);
79 >
80 >        assertEquals(expectedValue, f.join());
81 >        assertEquals(expectedValue, f.getNow(null));
82 >
83 >        T result = null;
84          try {
85 <            assertEquals(value, f.get());
85 >            result = f.get();
86          } catch (Throwable fail) { threadUnexpectedException(fail); }
87 +        assertEquals(expectedValue, result);
88 +
89          assertTrue(f.isDone());
90          assertFalse(f.isCancelled());
91          assertFalse(f.isCompletedExceptionally());
92 <        assertTrue(f.toString().contains("[Completed normally]"));
92 >        assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]"));
93      }
94  
95 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
96 <        try {
97 <            f.get(LONG_DELAY_MS, MILLISECONDS);
98 <            shouldThrow();
99 <        } catch (ExecutionException success) {
100 <            assertTrue(success.getCause() instanceof CFException);
101 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
102 <        try {
86 <            f.join();
87 <            shouldThrow();
88 <        } catch (CompletionException success) {
89 <            assertTrue(success.getCause() instanceof CFException);
90 <        }
91 <        try {
92 <            f.getNow(null);
93 <            shouldThrow();
94 <        } catch (CompletionException success) {
95 <            assertTrue(success.getCause() instanceof CFException);
96 <        }
97 <        try {
98 <            f.get();
99 <            shouldThrow();
100 <        } catch (ExecutionException success) {
101 <            assertTrue(success.getCause() instanceof CFException);
102 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
103 <        assertTrue(f.isDone());
104 <        assertFalse(f.isCancelled());
105 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
95 >    /**
96 >     * Returns the "raw" internal exceptional completion of f,
97 >     * without any additional wrapping with CompletionException.
98 >     */
99 >    Throwable exceptionalCompletion(CompletableFuture<?> f) {
100 >        // handle (and whenComplete and exceptionally) can distinguish
101 >        // between "direct" and "wrapped" exceptional completion
102 >        return f.handle((u, t) -> t).join();
103      }
104  
105 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
106 <                                              CFException ex) {
105 >    void checkCompletedExceptionally(CompletableFuture<?> f,
106 >                                     boolean wrapped,
107 >                                     Consumer<Throwable> checker) {
108 >        Throwable cause = exceptionalCompletion(f);
109 >        if (wrapped) {
110 >            assertTrue(cause instanceof CompletionException);
111 >            cause = cause.getCause();
112 >        }
113 >        checker.accept(cause);
114 >
115 >        long startTime = System.nanoTime();
116          try {
117              f.get(LONG_DELAY_MS, MILLISECONDS);
118              shouldThrow();
119          } catch (ExecutionException success) {
120 <            assertSame(ex, success.getCause());
120 >            assertSame(cause, success.getCause());
121          } catch (Throwable fail) { threadUnexpectedException(fail); }
122 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
123 +
124          try {
125              f.join();
126              shouldThrow();
127          } catch (CompletionException success) {
128 <            assertSame(ex, success.getCause());
129 <        }
128 >            assertSame(cause, success.getCause());
129 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
130 >
131          try {
132              f.getNow(null);
133              shouldThrow();
134          } catch (CompletionException success) {
135 <            assertSame(ex, success.getCause());
136 <        }
135 >            assertSame(cause, success.getCause());
136 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
137 >
138          try {
139              f.get();
140              shouldThrow();
141          } catch (ExecutionException success) {
142 <            assertSame(ex, success.getCause());
142 >            assertSame(cause, success.getCause());
143          } catch (Throwable fail) { threadUnexpectedException(fail); }
144 <        assertTrue(f.isDone());
144 >
145          assertFalse(f.isCancelled());
146 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
146 >        assertTrue(f.isDone());
147 >        assertTrue(f.isCompletedExceptionally());
148 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
149 >    }
150 >
151 >    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
152 >        checkCompletedExceptionally(f, true,
153 >            t -> assertTrue(t instanceof CFException));
154 >    }
155 >
156 >    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
157 >        checkCompletedExceptionally(f, true,
158 >            t -> assertTrue(t instanceof CancellationException));
159 >    }
160 >
161 >    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
162 >        checkCompletedExceptionally(f, false,
163 >            t -> assertTrue(t instanceof TimeoutException));
164 >    }
165 >
166 >    void checkCompletedWithWrappedException(CompletableFuture<?> f,
167 >                                            Throwable ex) {
168 >        checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
169 >    }
170 >
171 >    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
172 >        checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
173      }
174  
175      void checkCancelled(CompletableFuture<?> f) {
176 +        long startTime = System.nanoTime();
177          try {
178              f.get(LONG_DELAY_MS, MILLISECONDS);
179              shouldThrow();
180          } catch (CancellationException success) {
181          } catch (Throwable fail) { threadUnexpectedException(fail); }
182 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
183 +
184          try {
185              f.join();
186              shouldThrow();
# Line 155 | Line 194 | public class CompletableFutureTest exten
194              shouldThrow();
195          } catch (CancellationException success) {
196          } catch (Throwable fail) { threadUnexpectedException(fail); }
158        assertTrue(f.isDone());
159        assertTrue(f.isCompletedExceptionally());
160        assertTrue(f.isCancelled());
161        assertTrue(f.toString().contains("[Completed exceptionally]"));
162    }
197  
198 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
199 <        try {
166 <            f.get(LONG_DELAY_MS, MILLISECONDS);
167 <            shouldThrow();
168 <        } catch (ExecutionException success) {
169 <            assertTrue(success.getCause() instanceof CancellationException);
170 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
171 <        try {
172 <            f.join();
173 <            shouldThrow();
174 <        } catch (CompletionException success) {
175 <            assertTrue(success.getCause() instanceof CancellationException);
176 <        }
177 <        try {
178 <            f.getNow(null);
179 <            shouldThrow();
180 <        } catch (CompletionException success) {
181 <            assertTrue(success.getCause() instanceof CancellationException);
182 <        }
183 <        try {
184 <            f.get();
185 <            shouldThrow();
186 <        } catch (ExecutionException success) {
187 <            assertTrue(success.getCause() instanceof CancellationException);
188 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
198 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
199 >
200          assertTrue(f.isDone());
190        assertFalse(f.isCancelled());
201          assertTrue(f.isCompletedExceptionally());
202 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
202 >        assertTrue(f.isCancelled());
203 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
204      }
205  
206      /**
# Line 206 | Line 217 | public class CompletableFutureTest exten
217       * isCancelled, join, get, and getNow
218       */
219      public void testComplete() {
220 +        for (Integer v1 : new Integer[] { 1, null })
221 +    {
222          CompletableFuture<Integer> f = new CompletableFuture<>();
223          checkIncomplete(f);
224 <        f.complete(one);
225 <        checkCompletedNormally(f, one);
226 <    }
224 >        assertTrue(f.complete(v1));
225 >        assertFalse(f.complete(v1));
226 >        checkCompletedNormally(f, v1);
227 >    }}
228  
229      /**
230       * completeExceptionally completes exceptionally, as indicated by
# Line 218 | Line 232 | public class CompletableFutureTest exten
232       */
233      public void testCompleteExceptionally() {
234          CompletableFuture<Integer> f = new CompletableFuture<>();
235 +        CFException ex = new CFException();
236          checkIncomplete(f);
237 <        f.completeExceptionally(new CFException());
238 <        checkCompletedWithWrappedCFException(f);
237 >        f.completeExceptionally(ex);
238 >        checkCompletedExceptionally(f, ex);
239      }
240  
241      /**
# Line 228 | Line 243 | public class CompletableFutureTest exten
243       * methods isDone, isCancelled, join, get, and getNow
244       */
245      public void testCancel() {
246 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
247 +    {
248          CompletableFuture<Integer> f = new CompletableFuture<>();
249          checkIncomplete(f);
250 <        assertTrue(f.cancel(true));
250 >        assertTrue(f.cancel(mayInterruptIfRunning));
251 >        assertTrue(f.cancel(mayInterruptIfRunning));
252 >        assertTrue(f.cancel(!mayInterruptIfRunning));
253          checkCancelled(f);
254 <    }
254 >    }}
255  
256      /**
257       * obtrudeValue forces completion with given value
# Line 240 | Line 259 | public class CompletableFutureTest exten
259      public void testObtrudeValue() {
260          CompletableFuture<Integer> f = new CompletableFuture<>();
261          checkIncomplete(f);
262 <        f.complete(one);
262 >        assertTrue(f.complete(one));
263          checkCompletedNormally(f, one);
264          f.obtrudeValue(three);
265          checkCompletedNormally(f, three);
# Line 261 | Line 280 | public class CompletableFutureTest exten
280       * obtrudeException forces completion with given exception
281       */
282      public void testObtrudeException() {
283 <        CompletableFuture<Integer> f = new CompletableFuture<>();
284 <        checkIncomplete(f);
285 <        f.complete(one);
286 <        checkCompletedNormally(f, one);
287 <        f.obtrudeException(new CFException());
288 <        checkCompletedWithWrappedCFException(f);
283 >        for (Integer v1 : new Integer[] { 1, null })
284 >    {
285 >        CFException ex;
286 >        CompletableFuture<Integer> f;
287 >
288 >        f = new CompletableFuture<>();
289 >        assertTrue(f.complete(v1));
290 >        for (int i = 0; i < 2; i++) {
291 >            f.obtrudeException(ex = new CFException());
292 >            checkCompletedExceptionally(f, ex);
293 >        }
294 >
295          f = new CompletableFuture<>();
296 <        f.obtrudeException(new CFException());
297 <        checkCompletedWithWrappedCFException(f);
296 >        for (int i = 0; i < 2; i++) {
297 >            f.obtrudeException(ex = new CFException());
298 >            checkCompletedExceptionally(f, ex);
299 >        }
300 >
301          f = new CompletableFuture<>();
302          f.completeExceptionally(new CFException());
303 <        f.obtrudeValue(four);
304 <        checkCompletedNormally(f, four);
305 <        f.obtrudeException(new CFException());
306 <        checkCompletedWithWrappedCFException(f);
307 <    }
303 >        f.obtrudeValue(v1);
304 >        checkCompletedNormally(f, v1);
305 >        f.obtrudeException(ex = new CFException());
306 >        checkCompletedExceptionally(f, ex);
307 >        f.completeExceptionally(new CFException());
308 >        checkCompletedExceptionally(f, ex);
309 >        assertFalse(f.complete(v1));
310 >        checkCompletedExceptionally(f, ex);
311 >    }}
312  
313      /**
314       * getNumberOfDependents returns number of dependent tasks
315       */
316      public void testGetNumberOfDependents() {
317 +        for (ExecutionMode m : ExecutionMode.values())
318 +        for (Integer v1 : new Integer[] { 1, null })
319 +    {
320          CompletableFuture<Integer> f = new CompletableFuture<>();
321          assertEquals(0, f.getNumberOfDependents());
322 <        CompletableFuture g = f.thenRun(new Noop(ExecutionMode.DEFAULT));
322 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
323          assertEquals(1, f.getNumberOfDependents());
324          assertEquals(0, g.getNumberOfDependents());
325 <        CompletableFuture h = f.thenRun(new Noop(ExecutionMode.DEFAULT));
325 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
326          assertEquals(2, f.getNumberOfDependents());
327 <        f.complete(1);
327 >        assertEquals(0, h.getNumberOfDependents());
328 >        assertTrue(f.complete(v1));
329          checkCompletedNormally(g, null);
330 +        checkCompletedNormally(h, null);
331          assertEquals(0, f.getNumberOfDependents());
332          assertEquals(0, g.getNumberOfDependents());
333 <    }
333 >        assertEquals(0, h.getNumberOfDependents());
334 >    }}
335  
336      /**
337       * toString indicates current completion state
338       */
339 <    public void testToString() {
340 <        CompletableFuture<String> f;
341 <
342 <        f = new CompletableFuture<String>();
343 <        assertTrue(f.toString().contains("[Not completed]"));
344 <
345 <        f.complete("foo");
346 <        assertTrue(f.toString().contains("[Completed normally]"));
347 <
348 <        f = new CompletableFuture<String>();
349 <        f.completeExceptionally(new IndexOutOfBoundsException());
350 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
339 >    public void testToString_incomplete() {
340 >        CompletableFuture<String> f = new CompletableFuture<>();
341 >        assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
342 >        if (testImplementationDetails)
343 >            assertEquals(identityString(f) + "[Not completed]",
344 >                         f.toString());
345 >    }
346 >
347 >    public void testToString_normal() {
348 >        CompletableFuture<String> f = new CompletableFuture<>();
349 >        assertTrue(f.complete("foo"));
350 >        assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]"));
351 >        if (testImplementationDetails)
352 >            assertEquals(identityString(f) + "[Completed normally]",
353 >                         f.toString());
354 >    }
355 >
356 >    public void testToString_exception() {
357 >        CompletableFuture<String> f = new CompletableFuture<>();
358 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
359 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
360 >        if (testImplementationDetails)
361 >            assertTrue(f.toString().startsWith(
362 >                               identityString(f) + "[Completed exceptionally: "));
363 >    }
364 >
365 >    public void testToString_cancelled() {
366 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
367 >            CompletableFuture<String> f = new CompletableFuture<>();
368 >            assertTrue(f.cancel(mayInterruptIfRunning));
369 >            assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
370 >            if (testImplementationDetails)
371 >                assertTrue(f.toString().startsWith(
372 >                                   identityString(f) + "[Completed exceptionally: "));
373 >        }
374      }
375  
376      /**
# Line 320 | Line 381 | public class CompletableFutureTest exten
381          checkCompletedNormally(f, "test");
382      }
383  
384 <    abstract class CheckedAction {
384 >    abstract static class CheckedAction {
385          int invocationCount = 0;
386          final ExecutionMode m;
387          CheckedAction(ExecutionMode m) { this.m = m; }
# Line 332 | Line 393 | public class CompletableFutureTest exten
393          void assertInvoked() { assertEquals(1, invocationCount); }
394      }
395  
396 <    abstract class CheckedIntegerAction extends CheckedAction {
396 >    abstract static class CheckedIntegerAction extends CheckedAction {
397          Integer value;
398          CheckedIntegerAction(ExecutionMode m) { super(m); }
399          void assertValue(Integer expected) {
# Line 341 | Line 402 | public class CompletableFutureTest exten
402          }
403      }
404  
405 <    class IntegerSupplier extends CheckedAction
405 >    static class IntegerSupplier extends CheckedAction
406          implements Supplier<Integer>
407      {
408          final Integer value;
# Line 360 | Line 421 | public class CompletableFutureTest exten
421          return (x == null) ? null : x + 1;
422      }
423  
424 <    class NoopConsumer extends CheckedIntegerAction
424 >    static class NoopConsumer extends CheckedIntegerAction
425          implements Consumer<Integer>
426      {
427          NoopConsumer(ExecutionMode m) { super(m); }
# Line 370 | Line 431 | public class CompletableFutureTest exten
431          }
432      }
433  
434 <    class IncFunction extends CheckedIntegerAction
434 >    static class IncFunction extends CheckedIntegerAction
435          implements Function<Integer,Integer>
436      {
437          IncFunction(ExecutionMode m) { super(m); }
# Line 388 | Line 449 | public class CompletableFutureTest exten
449              - ((y == null) ? 99 : y.intValue());
450      }
451  
452 <    class SubtractAction extends CheckedIntegerAction
452 >    static class SubtractAction extends CheckedIntegerAction
453          implements BiConsumer<Integer, Integer>
454      {
455          SubtractAction(ExecutionMode m) { super(m); }
# Line 398 | Line 459 | public class CompletableFutureTest exten
459          }
460      }
461  
462 <    class SubtractFunction extends CheckedIntegerAction
462 >    static class SubtractFunction extends CheckedIntegerAction
463          implements BiFunction<Integer, Integer, Integer>
464      {
465          SubtractFunction(ExecutionMode m) { super(m); }
# Line 408 | Line 469 | public class CompletableFutureTest exten
469          }
470      }
471  
472 <    class Noop extends CheckedAction implements Runnable {
472 >    static class Noop extends CheckedAction implements Runnable {
473          Noop(ExecutionMode m) { super(m); }
474          public void run() {
475              invoked();
476          }
477      }
478  
479 <    class FailingSupplier extends CheckedAction
479 >    static class FailingSupplier extends CheckedAction
480          implements Supplier<Integer>
481      {
482 <        FailingSupplier(ExecutionMode m) { super(m); }
482 >        final CFException ex;
483 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
484          public Integer get() {
485              invoked();
486 <            throw new CFException();
486 >            throw ex;
487          }
488      }
489  
490 <    class FailingConsumer extends CheckedIntegerAction
490 >    static class FailingConsumer extends CheckedIntegerAction
491          implements Consumer<Integer>
492      {
493 <        FailingConsumer(ExecutionMode m) { super(m); }
493 >        final CFException ex;
494 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
495          public void accept(Integer x) {
496              invoked();
497              value = x;
498 <            throw new CFException();
498 >            throw ex;
499          }
500      }
501  
502 <    class FailingBiConsumer extends CheckedIntegerAction
502 >    static class FailingBiConsumer extends CheckedIntegerAction
503          implements BiConsumer<Integer, Integer>
504      {
505 <        FailingBiConsumer(ExecutionMode m) { super(m); }
505 >        final CFException ex;
506 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
507          public void accept(Integer x, Integer y) {
508              invoked();
509              value = subtract(x, y);
510 <            throw new CFException();
510 >            throw ex;
511          }
512      }
513  
514 <    class FailingFunction extends CheckedIntegerAction
514 >    static class FailingFunction extends CheckedIntegerAction
515          implements Function<Integer, Integer>
516      {
517 <        FailingFunction(ExecutionMode m) { super(m); }
517 >        final CFException ex;
518 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
519          public Integer apply(Integer x) {
520              invoked();
521              value = x;
522 <            throw new CFException();
522 >            throw ex;
523          }
524      }
525  
526 <    class FailingBiFunction extends CheckedIntegerAction
526 >    static class FailingBiFunction extends CheckedIntegerAction
527          implements BiFunction<Integer, Integer, Integer>
528      {
529 <        FailingBiFunction(ExecutionMode m) { super(m); }
529 >        final CFException ex;
530 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
531          public Integer apply(Integer x, Integer y) {
532              invoked();
533              value = subtract(x, y);
534 <            throw new CFException();
534 >            throw ex;
535          }
536      }
537  
538 <    class FailingRunnable extends CheckedAction implements Runnable {
539 <        FailingRunnable(ExecutionMode m) { super(m); }
538 >    static class FailingRunnable extends CheckedAction implements Runnable {
539 >        final CFException ex;
540 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
541          public void run() {
542              invoked();
543 <            throw new CFException();
543 >            throw ex;
544          }
545      }
546  
547 <
481 <    class CompletableFutureInc extends CheckedIntegerAction
547 >    static class CompletableFutureInc extends CheckedIntegerAction
548          implements Function<Integer, CompletableFuture<Integer>>
549      {
550          CompletableFutureInc(ExecutionMode m) { super(m); }
551          public CompletableFuture<Integer> apply(Integer x) {
552              invoked();
553              value = x;
554 <            CompletableFuture<Integer> f = new CompletableFuture<>();
555 <            f.complete(inc(x));
556 <            return f;
554 >            return CompletableFuture.completedFuture(inc(x));
555 >        }
556 >    }
557 >
558 >    static class FailingExceptionalCompletableFutureFunction extends CheckedAction
559 >        implements Function<Throwable, CompletableFuture<Integer>>
560 >    {
561 >        final CFException ex;
562 >        FailingExceptionalCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
563 >        public CompletableFuture<Integer> apply(Throwable x) {
564 >            invoked();
565 >            throw ex;
566 >        }
567 >    }
568 >
569 >    static class ExceptionalCompletableFutureFunction extends CheckedAction
570 >        implements Function<Throwable, CompletionStage<Integer>> {
571 >        final Integer value = 3;
572 >        ExceptionalCompletableFutureFunction(ExecutionMode m) { super(m); }
573 >        public CompletionStage<Integer> apply(Throwable x) {
574 >            invoked();
575 >            return CompletableFuture.completedFuture(value);
576          }
577      }
578  
579 <    class FailingCompletableFutureFunction extends CheckedIntegerAction
579 >    static class FailingCompletableFutureFunction extends CheckedIntegerAction
580          implements Function<Integer, CompletableFuture<Integer>>
581      {
582 <        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
582 >        final CFException ex;
583 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
584          public CompletableFuture<Integer> apply(Integer x) {
585              invoked();
586              value = x;
587 <            throw new CFException();
587 >            throw ex;
588 >        }
589 >    }
590 >
591 >    static class CountingRejectingExecutor implements Executor {
592 >        final RejectedExecutionException ex = new RejectedExecutionException();
593 >        final AtomicInteger count = new AtomicInteger(0);
594 >        public void execute(Runnable r) {
595 >            count.getAndIncrement();
596 >            throw ex;
597          }
598      }
599  
# Line 516 | Line 611 | public class CompletableFutureTest exten
611          }
612      }
613  
614 +    static final boolean defaultExecutorIsCommonPool
615 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
616 +
617      /**
618       * Permits the testing of parallel code for the 3 different
619       * execution modes without copy/pasting all the test methods.
620       */
621      enum ExecutionMode {
622 <        DEFAULT {
622 >        SYNC {
623              public void checkExecutionMode() {
624                  assertFalse(ThreadExecutor.startedCurrentThread());
625                  assertNull(ForkJoinTask.getPool());
# Line 593 | Line 691 | public class CompletableFutureTest exten
691                   Function<? super T,U> a) {
692                  return f.applyToEither(g, a);
693              }
694 +            public <T> CompletableFuture<T> exceptionally
695 +                (CompletableFuture<T> f,
696 +                 Function<Throwable, ? extends T> fn) {
697 +                return f.exceptionally(fn);
698 +            }
699 +            public <T> CompletableFuture<T> exceptionallyCompose
700 +                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
701 +                return f.exceptionallyCompose(fn);
702 +            }
703          },
597
704          ASYNC {
705              public void checkExecutionMode() {
706 <                assertSame(ForkJoinPool.commonPool(),
707 <                           ForkJoinTask.getPool());
706 >                assertEquals(defaultExecutorIsCommonPool,
707 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
708              }
709              public CompletableFuture<Void> runAsync(Runnable a) {
710                  return CompletableFuture.runAsync(a);
# Line 667 | Line 773 | public class CompletableFutureTest exten
773                   Function<? super T,U> a) {
774                  return f.applyToEitherAsync(g, a);
775              }
776 +            public <T> CompletableFuture<T> exceptionally
777 +                (CompletableFuture<T> f,
778 +                 Function<Throwable, ? extends T> fn) {
779 +                return f.exceptionallyAsync(fn);
780 +            }
781 +
782 +            public <T> CompletableFuture<T> exceptionallyCompose
783 +                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
784 +                return f.exceptionallyComposeAsync(fn);
785 +            }
786 +
787          },
788  
789          EXECUTOR {
# Line 740 | Line 857 | public class CompletableFutureTest exten
857                   Function<? super T,U> a) {
858                  return f.applyToEitherAsync(g, a, new ThreadExecutor());
859              }
860 +            public <T> CompletableFuture<T> exceptionally
861 +                (CompletableFuture<T> f,
862 +                 Function<Throwable, ? extends T> fn) {
863 +                return f.exceptionallyAsync(fn, new ThreadExecutor());
864 +            }
865 +            public <T> CompletableFuture<T> exceptionallyCompose
866 +                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
867 +                return f.exceptionallyComposeAsync(fn, new ThreadExecutor());
868 +            }
869 +
870          };
871  
872          public abstract void checkExecutionMode();
# Line 782 | Line 909 | public class CompletableFutureTest exten
909              (CompletableFuture<T> f,
910               CompletionStage<? extends T> g,
911               Function<? super T,U> a);
912 +        public abstract <T> CompletableFuture<T> exceptionally
913 +            (CompletableFuture<T> f,
914 +             Function<Throwable, ? extends T> fn);
915 +        public abstract <T> CompletableFuture<T> exceptionallyCompose
916 +            (CompletableFuture<T> f,
917 +             Function<Throwable, ? extends CompletionStage<T>> fn);
918      }
919  
920      /**
# Line 789 | Line 922 | public class CompletableFutureTest exten
922       * normally, and source result is propagated
923       */
924      public void testExceptionally_normalCompletion() {
925 +        for (ExecutionMode m : ExecutionMode.values())
926          for (boolean createIncomplete : new boolean[] { true, false })
927          for (Integer v1 : new Integer[] { 1, null })
928      {
795        final AtomicInteger a = new AtomicInteger(0);
929          final CompletableFuture<Integer> f = new CompletableFuture<>();
930 <        if (!createIncomplete) f.complete(v1);
931 <        final CompletableFuture<Integer> g = f.exceptionally
932 <            ((Throwable t) -> {
933 <                // Should not be called
934 <                a.getAndIncrement();
802 <                throw new AssertionError();
930 >        if (!createIncomplete) assertTrue(f.complete(v1));
931 >        final CompletableFuture<Integer> g = m.exceptionally
932 >            (f, (Throwable t) -> {
933 >                threadFail("should not be called");
934 >                return null;            // unreached
935              });
936 <        if (createIncomplete) f.complete(v1);
936 >        if (createIncomplete) assertTrue(f.complete(v1));
937  
938          checkCompletedNormally(g, v1);
939          checkCompletedNormally(f, v1);
808        assertEquals(0, a.get());
940      }}
941  
811
942      /**
943       * exceptionally action completes with function value on source
944       * exception
945       */
946      public void testExceptionally_exceptionalCompletion() {
947 +        for (ExecutionMode m : ExecutionMode.values())
948          for (boolean createIncomplete : new boolean[] { true, false })
949          for (Integer v1 : new Integer[] { 1, null })
950      {
# Line 821 | Line 952 | public class CompletableFutureTest exten
952          final CFException ex = new CFException();
953          final CompletableFuture<Integer> f = new CompletableFuture<>();
954          if (!createIncomplete) f.completeExceptionally(ex);
955 <        final CompletableFuture<Integer> g = f.exceptionally
956 <            ((Throwable t) -> {
957 <                ExecutionMode.DEFAULT.checkExecutionMode();
955 >        final CompletableFuture<Integer> g = m.exceptionally
956 >            (f, (Throwable t) -> {
957 >                m.checkExecutionMode();
958                  threadAssertSame(t, ex);
959                  a.getAndIncrement();
960                  return v1;
# Line 834 | Line 965 | public class CompletableFutureTest exten
965          assertEquals(1, a.get());
966      }}
967  
968 +    /**
969 +     * If an "exceptionally action" throws an exception, it completes
970 +     * exceptionally with that exception
971 +     */
972      public void testExceptionally_exceptionalCompletionActionFailed() {
973 +        for (ExecutionMode m : ExecutionMode.values())
974 +        for (boolean createIncomplete : new boolean[] { true, false })
975 +    {
976 +        final AtomicInteger a = new AtomicInteger(0);
977 +        final CFException ex1 = new CFException();
978 +        final CFException ex2 = new CFException();
979 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
980 +        if (!createIncomplete) f.completeExceptionally(ex1);
981 +        final CompletableFuture<Integer> g = m.exceptionally
982 +            (f, (Throwable t) -> {
983 +                m.checkExecutionMode();
984 +                threadAssertSame(t, ex1);
985 +                a.getAndIncrement();
986 +                throw ex2;
987 +            });
988 +        if (createIncomplete) f.completeExceptionally(ex1);
989 +
990 +        checkCompletedWithWrappedException(g, ex2);
991 +        checkCompletedExceptionally(f, ex1);
992 +        assertEquals(1, a.get());
993 +    }}
994 +
995 +    /**
996 +     * whenComplete action executes on normal completion, propagating
997 +     * source result.
