--- jsr166/src/test/tck/CompletableFutureTest.java	2013/02/10 21:18:25	1.4
+++ jsr166/src/test/tck/CompletableFutureTest.java	2014/06/06 16:54:16	1.63
@@ -7,16 +7,28 @@
 
 import junit.framework.*;
 import java.util.concurrent.Callable;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinTask;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicInteger;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import java.util.*;
+import java.util.function.Supplier;
+import java.util.function.Consumer;
+import java.util.function.BiConsumer;
+import java.util.function.Function;
+import java.util.function.BiFunction;
 
 public class CompletableFutureTest extends JSR166TestCase {
 
@@ -27,6 +39,8 @@ public class CompletableFutureTest exten
         return new TestSuite(CompletableFutureTest.class);
     }
 
+    static class CFException extends RuntimeException {}
+
     void checkIncomplete(CompletableFuture<?> f) {
         assertFalse(f.isDone());
         assertFalse(f.isCancelled());
@@ -42,29 +56,248 @@ public class CompletableFutureTest exten
         catch (Throwable fail) { threadUnexpectedException(fail); }
     }
 
-    void checkCompletedNormally(CompletableFuture<?> f, Object value) {
+    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
+        try {
+            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            assertEquals(value, f.join());
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            assertEquals(value, f.getNow(null));
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            assertEquals(value, f.get());
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
         assertTrue(f.isDone());
         assertFalse(f.isCancelled());
+        assertFalse(f.isCompletedExceptionally());
         assertTrue(f.toString().contains("[Completed normally]"));
+    }
+
+    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
+        try {
+            f.get(LONG_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof CFException);
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            f.join();
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertTrue(success.getCause() instanceof CFException);
+        }
+        try {
+            f.getNow(null);
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertTrue(success.getCause() instanceof CFException);
+        }
+        try {
+            f.get();
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof CFException);
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        assertTrue(f.isDone());
+        assertFalse(f.isCancelled());
+        assertTrue(f.toString().contains("[Completed exceptionally]"));
+    }
+
+    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
+                                              CFException ex) {
+        try {
+            f.get(LONG_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertSame(ex, success.getCause());
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            f.join();
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertSame(ex, success.getCause());
+        }
+        try {
+            f.getNow(null);
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertSame(ex, success.getCause());
+        }
         try {
-            assertSame(value, f.join());
+            f.get();
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertSame(ex, success.getCause());
         } catch (Throwable fail) { threadUnexpectedException(fail); }
+        assertTrue(f.isDone());
+        assertFalse(f.isCancelled());
+        assertTrue(f.toString().contains("[Completed exceptionally]"));
+    }
+
+    void checkCancelled(CompletableFuture<?> f) {
         try {
-            assertSame(value, f.getNow(null));
+            f.get(LONG_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (CancellationException success) {
         } catch (Throwable fail) { threadUnexpectedException(fail); }
         try {
-            assertSame(value, f.get());
+            f.join();
+            shouldThrow();
+        } catch (CancellationException success) {}
+        try {
+            f.getNow(null);
+            shouldThrow();
+        } catch (CancellationException success) {}
+        try {
+            f.get();
+            shouldThrow();
+        } catch (CancellationException success) {
         } catch (Throwable fail) { threadUnexpectedException(fail); }
+        assertTrue(f.isDone());
+        assertTrue(f.isCompletedExceptionally());
+        assertTrue(f.isCancelled());
+        assertTrue(f.toString().contains("[Completed exceptionally]"));
+    }
+
+    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
         try {
-            assertSame(value, f.get(0L, SECONDS));
+            f.get(LONG_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof CancellationException);
         } catch (Throwable fail) { threadUnexpectedException(fail); }
+        try {
+            f.join();
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertTrue(success.getCause() instanceof CancellationException);
+        }
+        try {
+            f.getNow(null);
+            shouldThrow();
+        } catch (CompletionException success) {
+            assertTrue(success.getCause() instanceof CancellationException);
+        }
+        try {
+            f.get();
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof CancellationException);
+        } catch (Throwable fail) { threadUnexpectedException(fail); }
+        assertTrue(f.isDone());
+        assertFalse(f.isCancelled());
+        assertTrue(f.isCompletedExceptionally());
+        assertTrue(f.toString().contains("[Completed exceptionally]"));
+    }
+
+    /**
+     * A newly constructed CompletableFuture is incomplete, as indicated
+     * by methods isDone, isCancelled, and getNow
+     */
+    public void testConstructor() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+    }
+
+    /**
+     * complete completes normally, as indicated by methods isDone,
+     * isCancelled, join, get, and getNow
+     */
+    public void testComplete() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+        f.complete(one);
+        checkCompletedNormally(f, one);
+    }
+
+    /**
+     * completeExceptionally completes exceptionally, as indicated by
+     * methods isDone, isCancelled, join, get, and getNow
+     */
+    public void testCompleteExceptionally() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+        f.completeExceptionally(new CFException());
+        checkCompletedWithWrappedCFException(f);
     }
 
-    // XXXX Just a skeleton implementation for now.