998 +     */
999 +    public void testWhenComplete_normalCompletion() {
1000 +        for (ExecutionMode m : ExecutionMode.values())
1001 +        for (boolean createIncomplete : new boolean[] { true, false })
1002 +        for (Integer v1 : new Integer[] { 1, null })
1003 +    {
1004 +        final AtomicInteger a = new AtomicInteger(0);
1005 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1006 +        if (!createIncomplete) assertTrue(f.complete(v1));
1007 +        final CompletableFuture<Integer> g = m.whenComplete
1008 +            (f,
1009 +             (Integer result, Throwable t) -> {
1010 +                m.checkExecutionMode();
1011 +                threadAssertSame(result, v1);
1012 +                threadAssertNull(t);
1013 +                a.getAndIncrement();
1014 +            });
1015 +        if (createIncomplete) assertTrue(f.complete(v1));
1016 +
1017 +        checkCompletedNormally(g, v1);
1018 +        checkCompletedNormally(f, v1);
1019 +        assertEquals(1, a.get());
1020 +    }}
1021 +
1022 +    /**
1023 +     * whenComplete action executes on exceptional completion, propagating
1024 +     * source result.
1025 +     */
1026 +    public void testWhenComplete_exceptionalCompletion() {
1027 +        for (ExecutionMode m : ExecutionMode.values())
1028 +        for (boolean createIncomplete : new boolean[] { true, false })
1029 +    {
1030 +        final AtomicInteger a = new AtomicInteger(0);
1031 +        final CFException ex = new CFException();
1032 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1033 +        if (!createIncomplete) f.completeExceptionally(ex);
1034 +        final CompletableFuture<Integer> g = m.whenComplete
1035 +            (f,
1036 +             (Integer result, Throwable t) -> {
1037 +                m.checkExecutionMode();
1038 +                threadAssertNull(result);
1039 +                threadAssertSame(t, ex);
1040 +                a.getAndIncrement();
1041 +            });
1042 +        if (createIncomplete) f.completeExceptionally(ex);
1043 +
1044 +        checkCompletedWithWrappedException(g, ex);
1045 +        checkCompletedExceptionally(f, ex);
1046 +        assertEquals(1, a.get());
1047 +    }}
1048 +
1049 +    /**
1050 +     * whenComplete action executes on cancelled source, propagating
1051 +     * CancellationException.
1052 +     */
1053 +    public void testWhenComplete_sourceCancelled() {
1054 +        for (ExecutionMode m : ExecutionMode.values())
1055 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1056 +        for (boolean createIncomplete : new boolean[] { true, false })
1057 +    {
1058 +        final AtomicInteger a = new AtomicInteger(0);
1059 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1060 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1061 +        final CompletableFuture<Integer> g = m.whenComplete
1062 +            (f,
1063 +             (Integer result, Throwable t) -> {
1064 +                m.checkExecutionMode();
1065 +                threadAssertNull(result);
1066 +                threadAssertTrue(t instanceof CancellationException);
1067 +                a.getAndIncrement();
1068 +            });
1069 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1070 +
1071 +        checkCompletedWithWrappedCancellationException(g);
1072 +        checkCancelled(f);
1073 +        assertEquals(1, a.get());
1074 +    }}
1075 +
1076 +    /**
1077 +     * If a whenComplete action throws an exception when triggered by
1078 +     * a normal completion, it completes exceptionally
1079 +     */
1080 +    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1081          for (boolean createIncomplete : new boolean[] { true, false })
1082 +        for (ExecutionMode m : ExecutionMode.values())
1083          for (Integer v1 : new Integer[] { 1, null })
1084      {
1085          final AtomicInteger a = new AtomicInteger(0);
1086 +        final CFException ex = new CFException();
1087 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1088 +        if (!createIncomplete) assertTrue(f.complete(v1));
1089 +        final CompletableFuture<Integer> g = m.whenComplete
1090 +            (f,
1091 +             (Integer result, Throwable t) -> {
1092 +                m.checkExecutionMode();
1093 +                threadAssertSame(result, v1);
1094 +                threadAssertNull(t);
1095 +                a.getAndIncrement();
1096 +                throw ex;
1097 +            });
1098 +        if (createIncomplete) assertTrue(f.complete(v1));
1099 +
1100 +        checkCompletedWithWrappedException(g, ex);
1101 +        checkCompletedNormally(f, v1);
1102 +        assertEquals(1, a.get());
1103 +    }}
1104 +
1105 +    /**
1106 +     * If a whenComplete action throws an exception when triggered by
1107 +     * a source completion that also throws an exception, the source
1108 +     * exception takes precedence (unlike handle)
1109 +     */
1110 +    public void testWhenComplete_sourceFailedActionFailed() {
1111 +        for (boolean createIncomplete : new boolean[] { true, false })
1112 +        for (ExecutionMode m : ExecutionMode.values())
1113 +    {
1114 +        final AtomicInteger a = new AtomicInteger(0);
1115          final CFException ex1 = new CFException();
1116          final CFException ex2 = new CFException();
1117          final CompletableFuture<Integer> f = new CompletableFuture<>();
1118 +
1119          if (!createIncomplete) f.completeExceptionally(ex1);
1120 <        final CompletableFuture<Integer> g = f.exceptionally
1121 <            ((Throwable t) -> {
1122 <                ExecutionMode.DEFAULT.checkExecutionMode();
1120 >        final CompletableFuture<Integer> g = m.whenComplete
1121 >            (f,
1122 >             (Integer result, Throwable t) -> {
1123 >                m.checkExecutionMode();
1124                  threadAssertSame(t, ex1);
1125 +                threadAssertNull(result);
1126                  a.getAndIncrement();
1127                  throw ex2;
1128              });
1129          if (createIncomplete) f.completeExceptionally(ex1);
1130  
1131 <        checkCompletedWithWrappedCFException(g, ex2);
1131 >        checkCompletedWithWrappedException(g, ex1);
1132 >        checkCompletedExceptionally(f, ex1);
1133 >        if (testImplementationDetails) {
1134 >            assertEquals(1, ex1.getSuppressed().length);
1135 >            assertSame(ex2, ex1.getSuppressed()[0]);
1136 >        }
1137          assertEquals(1, a.get());
1138      }}
1139  
# Line 867 | Line 1148 | public class CompletableFutureTest exten
1148      {
1149          final CompletableFuture<Integer> f = new CompletableFuture<>();
1150          final AtomicInteger a = new AtomicInteger(0);
1151 <        if (!createIncomplete) f.complete(v1);
1151 >        if (!createIncomplete) assertTrue(f.complete(v1));
1152          final CompletableFuture<Integer> g = m.handle
1153              (f,
1154 <             (Integer x, Throwable t) -> {
1154 >             (Integer result, Throwable t) -> {
1155                  m.checkExecutionMode();
1156 <                threadAssertSame(x, v1);
1156 >                threadAssertSame(result, v1);
1157                  threadAssertNull(t);
1158                  a.getAndIncrement();
1159                  return inc(v1);
1160              });
1161 <        if (createIncomplete) f.complete(v1);
1161 >        if (createIncomplete) assertTrue(f.complete(v1));
1162  
1163          checkCompletedNormally(g, inc(v1));
1164          checkCompletedNormally(f, v1);
# Line 899 | Line 1180 | public class CompletableFutureTest exten
1180          if (!createIncomplete) f.completeExceptionally(ex);
1181          final CompletableFuture<Integer> g = m.handle
1182              (f,
1183 <             (Integer x, Throwable t) -> {
1183 >             (Integer result, Throwable t) -> {
1184                  m.checkExecutionMode();
1185 <                threadAssertNull(x);
1185 >                threadAssertNull(result);
1186                  threadAssertSame(t, ex);
1187                  a.getAndIncrement();
1188                  return v1;
# Line 909 | Line 1190 | public class CompletableFutureTest exten
1190          if (createIncomplete) f.completeExceptionally(ex);
1191  
1192          checkCompletedNormally(g, v1);
1193 <        checkCompletedWithWrappedCFException(f, ex);
1193 >        checkCompletedExceptionally(f, ex);
1194          assertEquals(1, a.get());
1195      }}
1196  
# Line 928 | Line 1209 | public class CompletableFutureTest exten
1209          if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1210          final CompletableFuture<Integer> g = m.handle
1211              (f,
1212 <             (Integer x, Throwable t) -> {
1212 >             (Integer result, Throwable t) -> {
1213                  m.checkExecutionMode();
1214 <                threadAssertNull(x);
1214 >                threadAssertNull(result);
1215                  threadAssertTrue(t instanceof CancellationException);
1216                  a.getAndIncrement();
1217                  return v1;
# Line 943 | Line 1224 | public class CompletableFutureTest exten
1224      }}
1225  
1226      /**
1227 <     * handle result completes exceptionally if action does
1227 >     * If a "handle action" throws an exception when triggered by
1228 >     * a normal completion, it completes exceptionally
1229       */
1230 <    public void testHandle_sourceFailedActionFailed() {
1230 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1231          for (ExecutionMode m : ExecutionMode.values())
1232          for (boolean createIncomplete : new boolean[] { true, false })
1233 +        for (Integer v1 : new Integer[] { 1, null })
1234      {
1235          final CompletableFuture<Integer> f = new CompletableFuture<>();
1236          final AtomicInteger a = new AtomicInteger(0);
1237 <        final CFException ex1 = new CFException();
1238 <        final CFException ex2 = new CFException();
956 <        if (!createIncomplete) f.completeExceptionally(ex1);
1237 >        final CFException ex = new CFException();
1238 >        if (!createIncomplete) assertTrue(f.complete(v1));
1239          final CompletableFuture<Integer> g = m.handle
1240              (f,
1241 <             (Integer x, Throwable t) -> {
1241 >             (Integer result, Throwable t) -> {
1242                  m.checkExecutionMode();
1243 <                threadAssertNull(x);
1244 <                threadAssertSame(ex1, t);
1243 >                threadAssertSame(result, v1);
1244 >                threadAssertNull(t);
1245                  a.getAndIncrement();
1246 <                throw ex2;
1246 >                throw ex;
1247              });
1248 <        if (createIncomplete) f.completeExceptionally(ex1);
1248 >        if (createIncomplete) assertTrue(f.complete(v1));
1249  
1250 <        checkCompletedWithWrappedCFException(g, ex2);
1251 <        checkCompletedWithWrappedCFException(f, ex1);
1250 >        checkCompletedWithWrappedException(g, ex);
1251 >        checkCompletedNormally(f, v1);
1252          assertEquals(1, a.get());
1253      }}
1254  
1255 <    public void testHandle_sourceCompletedNormallyActionFailed() {
1256 <        for (ExecutionMode m : ExecutionMode.values())
1255 >    /**
1256 >     * If a "handle action" throws an exception when triggered by
1257 >     * a source completion that also throws an exception, the action
1258 >     * exception takes precedence (unlike whenComplete)
1259 >     */
1260 >    public void testHandle_sourceFailedActionFailed() {
1261          for (boolean createIncomplete : new boolean[] { true, false })
1262 <        for (Integer v1 : new Integer[] { 1, null })
1262 >        for (ExecutionMode m : ExecutionMode.values())
1263      {
978        final CompletableFuture<Integer> f = new CompletableFuture<>();
1264          final AtomicInteger a = new AtomicInteger(0);
1265 <        final CFException ex = new CFException();
1266 <        if (!createIncomplete) f.complete(v1);
1265 >        final CFException ex1 = new CFException();
1266 >        final CFException ex2 = new CFException();
1267 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1268 >
1269 >        if (!createIncomplete) f.completeExceptionally(ex1);
1270          final CompletableFuture<Integer> g = m.handle
1271              (f,
1272 <             (Integer x, Throwable t) -> {
1272 >             (Integer result, Throwable t) -> {
1273                  m.checkExecutionMode();
1274 <                threadAssertSame(x, v1);
1275 <                threadAssertNull(t);
1274 >                threadAssertNull(result);
1275 >                threadAssertSame(ex1, t);
1276                  a.getAndIncrement();
1277 <                throw ex;
1277 >                throw ex2;
1278              });
1279 <        if (createIncomplete) f.complete(v1);
1279 >        if (createIncomplete) f.completeExceptionally(ex1);
1280  
1281 <        checkCompletedWithWrappedCFException(g, ex);
1282 <        checkCompletedNormally(f, v1);
1281 >        checkCompletedWithWrappedException(g, ex2);
1282 >        checkCompletedExceptionally(f, ex1);
1283          assertEquals(1, a.get());
1284      }}
1285  
# Line 1024 | Line 1312 | public class CompletableFutureTest exten
1312      {
1313          final FailingRunnable r = new FailingRunnable(m);
1314          final CompletableFuture<Void> f = m.runAsync(r);
1315 <        checkCompletedWithWrappedCFException(f);
1315 >        checkCompletedWithWrappedException(f, r.ex);
1316          r.assertInvoked();
1317      }}
1318  
1319 +    @SuppressWarnings("FutureReturnValueIgnored")
1320 +    public void testRunAsync_rejectingExecutor() {
1321 +        CountingRejectingExecutor e = new CountingRejectingExecutor();
1322 +        try {
1323 +            CompletableFuture.runAsync(() -> {}, e);
1324 +            shouldThrow();
1325 +        } catch (Throwable t) {
1326 +            assertSame(e.ex, t);
1327 +        }
1328 +
1329 +        assertEquals(1, e.count.get());
1330 +    }
1331 +
1332      /**
1333       * supplyAsync completes with result of supplier
1334       */
# Line 1058 | Line 1359 | public class CompletableFutureTest exten
1359      {
1360          FailingSupplier r = new FailingSupplier(m);
1361          CompletableFuture<Integer> f = m.supplyAsync(r);
1362 <        checkCompletedWithWrappedCFException(f);
1362 >        checkCompletedWithWrappedException(f, r.ex);
1363          r.assertInvoked();
1364      }}
1365  
1366 +    @SuppressWarnings("FutureReturnValueIgnored")
1367 +    public void testSupplyAsync_rejectingExecutor() {
1368 +        CountingRejectingExecutor e = new CountingRejectingExecutor();
1369 +        try {
1370 +            CompletableFuture.supplyAsync(() -> null, e);
1371 +            shouldThrow();
1372 +        } catch (Throwable t) {
1373 +            assertSame(e.ex, t);
1374 +        }
1375 +
1376 +        assertEquals(1, e.count.get());
1377 +    }
1378 +
1379      // seq completion methods
1380  
1381      /**
# Line 1069 | Line 1383 | public class CompletableFutureTest exten
1383       */
1384      public void testThenRun_normalCompletion() {
1385          for (ExecutionMode m : ExecutionMode.values())
1072        for (boolean createIncomplete : new boolean[] { true, false })
1386          for (Integer v1 : new Integer[] { 1, null })
1387      {
1388          final CompletableFuture<Integer> f = new CompletableFuture<>();
1389 <        final Noop r = new Noop(m);
1390 <        if (!createIncomplete) f.complete(v1);
1078 <        final CompletableFuture<Void> g = m.thenRun(f, r);
1079 <        if (createIncomplete) {
1080 <            checkIncomplete(g);
1081 <            f.complete(v1);
1082 <        }
1389 >        final Noop[] rs = new Noop[6];
1390 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1391  
1392 <        checkCompletedNormally(g, null);
1392 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1393 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1394 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1395 >        checkIncomplete(h0);
1396 >        checkIncomplete(h1);
1397 >        checkIncomplete(h2);
1398 >        assertTrue(f.complete(v1));
1399 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1400 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1401 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1402 >
1403 >        checkCompletedNormally(h0, null);
1404 >        checkCompletedNormally(h1, null);
1405 >        checkCompletedNormally(h2, null);
1406 >        checkCompletedNormally(h3, null);
1407 >        checkCompletedNormally(h4, null);
1408 >        checkCompletedNormally(h5, null);
1409          checkCompletedNormally(f, v1);
1410 <        r.assertInvoked();
1410 >        for (Noop r : rs) r.assertInvoked();
1411      }}
1412  
1413      /**
# Line 1092 | Line 1416 | public class CompletableFutureTest exten
1416       */
1417      public void testThenRun_exceptionalCompletion() {
1418          for (ExecutionMode m : ExecutionMode.values())
1095        for (boolean createIncomplete : new boolean[] { true, false })
1419      {
1420          final CFException ex = new CFException();
1421          final CompletableFuture<Integer> f = new CompletableFuture<>();
1422 <        final Noop r = new Noop(m);
1423 <        if (!createIncomplete) f.completeExceptionally(ex);
1101 <        final CompletableFuture<Void> g = m.thenRun(f, r);
1102 <        if (createIncomplete) {
1103 <            checkIncomplete(g);
1104 <            f.completeExceptionally(ex);
1105 <        }
1422 >        final Noop[] rs = new Noop[6];
1423 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1424  
1425 <        checkCompletedWithWrappedCFException(g, ex);
1426 <        checkCompletedWithWrappedCFException(f, ex);
1427 <        r.assertNotInvoked();
1425 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1426 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1427 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1428 >        checkIncomplete(h0);
1429 >        checkIncomplete(h1);
1430 >        checkIncomplete(h2);
1431 >        assertTrue(f.completeExceptionally(ex));
1432 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1433 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1434 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1435 >
1436 >        checkCompletedWithWrappedException(h0, ex);
1437 >        checkCompletedWithWrappedException(h1, ex);
1438 >        checkCompletedWithWrappedException(h2, ex);
1439 >        checkCompletedWithWrappedException(h3, ex);
1440 >        checkCompletedWithWrappedException(h4, ex);
1441 >        checkCompletedWithWrappedException(h5, ex);
1442 >        checkCompletedExceptionally(f, ex);
1443 >        for (Noop r : rs) r.assertNotInvoked();
1444      }}
1445  
1446      /**
# Line 1114 | Line 1448 | public class CompletableFutureTest exten
1448       */
1449      public void testThenRun_sourceCancelled() {
1450          for (ExecutionMode m : ExecutionMode.values())
1117        for (boolean createIncomplete : new boolean[] { true, false })
1451          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1452      {
1453          final CompletableFuture<Integer> f = new CompletableFuture<>();
1454 <        final Noop r = new Noop(m);
1455 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1123 <        final CompletableFuture<Void> g = m.thenRun(f, r);
1124 <        if (createIncomplete) {
1125 <            checkIncomplete(g);
1126 <            assertTrue(f.cancel(mayInterruptIfRunning));
1127 <        }
1454 >        final Noop[] rs = new Noop[6];
1455 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1456  
1457 <        checkCompletedWithWrappedCancellationException(g);
1457 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1458 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1459 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1460 >        checkIncomplete(h0);
1461 >        checkIncomplete(h1);
1462 >        checkIncomplete(h2);
1463 >        assertTrue(f.cancel(mayInterruptIfRunning));
1464 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1465 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1466 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1467 >
1468 >        checkCompletedWithWrappedCancellationException(h0);
1469 >        checkCompletedWithWrappedCancellationException(h1);
1470 >        checkCompletedWithWrappedCancellationException(h2);
1471 >        checkCompletedWithWrappedCancellationException(h3);
1472 >        checkCompletedWithWrappedCancellationException(h4);
1473 >        checkCompletedWithWrappedCancellationException(h5);
1474          checkCancelled(f);
1475 <        r.assertNotInvoked();
1475 >        for (Noop r : rs) r.assertNotInvoked();
1476      }}
1477  
1478      /**
# Line 1136 | Line 1480 | public class CompletableFutureTest exten
1480       */
1481      public void testThenRun_actionFailed() {
1482          for (ExecutionMode m : ExecutionMode.values())
1139        for (boolean createIncomplete : new boolean[] { true, false })
1483          for (Integer v1 : new Integer[] { 1, null })
1484      {
1485          final CompletableFuture<Integer> f = new CompletableFuture<>();
1486 <        final FailingRunnable r = new FailingRunnable(m);
1487 <        if (!createIncomplete) f.complete(v1);
1145 <        final CompletableFuture<Void> g = m.thenRun(f, r);
1146 <        if (createIncomplete) {
1147 <            checkIncomplete(g);
1148 <            f.complete(v1);
1149 <        }
1486 >        final FailingRunnable[] rs = new FailingRunnable[6];
1487 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1488  
1489 <        checkCompletedWithWrappedCFException(g);
1489 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1490 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1491 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1492 >        assertTrue(f.complete(v1));
1493 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1494 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1495 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1496 >
1497 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1498 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1499 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1500 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1501 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1502 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1503          checkCompletedNormally(f, v1);
1504      }}
1505  
# Line 1157 | Line 1508 | public class CompletableFutureTest exten
1508       */
1509      public void testThenApply_normalCompletion() {
1510          for (ExecutionMode m : ExecutionMode.values())
1160        for (boolean createIncomplete : new boolean[] { true, false })
1511          for (Integer v1 : new Integer[] { 1, null })
1512      {
1513          final CompletableFuture<Integer> f = new CompletableFuture<>();
1514 <        final IncFunction r = new IncFunction(m);
1515 <        if (!createIncomplete) f.complete(v1);
1166 <        final CompletableFuture<Integer> g = m.thenApply(f, r);
1167 <        if (createIncomplete) {
1168 <            checkIncomplete(g);
1169 <            f.complete(v1);
1170 <        }
1514 >        final IncFunction[] rs = new IncFunction[4];
1515 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1516  
1517 <        checkCompletedNormally(g, inc(v1));
1517 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1518 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1519 >        checkIncomplete(h0);
1520 >        checkIncomplete(h1);
1521 >        assertTrue(f.complete(v1));
1522 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1523 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1524 >
1525 >        checkCompletedNormally(h0, inc(v1));
1526 >        checkCompletedNormally(h1, inc(v1));
1527 >        checkCompletedNormally(h2, inc(v1));
1528 >        checkCompletedNormally(h3, inc(v1));
1529          checkCompletedNormally(f, v1);
1530 <        r.assertInvoked();
1530 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1531      }}
1532  
1533      /**
# Line 1180 | Line 1536 | public class CompletableFutureTest exten
1536       */
1537      public void testThenApply_exceptionalCompletion() {
1538          for (ExecutionMode m : ExecutionMode.values())
1183        for (boolean createIncomplete : new boolean[] { true, false })
1539      {
1540          final CFException ex = new CFException();
1541          final CompletableFuture<Integer> f = new CompletableFuture<>();
1542 <        final IncFunction r = new IncFunction(m);
1543 <        if (!createIncomplete) f.completeExceptionally(ex);
1189 <        final CompletableFuture<Integer> g = m.thenApply(f, r);
1190 <        if (createIncomplete) {
1191 <            checkIncomplete(g);
1192 <            f.completeExceptionally(ex);
1193 <        }
1542 >        final IncFunction[] rs = new IncFunction[4];
1543 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1544  
1545 <        checkCompletedWithWrappedCFException(g, ex);
1546 <        checkCompletedWithWrappedCFException(f, ex);
1547 <        r.assertNotInvoked();
1545 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1546 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1547 >        assertTrue(f.completeExceptionally(ex));
1548 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1549 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1550 >
1551 >        checkCompletedWithWrappedException(h0, ex);
1552 >        checkCompletedWithWrappedException(h1, ex);
1553 >        checkCompletedWithWrappedException(h2, ex);
1554 >        checkCompletedWithWrappedException(h3, ex);
1555 >        checkCompletedExceptionally(f, ex);
1556 >        for (IncFunction r : rs) r.assertNotInvoked();
1557      }}
1558  
1559      /**
# Line 1202 | Line 1561 | public class CompletableFutureTest exten
1561       */
1562      public void testThenApply_sourceCancelled() {
1563          for (ExecutionMode m : ExecutionMode.values())
1205        for (boolean createIncomplete : new boolean[] { true, false })
1564          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1565      {
1566          final CompletableFuture<Integer> f = new CompletableFuture<>();
1567 <        final IncFunction r = new IncFunction(m);
1568 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1211 <        final CompletableFuture<Integer> g = m.thenApply(f, r);
1212 <        if (createIncomplete) {
1213 <            checkIncomplete(g);
1214 <            assertTrue(f.cancel(mayInterruptIfRunning));
1215 <        }
1567 >        final IncFunction[] rs = new IncFunction[4];
1568 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1569  
1570 <        checkCompletedWithWrappedCancellationException(g);
1570 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1571 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1572 >        assertTrue(f.cancel(mayInterruptIfRunning));
1573 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1574 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1575 >
1576 >        checkCompletedWithWrappedCancellationException(h0);
1577 >        checkCompletedWithWrappedCancellationException(h1);
1578 >        checkCompletedWithWrappedCancellationException(h2);
1579 >        checkCompletedWithWrappedCancellationException(h3);
1580          checkCancelled(f);
1581 <        r.assertNotInvoked();
1581 >        for (IncFunction r : rs) r.assertNotInvoked();
1582      }}
1583  
1584      /**
# Line 1224 | Line 1586 | public class CompletableFutureTest exten
1586       */
1587      public void testThenApply_actionFailed() {
1588          for (ExecutionMode m : ExecutionMode.values())
1227        for (boolean createIncomplete : new boolean[] { true, false })
1589          for (Integer v1 : new Integer[] { 1, null })
1590      {
1591          final CompletableFuture<Integer> f = new CompletableFuture<>();
1592 <        final FailingFunction r = new FailingFunction(m);
1593 <        if (!createIncomplete) f.complete(v1);
1233 <        final CompletableFuture<Integer> g = m.thenApply(f, r);
1234 <        if (createIncomplete) {
1235 <            checkIncomplete(g);
1236 <            f.complete(v1);
1237 <        }
1592 >        final FailingFunction[] rs = new FailingFunction[4];
1593 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1594  
1595 <        checkCompletedWithWrappedCFException(g);
1595 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1596 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1597 >        assertTrue(f.complete(v1));
1598 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1599 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1600 >
1601 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1602 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1603 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1604 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1605          checkCompletedNormally(f, v1);
1606      }}
1607  
# Line 1245 | Line 1610 | public class CompletableFutureTest exten
1610       */
1611      public void testThenAccept_normalCompletion() {
1612          for (ExecutionMode m : ExecutionMode.values())
1248        for (boolean createIncomplete : new boolean[] { true, false })
1613          for (Integer v1 : new Integer[] { 1, null })
1614      {
1615          final CompletableFuture<Integer> f = new CompletableFuture<>();
1616 <        final NoopConsumer r = new NoopConsumer(m);
1617 <        if (!createIncomplete) f.complete(v1);
1254 <        final CompletableFuture<Void> g = m.thenAccept(f, r);
1255 <        if (createIncomplete) {
1256 <            checkIncomplete(g);
1257 <            f.complete(v1);
1258 <        }
1616 >        final NoopConsumer[] rs = new NoopConsumer[4];
1617 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1618  
1619 <        checkCompletedNormally(g, null);
1620 <        r.assertValue(v1);
1619 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1620 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1621 >        checkIncomplete(h0);
1622 >        checkIncomplete(h1);
1623 >        assertTrue(f.complete(v1));
1624 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1625 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1626 >
1627 >        checkCompletedNormally(h0, null);
1628 >        checkCompletedNormally(h1, null);
1629 >        checkCompletedNormally(h2, null);
1630 >        checkCompletedNormally(h3, null);
1631          checkCompletedNormally(f, v1);
1632 +        for (NoopConsumer r : rs) r.assertValue(v1);
1633      }}
1634  
1635      /**
# Line 1268 | Line 1638 | public class CompletableFutureTest exten
1638       */
1639      public void testThenAccept_exceptionalCompletion() {
1640          for (ExecutionMode m : ExecutionMode.values())
1271        for (boolean createIncomplete : new boolean[] { true, false })
1641      {
1642          final CFException ex = new CFException();
1643          final CompletableFuture<Integer> f = new CompletableFuture<>();
1644 <        final NoopConsumer r = new NoopConsumer(m);
1645 <        if (!createIncomplete) f.completeExceptionally(ex);
1277 <        final CompletableFuture<Void> g = m.thenAccept(f, r);
1278 <        if (createIncomplete) {
1279 <            checkIncomplete(g);
1280 <            f.completeExceptionally(ex);
1281 <        }
1644 >        final NoopConsumer[] rs = new NoopConsumer[4];
1645 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1646  
1647 <        checkCompletedWithWrappedCFException(g, ex);
1648 <        checkCompletedWithWrappedCFException(f, ex);
1649 <        r.assertNotInvoked();
1647 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1648 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1649 >        assertTrue(f.completeExceptionally(ex));
1650 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1651 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1652 >
1653 >        checkCompletedWithWrappedException(h0, ex);
1654 >        checkCompletedWithWrappedException(h1, ex);
1655 >        checkCompletedWithWrappedException(h2, ex);
1656 >        checkCompletedWithWrappedException(h3, ex);
1657 >        checkCompletedExceptionally(f, ex);
1658 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1659      }}
1660  
1661      /**
# Line 1290 | Line 1663 | public class CompletableFutureTest exten
1663       */
1664      public void testThenAccept_sourceCancelled() {
1665          for (ExecutionMode m : ExecutionMode.values())
1293        for (boolean createIncomplete : new boolean[] { true, false })
1666          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1667      {
1668          final CompletableFuture<Integer> f = new CompletableFuture<>();
1669 <        final NoopConsumer r = new NoopConsumer(m);
1670 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1299 <        final CompletableFuture<Void> g = m.thenAccept(f, r);
1300 <        if (createIncomplete) {
1301 <            checkIncomplete(g);
1302 <            assertTrue(f.cancel(mayInterruptIfRunning));
1303 <        }
1669 >        final NoopConsumer[] rs = new NoopConsumer[4];
1670 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1671  
1672 <        checkCompletedWithWrappedCancellationException(g);
1672 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1673 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1674 >        assertTrue(f.cancel(mayInterruptIfRunning));
1675 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1676 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1677 >
1678 >        checkCompletedWithWrappedCancellationException(h0);
1679 >        checkCompletedWithWrappedCancellationException(h1);
1680 >        checkCompletedWithWrappedCancellationException(h2);
1681 >        checkCompletedWithWrappedCancellationException(h3);
1682          checkCancelled(f);
1683 <        r.assertNotInvoked();
1683 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1684      }}
1685  
1686      /**
# Line 1312 | Line 1688 | public class CompletableFutureTest exten
1688       */
1689      public void testThenAccept_actionFailed() {
1690          for (ExecutionMode m : ExecutionMode.values())
1315        for (boolean createIncomplete : new boolean[] { true, false })
1691          for (Integer v1 : new Integer[] { 1, null })
1692      {
1693          final CompletableFuture<Integer> f = new CompletableFuture<>();
1694 <        final FailingConsumer r = new FailingConsumer(m);
1695 <        if (!createIncomplete) f.complete(v1);
1321 <        final CompletableFuture<Void> g = m.thenAccept(f, r);
1322 <        if (createIncomplete) {
1323 <            checkIncomplete(g);
1324 <            f.complete(v1);
1325 <        }
1694 >        final FailingConsumer[] rs = new FailingConsumer[4];
1695 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1696  
1697 <        checkCompletedWithWrappedCFException(g);
1697 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1698 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1699 >        assertTrue(f.complete(v1));
1700 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1701 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1702 >
1703 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1704 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1705 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1706 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1707          checkCompletedNormally(f, v1);
1708      }}
1709  
# Line 1334 | Line 1713 | public class CompletableFutureTest exten
1713       */
1714      public void testThenCombine_normalCompletion() {
1715          for (ExecutionMode m : ExecutionMode.values())
1337        for (boolean createIncomplete : new boolean[] { true, false })
1716          for (boolean fFirst : new boolean[] { true, false })
1717          for (Integer v1 : new Integer[] { 1, null })
1718          for (Integer v2 : new Integer[] { 2, null })
1719      {
1720          final CompletableFuture<Integer> f = new CompletableFuture<>();
1721          final CompletableFuture<Integer> g = new CompletableFuture<>();
1722 <        final SubtractFunction r = new SubtractFunction(m);
1722 >        final SubtractFunction[] rs = new SubtractFunction[6];
1723 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1724  
1725 <        if (fFirst) f.complete(v1); else g.complete(v2);
1726 <        if (!createIncomplete)
1727 <            if (!fFirst) f.complete(v1); else g.complete(v2);
1728 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1729 <        if (createIncomplete) {
1730 <            checkIncomplete(h);
1731 <            r.assertNotInvoked();
1732 <            if (!fFirst) f.complete(v1); else g.complete(v2);
1733 <        }
1725 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1726 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1727 >        final Integer w1 =  fFirst ? v1 : v2;
1728 >        final Integer w2 = !fFirst ? v1 : v2;
1729 >
1730 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1731 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1732 >        assertTrue(fst.complete(w1));
1733 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1734 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1735 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1736 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1737 >        checkCompletedNormally(h1, subtract(w1, w1));
1738 >        checkCompletedNormally(h3, subtract(w1, w1));
1739 >        rs[1].assertValue(subtract(w1, w1));
1740 >        rs[3].assertValue(subtract(w1, w1));
1741 >        assertTrue(snd.complete(w2));
1742 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1743 >
1744 >        checkCompletedNormally(h0, subtract(v1, v2));
1745 >        checkCompletedNormally(h2, subtract(v1, v2));
1746 >        checkCompletedNormally(h4, subtract(v1, v2));
1747 >        rs[0].assertValue(subtract(v1, v2));
1748 >        rs[2].assertValue(subtract(v1, v2));
1749 >        rs[4].assertValue(subtract(v1, v2));
1750  
1356        checkCompletedNormally(h, subtract(v1, v2));
1751          checkCompletedNormally(f, v1);
1752          checkCompletedNormally(g, v2);
1359        r.assertInvoked();
1753      }}
1754  
1755      /**
1756       * thenCombine result completes exceptionally after exceptional
1757       * completion of either source
1758       */
1759 <    public void testThenCombine_exceptionalCompletion() {
1759 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1760          for (ExecutionMode m : ExecutionMode.values())
1368        for (boolean createIncomplete : new boolean[] { true, false })
1761          for (boolean fFirst : new boolean[] { true, false })
1762 +        for (boolean failFirst : new boolean[] { true, false })
1763          for (Integer v1 : new Integer[] { 1, null })
1764      {
1765          final CompletableFuture<Integer> f = new CompletableFuture<>();
1766          final CompletableFuture<Integer> g = new CompletableFuture<>();
1767          final CFException ex = new CFException();
1768 <        final SubtractFunction r = new SubtractFunction(m);
1769 <
1770 <        (fFirst ? f : g).complete(v1);
1771 <        if (!createIncomplete)
1772 <            (!fFirst ? f : g).completeExceptionally(ex);
1773 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1774 <        if (createIncomplete) {
1775 <            checkIncomplete(h);
1776 <            (!fFirst ? f : g).completeExceptionally(ex);
1777 <        }
1778 <
1779 <        checkCompletedWithWrappedCFException(h, ex);
1780 <        r.assertNotInvoked();
1781 <        checkCompletedNormally(fFirst ? f : g, v1);
1782 <        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
1768 >        final SubtractFunction r1 = new SubtractFunction(m);
1769 >        final SubtractFunction r2 = new SubtractFunction(m);
1770 >        final SubtractFunction r3 = new SubtractFunction(m);
1771 >
1772 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1773 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1774 >        final Callable<Boolean> complete1 = failFirst ?
1775 >            () -> fst.completeExceptionally(ex) :
1776 >            () -> fst.complete(v1);
1777 >        final Callable<Boolean> complete2 = failFirst ?
1778 >            () -> snd.complete(v1) :
1779 >            () -> snd.completeExceptionally(ex);
1780 >
1781 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1782 >        assertTrue(complete1.call());
1783 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1784 >        checkIncomplete(h1);
1785 >        checkIncomplete(h2);
1786 >        assertTrue(complete2.call());
1787 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1788 >
1789 >        checkCompletedWithWrappedException(h1, ex);
1790 >        checkCompletedWithWrappedException(h2, ex);
1791 >        checkCompletedWithWrappedException(h3, ex);
1792 >        r1.assertNotInvoked();
1793 >        r2.assertNotInvoked();
1794 >        r3.assertNotInvoked();
1795 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1796 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1797      }}
1798  
1799      /**
1800       * thenCombine result completes exceptionally if either source cancelled
1801       */
1802 <    public void testThenCombine_sourceCancelled() {
1802 >    public void testThenCombine_sourceCancelled() throws Throwable {
1803          for (ExecutionMode m : ExecutionMode.values())
1804          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1398        for (boolean createIncomplete : new boolean[] { true, false })
1805          for (boolean fFirst : new boolean[] { true, false })
1806 +        for (boolean failFirst : new boolean[] { true, false })
1807          for (Integer v1 : new Integer[] { 1, null })
1808      {
1809          final CompletableFuture<Integer> f = new CompletableFuture<>();
1810          final CompletableFuture<Integer> g = new CompletableFuture<>();
1811 <        final SubtractFunction r = new SubtractFunction(m);
1812 <
1813 <        (fFirst ? f : g).complete(v1);
1814 <        if (!createIncomplete)
1815 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1816 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1817 <        if (createIncomplete) {
1818 <            checkIncomplete(h);
1819 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1820 <        }
1811 >        final SubtractFunction r1 = new SubtractFunction(m);
1812 >        final SubtractFunction r2 = new SubtractFunction(m);
1813 >        final SubtractFunction r3 = new SubtractFunction(m);
1814 >
1815 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1816 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1817 >        final Callable<Boolean> complete1 = failFirst ?
1818 >            () -> fst.cancel(mayInterruptIfRunning) :
1819 >            () -> fst.complete(v1);
1820 >        final Callable<Boolean> complete2 = failFirst ?
1821 >            () -> snd.complete(v1) :
1822 >            () -> snd.cancel(mayInterruptIfRunning);
1823 >
1824 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1825 >        assertTrue(complete1.call());
1826 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1827 >        checkIncomplete(h1);
1828 >        checkIncomplete(h2);
1829 >        assertTrue(complete2.call());
1830 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1831  
1832 <        checkCompletedWithWrappedCancellationException(h);
1833 <        checkCancelled(!fFirst ? f : g);
1834 <        r.assertNotInvoked();
1835 <        checkCompletedNormally(fFirst ? f : g, v1);
1832 >        checkCompletedWithWrappedCancellationException(h1);
1833 >        checkCompletedWithWrappedCancellationException(h2);
1834 >        checkCompletedWithWrappedCancellationException(h3);
1835 >        r1.assertNotInvoked();
1836 >        r2.assertNotInvoked();
1837 >        r3.assertNotInvoked();
1838 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1839 >        checkCancelled(failFirst ? fst : snd);
1840      }}
1841  
1842      /**
# Line 1429 | Line 1850 | public class CompletableFutureTest exten
1850      {
1851          final CompletableFuture<Integer> f = new CompletableFuture<>();
1852          final CompletableFuture<Integer> g = new CompletableFuture<>();
1853 <        final FailingBiFunction r = new FailingBiFunction(m);
1854 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1855 <
1856 <        if (fFirst) {
1857 <            f.complete(v1);
1858 <            g.complete(v2);
1859 <        } else {
1860 <            g.complete(v2);
1861 <            f.complete(v1);
1862 <        }
1863 <
1864 <        checkCompletedWithWrappedCFException(h);
1853 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1854 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1855 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1856 >
1857 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1858 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1859 >        final Integer w1 =  fFirst ? v1 : v2;
1860 >        final Integer w2 = !fFirst ? v1 : v2;
1861 >
1862 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1863 >        assertTrue(fst.complete(w1));
1864 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1865 >        assertTrue(snd.complete(w2));
1866 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1867 >
1868 >        checkCompletedWithWrappedException(h1, r1.ex);
1869 >        checkCompletedWithWrappedException(h2, r2.ex);
1870 >        checkCompletedWithWrappedException(h3, r3.ex);
1871 >        r1.assertInvoked();
1872 >        r2.assertInvoked();
1873 >        r3.assertInvoked();
1874          checkCompletedNormally(f, v1);
1875          checkCompletedNormally(g, v2);
1876      }}
# Line 1451 | Line 1881 | public class CompletableFutureTest exten
1881       */
1882      public void testThenAcceptBoth_normalCompletion() {
1883          for (ExecutionMode m : ExecutionMode.values())
1454        for (boolean createIncomplete : new boolean[] { true, false })
1884          for (boolean fFirst : new boolean[] { true, false })
1885          for (Integer v1 : new Integer[] { 1, null })
1886          for (Integer v2 : new Integer[] { 2, null })
1887      {
1888          final CompletableFuture<Integer> f = new CompletableFuture<>();
1889          final CompletableFuture<Integer> g = new CompletableFuture<>();
1890 <        final SubtractAction r = new SubtractAction(m);
1891 <
1892 <        if (fFirst) f.complete(v1); else g.complete(v2);
1893 <        if (!createIncomplete)
1894 <            if (!fFirst) f.complete(v1); else g.complete(v2);
1895 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1896 <        if (createIncomplete) {
1897 <            checkIncomplete(h);
1898 <            r.assertNotInvoked();
1899 <            if (!fFirst) f.complete(v1); else g.complete(v2);
1900 <        }
1890 >        final SubtractAction r1 = new SubtractAction(m);
1891 >        final SubtractAction r2 = new SubtractAction(m);
1892 >        final SubtractAction r3 = new SubtractAction(m);
1893 >
1894 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1895 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1896 >        final Integer w1 =  fFirst ? v1 : v2;
1897 >        final Integer w2 = !fFirst ? v1 : v2;
1898 >
1899 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1900 >        assertTrue(fst.complete(w1));
1901 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1902 >        checkIncomplete(h1);
1903 >        checkIncomplete(h2);
1904 >        r1.assertNotInvoked();
1905 >        r2.assertNotInvoked();
1906 >        assertTrue(snd.complete(w2));
1907 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1908  
1909 <        checkCompletedNormally(h, null);
1910 <        r.assertValue(subtract(v1, v2));
1909 >        checkCompletedNormally(h1, null);
1910 >        checkCompletedNormally(h2, null);
1911 >        checkCompletedNormally(h3, null);
1912 >        r1.assertValue(subtract(v1, v2));
1913 >        r2.assertValue(subtract(v1, v2));
1914 >        r3.assertValue(subtract(v1, v2));
1915          checkCompletedNormally(f, v1);
1916          checkCompletedNormally(g, v2);
1917      }}
# Line 1480 | Line 1920 | public class CompletableFutureTest exten
1920       * thenAcceptBoth result completes exceptionally after exceptional
1921       * completion of either source
1922       */
1923 <    public void testThenAcceptBoth_exceptionalCompletion() {
1923 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1924          for (ExecutionMode m : ExecutionMode.values())
1485        for (boolean createIncomplete : new boolean[] { true, false })
1925          for (boolean fFirst : new boolean[] { true, false })
1926 +        for (boolean failFirst : new boolean[] { true, false })
1927          for (Integer v1 : new Integer[] { 1, null })
1928      {
1929          final CompletableFuture<Integer> f = new CompletableFuture<>();
1930          final CompletableFuture<Integer> g = new CompletableFuture<>();
1931          final CFException ex = new CFException();
1932 <        final SubtractAction r = new SubtractAction(m);
1933 <
1934 <        (fFirst ? f : g).complete(v1);
1935 <        if (!createIncomplete)
1936 <            (!fFirst ? f : g).completeExceptionally(ex);
1937 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1938 <        if (createIncomplete) {
1939 <            checkIncomplete(h);
1940 <            (!fFirst ? f : g).completeExceptionally(ex);
1941 <        }
1942 <
1943 <        checkCompletedWithWrappedCFException(h, ex);
1944 <        r.assertNotInvoked();
1945 <        checkCompletedNormally(fFirst ? f : g, v1);
1946 <        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
1932 >        final SubtractAction r1 = new SubtractAction(m);
1933 >        final SubtractAction r2 = new SubtractAction(m);
1934 >        final SubtractAction r3 = new SubtractAction(m);
1935 >
1936 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1937 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1938 >        final Callable<Boolean> complete1 = failFirst ?
1939 >            () -> fst.completeExceptionally(ex) :
1940 >            () -> fst.complete(v1);
1941 >        final Callable<Boolean> complete2 = failFirst ?
1942 >            () -> snd.complete(v1) :
1943 >            () -> snd.completeExceptionally(ex);
1944 >
1945 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1946 >        assertTrue(complete1.call());
1947 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1948 >        checkIncomplete(h1);
1949 >        checkIncomplete(h2);
1950 >        assertTrue(complete2.call());
1951 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1952 >
1953 >        checkCompletedWithWrappedException(h1, ex);
1954 >        checkCompletedWithWrappedException(h2, ex);
1955 >        checkCompletedWithWrappedException(h3, ex);
1956 >        r1.assertNotInvoked();
1957 >        r2.assertNotInvoked();
1958 >        r3.assertNotInvoked();
1959 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1960 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1961      }}
1962  
1963      /**
1964       * thenAcceptBoth result completes exceptionally if either source cancelled
1965       */
1966 <    public void testThenAcceptBoth_sourceCancelled() {
1966 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1967          for (ExecutionMode m : ExecutionMode.values())
1968          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1515        for (boolean createIncomplete : new boolean[] { true, false })
1969          for (boolean fFirst : new boolean[] { true, false })
1970 +        for (boolean failFirst : new boolean[] { true, false })
1971          for (Integer v1 : new Integer[] { 1, null })
1972      {
1973          final CompletableFuture<Integer> f = new CompletableFuture<>();
1974          final CompletableFuture<Integer> g = new CompletableFuture<>();
1975 <        final SubtractAction r = new SubtractAction(m);
1976 <
1977 <        (fFirst ? f : g).complete(v1);
1978 <        if (!createIncomplete)
1979 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1980 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1981 <        if (createIncomplete) {
1982 <            checkIncomplete(h);
1983 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1984 <        }
1975 >        final SubtractAction r1 = new SubtractAction(m);
1976 >        final SubtractAction r2 = new SubtractAction(m);
1977 >        final SubtractAction r3 = new SubtractAction(m);
1978 >
1979 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1980 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1981 >        final Callable<Boolean> complete1 = failFirst ?
1982 >            () -> fst.cancel(mayInterruptIfRunning) :
1983 >            () -> fst.complete(v1);
1984 >        final Callable<Boolean> complete2 = failFirst ?