-    public void testTODO() {
-        fail("Please add some real tests!");
+    /**
+     * cancel completes exceptionally and reports cancelled, as indicated by
+     * methods isDone, isCancelled, join, get, and getNow
+     */
+    public void testCancel() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+        assertTrue(f.cancel(true));
+        checkCancelled(f);
     }
 
+    /**
+     * obtrudeValue forces completion with given value
+     */
+    public void testObtrudeValue() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+        f.complete(one);
+        checkCompletedNormally(f, one);
+        f.obtrudeValue(three);
+        checkCompletedNormally(f, three);
+        f.obtrudeValue(two);
+        checkCompletedNormally(f, two);
+        f = new CompletableFuture<>();
+        f.obtrudeValue(three);
+        checkCompletedNormally(f, three);
+        f.obtrudeValue(null);
+        checkCompletedNormally(f, null);
+        f = new CompletableFuture<>();
+        f.completeExceptionally(new CFException());
+        f.obtrudeValue(four);
+        checkCompletedNormally(f, four);
+    }
+
+    /**
+     * obtrudeException forces completion with given exception
+     */
+    public void testObtrudeException() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        checkIncomplete(f);
+        f.complete(one);
+        checkCompletedNormally(f, one);
+        f.obtrudeException(new CFException());
+        checkCompletedWithWrappedCFException(f);
+        f = new CompletableFuture<>();
+        f.obtrudeException(new CFException());
+        checkCompletedWithWrappedCFException(f);
+        f = new CompletableFuture<>();
+        f.completeExceptionally(new CFException());
+        f.obtrudeValue(four);
+        checkCompletedNormally(f, four);
+        f.obtrudeException(new CFException());
+        checkCompletedWithWrappedCFException(f);
+    }
+
+    /**
+     * getNumberOfDependents returns number of dependent tasks
+     */
+    public void testGetNumberOfDependents() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        assertEquals(0, f.getNumberOfDependents());
+        CompletableFuture g = f.thenRun(new Noop(ExecutionMode.DEFAULT));
+        assertEquals(1, f.getNumberOfDependents());
+        assertEquals(0, g.getNumberOfDependents());
+        CompletableFuture h = f.thenRun(new Noop(ExecutionMode.DEFAULT));
+        assertEquals(2, f.getNumberOfDependents());
+        f.complete(1);
+        checkCompletedNormally(g, null);
+        assertEquals(0, f.getNumberOfDependents());
+        assertEquals(0, g.getNumberOfDependents());
+    }
+
+    /**
+     * toString indicates current completion state
+     */
     public void testToString() {
         CompletableFuture<String> f;
 
@@ -80,19 +313,2508 @@ public class CompletableFutureTest exten
     }
 
     /**
+     * completedFuture returns a completed CompletableFuture with given value
+     */
+    public void testCompletedFuture() {
+        CompletableFuture<String> f = CompletableFuture.completedFuture("test");
+        checkCompletedNormally(f, "test");
+    }
+
+    abstract class CheckedAction {
+        int invocationCount = 0;
+        final ExecutionMode m;
+        CheckedAction(ExecutionMode m) { this.m = m; }
+        void invoked() {
+            m.checkExecutionMode();
+            assertEquals(0, invocationCount++);
+        }
+        void assertNotInvoked() { assertEquals(0, invocationCount); }
+        void assertInvoked() { assertEquals(1, invocationCount); }
+    }
+
+    abstract class CheckedIntegerAction extends CheckedAction {
+        Integer value;
+        CheckedIntegerAction(ExecutionMode m) { super(m); }
+        void assertValue(Integer expected) {
+            assertInvoked();
+            assertEquals(expected, value);
+        }
+    }
+
+    class IntegerSupplier extends CheckedAction
+        implements Supplier<Integer>
+    {
+        final Integer value;
+        IntegerSupplier(ExecutionMode m, Integer value) {
+            super(m);
+            this.value = value;
+        }
+        public Integer get() {
+            invoked();
+            return value;
+        }
+    }
+
+    // A function that handles and produces null values as well.