1985 >            () -> snd.complete(v1) :
1986 >            () -> snd.cancel(mayInterruptIfRunning);
1987 >
1988 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1989 >        assertTrue(complete1.call());
1990 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1991 >        checkIncomplete(h1);
1992 >        checkIncomplete(h2);
1993 >        assertTrue(complete2.call());
1994 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1995  
1996 <        checkCompletedWithWrappedCancellationException(h);
1997 <        checkCancelled(!fFirst ? f : g);
1998 <        r.assertNotInvoked();
1999 <        checkCompletedNormally(fFirst ? f : g, v1);
1996 >        checkCompletedWithWrappedCancellationException(h1);
1997 >        checkCompletedWithWrappedCancellationException(h2);
1998 >        checkCompletedWithWrappedCancellationException(h3);
1999 >        r1.assertNotInvoked();
2000 >        r2.assertNotInvoked();
2001 >        r3.assertNotInvoked();
2002 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2003 >        checkCancelled(failFirst ? fst : snd);
2004      }}
2005  
2006      /**
# Line 1546 | Line 2014 | public class CompletableFutureTest exten
2014      {
2015          final CompletableFuture<Integer> f = new CompletableFuture<>();
2016          final CompletableFuture<Integer> g = new CompletableFuture<>();
2017 <        final FailingBiConsumer r = new FailingBiConsumer(m);
2018 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
2019 <
2020 <        if (fFirst) {
2021 <            f.complete(v1);
2022 <            g.complete(v2);
2023 <        } else {
2024 <            g.complete(v2);
2025 <            f.complete(v1);
2026 <        }
2027 <
2028 <        checkCompletedWithWrappedCFException(h);
2017 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
2018 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
2019 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
2020 >
2021 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2022 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2023 >        final Integer w1 =  fFirst ? v1 : v2;
2024 >        final Integer w2 = !fFirst ? v1 : v2;
2025 >
2026 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
2027 >        assertTrue(fst.complete(w1));
2028 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
2029 >        assertTrue(snd.complete(w2));
2030 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
2031 >
2032 >        checkCompletedWithWrappedException(h1, r1.ex);
2033 >        checkCompletedWithWrappedException(h2, r2.ex);
2034 >        checkCompletedWithWrappedException(h3, r3.ex);
2035 >        r1.assertInvoked();
2036 >        r2.assertInvoked();
2037 >        r3.assertInvoked();
2038          checkCompletedNormally(f, v1);
2039          checkCompletedNormally(g, v2);
2040      }}
# Line 1568 | Line 2045 | public class CompletableFutureTest exten
2045       */
2046      public void testRunAfterBoth_normalCompletion() {
2047          for (ExecutionMode m : ExecutionMode.values())
1571        for (boolean createIncomplete : new boolean[] { true, false })
2048          for (boolean fFirst : new boolean[] { true, false })
2049          for (Integer v1 : new Integer[] { 1, null })
2050          for (Integer v2 : new Integer[] { 2, null })
2051      {
2052          final CompletableFuture<Integer> f = new CompletableFuture<>();
2053          final CompletableFuture<Integer> g = new CompletableFuture<>();
2054 <        final Noop r = new Noop(m);
2055 <
2056 <        if (fFirst) f.complete(v1); else g.complete(v2);
2057 <        if (!createIncomplete)
2058 <            if (!fFirst) f.complete(v1); else g.complete(v2);
2059 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2060 <        if (createIncomplete) {
2061 <            checkIncomplete(h);
2062 <            r.assertNotInvoked();
2063 <            if (!fFirst) f.complete(v1); else g.complete(v2);
2064 <        }
2054 >        final Noop r1 = new Noop(m);
2055 >        final Noop r2 = new Noop(m);
2056 >        final Noop r3 = new Noop(m);
2057 >
2058 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2059 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2060 >        final Integer w1 =  fFirst ? v1 : v2;
2061 >        final Integer w2 = !fFirst ? v1 : v2;
2062 >
2063 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2064 >        assertTrue(fst.complete(w1));
2065 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2066 >        checkIncomplete(h1);
2067 >        checkIncomplete(h2);
2068 >        r1.assertNotInvoked();
2069 >        r2.assertNotInvoked();
2070 >        assertTrue(snd.complete(w2));
2071 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2072  
2073 <        checkCompletedNormally(h, null);
2074 <        r.assertInvoked();
2073 >        checkCompletedNormally(h1, null);
2074 >        checkCompletedNormally(h2, null);
2075 >        checkCompletedNormally(h3, null);
2076 >        r1.assertInvoked();
2077 >        r2.assertInvoked();
2078 >        r3.assertInvoked();
2079          checkCompletedNormally(f, v1);
2080          checkCompletedNormally(g, v2);
2081      }}
# Line 1597 | Line 2084 | public class CompletableFutureTest exten
2084       * runAfterBoth result completes exceptionally after exceptional
2085       * completion of either source
2086       */
2087 <    public void testRunAfterBoth_exceptionalCompletion() {
2087 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2088          for (ExecutionMode m : ExecutionMode.values())
1602        for (boolean createIncomplete : new boolean[] { true, false })
2089          for (boolean fFirst : new boolean[] { true, false })
2090 +        for (boolean failFirst : new boolean[] { true, false })
2091          for (Integer v1 : new Integer[] { 1, null })
2092      {
2093          final CompletableFuture<Integer> f = new CompletableFuture<>();
2094          final CompletableFuture<Integer> g = new CompletableFuture<>();
2095          final CFException ex = new CFException();
2096 <        final Noop r = new Noop(m);
2097 <
2098 <        (fFirst ? f : g).complete(v1);
2099 <        if (!createIncomplete)
2100 <            (!fFirst ? f : g).completeExceptionally(ex);
2101 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2102 <        if (createIncomplete) {
2103 <            checkIncomplete(h);
2104 <            (!fFirst ? f : g).completeExceptionally(ex);
2105 <        }
2106 <
2107 <        checkCompletedWithWrappedCFException(h, ex);
2108 <        r.assertNotInvoked();
2109 <        checkCompletedNormally(fFirst ? f : g, v1);
2110 <        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
2096 >        final Noop r1 = new Noop(m);
2097 >        final Noop r2 = new Noop(m);
2098 >        final Noop r3 = new Noop(m);
2099 >
2100 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2101 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2102 >        final Callable<Boolean> complete1 = failFirst ?
2103 >            () -> fst.completeExceptionally(ex) :
2104 >            () -> fst.complete(v1);
2105 >        final Callable<Boolean> complete2 = failFirst ?
2106 >            () -> snd.complete(v1) :
2107 >            () -> snd.completeExceptionally(ex);
2108 >
2109 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2110 >        assertTrue(complete1.call());
2111 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2112 >        checkIncomplete(h1);
2113 >        checkIncomplete(h2);
2114 >        assertTrue(complete2.call());
2115 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2116 >
2117 >        checkCompletedWithWrappedException(h1, ex);
2118 >        checkCompletedWithWrappedException(h2, ex);
2119 >        checkCompletedWithWrappedException(h3, ex);
2120 >        r1.assertNotInvoked();
2121 >        r2.assertNotInvoked();
2122 >        r3.assertNotInvoked();
2123 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2124 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2125      }}
2126  
2127      /**
2128       * runAfterBoth result completes exceptionally if either source cancelled
2129       */
2130 <    public void testRunAfterBoth_sourceCancelled() {
2130 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2131          for (ExecutionMode m : ExecutionMode.values())
2132          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1632        for (boolean createIncomplete : new boolean[] { true, false })
2133          for (boolean fFirst : new boolean[] { true, false })
2134 +        for (boolean failFirst : new boolean[] { true, false })
2135          for (Integer v1 : new Integer[] { 1, null })
2136      {
2137          final CompletableFuture<Integer> f = new CompletableFuture<>();
2138          final CompletableFuture<Integer> g = new CompletableFuture<>();
2139 <        final Noop r = new Noop(m);
2140 <
2141 <
2142 <        (fFirst ? f : g).complete(v1);
2143 <        if (!createIncomplete)
2144 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
2145 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2146 <        if (createIncomplete) {
2147 <            checkIncomplete(h);
2148 <            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
2149 <        }
2139 >        final Noop r1 = new Noop(m);
2140 >        final Noop r2 = new Noop(m);
2141 >        final Noop r3 = new Noop(m);
2142 >
2143 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2144 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2145 >        final Callable<Boolean> complete1 = failFirst ?
2146 >            () -> fst.cancel(mayInterruptIfRunning) :
2147 >            () -> fst.complete(v1);
2148 >        final Callable<Boolean> complete2 = failFirst ?
2149 >            () -> snd.complete(v1) :
2150 >            () -> snd.cancel(mayInterruptIfRunning);
2151 >
2152 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2153 >        assertTrue(complete1.call());
2154 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2155 >        checkIncomplete(h1);
2156 >        checkIncomplete(h2);
2157 >        assertTrue(complete2.call());
2158 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2159  
2160 <        checkCompletedWithWrappedCancellationException(h);
2161 <        checkCancelled(!fFirst ? f : g);
2162 <        r.assertNotInvoked();
2163 <        checkCompletedNormally(fFirst ? f : g, v1);
2160 >        checkCompletedWithWrappedCancellationException(h1);
2161 >        checkCompletedWithWrappedCancellationException(h2);
2162 >        checkCompletedWithWrappedCancellationException(h3);
2163 >        r1.assertNotInvoked();
2164 >        r2.assertNotInvoked();
2165 >        r3.assertNotInvoked();
2166 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2167 >        checkCancelled(failFirst ? fst : snd);
2168      }}
2169  
2170      /**
# Line 1666 | Line 2180 | public class CompletableFutureTest exten
2180          final CompletableFuture<Integer> g = new CompletableFuture<>();
2181          final FailingRunnable r1 = new FailingRunnable(m);
2182          final FailingRunnable r2 = new FailingRunnable(m);
2183 +        final FailingRunnable r3 = new FailingRunnable(m);
2184  
2185 <        CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2186 <        if (fFirst) {
2187 <            f.complete(v1);
2188 <            g.complete(v2);
2189 <        } else {
2190 <            g.complete(v2);
2191 <            f.complete(v1);
2192 <        }
2193 <        CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2194 <
2195 <        checkCompletedWithWrappedCFException(h1);
2196 <        checkCompletedWithWrappedCFException(h2);
2185 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2186 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2187 >        final Integer w1 =  fFirst ? v1 : v2;
2188 >        final Integer w2 = !fFirst ? v1 : v2;
2189 >
2190 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2191 >        assertTrue(fst.complete(w1));
2192 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2193 >        assertTrue(snd.complete(w2));
2194 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2195 >
2196 >        checkCompletedWithWrappedException(h1, r1.ex);
2197 >        checkCompletedWithWrappedException(h2, r2.ex);
2198 >        checkCompletedWithWrappedException(h3, r3.ex);
2199 >        r1.assertInvoked();
2200 >        r2.assertInvoked();
2201 >        r3.assertInvoked();
2202          checkCompletedNormally(f, v1);
2203          checkCompletedNormally(g, v2);
2204      }}
# Line 1752 | Line 2272 | public class CompletableFutureTest exten
2272          rs[0].assertNotInvoked();
2273          rs[1].assertNotInvoked();
2274          f.completeExceptionally(ex);
2275 <        checkCompletedWithWrappedCFException(h0, ex);
2276 <        checkCompletedWithWrappedCFException(h1, ex);
2275 >        checkCompletedWithWrappedException(h0, ex);
2276 >        checkCompletedWithWrappedException(h1, ex);
2277          final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2278          final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2279 <        checkCompletedWithWrappedCFException(h2, ex);
2280 <        checkCompletedWithWrappedCFException(h3, ex);
2279 >        checkCompletedWithWrappedException(h2, ex);
2280 >        checkCompletedWithWrappedException(h3, ex);
2281          g.complete(v1);
2282  
2283          // unspecified behavior - both source completions available
# Line 1765 | Line 2285 | public class CompletableFutureTest exten
2285          final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2286          try {
2287              assertEquals(inc(v1), h4.join());
2288 <            rs[4].assertInvoked();
2288 >            rs[4].assertValue(inc(v1));
2289          } catch (CompletionException ok) {
2290 <            checkCompletedWithWrappedCFException(h4, ex);
2290 >            checkCompletedWithWrappedException(h4, ex);
2291              rs[4].assertNotInvoked();
2292          }
2293          try {
2294              assertEquals(inc(v1), h5.join());
2295 <            rs[5].assertInvoked();
2295 >            rs[5].assertValue(inc(v1));
2296          } catch (CompletionException ok) {
2297 <            checkCompletedWithWrappedCFException(h5, ex);
2297 >            checkCompletedWithWrappedException(h5, ex);
2298              rs[5].assertNotInvoked();
2299          }
2300  
2301 <        checkCompletedWithWrappedCFException(f, ex);
2301 >        checkCompletedExceptionally(f, ex);
2302          checkCompletedNormally(g, v1);
2303 <        checkCompletedWithWrappedCFException(h0, ex);
2304 <        checkCompletedWithWrappedCFException(h1, ex);
2305 <        checkCompletedWithWrappedCFException(h2, ex);
2306 <        checkCompletedWithWrappedCFException(h3, ex);
2307 <        checkCompletedWithWrappedCFException(h4, ex);
2303 >        checkCompletedWithWrappedException(h0, ex);
2304 >        checkCompletedWithWrappedException(h1, ex);
2305 >        checkCompletedWithWrappedException(h2, ex);
2306 >        checkCompletedWithWrappedException(h3, ex);
2307 >        checkCompletedWithWrappedException(h4, ex);
2308          for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2309      }}
2310  
2311 +    public void testApplyToEither_exceptionalCompletion2() {
2312 +        for (ExecutionMode m : ExecutionMode.values())
2313 +        for (boolean fFirst : new boolean[] { true, false })
2314 +        for (Integer v1 : new Integer[] { 1, null })
2315 +    {
2316 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2317 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2318 +        final CFException ex = new CFException();
2319 +        final IncFunction[] rs = new IncFunction[6];
2320 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2321 +
2322 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2323 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2324 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2325 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2326 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2327 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2328 +
2329 +        // unspecified behavior - both source completions available
2330 +        try {
2331 +            assertEquals(inc(v1), h0.join());
2332 +            rs[0].assertValue(inc(v1));
2333 +        } catch (CompletionException ok) {
2334 +            checkCompletedWithWrappedException(h0, ex);
2335 +            rs[0].assertNotInvoked();
2336 +        }
2337 +        try {
2338 +            assertEquals(inc(v1), h1.join());
2339 +            rs[1].assertValue(inc(v1));
2340 +        } catch (CompletionException ok) {
2341 +            checkCompletedWithWrappedException(h1, ex);
2342 +            rs[1].assertNotInvoked();
2343 +        }
2344 +        try {
2345 +            assertEquals(inc(v1), h2.join());
2346 +            rs[2].assertValue(inc(v1));
2347 +        } catch (CompletionException ok) {
2348 +            checkCompletedWithWrappedException(h2, ex);
2349 +            rs[2].assertNotInvoked();
2350 +        }
2351 +        try {
2352 +            assertEquals(inc(v1), h3.join());
2353 +            rs[3].assertValue(inc(v1));
2354 +        } catch (CompletionException ok) {
2355 +            checkCompletedWithWrappedException(h3, ex);
2356 +            rs[3].assertNotInvoked();
2357 +        }
2358 +
2359 +        checkCompletedNormally(f, v1);
2360 +        checkCompletedExceptionally(g, ex);
2361 +    }}
2362 +
2363      /**
2364       * applyToEither result completes exceptionally if either source cancelled
2365       */
# Line 1821 | Line 2393 | public class CompletableFutureTest exten
2393          final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2394          try {
2395              assertEquals(inc(v1), h4.join());
2396 <            rs[4].assertInvoked();
2396 >            rs[4].assertValue(inc(v1));
2397          } catch (CompletionException ok) {
2398              checkCompletedWithWrappedCancellationException(h4);
2399              rs[4].assertNotInvoked();
2400          }
2401          try {
2402              assertEquals(inc(v1), h5.join());
2403 <            rs[5].assertInvoked();
2403 >            rs[5].assertValue(inc(v1));
2404          } catch (CompletionException ok) {
2405              checkCompletedWithWrappedCancellationException(h5);
2406              rs[5].assertNotInvoked();
# Line 1843 | Line 2415 | public class CompletableFutureTest exten
2415          for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2416      }}
2417  
2418 +    public void testApplyToEither_sourceCancelled2() {
2419 +        for (ExecutionMode m : ExecutionMode.values())
2420 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2421 +        for (boolean fFirst : new boolean[] { true, false })
2422 +        for (Integer v1 : new Integer[] { 1, null })
2423 +    {
2424 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2425 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2426 +        final IncFunction[] rs = new IncFunction[6];
2427 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2428 +
2429 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2430 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2431 +        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2432 +        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2433 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2434 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2435 +
2436 +        // unspecified behavior - both source completions available
2437 +        try {
2438 +            assertEquals(inc(v1), h0.join());
2439 +            rs[0].assertValue(inc(v1));
2440 +        } catch (CompletionException ok) {
2441 +            checkCompletedWithWrappedCancellationException(h0);
2442 +            rs[0].assertNotInvoked();
2443 +        }
2444 +        try {
2445 +            assertEquals(inc(v1), h1.join());
2446 +            rs[1].assertValue(inc(v1));
2447 +        } catch (CompletionException ok) {
2448 +            checkCompletedWithWrappedCancellationException(h1);
2449 +            rs[1].assertNotInvoked();
2450 +        }
2451 +        try {
2452 +            assertEquals(inc(v1), h2.join());
2453 +            rs[2].assertValue(inc(v1));
2454 +        } catch (CompletionException ok) {
2455 +            checkCompletedWithWrappedCancellationException(h2);
2456 +            rs[2].assertNotInvoked();
2457 +        }
2458 +        try {
2459 +            assertEquals(inc(v1), h3.join());
2460 +            rs[3].assertValue(inc(v1));
2461 +        } catch (CompletionException ok) {
2462 +            checkCompletedWithWrappedCancellationException(h3);
2463 +            rs[3].assertNotInvoked();
2464 +        }
2465 +
2466 +        checkCompletedNormally(f, v1);
2467 +        checkCancelled(g);
2468 +    }}
2469 +
2470      /**
2471       * applyToEither result completes exceptionally if action does
2472       */
# Line 1861 | Line 2485 | public class CompletableFutureTest exten
2485          f.complete(v1);
2486          final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2487          final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2488 <        checkCompletedWithWrappedCFException(h0);
2489 <        checkCompletedWithWrappedCFException(h1);
2490 <        checkCompletedWithWrappedCFException(h2);
2491 <        checkCompletedWithWrappedCFException(h3);
2488 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2489 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2490 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2491 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2492          for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2493  
2494          g.complete(v2);
# Line 1873 | Line 2497 | public class CompletableFutureTest exten
2497          final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2498          final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2499  
2500 <        checkCompletedWithWrappedCFException(h4);
2500 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2501          assertTrue(Objects.equals(v1, rs[4].value) ||
2502                     Objects.equals(v2, rs[4].value));
2503 <        checkCompletedWithWrappedCFException(h5);
2503 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2504          assertTrue(Objects.equals(v1, rs[5].value) ||
2505                     Objects.equals(v2, rs[5].value));
2506  
# Line 1957 | Line 2581 | public class CompletableFutureTest exten
2581          rs[0].assertNotInvoked();
2582          rs[1].assertNotInvoked();
2583          f.completeExceptionally(ex);
2584 <        checkCompletedWithWrappedCFException(h0, ex);
2585 <        checkCompletedWithWrappedCFException(h1, ex);
2584 >        checkCompletedWithWrappedException(h0, ex);
2585 >        checkCompletedWithWrappedException(h1, ex);
2586          final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2587          final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2588 <        checkCompletedWithWrappedCFException(h2, ex);
2589 <        checkCompletedWithWrappedCFException(h3, ex);
2588 >        checkCompletedWithWrappedException(h2, ex);
2589 >        checkCompletedWithWrappedException(h3, ex);
2590  
2591          g.complete(v1);
2592  
# Line 1973 | Line 2597 | public class CompletableFutureTest exten
2597              assertNull(h4.join());
2598              rs[4].assertValue(v1);
2599          } catch (CompletionException ok) {
2600 <            checkCompletedWithWrappedCFException(h4, ex);
2600 >            checkCompletedWithWrappedException(h4, ex);
2601              rs[4].assertNotInvoked();
2602          }
2603          try {
2604              assertNull(h5.join());
2605              rs[5].assertValue(v1);
2606          } catch (CompletionException ok) {
2607 <            checkCompletedWithWrappedCFException(h5, ex);
2607 >            checkCompletedWithWrappedException(h5, ex);
2608              rs[5].assertNotInvoked();
2609          }
2610  
2611 <        checkCompletedWithWrappedCFException(f, ex);
2611 >        checkCompletedExceptionally(f, ex);
2612          checkCompletedNormally(g, v1);
2613 <        checkCompletedWithWrappedCFException(h0, ex);
2614 <        checkCompletedWithWrappedCFException(h1, ex);
2615 <        checkCompletedWithWrappedCFException(h2, ex);
2616 <        checkCompletedWithWrappedCFException(h3, ex);
2617 <        checkCompletedWithWrappedCFException(h4, ex);
2613 >        checkCompletedWithWrappedException(h0, ex);
2614 >        checkCompletedWithWrappedException(h1, ex);
2615 >        checkCompletedWithWrappedException(h2, ex);
2616 >        checkCompletedWithWrappedException(h3, ex);
2617 >        checkCompletedWithWrappedException(h4, ex);
2618          for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2619      }}
2620  
2621 +    public void testAcceptEither_exceptionalCompletion2() {
2622 +        for (ExecutionMode m : ExecutionMode.values())
2623 +        for (boolean fFirst : new boolean[] { true, false })
2624 +        for (Integer v1 : new Integer[] { 1, null })
2625 +    {
2626 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2627 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2628 +        final CFException ex = new CFException();
2629 +        final NoopConsumer[] rs = new NoopConsumer[6];
2630 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2631 +
2632 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2633 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2634 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2635 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2636 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2637 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2638 +
2639 +        // unspecified behavior - both source completions available
2640 +        try {
2641 +            assertNull(h0.join());
2642 +            rs[0].assertValue(v1);
2643 +        } catch (CompletionException ok) {
2644 +            checkCompletedWithWrappedException(h0, ex);
2645 +            rs[0].assertNotInvoked();
2646 +        }
2647 +        try {
2648 +            assertNull(h1.join());
2649 +            rs[1].assertValue(v1);
2650 +        } catch (CompletionException ok) {
2651 +            checkCompletedWithWrappedException(h1, ex);
2652 +            rs[1].assertNotInvoked();
2653 +        }
2654 +        try {
2655 +            assertNull(h2.join());
2656 +            rs[2].assertValue(v1);
2657 +        } catch (CompletionException ok) {
2658 +            checkCompletedWithWrappedException(h2, ex);
2659 +            rs[2].assertNotInvoked();
2660 +        }
2661 +        try {
2662 +            assertNull(h3.join());
2663 +            rs[3].assertValue(v1);
2664 +        } catch (CompletionException ok) {
2665 +            checkCompletedWithWrappedException(h3, ex);
2666 +            rs[3].assertNotInvoked();
2667 +        }
2668 +
2669 +        checkCompletedNormally(f, v1);
2670 +        checkCompletedExceptionally(g, ex);
2671 +    }}
2672 +
2673      /**
2674       * acceptEither result completes exceptionally if either source cancelled
2675       */
# Line 2068 | Line 2744 | public class CompletableFutureTest exten
2744          f.complete(v1);
2745          final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2746          final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2747 <        checkCompletedWithWrappedCFException(h0);
2748 <        checkCompletedWithWrappedCFException(h1);
2749 <        checkCompletedWithWrappedCFException(h2);
2750 <        checkCompletedWithWrappedCFException(h3);
2747 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2748 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2749 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2750 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2751          for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2752  
2753          g.complete(v2);
# Line 2080 | Line 2756 | public class CompletableFutureTest exten
2756          final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2757          final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2758  
2759 <        checkCompletedWithWrappedCFException(h4);
2759 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2760          assertTrue(Objects.equals(v1, rs[4].value) ||
2761                     Objects.equals(v2, rs[4].value));