+    static Integer inc(Integer x) {
+        return (x == null) ? null : x + 1;
+    }
+
+    class IncAction extends CheckedIntegerAction
+        implements Consumer<Integer>
+    {
+        IncAction(ExecutionMode m) { super(m); }
+        public void accept(Integer x) {
+            invoked();
+            value = inc(x);
+        }
+    }
+
+    class IncFunction extends CheckedIntegerAction
+        implements Function<Integer,Integer>
+    {
+        IncFunction(ExecutionMode m) { super(m); }
+        public Integer apply(Integer x) {
+            invoked();
+            return value = inc(x);
+        }
+    }
+
+    // Choose non-commutative actions for better coverage
+    // A non-commutative function that handles and produces null values as well.
+    static Integer subtract(Integer x, Integer y) {
+        return (x == null && y == null) ? null :
+            ((x == null) ? 42 : x.intValue())
+            - ((y == null) ? 99 : y.intValue());
+    }
+
+    class SubtractAction extends CheckedIntegerAction
+        implements BiConsumer<Integer, Integer>
+    {
+        SubtractAction(ExecutionMode m) { super(m); }
+        public void accept(Integer x, Integer y) {
+            invoked();
+            value = subtract(x, y);
+        }
+    }
+
+    class SubtractFunction extends CheckedIntegerAction
+        implements BiFunction<Integer, Integer, Integer>
+    {
+        SubtractFunction(ExecutionMode m) { super(m); }
+        public Integer apply(Integer x, Integer y) {
+            invoked();
+            return value = subtract(x, y);
+        }
+    }
+
+    class Noop extends CheckedAction implements Runnable {
+        Noop(ExecutionMode m) { super(m); }
+        public void run() {
+            invoked();
+        }
+    }
+
+    class FailingSupplier extends CheckedAction
+        implements Supplier<Integer>
+    {
+        FailingSupplier(ExecutionMode m) { super(m); }
+        public Integer get() {
+            invoked();
+            throw new CFException();
+        }
+    }
+
+    class FailingConsumer extends CheckedIntegerAction
+        implements Consumer<Integer>
+    {
+        FailingConsumer(ExecutionMode m) { super(m); }
+        public void accept(Integer x) {
+            invoked();
+            value = x;
+            throw new CFException();
+        }
+    }
+
+    class FailingBiConsumer extends CheckedIntegerAction
+        implements BiConsumer<Integer, Integer>
+    {
+        FailingBiConsumer(ExecutionMode m) { super(m); }
+        public void accept(Integer x, Integer y) {
+            invoked();
+            value = subtract(x, y);
+            throw new CFException();
+        }
+    }
+
+    class FailingFunction extends CheckedIntegerAction
+        implements Function<Integer, Integer>
+    {
+        FailingFunction(ExecutionMode m) { super(m); }
+        public Integer apply(Integer x) {
+            invoked();
+            value = x;
+            throw new CFException();
+        }
+    }
+
+    class FailingBiFunction extends CheckedIntegerAction
+        implements BiFunction<Integer, Integer, Integer>
+    {
+        FailingBiFunction(ExecutionMode m) { super(m); }
+        public Integer apply(Integer x, Integer y) {
+            invoked();
+            value = subtract(x, y);
+            throw new CFException();
+        }
+    }
+
+    class FailingRunnable extends CheckedAction implements Runnable {
+        FailingRunnable(ExecutionMode m) { super(m); }
+        public void run() {
+            invoked();
+            throw new CFException();
+        }
+    }
+
+
+    class CompletableFutureInc extends CheckedIntegerAction
+        implements Function<Integer, CompletableFuture<Integer>>
+    {
+        CompletableFutureInc(ExecutionMode m) { super(m); }
+        public CompletableFuture<Integer> apply(Integer x) {
+            invoked();
+            value = x;
+            CompletableFuture<Integer> f = new CompletableFuture<>();
+            f.complete(inc(x));
+            return f;
+        }
+    }
+
+    class FailingCompletableFutureFunction extends CheckedIntegerAction
+        implements Function<Integer, CompletableFuture<Integer>>
+    {
+        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
+        public CompletableFuture<Integer> apply(Integer x) {
+            invoked();
+            value = x;
+            throw new CFException();
+        }
+    }
+
+    // Used for explicit executor tests
+    static final class ThreadExecutor implements Executor {
+        final AtomicInteger count = new AtomicInteger(0);
+        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
+        static boolean startedCurrentThread() {
+            return Thread.currentThread().getThreadGroup() == tg;
+        }
+
+        public void execute(Runnable r) {
+            count.getAndIncrement();
+            new Thread(tg, r).start();
+        }
+    }
+
+    /**
+     * Permits the testing of parallel code for the 3 different
+     * execution modes without copy/pasting all the test methods.
+     */
+    enum ExecutionMode {
+        DEFAULT {
+            public void checkExecutionMode() {
+                assertFalse(ThreadExecutor.startedCurrentThread());
+                assertNull(ForkJoinTask.getPool());
+            }
+            public CompletableFuture<Void> runAsync(Runnable a) {
+                throw new UnsupportedOperationException();
+            }
+            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
+                throw new UnsupportedOperationException();
+            }
+            public <T> CompletableFuture<Void> thenRun
+                (CompletableFuture<T> f, Runnable a) {
+                return f.thenRun(a);
+            }
+            public <T> CompletableFuture<Void> thenAccept
+                (CompletableFuture<T> f, Consumer<? super T> a) {
+                return f.thenAccept(a);
+            }
+            public <T,U> CompletableFuture<U> thenApply
+                (CompletableFuture<T> f, Function<? super T,U> a) {
+                return f.thenApply(a);
+            }
+            public <T,U> CompletableFuture<U> thenCompose
+                (CompletableFuture<T> f,
+                 Function<? super T,? extends CompletionStage<U>> a) {
+                return f.thenCompose(a);
+            }
+            public <T,U> CompletableFuture<U> handle
+                (CompletableFuture<T> f,
+                 BiFunction<? super T,Throwable,? extends U> a) {
+                return f.handle(a);
+            }
+            public <T> CompletableFuture<T> whenComplete
+                (CompletableFuture<T> f,
+                 BiConsumer<? super T,? super Throwable> a) {
+                return f.whenComplete(a);
+            }
+            public <T,U> CompletableFuture<Void> runAfterBoth
+                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
+                return f.runAfterBoth(g, a);
+            }
+            public <T,U> CompletableFuture<Void> thenAcceptBoth
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiConsumer<? super T,? super U> a) {
+                return f.thenAcceptBoth(g, a);
+            }
+            public <T,U,V> CompletableFuture<V> thenCombine
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiFunction<? super T,? super U,? extends V> a) {
+                return f.thenCombine(g, a);
+            }
+            public <T> CompletableFuture<Void> runAfterEither
+                (CompletableFuture<T> f,
+                 CompletionStage<?> g,
+                 java.lang.Runnable a) {
+                return f.runAfterEither(g, a);
+            }
+            public <T> CompletableFuture<Void> acceptEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Consumer<? super T> a) {
+                return f.acceptEither(g, a);
+            }
+            public <T,U> CompletableFuture<U> applyToEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Function<? super T,U> a) {
+                return f.applyToEither(g, a);
+            }
+        },
+
+        ASYNC {
+            public void checkExecutionMode() {
+                assertSame(ForkJoinPool.commonPool(),
+                           ForkJoinTask.getPool());
+            }
+            public CompletableFuture<Void> runAsync(Runnable a) {
+                return CompletableFuture.runAsync(a);
+            }
+            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
+                return CompletableFuture.supplyAsync(a);
+            }
+            public <T> CompletableFuture<Void> thenRun
+                (CompletableFuture<T> f, Runnable a) {
+                return f.thenRunAsync(a);
+            }
+            public <T> CompletableFuture<Void> thenAccept
+                (CompletableFuture<T> f, Consumer<? super T> a) {
+                return f.thenAcceptAsync(a);
+            }
+            public <T,U> CompletableFuture<U> thenApply
+                (CompletableFuture<T> f, Function<? super T,U> a) {
+                return f.thenApplyAsync(a);
+            }
+            public <T,U> CompletableFuture<U> thenCompose
+                (CompletableFuture<T> f,
+                 Function<? super T,? extends CompletionStage<U>> a) {
+                return f.thenComposeAsync(a);
+            }
+            public <T,U> CompletableFuture<U> handle
+                (CompletableFuture<T> f,
+                 BiFunction<? super T,Throwable,? extends U> a) {
+                return f.handleAsync(a);
+            }
+            public <T> CompletableFuture<T> whenComplete
+                (CompletableFuture<T> f,
+                 BiConsumer<? super T,? super Throwable> a) {
+                return f.whenCompleteAsync(a);
+            }
+            public <T,U> CompletableFuture<Void> runAfterBoth