2762 <        checkCompletedWithWrappedCFException(h5);
2762 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2763          assertTrue(Objects.equals(v1, rs[5].value) ||
2764                     Objects.equals(v2, rs[5].value));
2765  
# Line 2095 | Line 2771 | public class CompletableFutureTest exten
2771       * runAfterEither result completes normally after normal completion
2772       * of either source
2773       */
2774 <    public void testRunAfterEither_normalCompletion1() {
2774 >    public void testRunAfterEither_normalCompletion() {
2775          for (ExecutionMode m : ExecutionMode.values())
2776          for (Integer v1 : new Integer[] { 1, null })
2777          for (Integer v2 : new Integer[] { 2, null })
2778 +        for (boolean pushNop : new boolean[] { true, false })
2779      {
2780          final CompletableFuture<Integer> f = new CompletableFuture<>();
2781          final CompletableFuture<Integer> g = new CompletableFuture<>();
2782 <        final Noop r = new Noop(m);
2783 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2782 >        final Noop[] rs = new Noop[6];
2783 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2784  
2785 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2786 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2787 +        checkIncomplete(h0);
2788 +        checkIncomplete(h1);
2789 +        rs[0].assertNotInvoked();
2790 +        rs[1].assertNotInvoked();
2791 +        if (pushNop) {          // ad hoc test of intra-completion interference
2792 +            m.thenRun(f, () -> {});
2793 +            m.thenRun(g, () -> {});
2794 +        }
2795          f.complete(v1);
2796 <        checkCompletedNormally(h, null);
2797 <        r.assertInvoked();
2798 <        g.complete(v2);
2799 <
2800 <        checkCompletedNormally(f, v1);
2801 <        checkCompletedNormally(g, v2);
2802 <        checkCompletedNormally(h, null);
2803 <        r.assertInvoked();
2804 <    }}
2805 <
2119 <    public void testRunAfterEither_normalCompletion2() {
2120 <        for (ExecutionMode m : ExecutionMode.values())
2121 <        for (Integer v1 : new Integer[] { 1, null })
2122 <        for (Integer v2 : new Integer[] { 2, null })
2123 <    {
2124 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2125 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2126 <        final Noop r = new Noop(m);
2127 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2796 >        checkCompletedNormally(h0, null);
2797 >        checkCompletedNormally(h1, null);
2798 >        rs[0].assertInvoked();
2799 >        rs[1].assertInvoked();
2800 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2801 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2802 >        checkCompletedNormally(h2, null);
2803 >        checkCompletedNormally(h3, null);
2804 >        rs[2].assertInvoked();
2805 >        rs[3].assertInvoked();
2806  
2807          g.complete(v2);
2130        checkCompletedNormally(h, null);
2131        r.assertInvoked();
2132        f.complete(v1);
2133
2134        checkCompletedNormally(f, v1);
2135        checkCompletedNormally(g, v2);
2136        checkCompletedNormally(h, null);
2137        r.assertInvoked();
2138        }}
2139
2140    public void testRunAfterEither_normalCompletion3() {
2141        for (ExecutionMode m : ExecutionMode.values())
2142        for (Integer v1 : new Integer[] { 1, null })
2143        for (Integer v2 : new Integer[] { 2, null })
2144    {
2145        final CompletableFuture<Integer> f = new CompletableFuture<>();
2146        final CompletableFuture<Integer> g = new CompletableFuture<>();
2147        final Noop r = new Noop(m);
2808  
2809 <        f.complete(v1);
2810 <        g.complete(v2);
2151 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2809 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2810 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2811  
2153        checkCompletedNormally(h, null);
2812          checkCompletedNormally(f, v1);
2813          checkCompletedNormally(g, v2);
2814 <        r.assertInvoked();
2814 >        checkCompletedNormally(h0, null);
2815 >        checkCompletedNormally(h1, null);
2816 >        checkCompletedNormally(h2, null);
2817 >        checkCompletedNormally(h3, null);
2818 >        checkCompletedNormally(h4, null);
2819 >        checkCompletedNormally(h5, null);
2820 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2821      }}
2822  
2823      /**
2824       * runAfterEither result completes exceptionally after exceptional
2825       * completion of either source
2826       */
2827 <    public void testRunAfterEither_exceptionalCompletion1() {
2827 >    public void testRunAfterEither_exceptionalCompletion() {
2828          for (ExecutionMode m : ExecutionMode.values())
2829          for (Integer v1 : new Integer[] { 1, null })
2830      {
2831          final CompletableFuture<Integer> f = new CompletableFuture<>();
2832          final CompletableFuture<Integer> g = new CompletableFuture<>();
2169        final Noop r = new Noop(m);
2170        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2833          final CFException ex = new CFException();
2834 +        final Noop[] rs = new Noop[6];
2835 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2836  
2837 <        f.completeExceptionally(ex);
2838 <        checkCompletedWithWrappedCFException(h, ex);
2839 <        g.complete(v1);
2840 <
2841 <        r.assertNotInvoked();
2842 <        checkCompletedNormally(g, v1);
2843 <        checkCompletedWithWrappedCFException(f, ex);
2844 <        checkCompletedWithWrappedCFException(h, ex);
2845 <    }}
2837 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2838 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2839 >        checkIncomplete(h0);
2840 >        checkIncomplete(h1);
2841 >        rs[0].assertNotInvoked();
2842 >        rs[1].assertNotInvoked();
2843 >        assertTrue(f.completeExceptionally(ex));
2844 >        checkCompletedWithWrappedException(h0, ex);
2845 >        checkCompletedWithWrappedException(h1, ex);
2846 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2847 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2848 >        checkCompletedWithWrappedException(h2, ex);
2849 >        checkCompletedWithWrappedException(h3, ex);
2850  
2851 <    public void testRunAfterEither_exceptionalCompletion2() {
2184 <        for (ExecutionMode m : ExecutionMode.values())
2185 <        for (Integer v1 : new Integer[] { 1, null })
2186 <    {
2187 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2188 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2189 <        final Noop r = new Noop(m);
2190 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2191 <        final CFException ex = new CFException();
2851 >        assertTrue(g.complete(v1));
2852  
2853 <        g.completeExceptionally(ex);
2854 <        checkCompletedWithWrappedCFException(h, ex);
2855 <        f.complete(v1);
2853 >        // unspecified behavior - both source completions available
2854 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2855 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2856 >        try {
2857 >            assertNull(h4.join());
2858 >            rs[4].assertInvoked();
2859 >        } catch (CompletionException ok) {
2860 >            checkCompletedWithWrappedException(h4, ex);
2861 >            rs[4].assertNotInvoked();
2862 >        }
2863 >        try {
2864 >            assertNull(h5.join());
2865 >            rs[5].assertInvoked();
2866 >        } catch (CompletionException ok) {
2867 >            checkCompletedWithWrappedException(h5, ex);
2868 >            rs[5].assertNotInvoked();
2869 >        }
2870  
2871 <        r.assertNotInvoked();
2872 <        checkCompletedNormally(f, v1);
2873 <        checkCompletedWithWrappedCFException(g, ex);
2874 <        checkCompletedWithWrappedCFException(h, ex);
2871 >        checkCompletedExceptionally(f, ex);
2872 >        checkCompletedNormally(g, v1);
2873 >        checkCompletedWithWrappedException(h0, ex);
2874 >        checkCompletedWithWrappedException(h1, ex);
2875 >        checkCompletedWithWrappedException(h2, ex);
2876 >        checkCompletedWithWrappedException(h3, ex);
2877 >        checkCompletedWithWrappedException(h4, ex);
2878 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2879      }}
2880  
2881 <    public void testRunAfterEither_exceptionalCompletion3() {
2881 >    public void testRunAfterEither_exceptionalCompletion2() {
2882          for (ExecutionMode m : ExecutionMode.values())
2883 +        for (boolean fFirst : new boolean[] { true, false })
2884          for (Integer v1 : new Integer[] { 1, null })
2885      {
2886          final CompletableFuture<Integer> f = new CompletableFuture<>();
2887          final CompletableFuture<Integer> g = new CompletableFuture<>();
2209        final Noop r = new Noop(m);
2888          final CFException ex = new CFException();
2889 +        final Noop[] rs = new Noop[6];
2890 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2891  
2892 <        g.completeExceptionally(ex);
2893 <        f.complete(v1);
2894 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2892 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2893 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2894 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2895 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2896 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2897 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2898  
2899 <        // unspecified behavior
2900 <        Integer v;
2899 >        // unspecified behavior - both source completions available
2900 >        try {
2901 >            assertNull(h0.join());
2902 >            rs[0].assertInvoked();
2903 >        } catch (CompletionException ok) {
2904 >            checkCompletedWithWrappedException(h0, ex);
2905 >            rs[0].assertNotInvoked();
2906 >        }
2907 >        try {
2908 >            assertNull(h1.join());
2909 >            rs[1].assertInvoked();
2910 >        } catch (CompletionException ok) {
2911 >            checkCompletedWithWrappedException(h1, ex);
2912 >            rs[1].assertNotInvoked();
2913 >        }
2914 >        try {
2915 >            assertNull(h2.join());
2916 >            rs[2].assertInvoked();
2917 >        } catch (CompletionException ok) {
2918 >            checkCompletedWithWrappedException(h2, ex);
2919 >            rs[2].assertNotInvoked();
2920 >        }
2921          try {
2922 <            assertNull(h.join());
2923 <            r.assertInvoked();
2922 >            assertNull(h3.join());
2923 >            rs[3].assertInvoked();
2924          } catch (CompletionException ok) {
2925 <            checkCompletedWithWrappedCFException(h, ex);
2926 <            r.assertNotInvoked();
2925 >            checkCompletedWithWrappedException(h3, ex);
2926 >            rs[3].assertNotInvoked();
2927          }
2928  
2226        checkCompletedWithWrappedCFException(g, ex);
2929          checkCompletedNormally(f, v1);
2930 +        checkCompletedExceptionally(g, ex);
2931      }}
2932  
2933 <    public void testRunAfterEither_exceptionalCompletion4() {
2933 >    /**
2934 >     * runAfterEither result completes exceptionally if either source cancelled
2935 >     */
2936 >    public void testRunAfterEither_sourceCancelled() {
2937          for (ExecutionMode m : ExecutionMode.values())
2938 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2939          for (Integer v1 : new Integer[] { 1, null })
2940      {
2941          final CompletableFuture<Integer> f = new CompletableFuture<>();
2942          final CompletableFuture<Integer> g = new CompletableFuture<>();
2943 <        final Noop r = new Noop(m);
2944 <        final CFException ex = new CFException();
2943 >        final Noop[] rs = new Noop[6];
2944 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2945  
2946 <        f.completeExceptionally(ex);
2947 <        g.complete(v1);
2948 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2946 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2947 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2948 >        checkIncomplete(h0);
2949 >        checkIncomplete(h1);
2950 >        rs[0].assertNotInvoked();
2951 >        rs[1].assertNotInvoked();
2952 >        f.cancel(mayInterruptIfRunning);
2953 >        checkCompletedWithWrappedCancellationException(h0);
2954 >        checkCompletedWithWrappedCancellationException(h1);
2955 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2956 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2957 >        checkCompletedWithWrappedCancellationException(h2);
2958 >        checkCompletedWithWrappedCancellationException(h3);
2959 >
2960 >        assertTrue(g.complete(v1));
2961  
2962 <        // unspecified behavior
2963 <        Integer v;
2962 >        // unspecified behavior - both source completions available
2963 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2964 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2965 >        try {
2966 >            assertNull(h4.join());
2967 >            rs[4].assertInvoked();
2968 >        } catch (CompletionException ok) {
2969 >            checkCompletedWithWrappedCancellationException(h4);
2970 >            rs[4].assertNotInvoked();
2971 >        }
2972          try {
2973 <            assertNull(h.join());
2974 <            r.assertInvoked();
2973 >            assertNull(h5.join());
2974 >            rs[5].assertInvoked();
2975          } catch (CompletionException ok) {
2976 <            checkCompletedWithWrappedCFException(h, ex);
2977 <            r.assertNotInvoked();
2976 >            checkCompletedWithWrappedCancellationException(h5);
2977 >            rs[5].assertNotInvoked();
2978          }
2979  
2980 <        checkCompletedWithWrappedCFException(f, ex);
2980 >        checkCancelled(f);
2981          checkCompletedNormally(g, v1);
2982 +        checkCompletedWithWrappedCancellationException(h0);
2983 +        checkCompletedWithWrappedCancellationException(h1);
2984 +        checkCompletedWithWrappedCancellationException(h2);
2985 +        checkCompletedWithWrappedCancellationException(h3);
2986 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2987      }}
2988  
2989      /**
2990       * runAfterEither result completes exceptionally if action does
2991       */
2992 <    public void testRunAfterEither_actionFailed1() {
2992 >    public void testRunAfterEither_actionFailed() {
2993          for (ExecutionMode m : ExecutionMode.values())
2994          for (Integer v1 : new Integer[] { 1, null })
2995          for (Integer v2 : new Integer[] { 2, null })
2996      {
2997          final CompletableFuture<Integer> f = new CompletableFuture<>();
2998          final CompletableFuture<Integer> g = new CompletableFuture<>();
2999 <        final FailingRunnable r = new FailingRunnable(m);
3000 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2999 >        final FailingRunnable[] rs = new FailingRunnable[6];
3000 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
3001 >
3002 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
3003 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
3004 >        assertTrue(f.complete(v1));
3005 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
3006 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
3007 >        checkCompletedWithWrappedException(h0, rs[0].ex);
3008 >        checkCompletedWithWrappedException(h1, rs[1].ex);
3009 >        checkCompletedWithWrappedException(h2, rs[2].ex);
3010 >        checkCompletedWithWrappedException(h3, rs[3].ex);
3011 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
3012 >        assertTrue(g.complete(v2));
3013 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
3014 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
3015 >        checkCompletedWithWrappedException(h4, rs[4].ex);
3016 >        checkCompletedWithWrappedException(h5, rs[5].ex);
3017  
2270        f.complete(v1);
2271        checkCompletedWithWrappedCFException(h);
2272        g.complete(v2);
3018          checkCompletedNormally(f, v1);
3019          checkCompletedNormally(g, v2);
3020 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
3021      }}
3022  
3023 <    public void testRunAfterEither_actionFailed2() {
3023 >    /**
3024 >     * thenCompose result completes normally after normal completion of source
3025 >     */
3026 >    public void testThenCompose_normalCompletion() {
3027          for (ExecutionMode m : ExecutionMode.values())
3028 +        for (boolean createIncomplete : new boolean[] { true, false })
3029          for (Integer v1 : new Integer[] { 1, null })
2280        for (Integer v2 : new Integer[] { 2, null })
3030      {
3031          final CompletableFuture<Integer> f = new CompletableFuture<>();
3032 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
3033 <        final FailingRunnable r = new FailingRunnable(m);
3034 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
3032 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3033 >        if (!createIncomplete) assertTrue(f.complete(v1));
3034 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3035 >        if (createIncomplete) assertTrue(f.complete(v1));
3036  
3037 <        g.complete(v2);
2288 <        checkCompletedWithWrappedCFException(h);
2289 <        f.complete(v1);
3037 >        checkCompletedNormally(g, inc(v1));
3038          checkCompletedNormally(f, v1);
3039 <        checkCompletedNormally(g, v2);
3039 >        r.assertValue(v1);
3040      }}
3041  
3042      /**
3043 <     * runAfterEither result completes exceptionally if either source cancelled
3043 >     * thenCompose result completes exceptionally after exceptional
3044 >     * completion of source
3045       */
3046 <    public void testRunAfterEither_sourceCancelled1() {
3046 >    public void testThenCompose_exceptionalCompletion() {
3047          for (ExecutionMode m : ExecutionMode.values())
3048 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2300 <        for (Integer v1 : new Integer[] { 1, null })
3048 >        for (boolean createIncomplete : new boolean[] { true, false })
3049      {
3050 +        final CFException ex = new CFException();
3051 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3052          final CompletableFuture<Integer> f = new CompletableFuture<>();
3053 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
3054 <        final Noop r = new Noop(m);
3055 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2306 <
2307 <        assertTrue(f.cancel(mayInterruptIfRunning));
2308 <        checkCompletedWithWrappedCancellationException(h);
2309 <        g.complete(v1);
3053 >        if (!createIncomplete) f.completeExceptionally(ex);
3054 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3055 >        if (createIncomplete) f.completeExceptionally(ex);
3056  
3057 <        checkCancelled(f);
3057 >        checkCompletedWithWrappedException(g, ex);
3058 >        checkCompletedExceptionally(f, ex);
3059          r.assertNotInvoked();
2313        checkCompletedNormally(g, v1);
2314        checkCompletedWithWrappedCancellationException(h);
3060      }}
3061  
3062 <    public void testRunAfterEither_sourceCancelled2() {
3062 >    /**
3063 >     * thenCompose result completes exceptionally if action does
3064 >     */
3065 >    public void testThenCompose_actionFailed() {
3066          for (ExecutionMode m : ExecutionMode.values())
3067 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3067 >        for (boolean createIncomplete : new boolean[] { true, false })
3068          for (Integer v1 : new Integer[] { 1, null })
3069      {
3070          final CompletableFuture<Integer> f = new CompletableFuture<>();
3071 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
3072 <        final Noop r = new Noop(m);
3073 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
3074 <
3075 <        assertTrue(g.cancel(mayInterruptIfRunning));
2328 <        checkCompletedWithWrappedCancellationException(h);
2329 <        f.complete(v1);
3071 >        final FailingCompletableFutureFunction r
3072 >            = new FailingCompletableFutureFunction(m);
3073 >        if (!createIncomplete) assertTrue(f.complete(v1));
3074 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3075 >        if (createIncomplete) assertTrue(f.complete(v1));
3076  
3077 <        checkCancelled(g);
2332 <        r.assertNotInvoked();
3077 >        checkCompletedWithWrappedException(g, r.ex);
3078          checkCompletedNormally(f, v1);
2334        checkCompletedWithWrappedCancellationException(h);
3079      }}
3080  
3081 <    public void testRunAfterEither_sourceCancelled3() {
3081 >    /**
3082 >     * thenCompose result completes exceptionally if source cancelled
3083 >     */
3084 >    public void testThenCompose_sourceCancelled() {
3085          for (ExecutionMode m : ExecutionMode.values())
3086 +        for (boolean createIncomplete : new boolean[] { true, false })
3087          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2340        for (Integer v1 : new Integer[] { 1, null })
3088      {
3089          final CompletableFuture<Integer> f = new CompletableFuture<>();
3090 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
3091 <        final Noop r = new Noop(m);
3092 <
3093 <        assertTrue(g.cancel(mayInterruptIfRunning));
3094 <        f.complete(v1);
3095 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2349 <
2350 <        // unspecified behavior
2351 <        Integer v;
2352 <        try {
2353 <            assertNull(h.join());
2354 <            r.assertInvoked();
2355 <        } catch (CompletionException ok) {
2356 <            checkCompletedWithWrappedCancellationException(h);
2357 <            r.assertNotInvoked();
3090 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3091 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3092 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3093 >        if (createIncomplete) {
3094 >            checkIncomplete(g);
3095 >            assertTrue(f.cancel(mayInterruptIfRunning));
3096          }
3097  
3098 <        checkCancelled(g);
3099 <        checkCompletedNormally(f, v1);
3098 >        checkCompletedWithWrappedCancellationException(g);
3099 >        checkCancelled(f);
3100      }}
3101  
3102 <    public void testRunAfterEither_sourceCancelled4() {
3102 >    /**
3103 >     * thenCompose result completes exceptionally if the result of the action does
3104 >     */
3105 >    public void testThenCompose_actionReturnsFailingFuture() {
3106          for (ExecutionMode m : ExecutionMode.values())
3107 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3107 >        for (int order = 0; order < 6; order++)
3108          for (Integer v1 : new Integer[] { 1, null })
3109      {
3110 +        final CFException ex = new CFException();
3111          final CompletableFuture<Integer> f = new CompletableFuture<>();
3112          final CompletableFuture<Integer> g = new CompletableFuture<>();
3113 <        final Noop r = new Noop(m);
3114 <
3115 <        assertTrue(f.cancel(mayInterruptIfRunning));
3116 <        g.complete(v1);
3117 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
3118 <
3119 <        // unspecified behavior
3120 <        Integer v;
3121 <        try {
3122 <            assertNull(h.join());
3123 <            r.assertInvoked();
3124 <        } catch (CompletionException ok) {
3125 <            checkCompletedWithWrappedCancellationException(h);
3126 <            r.assertNotInvoked();
3113 >        final CompletableFuture<Integer> h;
3114 >        // Test all permutations of orders
3115 >        switch (order) {
3116 >        case 0:
3117 >            assertTrue(f.complete(v1));
3118 >            assertTrue(g.completeExceptionally(ex));
3119 >            h = m.thenCompose(f, (x -> g));
3120 >            break;
3121 >        case 1:
3122 >            assertTrue(f.complete(v1));
3123 >            h = m.thenCompose(f, (x -> g));
3124 >            assertTrue(g.completeExceptionally(ex));
3125 >            break;
3126 >        case 2:
3127 >            assertTrue(g.completeExceptionally(ex));
3128 >            assertTrue(f.complete(v1));
3129 >            h = m.thenCompose(f, (x -> g));
3130 >            break;
3131 >        case 3:
3132 >            assertTrue(g.completeExceptionally(ex));
3133 >            h = m.thenCompose(f, (x -> g));
3134 >            assertTrue(f.complete(v1));
3135 >            break;
3136 >        case 4:
3137 >            h = m.thenCompose(f, (x -> g));
3138 >            assertTrue(f.complete(v1));
3139 >            assertTrue(g.completeExceptionally(ex));
3140 >            break;
3141 >        case 5:
3142 >            h = m.thenCompose(f, (x -> g));
3143 >            assertTrue(f.complete(v1));
3144 >            assertTrue(g.completeExceptionally(ex));
3145 >            break;
3146 >        default: throw new AssertionError();
3147          }
3148  
3149 <        checkCancelled(f);
3150 <        checkCompletedNormally(g, v1);
3149 >        checkCompletedExceptionally(g, ex);
3150 >        checkCompletedWithWrappedException(h, ex);
3151 >        checkCompletedNormally(f, v1);
3152      }}
3153  
3154      /**
3155 <     * thenCompose result completes normally after normal completion of source
3155 >     * exceptionallyCompose result completes normally after normal
3156 >     * completion of source
3157       */
3158 <    public void testThenCompose_normalCompletion() {
3158 >    public void testExceptionallyCompose_normalCompletion() {
3159          for (ExecutionMode m : ExecutionMode.values())
3160          for (boolean createIncomplete : new boolean[] { true, false })
3161          for (Integer v1 : new Integer[] { 1, null })
3162      {
3163          final CompletableFuture<Integer> f = new CompletableFuture<>();
3164 <        final CompletableFutureInc r = new CompletableFutureInc(m);
3165 <        if (!createIncomplete) f.complete(v1);
3166 <        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3167 <        if (createIncomplete) f.complete(v1);
3164 >        final ExceptionalCompletableFutureFunction r =
3165 >            new ExceptionalCompletableFutureFunction(m);
3166 >        if (!createIncomplete) assertTrue(f.complete(v1));
3167 >        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3168 >        if (createIncomplete) assertTrue(f.complete(v1));
3169 >
3170 >        if (!createIncomplete && testImplementationDetails)
3171 >            assertSame(f, g);   // an optimization
3172  
2405        checkCompletedNormally(g, inc(v1));
3173          checkCompletedNormally(f, v1);
3174 <        r.assertInvoked();
3174 >        checkCompletedNormally(g, v1);
3175 >        r.assertNotInvoked();
3176      }}
3177  
3178      /**
3179 <     * thenCompose result completes exceptionally after exceptional
3179 >     * exceptionallyCompose result completes normally after exceptional
3180       * completion of source
3181       */
3182 <    public void testThenCompose_exceptionalCompletion() {
3182 >    public void testExceptionallyCompose_exceptionalCompletion() {
3183          for (ExecutionMode m : ExecutionMode.values())
3184          for (boolean createIncomplete : new boolean[] { true, false })
3185      {
3186          final CFException ex = new CFException();
3187 <        final CompletableFutureInc r = new CompletableFutureInc(m);
3187 >        final ExceptionalCompletableFutureFunction r =
3188 >            new ExceptionalCompletableFutureFunction(m);
3189          final CompletableFuture<Integer> f = new CompletableFuture<>();
3190          if (!createIncomplete) f.completeExceptionally(ex);
3191 <        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3191 >        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3192          if (createIncomplete) f.completeExceptionally(ex);
3193  
3194 <        checkCompletedWithWrappedCFException(g, ex);
3195 <        checkCompletedWithWrappedCFException(f, ex);
3196 <        r.assertNotInvoked();
3194 >        checkCompletedExceptionally(f, ex);
3195 >        checkCompletedNormally(g, r.value);
3196 >        r.assertInvoked();
3197      }}
3198  
3199      /**
3200 <     * thenCompose result completes exceptionally if action does
3200 >     * exceptionallyCompose completes exceptionally on exception if action does
3201       */
3202 <    public void testThenCompose_actionFailed() {
3202 >    public void testExceptionallyCompose_actionFailed() {
3203          for (ExecutionMode m : ExecutionMode.values())
3204          for (boolean createIncomplete : new boolean[] { true, false })
3205          for (Integer v1 : new Integer[] { 1, null })
3206      {
3207 +        final CFException ex = new CFException();
3208          final CompletableFuture<Integer> f = new CompletableFuture<>();
3209 <        final FailingCompletableFutureFunction r
3210 <            = new FailingCompletableFutureFunction(m);
3211 <        if (!createIncomplete) f.complete(v1);
3212 <        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3213 <        if (createIncomplete) f.complete(v1);
3209 >        final FailingExceptionalCompletableFutureFunction r
3210 >            = new FailingExceptionalCompletableFutureFunction(m);
3211 >        if (!createIncomplete) f.completeExceptionally(ex);
3212 >        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3213 >        if (createIncomplete) f.completeExceptionally(ex);
3214  
3215 <        checkCompletedWithWrappedCFException(g);
3216 <        checkCompletedNormally(f, v1);
3215 >        checkCompletedExceptionally(f, ex);
3216 >        checkCompletedWithWrappedException(g, r.ex);
3217 >        r.assertInvoked();
3218      }}
3219  
3220      /**
3221 <     * thenCompose result completes exceptionally if source cancelled
3221 >     * thenComposeExceptionally result completes exceptionally if the
3222 >     * result of the action does
3223       */
3224 <    public void testThenCompose_sourceCancelled() {
3224 >    public void testExceptionallyCompose_actionReturnsFailingFuture() {
3225          for (ExecutionMode m : ExecutionMode.values())
3226 <        for (boolean createIncomplete : new boolean[] { true, false })
3227 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3226 >        for (int order = 0; order < 6; order++)
3227 >        for (Integer v1 : new Integer[] { 1, null })
3228      {
3229 +        final CFException ex0 = new CFException();
3230 +        final CFException ex = new CFException();
3231          final CompletableFuture<Integer> f = new CompletableFuture<>();
3232 <        final CompletableFutureInc r = new CompletableFutureInc(m);
3233 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3234 <        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3235 <        if (createIncomplete) {
3236 <            checkIncomplete(g);
3237 <            assertTrue(f.cancel(mayInterruptIfRunning));
3232 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3233 >        final CompletableFuture<Integer> h;
3234 >        // Test all permutations of orders
3235 >        switch (order) {
3236 >        case 0:
3237 >            assertTrue(f.completeExceptionally(ex0));
3238 >            assertTrue(g.completeExceptionally(ex));
3239 >            h = m.exceptionallyCompose(f, (x -> g));
3240 >            break;
3241 >        case 1:
3242 >            assertTrue(f.completeExceptionally(ex0));
3243 >            h = m.exceptionallyCompose(f, (x -> g));
3244 >            assertTrue(g.completeExceptionally(ex));
3245 >            break;
3246 >        case 2:
3247 >            assertTrue(g.completeExceptionally(ex));
3248 >            assertTrue(f.completeExceptionally(ex0));
3249 >            h = m.exceptionallyCompose(f, (x -> g));
3250 >            break;
3251 >        case 3:
3252 >            assertTrue(g.completeExceptionally(ex));
3253 >            h = m.exceptionallyCompose(f, (x -> g));
3254 >            assertTrue(f.completeExceptionally(ex0));
3255 >            break;
3256 >        case 4:
3257 >            h = m.exceptionallyCompose(f, (x -> g));
3258 >            assertTrue(f.completeExceptionally(ex0));
3259 >            assertTrue(g.completeExceptionally(ex));
3260 >            break;
3261 >        case 5:
3262 >            h = m.exceptionallyCompose(f, (x -> g));
3263 >            assertTrue(f.completeExceptionally(ex0));
3264 >            assertTrue(g.completeExceptionally(ex));
3265 >            break;
3266 >        default: throw new AssertionError();
3267          }
3268  
3269 <        checkCompletedWithWrappedCancellationException(g);
3270 <        checkCancelled(f);
3269 >        checkCompletedExceptionally(g, ex);
3270 >
3271 >        // TODO: should this be: checkCompletedWithWrappedException(h, ex);
3272 >        try {
3273 >            h.join();
3274 >            shouldThrow();
3275 >        } catch (Throwable t) {
3276 >            assertSame(ex, (t instanceof CompletionException) ? t.getCause() : t);
3277 >        }
3278 >
3279 >        checkCompletedExceptionally(f, ex0);
3280      }}
3281  
3282      // other static methods
# Line 2483 | Line 3295 | public class CompletableFutureTest exten
3295       * when all components complete normally
3296       */
3297      public void testAllOf_normal() throws Exception {
3298 <        for (int k = 1; k < 20; ++k) {
3298 >        for (int k = 1; k < 10; k++) {
3299              CompletableFuture<Integer>[] fs
3300                  = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3301 <            for (int i = 0; i < k; ++i)
3301 >            for (int i = 0; i < k; i++)
3302                  fs[i] = new CompletableFuture<>();
3303              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3304 <            for (int i = 0; i < k; ++i) {
3304 >            for (int i = 0; i < k; i++) {
3305                  checkIncomplete(f);
3306                  checkIncomplete(CompletableFuture.allOf(fs));
3307                  fs[i].complete(one);
# Line 2499 | Line 3311 | public class CompletableFutureTest exten
3311          }
3312      }
3313  
3314 <    public void testAllOf_backwards() throws Exception {
3315 <        for (int k = 1; k < 20; ++k) {
3314 >    public void testAllOf_normal_backwards() throws Exception {
3315 >        for (int k = 1; k < 10; k++) {
3316              CompletableFuture<Integer>[] fs
3317                  = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3318 <            for (int i = 0; i < k; ++i)
3318 >            for (int i = 0; i < k; i++)
3319                  fs[i] = new CompletableFuture<>();
3320              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3321              for (int i = k - 1; i >= 0; i--) {
# Line 2516 | Line 3328 | public class CompletableFutureTest exten
3328          }
3329      }
3330  
3331 +    public void testAllOf_exceptional() throws Exception {
3332 +        for (int k = 1; k < 10; k++) {
3333 +            CompletableFuture<Integer>[] fs
3334 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3335 +            CFException ex = new CFException();
3336 +            for (int i = 0; i < k; i++)
3337 +                fs[i] = new CompletableFuture<>();
3338 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3339 +            for (int i = 0; i < k; i++) {
3340 +                checkIncomplete(f);
3341 +                checkIncomplete(CompletableFuture.allOf(fs));
3342 +                if (i != k / 2) {
3343 +                    fs[i].complete(i);
3344 +                    checkCompletedNormally(fs[i], i);
3345 +                } else {
3346 +                    fs[i].completeExceptionally(ex);
3347 +                    checkCompletedExceptionally(fs[i], ex);
3348 +                }
3349 +            }
3350 +            checkCompletedWithWrappedException(f, ex);
3351 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3352 +        }
3353 +    }
3354 +
3355      /**
3356       * anyOf(no component futures) returns an incomplete future
3357       */
3358      public void testAnyOf_empty() throws Exception {
3359 +        for (Integer v1 : new Integer[] { 1, null })
3360 +    {
3361          CompletableFuture<Object> f = CompletableFuture.anyOf();
3362          checkIncomplete(f);
3363 <    }
3363 >
3364 >        f.complete(v1);
3365 >        checkCompletedNormally(f, v1);
3366 >    }}
3367  
3368      /**
3369       * anyOf returns a future completed normally with a value when
3370       * a component future does
3371       */
3372      public void testAnyOf_normal() throws Exception {
3373 <        for (int k = 0; k < 10; ++k) {
3373 >        for (int k = 0; k < 10; k++) {
3374              CompletableFuture[] fs = new CompletableFuture[k];
3375 <            for (int i = 0; i < k; ++i)
3375 >            for (int i = 0; i < k; i++)
3376                  fs[i] = new CompletableFuture<>();
3377              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3378              checkIncomplete(f);
3379 <            for (int i = 0; i < k; ++i) {
3380 <                fs[i].complete(one);
3381 <                checkCompletedNormally(f, one);
3382 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3379 >            for (int i = 0; i < k; i++) {
3380 >                fs[i].complete(i);
3381 >                checkCompletedNormally(f, 0);
3382 >                int x = (int) CompletableFuture.anyOf(fs).join();
3383 >                assertTrue(0 <= x && x <= i);
3384 >            }
3385 >        }
3386 >    }
3387 >    public void testAnyOf_normal_backwards() throws Exception {
3388 >        for (int k = 0; k < 10; k++) {
3389 >            CompletableFuture[] fs = new CompletableFuture[k];
3390 >            for (int i = 0; i < k; i++)
3391 >                fs[i] = new CompletableFuture<>();
3392 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3393 >            checkIncomplete(f);
3394 >            for (int i = k - 1; i >= 0; i--) {
3395 >                fs[i].complete(i);
3396 >                checkCompletedNormally(f, k - 1);
3397 >                int x = (int) CompletableFuture.anyOf(fs).join();
3398 >                assertTrue(i <= x && x <= k - 1);
3399              }
3400          }
3401      }
# Line 2547 | Line 3404 | public class CompletableFutureTest exten
3404       * anyOf result completes exceptionally when any component does.
3405       */
3406      public void testAnyOf_exceptional() throws Exception {
3407 <        for (int k = 0; k < 10; ++k) {
3407 >        for (int k = 0; k < 10; k++) {
3408 >            CompletableFuture[] fs = new CompletableFuture[k];
3409 >            CFException[] exs = new CFException[k];
3410 >            for (int i = 0; i < k; i++) {
3411 >                fs[i] = new CompletableFuture<>();
3412 >                exs[i] = new CFException();
3413 >            }
3414 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3415 >            checkIncomplete(f);
3416 >            for (int i = 0; i < k; i++) {
3417 >                fs[i].completeExceptionally(exs[i]);
3418 >                checkCompletedWithWrappedException(f, exs[0]);
3419 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3420 >            }
3421 >        }
3422 >    }
3423 >
3424 >    public void testAnyOf_exceptional_backwards() throws Exception {
3425 >        for (int k = 0; k < 10; k++) {
3426              CompletableFuture[] fs = new CompletableFuture[k];
3427 <            for (int i = 0; i < k; ++i)
3427 >            CFException[] exs = new CFException[k];
3428 >            for (int i = 0; i < k; i++) {
3429                  fs[i] = new CompletableFuture<>();
3430 +                exs[i] = new CFException();
3431 +            }
3432              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3433              checkIncomplete(f);
3434 <            for (int i = 0; i < k; ++i) {
3435 <                fs[i].completeExceptionally(new CFException());
3436 <                checkCompletedWithWrappedCFException(f);
3434 >            for (int i = k - 1; i >= 0; i--) {
3435 >                fs[i].completeExceptionally(exs[i]);
3436 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3437                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3438              }
3439          }
# Line 2564 | Line 3442 | public class CompletableFutureTest exten
3442      /**
3443       * Completion methods throw NullPointerException with null arguments
3444       */
3445 +    @SuppressWarnings("FutureReturnValueIgnored")
3446      public void testNPE() {
3447          CompletableFuture<Integer> f = new CompletableFuture<>();
3448          CompletableFuture<Integer> g = new CompletableFuture<>();
3449          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
2571        CompletableFuture<?> h;
3450          ThreadExecutor exec = new ThreadExecutor();
3451  
3452          Runnable[] throwingActions = {
3453              () -> CompletableFuture.supplyAsync(null),
3454              () -> CompletableFuture.supplyAsync(null, exec),
3455 <            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.DEFAULT, 42), null),
3455 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3456  
3457              () -> CompletableFuture.runAsync(null),
3458              () -> CompletableFuture.runAsync(null, exec),
# Line 2584 | Line 3462 | public class CompletableFutureTest exten
3462  
3463              () -> f.thenApply(null),
3464              () -> f.thenApplyAsync(null),
3465 <            () -> f.thenApplyAsync((x) -> x, null),
3465 >            () -> f.thenApplyAsync(x -> x, null),
3466              () -> f.thenApplyAsync(null, exec),
3467  
3468              () -> f.thenAccept(null),
3469              () -> f.thenAcceptAsync(null),
3470 <            () -> f.thenAcceptAsync((x) -> {} , null),
3470 >            () -> f.thenAcceptAsync(x -> {} , null),
3471              () -> f.thenAcceptAsync(null, exec),
3472  
3473              () -> f.thenRun(null),
# Line 2624 | Line 3502 | public class CompletableFutureTest exten
3502              () -> f.applyToEither(g, null),
3503              () -> f.applyToEitherAsync(g, null),
3504              () -> f.applyToEitherAsync(g, null, exec),
3505 <            () -> f.applyToEither(nullFuture, (x) -> x),
3506 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3507 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3508 <            () -> f.applyToEitherAsync(g, (x) -> x, null),
3505 >            () -> f.applyToEither(nullFuture, x -> x),
3506 >            () -> f.applyToEitherAsync(nullFuture, x -> x),
3507 >            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3508 >            () -> f.applyToEitherAsync(g, x -> x, null),
3509  
3510              () -> f.acceptEither(g, null),
3511              () -> f.acceptEitherAsync(g, null),
3512              () -> f.acceptEitherAsync(g, null, exec),
3513 <            () -> f.acceptEither(nullFuture, (x) -> {}),
3514 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3515 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3516 <            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3513 >            () -> f.acceptEither(nullFuture, x -> {}),
3514 >            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3515 >            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3516 >            () -> f.acceptEitherAsync(g, x -> {}, null),
3517  
3518              () -> f.runAfterEither(g, null),
3519              () -> f.runAfterEitherAsync(g, null),
# Line 2665 | Line 3543 | public class CompletableFutureTest exten
3543              () -> CompletableFuture.anyOf(null, f),
3544  
3545              () -> f.obtrudeException(null),
3546 +
3547 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3548 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3549 +            () -> CompletableFuture.delayedExecutor(1L, null),
3550 +
3551 +            () -> f.orTimeout(1L, null),
3552 +            () -> f.completeOnTimeout(42, 1L, null),
3553 +
3554 +            () -> CompletableFuture.failedFuture(null),
3555 +            () -> CompletableFuture.failedStage(null),
3556          };
3557  
3558          assertThrows(NullPointerException.class, throwingActions);
# Line 2672 | Line 3560 | public class CompletableFutureTest exten
3560      }
3561  
3562      /**
3563 +     * Test submissions to an executor that rejects all tasks.
3564 +     */
3565 +    public void testRejectingExecutor() {
3566 +        for (Integer v : new Integer[] { 1, null })
3567 +    {
3568 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3569 +
3570 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3571 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3572 +
3573 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3574 +
3575 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3576 +        srcs.add(complete);
3577 +        srcs.add(incomplete);
3578 +
3579 +        for (CompletableFuture<Integer> src : srcs) {
3580 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3581 +            fs.add(src.thenRunAsync(() -> {}, e));
3582 +            fs.add(src.thenAcceptAsync(z -> {}, e));
3583 +            fs.add(src.thenApplyAsync(z -> z, e));
3584 +
3585 +            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3586 +            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3587 +            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3588 +
3589 +            fs.add(src.applyToEitherAsync(src, z -> z, e));
3590 +            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3591 +            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3592 +
3593 +            fs.add(src.thenComposeAsync(z -> null, e));
3594 +            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3595 +            fs.add(src.handleAsync((z, t) -> null, e));
3596 +
3597 +            for (CompletableFuture<?> future : fs) {
3598 +                if (src.isDone())
3599 +                    checkCompletedWithWrappedException(future, e.ex);
3600 +                else
3601 +                    checkIncomplete(future);
3602 +            }
3603 +            futures.addAll(fs);
3604 +        }
3605 +
3606 +        {
3607 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3608 +
3609 +            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3610 +            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3611 +
3612 +            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3613 +            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3614 +
3615 +            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3616 +            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3617 +
3618 +            for (CompletableFuture<?> future : fs)
3619 +                checkIncomplete(future);
3620 +            futures.addAll(fs);
3621 +        }
3622 +
3623 +        {
3624 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3625 +
3626 +            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3627 +            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3628 +
3629 +            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3630 +            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3631 +
3632 +            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3633 +            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3634 +
3635 +            for (CompletableFuture<?> future : fs)
3636 +                checkCompletedWithWrappedException(future, e.ex);
3637 +            futures.addAll(fs);
3638 +        }
3639 +
3640 +        incomplete.complete(v);
3641 +
3642 +        for (CompletableFuture<?> future : futures)
3643 +            checkCompletedWithWrappedException(future, e.ex);
3644 +
3645 +        assertEquals(futures.size(), e.count.get());
3646 +    }}
3647 +
3648 +    /**
3649 +     * Test submissions to an executor that rejects all tasks, but
3650 +     * should never be invoked because the dependent future is
3651 +     * explicitly completed.
3652 +     */
3653 +    public void testRejectingExecutorNeverInvoked() {
3654 +        for (Integer v : new Integer[] { 1, null })
3655 +    {
3656 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3657 +
3658 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3659 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3660 +
3661 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3662 +
3663 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3664 +        srcs.add(complete);
3665 +        srcs.add(incomplete);
3666 +
3667 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3668 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3669 +        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3670 +        fs.add(incomplete.thenApplyAsync(z -> z, e));
3671 +
3672 +        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3673 +        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3674 +        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3675 +
3676 +        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3677 +        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3678 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3679 +
3680 +        fs.add(incomplete.thenComposeAsync(z -> null, e));
3681 +        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3682 +        fs.add(incomplete.handleAsync((z, t) -> null, e));
3683 +
3684 +        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3685 +        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3686 +
3687 +        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3688 +        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3689 +
3690 +        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3691 +        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3692 +
3693 +        for (CompletableFuture<?> future : fs)
3694 +            checkIncomplete(future);
3695 +
3696 +        for (CompletableFuture<?> future : fs)
3697 +            future.complete(null);
3698 +
3699 +        incomplete.complete(v);
3700 +
3701 +        for (CompletableFuture<?> future : fs)
3702 +            checkCompletedNormally(future, null);
3703 +
3704 +        assertEquals(0, e.count.get());
3705 +    }}
3706 +
3707 +    /**
3708       * toCompletableFuture returns this CompletableFuture.
3709       */
3710      public void testToCompletableFuture() {
# Line 2679 | Line 3712 | public class CompletableFutureTest exten
3712          assertSame(f, f.toCompletableFuture());
3713      }
3714  
3715 +    // jdk9
3716 +
3717      /**
3718 <     * whenComplete action executes on normal completion, propagating
2684 <     * source result.
3718 >     * newIncompleteFuture returns an incomplete CompletableFuture
3719       */
3720 <    public void testWhenComplete_normalCompletion1() {
3721 <        for (ExecutionMode m : ExecutionMode.values())
3720 >    public void testNewIncompleteFuture() {
3721 >        for (Integer v1 : new Integer[] { 1, null })
3722 >    {
3723 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3724 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3725 >        checkIncomplete(f);
3726 >        checkIncomplete(g);
3727 >        f.complete(v1);
3728 >        checkCompletedNormally(f, v1);
3729 >        checkIncomplete(g);
3730 >        g.complete(v1);
3731 >        checkCompletedNormally(g, v1);
3732 >        assertSame(g.getClass(), CompletableFuture.class);
3733 >    }}
3734 >
3735 >    /**
3736 >     * completedStage returns a completed CompletionStage
3737 >     */
3738 >    public void testCompletedStage() {
3739 >        AtomicInteger x = new AtomicInteger(0);
3740 >        AtomicReference<Throwable> r = new AtomicReference<>();
3741 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3742 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3743 >        assertEquals(x.get(), 1);
3744 >        assertNull(r.get());
3745 >    }
3746 >
3747 >    /**
3748 >     * defaultExecutor by default returns the commonPool if
3749 >     * it supports more than one thread.
3750 >     */
3751 >    public void testDefaultExecutor() {
3752 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3753 >        Executor e = f.defaultExecutor();
3754 >        Executor c = ForkJoinPool.commonPool();
3755 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3756 >            assertSame(e, c);
3757 >        else
3758 >            assertNotSame(e, c);
3759 >    }
3760 >
3761 >    /**
3762 >     * failedFuture returns a CompletableFuture completed
3763 >     * exceptionally with the given Exception
3764 >     */
3765 >    public void testFailedFuture() {
3766 >        CFException ex = new CFException();
3767 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3768 >        checkCompletedExceptionally(f, ex);
3769 >    }
3770 >
3771 >    /**
3772 >     * failedFuture(null) throws NPE
3773 >     */
3774 >    public void testFailedFuture_null() {
3775 >        try {
3776 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3777 >            shouldThrow();
3778 >        } catch (NullPointerException success) {}
3779 >    }
3780 >
3781 >    /**
3782 >     * copy returns a CompletableFuture that is completed normally,
3783 >     * with the same value, when source is.
3784 >     */
3785 >    public void testCopy_normalCompletion() {
3786          for (boolean createIncomplete : new boolean[] { true, false })
3787          for (Integer v1 : new Integer[] { 1, null })
3788      {
3789 <        final AtomicInteger a = new AtomicInteger(0);
3790 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3791 <        if (!createIncomplete) f.complete(v1);
3792 <        final CompletableFuture<Integer> g = m.whenComplete
3793 <            (f,
3794 <             (Integer x, Throwable t) -> {
3795 <                threadAssertSame(x, v1);
3796 <                threadAssertNull(t);
3797 <                a.getAndIncrement();
3798 <            });
3799 <        if (createIncomplete) f.complete(v1);
3789 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3790 >        if (!createIncomplete) assertTrue(f.complete(v1));
3791 >        CompletableFuture<Integer> g = f.copy();
3792 >        if (createIncomplete) {
3793 >            checkIncomplete(f);
3794 >            checkIncomplete(g);
3795 >            assertTrue(f.complete(v1));
3796 >        }
3797 >        checkCompletedNormally(f, v1);
3798 >        checkCompletedNormally(g, v1);
3799 >    }}
3800 >
3801 >    /**
3802 >     * copy returns a CompletableFuture that is completed exceptionally
3803 >     * when source is.
3804 >     */
3805 >    public void testCopy_exceptionalCompletion() {
3806 >        for (boolean createIncomplete : new boolean[] { true, false })
3807 >    {
3808 >        CFException ex = new CFException();
3809 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3810 >        if (!createIncomplete) f.completeExceptionally(ex);
3811 >        CompletableFuture<Integer> g = f.copy();
3812 >        if (createIncomplete) {
3813 >            checkIncomplete(f);
3814 >            checkIncomplete(g);
3815 >            f.completeExceptionally(ex);
3816 >        }
3817 >        checkCompletedExceptionally(f, ex);
3818 >        checkCompletedWithWrappedException(g, ex);
3819 >    }}
3820 >
3821 >    /**
3822 >     * Completion of a copy does not complete its source.
3823 >     */
3824 >    public void testCopy_oneWayPropagation() {
3825 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3826 >        assertTrue(f.copy().complete(1));
3827 >        assertTrue(f.copy().complete(null));
3828 >        assertTrue(f.copy().cancel(true));
3829 >        assertTrue(f.copy().cancel(false));
3830 >        assertTrue(f.copy().completeExceptionally(new CFException()));
3831 >        checkIncomplete(f);
3832 >    }
3833 >
3834 >    /**
3835 >     * minimalCompletionStage returns a CompletableFuture that is
3836 >     * completed normally, with the same value, when source is.
3837 >     */
3838 >    public void testMinimalCompletionStage() {
3839 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3840 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3841 >        AtomicInteger x = new AtomicInteger(0);
3842 >        AtomicReference<Throwable> r = new AtomicReference<>();
3843 >        checkIncomplete(f);
3844 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3845 >        f.complete(1);
3846 >        checkCompletedNormally(f, 1);
3847 >        assertEquals(x.get(), 1);
3848 >        assertNull(r.get());
3849 >    }
3850 >
3851 >    /**
3852 >     * minimalCompletionStage returns a CompletableFuture that is
3853 >     * completed exceptionally when source is.