+                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
+                return f.runAfterBothAsync(g, a);
+            }
+            public <T,U> CompletableFuture<Void> thenAcceptBoth
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiConsumer<? super T,? super U> a) {
+                return f.thenAcceptBothAsync(g, a);
+            }
+            public <T,U,V> CompletableFuture<V> thenCombine
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiFunction<? super T,? super U,? extends V> a) {
+                return f.thenCombineAsync(g, a);
+            }
+            public <T> CompletableFuture<Void> runAfterEither
+                (CompletableFuture<T> f,
+                 CompletionStage<?> g,
+                 java.lang.Runnable a) {
+                return f.runAfterEitherAsync(g, a);
+            }
+            public <T> CompletableFuture<Void> acceptEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Consumer<? super T> a) {
+                return f.acceptEitherAsync(g, a);
+            }
+            public <T,U> CompletableFuture<U> applyToEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Function<? super T,U> a) {
+                return f.applyToEitherAsync(g, a);
+            }
+        },
+
+        EXECUTOR {
+            public void checkExecutionMode() {
+                assertTrue(ThreadExecutor.startedCurrentThread());
+            }
+            public CompletableFuture<Void> runAsync(Runnable a) {
+                return CompletableFuture.runAsync(a, new ThreadExecutor());
+            }
+            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
+                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
+            }
+            public <T> CompletableFuture<Void> thenRun
+                (CompletableFuture<T> f, Runnable a) {
+                return f.thenRunAsync(a, new ThreadExecutor());
+            }
+            public <T> CompletableFuture<Void> thenAccept
+                (CompletableFuture<T> f, Consumer<? super T> a) {
+                return f.thenAcceptAsync(a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<U> thenApply
+                (CompletableFuture<T> f, Function<? super T,U> a) {
+                return f.thenApplyAsync(a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<U> thenCompose
+                (CompletableFuture<T> f,
+                 Function<? super T,? extends CompletionStage<U>> a) {
+                return f.thenComposeAsync(a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<U> handle
+                (CompletableFuture<T> f,
+                 BiFunction<? super T,Throwable,? extends U> a) {
+                return f.handleAsync(a, new ThreadExecutor());
+            }
+            public <T> CompletableFuture<T> whenComplete
+                (CompletableFuture<T> f,
+                 BiConsumer<? super T,? super Throwable> a) {
+                return f.whenCompleteAsync(a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<Void> runAfterBoth
+                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
+                return f.runAfterBothAsync(g, a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<Void> thenAcceptBoth
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiConsumer<? super T,? super U> a) {
+                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
+            }
+            public <T,U,V> CompletableFuture<V> thenCombine
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends U> g,
+                 BiFunction<? super T,? super U,? extends V> a) {
+                return f.thenCombineAsync(g, a, new ThreadExecutor());
+            }
+            public <T> CompletableFuture<Void> runAfterEither
+                (CompletableFuture<T> f,
+                 CompletionStage<?> g,
+                 java.lang.Runnable a) {
+                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
+            }
+            public <T> CompletableFuture<Void> acceptEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Consumer<? super T> a) {
+                return f.acceptEitherAsync(g, a, new ThreadExecutor());
+            }
+            public <T,U> CompletableFuture<U> applyToEither
+                (CompletableFuture<T> f,
+                 CompletionStage<? extends T> g,
+                 Function<? super T,U> a) {
+                return f.applyToEitherAsync(g, a, new ThreadExecutor());
+            }
+        };
+
+        public abstract void checkExecutionMode();
+        public abstract CompletableFuture<Void> runAsync(Runnable a);
+        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
+        public abstract <T> CompletableFuture<Void> thenRun