3854 >     */
3855 >    public void testMinimalCompletionStage2() {
3856 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3857 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3858 >        AtomicInteger x = new AtomicInteger(0);
3859 >        AtomicReference<Throwable> r = new AtomicReference<>();
3860 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3861 >        checkIncomplete(f);
3862 >        CFException ex = new CFException();
3863 >        f.completeExceptionally(ex);
3864 >        checkCompletedExceptionally(f, ex);
3865 >        assertEquals(x.get(), 0);
3866 >        assertEquals(r.get().getCause(), ex);
3867 >    }
3868 >
3869 >    /**
3870 >     * failedStage returns a CompletionStage completed
3871 >     * exceptionally with the given Exception
3872 >     */
3873 >    public void testFailedStage() {
3874 >        CFException ex = new CFException();
3875 >        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3876 >        AtomicInteger x = new AtomicInteger(0);
3877 >        AtomicReference<Throwable> r = new AtomicReference<>();
3878 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3879 >        assertEquals(x.get(), 0);
3880 >        assertEquals(r.get(), ex);
3881 >    }
3882 >
3883 >    /**
3884 >     * completeAsync completes with value of given supplier
3885 >     */
3886 >    public void testCompleteAsync() {
3887 >        for (Integer v1 : new Integer[] { 1, null })
3888 >    {
3889 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3890 >        f.completeAsync(() -> v1);
3891 >        f.join();
3892 >        checkCompletedNormally(f, v1);
3893 >    }}
3894 >
3895 >    /**
3896 >     * completeAsync completes exceptionally if given supplier throws
3897 >     */
3898 >    public void testCompleteAsync2() {
3899 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3900 >        CFException ex = new CFException();
3901 >        f.completeAsync(() -> { throw ex; });
3902 >        try {
3903 >            f.join();
3904 >            shouldThrow();
3905 >        } catch (CompletionException success) {}
3906 >        checkCompletedWithWrappedException(f, ex);
3907 >    }
3908  
3909 +    /**
3910 +     * completeAsync with given executor completes with value of given supplier
3911 +     */
3912 +    public void testCompleteAsync3() {
3913 +        for (Integer v1 : new Integer[] { 1, null })
3914 +    {
3915 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3916 +        ThreadExecutor executor = new ThreadExecutor();
3917 +        f.completeAsync(() -> v1, executor);
3918 +        assertSame(v1, f.join());
3919 +        checkCompletedNormally(f, v1);
3920 +        assertEquals(1, executor.count.get());
3921 +    }}
3922 +
3923 +    /**
3924 +     * completeAsync with given executor completes exceptionally if
3925 +     * given supplier throws
3926 +     */
3927 +    public void testCompleteAsync4() {
3928 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3929 +        CFException ex = new CFException();
3930 +        ThreadExecutor executor = new ThreadExecutor();
3931 +        f.completeAsync(() -> { throw ex; }, executor);
3932 +        try {
3933 +            f.join();
3934 +            shouldThrow();
3935 +        } catch (CompletionException success) {}
3936 +        checkCompletedWithWrappedException(f, ex);
3937 +        assertEquals(1, executor.count.get());
3938 +    }
3939 +
3940 +    /**
3941 +     * orTimeout completes with TimeoutException if not complete
3942 +     */
3943 +    public void testOrTimeout_timesOut() {
3944 +        long timeoutMillis = timeoutMillis();
3945 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3946 +        long startTime = System.nanoTime();
3947 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3948 +        checkCompletedWithTimeoutException(f);
3949 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3950 +    }
3951 +
3952 +    /**
3953 +     * orTimeout completes normally if completed before timeout
3954 +     */
3955 +    public void testOrTimeout_completed() {
3956 +        for (Integer v1 : new Integer[] { 1, null })
3957 +    {
3958 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3959 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3960 +        long startTime = System.nanoTime();
3961 +        f.complete(v1);
3962 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3963 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3964 +        g.complete(v1);
3965 +        checkCompletedNormally(f, v1);
3966          checkCompletedNormally(g, v1);
3967 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3968 +    }}
3969 +
3970 +    /**
3971 +     * completeOnTimeout completes with given value if not complete
3972 +     */
3973 +    public void testCompleteOnTimeout_timesOut() {
3974 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3975 +                       () -> testCompleteOnTimeout_timesOut(null));
3976 +    }
3977 +
3978 +    /**
3979 +     * completeOnTimeout completes with given value if not complete
3980 +     */
3981 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3982 +        long timeoutMillis = timeoutMillis();
3983 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3984 +        long startTime = System.nanoTime();
3985 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3986 +        assertSame(v, f.join());
3987 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3988 +        f.complete(99);         // should have no effect
3989 +        checkCompletedNormally(f, v);
3990 +    }
3991 +
3992 +    /**
3993 +     * completeOnTimeout has no effect if completed within timeout
3994 +     */
3995 +    public void testCompleteOnTimeout_completed() {
3996 +        for (Integer v1 : new Integer[] { 1, null })
3997 +    {
3998 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3999 +        CompletableFuture<Integer> g = new CompletableFuture<>();
4000 +        long startTime = System.nanoTime();
4001 +        f.complete(v1);
4002 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
4003 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
4004 +        g.complete(v1);
4005          checkCompletedNormally(f, v1);
4006 <        assertEquals(1, a.get());
4006 >        checkCompletedNormally(g, v1);
4007 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
4008      }}
4009  
4010      /**
4011 <     * whenComplete action executes on exceptional completion, propagating
2710 <     * source result.
4011 >     * delayedExecutor returns an executor that delays submission
4012       */
4013 <    public void testWhenComplete_exceptionalCompletion() {
4013 >    public void testDelayedExecutor() {
4014 >        testInParallel(() -> testDelayedExecutor(null, null),
4015 >                       () -> testDelayedExecutor(null, 1),
4016 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
4017 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
4018 >    }
4019 >
4020 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
4021 >        long timeoutMillis = timeoutMillis();
4022 >        // Use an "unreasonably long" long timeout to catch lingering threads
4023 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
4024 >        final Executor delayer, longDelayer;
4025 >        if (executor == null) {
4026 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
4027 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
4028 >        } else {
4029 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
4030 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
4031 >        }
4032 >        long startTime = System.nanoTime();
4033 >        CompletableFuture<Integer> f =
4034 >            CompletableFuture.supplyAsync(() -> v, delayer);
4035 >        CompletableFuture<Integer> g =
4036 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
4037 >
4038 >        assertNull(g.getNow(null));
4039 >
4040 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
4041 >        long millisElapsed = millisElapsedSince(startTime);
4042 >        assertTrue(millisElapsed >= timeoutMillis);
4043 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
4044 >
4045 >        checkCompletedNormally(f, v);
4046 >
4047 >        checkIncomplete(g);
4048 >        assertTrue(g.cancel(true));
4049 >    }
4050 >
4051 >    //--- tests of implementation details; not part of official tck ---
4052 >
4053 >    Object resultOf(CompletableFuture<?> f) {
4054 >        SecurityManager sm = System.getSecurityManager();
4055 >        if (sm != null) {
4056 >            try {
4057 >                System.setSecurityManager(null);
4058 >            } catch (SecurityException giveUp) {
4059 >                return "Reflection not available";
4060 >            }
4061 >        }
4062 >
4063 >        try {
4064 >            java.lang.reflect.Field resultField
4065 >                = CompletableFuture.class.getDeclaredField("result");
4066 >            resultField.setAccessible(true);
4067 >            return resultField.get(f);
4068 >        } catch (Throwable t) {
4069 >            throw new AssertionError(t);
4070 >        } finally {
4071 >            if (sm != null) System.setSecurityManager(sm);
4072 >        }
4073 >    }
4074 >
4075 >    public void testExceptionPropagationReusesResultObject() {
4076 >        if (!testImplementationDetails) return;
4077          for (ExecutionMode m : ExecutionMode.values())
4078 +    {
4079 +        final CFException ex = new CFException();
4080 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
4081 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4082 +
4083 +        final Runnable noopRunnable = new Noop(m);
4084 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
4085 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
4086 +
4087 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
4088 +            = new ArrayList<>();
4089 +
4090 +        funs.add(y -> m.thenRun(y, noopRunnable));
4091 +        funs.add(y -> m.thenAccept(y, noopConsumer));
4092 +        funs.add(y -> m.thenApply(y, incFunction));
4093 +
4094 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
4095 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
4096 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
4097 +
4098 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
4099 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
4100 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
4101 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
4102 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
4103 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
4104 +
4105 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
4106 +
4107 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
4108 +
4109 +        funs.add(y -> CompletableFuture.allOf(y));
4110 +        funs.add(y -> CompletableFuture.allOf(y, v42));
4111 +        funs.add(y -> CompletableFuture.allOf(v42, y));
4112 +        funs.add(y -> CompletableFuture.anyOf(y));
4113 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
4114 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
4115 +
4116 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4117 +                 fun : funs) {
4118 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4119 +            f.completeExceptionally(ex);
4120 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4121 +            checkCompletedWithWrappedException(src, ex);
4122 +            CompletableFuture<?> dep = fun.apply(src);
4123 +            checkCompletedWithWrappedException(dep, ex);
4124 +            assertSame(resultOf(src), resultOf(dep));
4125 +        }
4126 +
4127 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4128 +                 fun : funs) {
4129 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4130 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4131 +            CompletableFuture<?> dep = fun.apply(src);
4132 +            f.completeExceptionally(ex);
4133 +            checkCompletedWithWrappedException(src, ex);
4134 +            checkCompletedWithWrappedException(dep, ex);
4135 +            assertSame(resultOf(src), resultOf(dep));
4136 +        }
4137 +
4138 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4139 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4140 +                 fun : funs) {
4141 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4142 +            f.cancel(mayInterruptIfRunning);
4143 +            checkCancelled(f);
4144 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4145 +            checkCompletedWithWrappedCancellationException(src);
4146 +            CompletableFuture<?> dep = fun.apply(src);
4147 +            checkCompletedWithWrappedCancellationException(dep);
4148 +            assertSame(resultOf(src), resultOf(dep));
4149 +        }
4150 +
4151 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4152 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4153 +                 fun : funs) {
4154 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4155 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4156 +            CompletableFuture<?> dep = fun.apply(src);
4157 +            f.cancel(mayInterruptIfRunning);
4158 +            checkCancelled(f);
4159 +            checkCompletedWithWrappedCancellationException(src);
4160 +            checkCompletedWithWrappedCancellationException(dep);
4161 +            assertSame(resultOf(src), resultOf(dep));
4162 +        }
4163 +    }}
4164 +
4165 +    /**
4166 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
4167 +     */
4168 +    public void testMinimalCompletionStage_minimality() {
4169 +        if (!testImplementationDetails) return;
4170 +        Function<Method, String> toSignature =
4171 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
4172 +        Predicate<Method> isNotStatic =
4173 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
4174 +        List<Method> minimalMethods =
4175 +            Stream.of(Object.class, CompletionStage.class)
4176 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
4177 +            .filter(isNotStatic)
4178 +            .collect(Collectors.toList());
4179 +        // Methods from CompletableFuture permitted NOT to throw UOE
4180 +        String[] signatureWhitelist = {
4181 +            "newIncompleteFuture[]",
4182 +            "defaultExecutor[]",
4183 +            "minimalCompletionStage[]",
4184 +            "copy[]",
4185 +        };
4186 +        Set<String> permittedMethodSignatures =
4187 +            Stream.concat(minimalMethods.stream().map(toSignature),
4188 +                          Stream.of(signatureWhitelist))
4189 +            .collect(Collectors.toSet());
4190 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
4191 +            .filter(isNotStatic)
4192 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
4193 +            .collect(Collectors.toList());
4194 +
4195 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
4196 +        CompletionStage<Integer> min =
4197 +            new CompletableFuture<Integer>().minimalCompletionStage();
4198 +        stages.add(min);
4199 +        stages.add(min.thenApply(x -> x));
4200 +        stages.add(CompletableFuture.completedStage(1));
4201 +        stages.add(CompletableFuture.failedStage(new CFException()));
4202 +
4203 +        List<Method> bugs = new ArrayList<>();
4204 +        for (Method method : allMethods) {
4205 +            Class<?>[] parameterTypes = method.getParameterTypes();
4206 +            Object[] args = new Object[parameterTypes.length];
4207 +            // Manufacture boxed primitives for primitive params
4208 +            for (int i = 0; i < args.length; i++) {
4209 +                Class<?> type = parameterTypes[i];
4210 +                if (parameterTypes[i] == boolean.class)
4211 +                    args[i] = false;
4212 +                else if (parameterTypes[i] == int.class)
4213 +                    args[i] = 0;
4214 +                else if (parameterTypes[i] == long.class)
4215 +                    args[i] = 0L;
4216 +            }
4217 +            for (CompletionStage<Integer> stage : stages) {
4218 +                try {
4219 +                    method.invoke(stage, args);
4220 +                    bugs.add(method);
4221 +                }
4222 +                catch (java.lang.reflect.InvocationTargetException expected) {
4223 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4224 +                        bugs.add(method);
4225 +                        // expected.getCause().printStackTrace();
4226 +                    }
4227 +                }
4228 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4229 +            }
4230 +        }
4231 +        if (!bugs.isEmpty())
4232 +            throw new Error("Methods did not throw UOE: " + bugs);
4233 +    }
4234 +
4235 +    /**
4236 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4237 +     * is completed normally, with the same value, when source is.
4238 +     */
4239 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4240          for (boolean createIncomplete : new boolean[] { true, false })
4241          for (Integer v1 : new Integer[] { 1, null })
4242      {
4243 <        final AtomicInteger a = new AtomicInteger(0);
4244 <        final CFException ex = new CFException();
4245 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4243 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4244 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4245 >        if (!createIncomplete) assertTrue(f.complete(v1));
4246 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4247 >        if (createIncomplete) {
4248 >            checkIncomplete(f);
4249 >            checkIncomplete(g);
4250 >            assertTrue(f.complete(v1));
4251 >        }
4252 >        checkCompletedNormally(f, v1);
4253 >        checkCompletedNormally(g, v1);
4254 >    }}
4255 >
4256 >    /**
4257 >     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4258 >     * is completed exceptionally when source is.
4259 >     */
4260 >    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4261 >        for (boolean createIncomplete : new boolean[] { true, false })
4262 >    {
4263 >        CFException ex = new CFException();
4264 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4265 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4266          if (!createIncomplete) f.completeExceptionally(ex);
4267 <        final CompletableFuture<Integer> g = m.whenComplete
4268 <            (f,
4269 <             (Integer x, Throwable t) -> {
4270 <                threadAssertNull(x);
4271 <                threadAssertSame(t, ex);
4272 <                a.getAndIncrement();
4273 <            });
4274 <        if (createIncomplete) f.completeExceptionally(ex);
2729 <        checkCompletedWithWrappedCFException(f, ex);
2730 <        checkCompletedWithWrappedCFException(g, ex);
2731 <        assertEquals(1, a.get());
4267 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4268 >        if (createIncomplete) {
4269 >            checkIncomplete(f);
4270 >            checkIncomplete(g);
4271 >            f.completeExceptionally(ex);
4272 >        }
4273 >        checkCompletedExceptionally(f, ex);
4274 >        checkCompletedWithWrappedException(g, ex);
4275      }}
4276  
4277      /**
4278 <     * whenComplete action executes on cancelled source, propagating
2736 <     * CancellationException.
4278 >     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4279       */
4280 <    public void testWhenComplete_sourceCancelled() {
4281 <        for (ExecutionMode m : ExecutionMode.values())
4282 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4280 >    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4281 >        for (Integer v1 : new Integer[] { 1, null })
4282 >    {
4283 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4284 >        CompletionStage minimal = f.minimalCompletionStage();
4285 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4286 >        assertTrue(g.complete(v1));
4287 >        checkCompletedNormally(g, v1);
4288 >        checkIncomplete(f);
4289 >        checkIncomplete(minimal.toCompletableFuture());
4290 >    }}
4291 >
4292 >    /**
4293 >     * minimalStage.toCompletableFuture().join() awaits completion
4294 >     */
4295 >    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4296          for (boolean createIncomplete : new boolean[] { true, false })
4297 +        for (Integer v1 : new Integer[] { 1, null })
4298 +    {
4299 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4300 +        if (!createIncomplete) assertTrue(f.complete(v1));
4301 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4302 +        if (createIncomplete) assertTrue(f.complete(v1));
4303 +        assertEquals(v1, minimal.toCompletableFuture().join());
4304 +        assertEquals(v1, minimal.toCompletableFuture().get());
4305 +        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4306 +    }}
4307 +
4308 +    /**
4309 +     * Completion of a toCompletableFuture copy of a minimal stage
4310 +     * does not complete its source.
4311 +     */
4312 +    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4313 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4314 +        CompletionStage<Integer> g = f.minimalCompletionStage();
4315 +        assertTrue(g.toCompletableFuture().complete(1));
4316 +        assertTrue(g.toCompletableFuture().complete(null));
4317 +        assertTrue(g.toCompletableFuture().cancel(true));
4318 +        assertTrue(g.toCompletableFuture().cancel(false));
4319 +        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4320 +        checkIncomplete(g.toCompletableFuture());
4321 +        f.complete(1);
4322 +        checkCompletedNormally(g.toCompletableFuture(), 1);
4323 +    }
4324 +
4325 +    /** Demo utility method for external reliable toCompletableFuture */
4326 +    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4327 +        CompletableFuture<T> f = new CompletableFuture<>();
4328 +        stage.handle((T t, Throwable ex) -> {
4329 +                         if (ex != null) f.completeExceptionally(ex);
4330 +                         else f.complete(t);
4331 +                         return null;
4332 +                     });
4333 +        return f;
4334 +    }
4335 +
4336 +    /** Demo utility method to join a CompletionStage */
4337 +    static <T> T join(CompletionStage<T> stage) {
4338 +        return toCompletableFuture(stage).join();
4339 +    }
4340 +
4341 +    /**
4342 +     * Joining a minimal stage "by hand" works
4343 +     */
4344 +    public void testMinimalCompletionStage_join_by_hand() {
4345 +        for (boolean createIncomplete : new boolean[] { true, false })
4346 +        for (Integer v1 : new Integer[] { 1, null })
4347 +    {
4348 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4349 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4350 +        CompletableFuture<Integer> g = new CompletableFuture<>();
4351 +        if (!createIncomplete) assertTrue(f.complete(v1));
4352 +        minimal.thenAccept(x -> g.complete(x));
4353 +        if (createIncomplete) assertTrue(f.complete(v1));
4354 +        g.join();
4355 +        checkCompletedNormally(g, v1);
4356 +        checkCompletedNormally(f, v1);
4357 +        assertEquals(v1, join(minimal));
4358 +    }}
4359 +
4360 +    static class Monad {
4361 +        static class ZeroException extends RuntimeException {
4362 +            public ZeroException() { super("monadic zero"); }
4363 +        }
4364 +        // "return", "unit"
4365 +        static <T> CompletableFuture<T> unit(T value) {
4366 +            return completedFuture(value);
4367 +        }
4368 +        // monadic zero ?
4369 +        static <T> CompletableFuture<T> zero() {
4370 +            return failedFuture(new ZeroException());
4371 +        }
4372 +        // >=>
4373 +        static <T,U,V> Function<T, CompletableFuture<V>> compose
4374 +            (Function<T, CompletableFuture<U>> f,
4375 +             Function<U, CompletableFuture<V>> g) {
4376 +            return x -> f.apply(x).thenCompose(g);
4377 +        }
4378 +
4379 +        static void assertZero(CompletableFuture<?> f) {
4380 +            try {
4381 +                f.getNow(null);
4382 +                throw new AssertionError("should throw");
4383 +            } catch (CompletionException success) {
4384 +                assertTrue(success.getCause() instanceof ZeroException);
4385 +            }
4386 +        }
4387 +
4388 +        static <T> void assertFutureEquals(CompletableFuture<T> f,
4389 +                                           CompletableFuture<T> g) {
4390 +            T fval = null, gval = null;
4391 +            Throwable fex = null, gex = null;
4392 +
4393 +            try { fval = f.get(); }
4394 +            catch (ExecutionException ex) { fex = ex.getCause(); }
4395 +            catch (Throwable ex) { fex = ex; }
4396 +
4397 +            try { gval = g.get(); }
4398 +            catch (ExecutionException ex) { gex = ex.getCause(); }
4399 +            catch (Throwable ex) { gex = ex; }
4400 +
4401 +            if (fex != null || gex != null)
4402 +                assertSame(fex.getClass(), gex.getClass());
4403 +            else
4404 +                assertEquals(fval, gval);
4405 +        }
4406 +
4407 +        static class PlusFuture<T> extends CompletableFuture<T> {
4408 +            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4409 +        }
4410 +
4411 +        /** Implements "monadic plus". */
4412 +        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4413 +                                             CompletableFuture<? extends T> g) {
4414 +            PlusFuture<T> plus = new PlusFuture<T>();
4415 +            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4416 +                try {
4417 +                    if (ex == null) {
4418 +                        if (plus.complete(result))
4419 +                            if (plus.firstFailure.get() != null)
4420 +                                plus.firstFailure.set(null);
4421 +                    }
4422 +                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4423 +                        if (plus.isDone())
4424 +                            plus.firstFailure.set(null);
4425 +                    }
4426 +                    else {
4427 +                        // first failure has precedence
4428 +                        Throwable first = plus.firstFailure.getAndSet(null);
4429 +
4430 +                        // may fail with "Self-suppression not permitted"
4431 +                        try { first.addSuppressed(ex); }
4432 +                        catch (Exception ignored) {}
4433 +
4434 +                        plus.completeExceptionally(first);
4435 +                    }
4436 +                } catch (Throwable unexpected) {
4437 +                    plus.completeExceptionally(unexpected);
4438 +                }
4439 +            };
4440 +            f.whenComplete(action);
4441 +            g.whenComplete(action);
4442 +            return plus;
4443 +        }
4444 +    }
4445 +
4446 +    /**
4447 +     * CompletableFuture is an additive monad - sort of.
4448 +     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4449 +     */
4450 +    public void testAdditiveMonad() throws Throwable {
4451 +        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4452 +        CompletableFuture<Long> zero = Monad.zero();
4453 +
4454 +        // Some mutually non-commutative functions
4455 +        Function<Long, CompletableFuture<Long>> triple
4456 +            = x -> Monad.unit(3 * x);
4457 +        Function<Long, CompletableFuture<Long>> inc
4458 +            = x -> Monad.unit(x + 1);
4459 +
4460 +        // unit is a right identity: m >>= unit === m
4461 +        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4462 +                                 inc.apply(5L));
4463 +        // unit is a left identity: (unit x) >>= f === f x
4464 +        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4465 +                                 inc.apply(5L));
4466 +
4467 +        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4468 +        Monad.assertFutureEquals(
4469 +            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4470 +            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4471 +
4472 +        // The case for CompletableFuture as an additive monad is weaker...
4473 +
4474 +        // zero is a monadic zero
4475 +        Monad.assertZero(zero);
4476 +
4477 +        // left zero: zero >>= f === zero
4478 +        Monad.assertZero(zero.thenCompose(inc));
4479 +        // right zero: f >>= (\x -> zero) === zero
4480 +        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4481 +
4482 +        // f plus zero === f
4483 +        Monad.assertFutureEquals(Monad.unit(5L),
4484 +                                 Monad.plus(Monad.unit(5L), zero));
4485 +        // zero plus f === f
4486 +        Monad.assertFutureEquals(Monad.unit(5L),
4487 +                                 Monad.plus(zero, Monad.unit(5L)));
4488 +        // zero plus zero === zero
4489 +        Monad.assertZero(Monad.plus(zero, zero));
4490 +        {
4491 +            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4492 +                                                   Monad.unit(8L));
4493 +            // non-determinism
4494 +            assertTrue(f.get() == 5L || f.get() == 8L);
4495 +        }
4496 +
4497 +        CompletableFuture<Long> godot = new CompletableFuture<>();
4498 +        // f plus godot === f (doesn't wait for godot)
4499 +        Monad.assertFutureEquals(Monad.unit(5L),
4500 +                                 Monad.plus(Monad.unit(5L), godot));
4501 +        // godot plus f === f (doesn't wait for godot)
4502 +        Monad.assertFutureEquals(Monad.unit(5L),
4503 +                                 Monad.plus(godot, Monad.unit(5L)));
4504 +    }
4505 +
4506 +    /** Test long recursive chains of CompletableFutures with cascading completions */
4507 +    @SuppressWarnings("FutureReturnValueIgnored")
4508 +    public void testRecursiveChains() throws Throwable {
4509 +        for (ExecutionMode m : ExecutionMode.values())
4510 +        for (boolean addDeadEnds : new boolean[] { true, false })
4511 +    {
4512 +        final int val = 42;
4513 +        final int n = expensiveTests ? 1_000 : 2;
4514 +        CompletableFuture<Integer> head = new CompletableFuture<>();
4515 +        CompletableFuture<Integer> tail = head;
4516 +        for (int i = 0; i < n; i++) {
4517 +            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4518 +            tail = m.thenApply(tail, v -> v + 1);
4519 +            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4520 +            tail = m.applyToEither(tail, tail, v -> v + 1);
4521 +            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4522 +            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4523 +        }
4524 +        head.complete(val);
4525 +        assertEquals(val + 3 * n, (int) tail.join());
4526 +    }}
4527 +
4528 +    /**
4529 +     * A single CompletableFuture with many dependents.
4530 +     * A demo of scalability - runtime is O(n).
4531 +     */
4532 +    @SuppressWarnings("FutureReturnValueIgnored")
4533 +    public void testManyDependents() throws Throwable {
4534 +        final int n = expensiveTests ? 1_000_000 : 10;
4535 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4536 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4537 +        final AtomicInteger count = new AtomicInteger(0);
4538 +        for (int i = 0; i < n; i++) {
4539 +            head.thenRun(() -> count.getAndIncrement());
4540 +            head.thenAccept(x -> count.getAndIncrement());
4541 +            head.thenApply(x -> count.getAndIncrement());
4542 +
4543 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4544 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4545 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4546 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4547 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4548 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4549 +
4550 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4551 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4552 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4553 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4554 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4555 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4556 +        }
4557 +        head.complete(null);
4558 +        assertEquals(5 * 3 * n, count.get());
4559 +    }
4560 +
4561 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4562 +    @SuppressWarnings("FutureReturnValueIgnored")
4563 +    public void testCoCompletionGarbageRetention() throws Throwable {
4564 +        final int n = expensiveTests ? 1_000_000 : 10;
4565 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4566 +        CompletableFuture<Integer> f;
4567 +        for (int i = 0; i < n; i++) {
4568 +            f = new CompletableFuture<>();
4569 +            f.runAfterEither(incomplete, () -> {});
4570 +            f.complete(null);
4571 +
4572 +            f = new CompletableFuture<>();
4573 +            f.acceptEither(incomplete, x -> {});
4574 +            f.complete(null);
4575 +
4576 +            f = new CompletableFuture<>();
4577 +            f.applyToEither(incomplete, x -> x);
4578 +            f.complete(null);
4579 +
4580 +            f = new CompletableFuture<>();
4581 +            CompletableFuture.anyOf(f, incomplete);
4582 +            f.complete(null);
4583 +        }
4584 +
4585 +        for (int i = 0; i < n; i++) {
4586 +            f = new CompletableFuture<>();
4587 +            incomplete.runAfterEither(f, () -> {});
4588 +            f.complete(null);
4589 +
4590 +            f = new CompletableFuture<>();
4591 +            incomplete.acceptEither(f, x -> {});
4592 +            f.complete(null);
4593 +
4594 +            f = new CompletableFuture<>();
4595 +            incomplete.applyToEither(f, x -> x);
4596 +            f.complete(null);
4597 +
4598 +            f = new CompletableFuture<>();
4599 +            CompletableFuture.anyOf(incomplete, f);
4600 +            f.complete(null);
4601 +        }
4602 +    }
4603 +
4604 +    /**
4605 +     * Reproduction recipe for:
4606 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4607 +     * cvs update -D '2016-05-01' ./src/main/java/util/concurrent/CompletableFuture.java && ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testAnyOfGarbageRetention tck; cvs update -A
4608 +     */
4609 +    public void testAnyOfGarbageRetention() throws Throwable {
4610 +        for (Integer v : new Integer[] { 1, null })
4611 +    {
4612 +        final int n = expensiveTests ? 100_000 : 10;
4613 +        CompletableFuture<Integer>[] fs
4614 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4615 +        for (int i = 0; i < fs.length; i++)
4616 +            fs[i] = new CompletableFuture<>();
4617 +        fs[fs.length - 1].complete(v);
4618 +        for (int i = 0; i < n; i++)
4619 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4620 +    }}
4621 +
4622 +    /**
4623 +     * Checks for garbage retention with allOf.