+            (CompletableFuture<T> f, Runnable a);
+        public abstract <T> CompletableFuture<Void> thenAccept
+            (CompletableFuture<T> f, Consumer<? super T> a);
+        public abstract <T,U> CompletableFuture<U> thenApply
+            (CompletableFuture<T> f, Function<? super T,U> a);
+        public abstract <T,U> CompletableFuture<U> thenCompose
+            (CompletableFuture<T> f,
+             Function<? super T,? extends CompletionStage<U>> a);
+        public abstract <T,U> CompletableFuture<U> handle
+            (CompletableFuture<T> f,
+             BiFunction<? super T,Throwable,? extends U> a);
+        public abstract <T> CompletableFuture<T> whenComplete
+            (CompletableFuture<T> f,
+             BiConsumer<? super T,? super Throwable> a);
+        public abstract <T,U> CompletableFuture<Void> runAfterBoth
+            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
+        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
+            (CompletableFuture<T> f,
+             CompletionStage<? extends U> g,
+             BiConsumer<? super T,? super U> a);
+        public abstract <T,U,V> CompletableFuture<V> thenCombine
+            (CompletableFuture<T> f,
+             CompletionStage<? extends U> g,
+             BiFunction<? super T,? super U,? extends V> a);
+        public abstract <T> CompletableFuture<Void> runAfterEither
+            (CompletableFuture<T> f,
+             CompletionStage<?> g,
+             java.lang.Runnable a);
+        public abstract <T> CompletableFuture<Void> acceptEither
+            (CompletableFuture<T> f,
+             CompletionStage<? extends T> g,
+             Consumer<? super T> a);
+        public abstract <T,U> CompletableFuture<U> applyToEither
+            (CompletableFuture<T> f,
+             CompletionStage<? extends T> g,
+             Function<? super T,U> a);
+    }
+
+    /**
+     * exceptionally action is not invoked when source completes
+     * normally, and source result is propagated
+     */
+    public void testExceptionally_normalCompletion() {
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = f.exceptionally
+            ((Throwable t) -> {
+                // Should not be called
+                a.getAndIncrement();
+                throw new AssertionError();
+            });
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedNormally(g, v1);
+        checkCompletedNormally(f, v1);
+        assertEquals(0, a.get());
+    }}
+
+
+    /**
+     * exceptionally action completes with function value on source
+     * exception
+     */
+    public void testExceptionally_exceptionalCompletion() {
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Integer> g = f.exceptionally
+            ((Throwable t) -> {
+                ExecutionMode.DEFAULT.checkExecutionMode();
+                threadAssertSame(t, ex);
+                a.getAndIncrement();
+                return v1;
+            });
+        if (createIncomplete) f.completeExceptionally(ex);
+
+        checkCompletedNormally(g, v1);
+        assertEquals(1, a.get());
+    }}
+
+    public void testExceptionally_exceptionalCompletionActionFailed() {
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex1 = new CFException();
+        final CFException ex2 = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.completeExceptionally(ex1);
+        final CompletableFuture<Integer> g = f.exceptionally
+            ((Throwable t) -> {
+                ExecutionMode.DEFAULT.checkExecutionMode();
+                threadAssertSame(t, ex1);
+                a.getAndIncrement();
+                throw ex2;
+            });
+        if (createIncomplete) f.completeExceptionally(ex1);
+
+        checkCompletedWithWrappedCFException(g, ex2);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * handle action completes normally with function value on normal
+     * completion of source
+     */
+    public void testHandle_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final AtomicInteger a = new AtomicInteger(0);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.handle
+            (f,
+             (Integer x, Throwable t) -> {
+                m.checkExecutionMode();
+                threadAssertSame(x, v1);
+                threadAssertNull(t);
+                a.getAndIncrement();
+                return inc(v1);
+            });
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedNormally(g, inc(v1));
+        checkCompletedNormally(f, v1);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * handle action completes normally with function value on
+     * exceptional completion of source
+     */
+    public void testHandle_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex = new CFException();