4624 +     *
4625 +     * As of 2016-07, fails with OOME:
4626 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4627 +     */
4628 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4629 +        final int n = expensiveTests ? 100_000 : 10;
4630 +        CompletableFuture<Integer>[] fs
4631 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4632 +        for (int i = 0; i < fs.length; i++)
4633 +            fs[i] = new CompletableFuture<>();
4634 +        for (int i = 0; i < n; i++)
4635 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4636 +    }
4637 +
4638 +    /**
4639 +     * Checks for garbage retention when a dependent future is
4640 +     * cancelled and garbage-collected.
4641 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4642 +     *
4643 +     * As of 2016-07, fails with OOME:
4644 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4645 +     */
4646 +    public void testCancelledGarbageRetention() throws Throwable {
4647 +        final int n = expensiveTests ? 100_000 : 10;
4648 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4649 +        for (int i = 0; i < n; i++)
4650 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4651 +    }
4652 +
4653 +    /**
4654 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4655 +     * is invoked many times.
4656 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4657 +     *
4658 +     * As of 2016-07, fails with OOME:
4659 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4660 +     */
4661 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4662 +        final int n = expensiveTests ? 900_000 : 10;
4663 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4664 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4665 +        for (int i = 0; i < n; i++)
4666 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4667 +    }
4668 +
4669 + //     static <U> U join(CompletionStage<U> stage) {
4670 + //         CompletableFuture<U> f = new CompletableFuture<>();
4671 + //         stage.whenComplete((v, ex) -> {
4672 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4673 + //         });
4674 + //         return f.join();
4675 + //     }
4676 +
4677 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4678 + //         CompletableFuture<U> f = new CompletableFuture<>();
4679 + //         stage.whenComplete((v, ex) -> {
4680 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4681 + //         });
4682 + //         return f.isDone();
4683 + //     }
4684 +
4685 + //     static <U> U join2(CompletionStage<U> stage) {
4686 + //         return stage.toCompletableFuture().copy().join();
4687 + //     }
4688 +
4689 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4690 + //         return stage.toCompletableFuture().copy().isDone();
4691 + //     }
4692 +
4693 +    // For testing default implementations
4694 +    // Only non-default interface methods defined.
4695 +    static final class DelegatedCompletionStage<T> implements CompletionStage<T> {
4696 +        final CompletableFuture<T> cf;
4697 +        DelegatedCompletionStage(CompletableFuture<T> cf) { this.cf = cf; }
4698 +        public CompletableFuture<T> toCompletableFuture() {
4699 +            return cf; }
4700 +        public CompletionStage<Void> thenRun
4701 +            (Runnable action) {
4702 +            return cf.thenRun(action); }
4703 +        public CompletionStage<Void> thenRunAsync
4704 +            (Runnable action) {
4705 +            return cf.thenRunAsync(action); }
4706 +        public CompletionStage<Void> thenRunAsync
4707 +            (Runnable action,
4708 +             Executor executor) {
4709 +            return cf.thenRunAsync(action, executor); }
4710 +        public CompletionStage<Void> thenAccept
4711 +            (Consumer<? super T> action) {
4712 +            return cf.thenAccept(action); }
4713 +        public CompletionStage<Void> thenAcceptAsync
4714 +            (Consumer<? super T> action) {
4715 +            return cf.thenAcceptAsync(action); }
4716 +        public CompletionStage<Void> thenAcceptAsync
4717 +            (Consumer<? super T> action,
4718 +             Executor executor) {
4719 +            return cf.thenAcceptAsync(action, executor); }
4720 +        public <U> CompletionStage<U> thenApply
4721 +            (Function<? super T,? extends U> a) {
4722 +            return cf.thenApply(a); }
4723 +        public <U> CompletionStage<U> thenApplyAsync
4724 +            (Function<? super T,? extends U> fn) {
4725 +            return cf.thenApplyAsync(fn); }
4726 +        public <U> CompletionStage<U> thenApplyAsync
4727 +            (Function<? super T,? extends U> fn,
4728 +             Executor executor) {
4729 +            return cf.thenApplyAsync(fn, executor); }
4730 +        public <U,V> CompletionStage<V> thenCombine
4731 +            (CompletionStage<? extends U> other,
4732 +             BiFunction<? super T,? super U,? extends V> fn) {
4733 +            return cf.thenCombine(other, fn); }
4734 +        public <U,V> CompletionStage<V> thenCombineAsync
4735 +            (CompletionStage<? extends U> other,
4736 +             BiFunction<? super T,? super U,? extends V> fn) {
4737 +            return cf.thenCombineAsync(other, fn); }
4738 +        public <U,V> CompletionStage<V> thenCombineAsync
4739 +            (CompletionStage<? extends U> other,
4740 +             BiFunction<? super T,? super U,? extends V> fn,
4741 +             Executor executor) {
4742 +            return cf.thenCombineAsync(other, fn, executor); }
4743 +        public <U> CompletionStage<Void> thenAcceptBoth
4744 +            (CompletionStage<? extends U> other,
4745 +             BiConsumer<? super T, ? super U> action) {
4746 +            return cf.thenAcceptBoth(other, action); }
4747 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4748 +            (CompletionStage<? extends U> other,
4749 +             BiConsumer<? super T, ? super U> action) {
4750 +            return cf.thenAcceptBothAsync(other, action); }
4751 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4752 +            (CompletionStage<? extends U> other,
4753 +             BiConsumer<? super T, ? super U> action,
4754 +             Executor executor) {
4755 +            return cf.thenAcceptBothAsync(other, action, executor); }
4756 +        public CompletionStage<Void> runAfterBoth
4757 +            (CompletionStage<?> other,
4758 +             Runnable action) {
4759 +            return cf.runAfterBoth(other, action); }
4760 +        public CompletionStage<Void> runAfterBothAsync
4761 +            (CompletionStage<?> other,
4762 +             Runnable action) {
4763 +            return cf.runAfterBothAsync(other, action); }
4764 +        public CompletionStage<Void> runAfterBothAsync
4765 +            (CompletionStage<?> other,
4766 +             Runnable action,
4767 +             Executor executor) {
4768 +            return cf.runAfterBothAsync(other, action, executor); }
4769 +        public <U> CompletionStage<U> applyToEither
4770 +            (CompletionStage<? extends T> other,
4771 +             Function<? super T, U> fn) {
4772 +            return cf.applyToEither(other, fn); }
4773 +        public <U> CompletionStage<U> applyToEitherAsync
4774 +            (CompletionStage<? extends T> other,
4775 +             Function<? super T, U> fn) {
4776 +            return cf.applyToEitherAsync(other, fn); }
4777 +        public <U> CompletionStage<U> applyToEitherAsync
4778 +            (CompletionStage<? extends T> other,
4779 +             Function<? super T, U> fn,
4780 +             Executor executor) {
4781 +            return cf.applyToEitherAsync(other, fn, executor); }
4782 +        public CompletionStage<Void> acceptEither
4783 +            (CompletionStage<? extends T> other,
4784 +             Consumer<? super T> action) {
4785 +            return cf.acceptEither(other, action); }
4786 +        public CompletionStage<Void> acceptEitherAsync
4787 +            (CompletionStage<? extends T> other,
4788 +             Consumer<? super T> action) {
4789 +            return cf.acceptEitherAsync(other, action); }
4790 +        public CompletionStage<Void> acceptEitherAsync
4791 +            (CompletionStage<? extends T> other,
4792 +             Consumer<? super T> action,
4793 +             Executor executor) {
4794 +            return cf.acceptEitherAsync(other, action, executor); }
4795 +        public CompletionStage<Void> runAfterEither
4796 +            (CompletionStage<?> other,
4797 +             Runnable action) {
4798 +            return cf.runAfterEither(other, action); }
4799 +        public CompletionStage<Void> runAfterEitherAsync
4800 +            (CompletionStage<?> other,
4801 +             Runnable action) {
4802 +            return cf.runAfterEitherAsync(other, action); }
4803 +        public CompletionStage<Void> runAfterEitherAsync
4804 +            (CompletionStage<?> other,
4805 +             Runnable action,
4806 +             Executor executor) {
4807 +            return cf.runAfterEitherAsync(other, action, executor); }
4808 +        public <U> CompletionStage<U> thenCompose
4809 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4810 +            return cf.thenCompose(fn); }
4811 +        public <U> CompletionStage<U> thenComposeAsync
4812 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4813 +            return cf.thenComposeAsync(fn); }
4814 +        public <U> CompletionStage<U> thenComposeAsync
4815 +            (Function<? super T, ? extends CompletionStage<U>> fn,
4816 +             Executor executor) {
4817 +            return cf.thenComposeAsync(fn, executor); }
4818 +        public <U> CompletionStage<U> handle
4819 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4820 +            return cf.handle(fn); }
4821 +        public <U> CompletionStage<U> handleAsync
4822 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4823 +            return cf.handleAsync(fn); }
4824 +        public <U> CompletionStage<U> handleAsync
4825 +            (BiFunction<? super T, Throwable, ? extends U> fn,
4826 +             Executor executor) {
4827 +            return cf.handleAsync(fn, executor); }
4828 +        public CompletionStage<T> whenComplete
4829 +            (BiConsumer<? super T, ? super Throwable> action) {
4830 +            return cf.whenComplete(action); }
4831 +        public CompletionStage<T> whenCompleteAsync
4832 +            (BiConsumer<? super T, ? super Throwable> action) {
4833 +            return cf.whenCompleteAsync(action); }
4834 +        public CompletionStage<T> whenCompleteAsync
4835 +            (BiConsumer<? super T, ? super Throwable> action,
4836 +             Executor executor) {
4837 +            return cf.whenCompleteAsync(action, executor); }
4838 +        public CompletionStage<T> exceptionally
4839 +            (Function<Throwable, ? extends T> fn) {
4840 +            return cf.exceptionally(fn); }
4841 +    }
4842 +
4843 +    /**
4844 +     * default-implemented exceptionallyAsync action is not invoked when
4845 +     * source completes normally, and source result is propagated
4846 +     */
4847 +    public void testDefaultExceptionallyAsync_normalCompletion() {
4848 +        for (boolean createIncomplete : new boolean[] { true, false })
4849 +        for (Integer v1 : new Integer[] { 1, null })
4850      {
2743        final AtomicInteger a = new AtomicInteger(0);
4851          final CompletableFuture<Integer> f = new CompletableFuture<>();
4852 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4853 <        final CompletableFuture<Integer> g = m.whenComplete
4854 <            (f,
4855 <             (Integer x, Throwable t) -> {
4856 <                threadAssertNull(x);
4857 <                threadAssertTrue(t instanceof CancellationException);
4858 <                a.getAndIncrement();
4852 >        final DelegatedCompletionStage<Integer> d =
4853 >            new DelegatedCompletionStage<Integer>(f);
4854 >        if (!createIncomplete) assertTrue(f.complete(v1));
4855 >        final CompletionStage<Integer> g = d.exceptionallyAsync
4856 >            ((Throwable t) -> {
4857 >                threadFail("should not be called");
4858 >                return null;            // unreached
4859              });
4860 <        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4860 >        if (createIncomplete) assertTrue(f.complete(v1));
4861  
4862 <        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
2756 <        checkCompletedWithWrappedCancellationException(g);
2757 <        checkCancelled(f);
2758 <        assertEquals(1, a.get());
4862 >        checkCompletedNormally(g.toCompletableFuture(), v1);
4863      }}
4864  
4865      /**
4866 <     * If a whenComplete action throws an exception when triggered by
4867 <     * a normal completion, it completes exceptionally
4866 >     * default-implemented exceptionallyAsync action completes with
4867 >     * function value on source exception
4868       */
4869 <    public void testWhenComplete_actionFailed() {
4869 >    public void testDefaultExceptionallyAsync_exceptionalCompletion() {
4870          for (boolean createIncomplete : new boolean[] { true, false })
2767        for (ExecutionMode m : ExecutionMode.values())
4871          for (Integer v1 : new Integer[] { 1, null })
4872      {
4873          final AtomicInteger a = new AtomicInteger(0);
4874          final CFException ex = new CFException();
4875          final CompletableFuture<Integer> f = new CompletableFuture<>();
4876 <        if (!createIncomplete) f.complete(v1);
4877 <        final CompletableFuture<Integer> g = m.whenComplete
4878 <            (f,
4879 <             (Integer x, Throwable t) -> {
4880 <                threadAssertSame(x, v1);
4881 <                threadAssertNull(t);
4876 >        final DelegatedCompletionStage<Integer> d =
4877 >            new DelegatedCompletionStage<Integer>(f);
4878 >        if (!createIncomplete) f.completeExceptionally(ex);
4879 >        final CompletionStage<Integer> g = d.exceptionallyAsync
4880 >            ((Throwable t) -> {
4881 >                threadAssertSame(t, ex);
4882                  a.getAndIncrement();
4883 <                throw ex;
4883 >                return v1;
4884              });
4885 <        if (createIncomplete) f.complete(v1);
4886 <        checkCompletedNormally(f, v1);
4887 <        checkCompletedWithWrappedCFException(g, ex);
4885 >        if (createIncomplete) f.completeExceptionally(ex);
4886 >
4887 >        checkCompletedNormally(g.toCompletableFuture(), v1);
4888          assertEquals(1, a.get());
4889      }}
4890  
4891      /**
4892 <     * If a whenComplete action throws an exception when triggered by
4893 <     * a source completion that also throws an exception, the source
4894 <     * exception takes precedence.
4892 >     * Under default implementation, if an "exceptionally action"
4893 >     * throws an exception, it completes exceptionally with that
4894 >     * exception
4895       */
4896 <    public void testWhenComplete_actionFailedSourceFailed() {
4896 >    public void testDefaultExceptionallyAsync_exceptionalCompletionActionFailed() {
4897          for (boolean createIncomplete : new boolean[] { true, false })
2795        for (ExecutionMode m : ExecutionMode.values())
2796        for (Integer v1 : new Integer[] { 1, null })
4898      {
4899          final AtomicInteger a = new AtomicInteger(0);
4900          final CFException ex1 = new CFException();
4901          final CFException ex2 = new CFException();
4902          final CompletableFuture<Integer> f = new CompletableFuture<>();
4903 <
4903 >        final DelegatedCompletionStage<Integer> d =
4904 >            new DelegatedCompletionStage<Integer>(f);
4905          if (!createIncomplete) f.completeExceptionally(ex1);
4906 <        final CompletableFuture<Integer> g = m.whenComplete
4907 <            (f,
2806 <             (Integer x, Throwable t) -> {
4906 >        final CompletionStage<Integer> g = d.exceptionallyAsync
4907 >            ((Throwable t) -> {
4908                  threadAssertSame(t, ex1);
2808                threadAssertNull(x);
4909                  a.getAndIncrement();
4910                  throw ex2;
4911              });
4912          if (createIncomplete) f.completeExceptionally(ex1);
4913  
4914 <        checkCompletedWithWrappedCFException(f, ex1);
4915 <        checkCompletedWithWrappedCFException(g, ex1);
4914 >        checkCompletedWithWrappedException(g.toCompletableFuture(), ex2);
4915 >        checkCompletedExceptionally(f, ex1);
4916 >        checkCompletedExceptionally(d.toCompletableFuture(), ex1);
4917          assertEquals(1, a.get());
4918      }}
4919  
4920 +    /**
4921 +     * default exceptionallyCompose result completes normally after normal
4922 +     * completion of source
4923 +     */
4924 +    public void testDefaultExceptionallyCompose_normalCompletion() {
4925 +        for (boolean createIncomplete : new boolean[] { true, false })
4926 +        for (Integer v1 : new Integer[] { 1, null })
4927 +    {
4928 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4929 +        final ExceptionalCompletableFutureFunction r =
4930 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4931 +        final DelegatedCompletionStage<Integer> d =
4932 +            new DelegatedCompletionStage<Integer>(f);
4933 +        if (!createIncomplete) assertTrue(f.complete(v1));
4934 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4935 +        if (createIncomplete) assertTrue(f.complete(v1));
4936 +
4937 +        checkCompletedNormally(f, v1);
4938 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4939 +        r.assertNotInvoked();
4940 +    }}
4941 +
4942 +    /**
4943 +     * default-implemented exceptionallyCompose result completes
4944 +     * normally after exceptional completion of source
4945 +     */
4946 +    public void testDefaultExceptionallyCompose_exceptionalCompletion() {
4947 +        for (boolean createIncomplete : new boolean[] { true, false })
4948 +    {
4949 +        final CFException ex = new CFException();
4950 +        final ExceptionalCompletableFutureFunction r =
4951 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4952 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4953 +        final DelegatedCompletionStage<Integer> d =
4954 +            new DelegatedCompletionStage<Integer>(f);
4955 +        if (!createIncomplete) f.completeExceptionally(ex);
4956 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4957 +        if (createIncomplete) f.completeExceptionally(ex);
4958 +
4959 +        checkCompletedExceptionally(f, ex);
4960 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
4961 +        r.assertInvoked();
4962 +    }}
4963 +
4964 +    /**
4965 +     * default-implemented exceptionallyCompose completes
4966 +     * exceptionally on exception if action does
4967 +     */
4968 +    public void testDefaultExceptionallyCompose_actionFailed() {
4969 +        for (boolean createIncomplete : new boolean[] { true, false })
4970 +        for (Integer v1 : new Integer[] { 1, null })
4971 +    {
4972 +        final CFException ex = new CFException();
4973 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4974 +        final FailingExceptionalCompletableFutureFunction r
4975 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4976 +        final DelegatedCompletionStage<Integer> d =
4977 +            new DelegatedCompletionStage<Integer>(f);
4978 +        if (!createIncomplete) f.completeExceptionally(ex);
4979 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4980 +        if (createIncomplete) f.completeExceptionally(ex);
4981 +
4982 +        checkCompletedExceptionally(f, ex);
4983 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
4984 +        r.assertInvoked();
4985 +    }}
4986 +
4987 +    /**
4988 +     * default exceptionallyComposeAsync result completes normally after normal
4989 +     * completion of source
4990 +     */
4991 +    public void testDefaultExceptionallyComposeAsync_normalCompletion() {
4992 +        for (boolean createIncomplete : new boolean[] { true, false })
4993 +        for (Integer v1 : new Integer[] { 1, null })
4994 +    {
4995 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4996 +        final ExceptionalCompletableFutureFunction r =
4997 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
4998 +        final DelegatedCompletionStage<Integer> d =
4999 +            new DelegatedCompletionStage<Integer>(f);
5000 +        if (!createIncomplete) assertTrue(f.complete(v1));
5001 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
5002 +        if (createIncomplete) assertTrue(f.complete(v1));
5003 +
5004 +        checkCompletedNormally(f, v1);
5005 +        checkCompletedNormally(g.toCompletableFuture(), v1);
5006 +        r.assertNotInvoked();
5007 +    }}
5008 +
5009 +    /**
5010 +     * default-implemented exceptionallyComposeAsync result completes
5011 +     * normally after exceptional completion of source
5012 +     */
5013 +    public void testDefaultExceptionallyComposeAsync_exceptionalCompletion() {
5014 +        for (boolean createIncomplete : new boolean[] { true, false })
5015 +    {
5016 +        final CFException ex = new CFException();
5017 +        final ExceptionalCompletableFutureFunction r =
5018 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
5019 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5020 +        final DelegatedCompletionStage<Integer> d =
5021 +            new DelegatedCompletionStage<Integer>(f);
5022 +        if (!createIncomplete) f.completeExceptionally(ex);
5023 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
5024 +        if (createIncomplete) f.completeExceptionally(ex);
5025 +
5026 +        checkCompletedExceptionally(f, ex);
5027 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
5028 +        r.assertInvoked();
5029 +    }}
5030 +
5031 +    /**
5032 +     * default-implemented exceptionallyComposeAsync completes
5033 +     * exceptionally on exception if action does
5034 +     */
5035 +    public void testDefaultExceptionallyComposeAsync_actionFailed() {
5036 +        for (boolean createIncomplete : new boolean[] { true, false })
5037 +        for (Integer v1 : new Integer[] { 1, null })
5038 +    {
5039 +        final CFException ex = new CFException();
5040 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5041 +        final FailingExceptionalCompletableFutureFunction r
5042 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
5043 +        final DelegatedCompletionStage<Integer> d =
5044 +            new DelegatedCompletionStage<Integer>(f);
5045 +        if (!createIncomplete) f.completeExceptionally(ex);
5046 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
5047 +        if (createIncomplete) f.completeExceptionally(ex);
5048 +
5049 +        checkCompletedExceptionally(f, ex);
5050 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
5051 +        r.assertInvoked();
5052 +    }}
5053 +
5054 +
5055 +    /**
5056 +     * default exceptionallyComposeAsync result completes normally after normal
5057 +     * completion of source
5058 +     */
5059 +    public void testDefaultExceptionallyComposeAsyncExecutor_normalCompletion() {
5060 +        for (boolean createIncomplete : new boolean[] { true, false })
5061 +        for (Integer v1 : new Integer[] { 1, null })
5062 +    {
5063 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5064 +        final ExceptionalCompletableFutureFunction r =
5065 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5066 +        final DelegatedCompletionStage<Integer> d =
5067 +            new DelegatedCompletionStage<Integer>(f);
5068 +        if (!createIncomplete) assertTrue(f.complete(v1));
5069 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5070 +        if (createIncomplete) assertTrue(f.complete(v1));
5071 +
5072 +        checkCompletedNormally(f, v1);
5073 +        checkCompletedNormally(g.toCompletableFuture(), v1);
5074 +        r.assertNotInvoked();
5075 +    }}
5076 +
5077 +    /**
5078 +     * default-implemented exceptionallyComposeAsync result completes
5079 +     * normally after exceptional completion of source
5080 +     */
5081 +    public void testDefaultExceptionallyComposeAsyncExecutor_exceptionalCompletion() {
5082 +        for (boolean createIncomplete : new boolean[] { true, false })
5083 +    {
5084 +        final CFException ex = new CFException();
5085 +        final ExceptionalCompletableFutureFunction r =
5086 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5087 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5088 +        final DelegatedCompletionStage<Integer> d =
5089 +            new DelegatedCompletionStage<Integer>(f);
5090 +        if (!createIncomplete) f.completeExceptionally(ex);
5091 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5092 +        if (createIncomplete) f.completeExceptionally(ex);
5093 +
5094 +        checkCompletedExceptionally(f, ex);
5095 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
5096 +        r.assertInvoked();
5097 +    }}
5098 +
5099 +    /**
5100 +     * default-implemented exceptionallyComposeAsync completes
5101 +     * exceptionally on exception if action does
5102 +     */
5103 +    public void testDefaultExceptionallyComposeAsyncExecutor_actionFailed() {
5104 +        for (boolean createIncomplete : new boolean[] { true, false })
5105 +        for (Integer v1 : new Integer[] { 1, null })
5106 +    {
5107 +        final CFException ex = new CFException();
5108 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5109 +        final FailingExceptionalCompletableFutureFunction r
5110 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5111 +        final DelegatedCompletionStage<Integer> d =
5112 +            new DelegatedCompletionStage<Integer>(f);
5113 +        if (!createIncomplete) f.completeExceptionally(ex);
5114 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5115 +        if (createIncomplete) f.completeExceptionally(ex);
5116 +
5117 +        checkCompletedExceptionally(f, ex);
5118 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
5119 +        r.assertInvoked();
5120 +    }}
5121 +
5122   }

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