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Integer> g = m.handle
+            (f,
+             (Integer x, Throwable t) -> {
+                m.checkExecutionMode();
+                threadAssertNull(x);
+                threadAssertSame(t, ex);
+                a.getAndIncrement();
+                return v1;
+            });
+        if (createIncomplete) f.completeExceptionally(ex);
+
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCFException(f, ex);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * handle action completes normally with function value on
+     * cancelled source
+     */
+    public void testHandle_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final AtomicInteger a = new AtomicInteger(0);
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Integer> g = m.handle
+            (f,
+             (Integer x, Throwable t) -> {
+                m.checkExecutionMode();
+                threadAssertNull(x);
+                threadAssertTrue(t instanceof CancellationException);
+                a.getAndIncrement();
+                return v1;
+            });
+        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+
+        checkCompletedNormally(g, v1);
+        checkCancelled(f);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * handle result completes exceptionally if action does
+     */
+    public void testHandle_sourceFailedActionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex1 = new CFException();
+        final CFException ex2 = new CFException();
+        if (!createIncomplete) f.completeExceptionally(ex1);
+        final CompletableFuture<Integer> g = m.handle
+            (f,
+             (Integer x, Throwable t) -> {
+                m.checkExecutionMode();
+                threadAssertNull(x);
+                threadAssertSame(ex1, t);
+                a.getAndIncrement();
+                throw ex2;
+            });
+        if (createIncomplete) f.completeExceptionally(ex1);
+
+        checkCompletedWithWrappedCFException(g, ex2);
+        checkCompletedWithWrappedCFException(f, ex1);
+        assertEquals(1, a.get());
+    }}
+
+    public void testHandle_sourceCompletedNormallyActionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex = new CFException();
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.handle
+            (f,
+             (Integer x, Throwable t) -> {
+                m.checkExecutionMode();
+                threadAssertSame(x, v1);
+                threadAssertNull(t);
+                a.getAndIncrement();
+                throw ex;
+            });
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedNormally(f, v1);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * runAsync completes after running Runnable
+     */
+    public void testRunAsync_normalCompletion() {
+        ExecutionMode[] executionModes = {
+            ExecutionMode.ASYNC,
+            ExecutionMode.EXECUTOR,
+        };
+        for (ExecutionMode m : executionModes)
+    {
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> f = m.runAsync(r);
+        assertNull(f.join());
+        checkCompletedNormally(f, null);
+        r.assertInvoked();
+    }}
+
+    /**
+     * failing runAsync completes exceptionally after running Runnable
+     */
+    public void testRunAsync_exceptionalCompletion() {
+        ExecutionMode[] executionModes = {
+            ExecutionMode.ASYNC,
+            ExecutionMode.EXECUTOR,
+        };
+        for (ExecutionMode m : executionModes)
+    {
+        final FailingRunnable r = new FailingRunnable(m);
+        final CompletableFuture<Void> f = m.runAsync(r);
+        checkCompletedWithWrappedCFException(f);
+        r.assertInvoked();
+    }}
+
+    /**
+     * supplyAsync completes with result of supplier
+     */
+    public void testSupplyAsync_normalCompletion() {
+        ExecutionMode[] executionModes = {
+            ExecutionMode.ASYNC,
+            ExecutionMode.EXECUTOR,
+        };
+        for (ExecutionMode m : executionModes)
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final IntegerSupplier r = new IntegerSupplier(m, v1);
+        final CompletableFuture<Integer> f = m.supplyAsync(r);
+        assertSame(v1, f.join());
+        checkCompletedNormally(f, v1);
+        r.assertInvoked();
+    }}
+
+    /**
+     * Failing supplyAsync completes exceptionally
+     */
+    public void testSupplyAsync_exceptionalCompletion() {
+        ExecutionMode[] executionModes = {
+            ExecutionMode.ASYNC,
+            ExecutionMode.EXECUTOR,
+        };
+        for (ExecutionMode m : executionModes)
+    {
+        FailingSupplier r = new FailingSupplier(m);
+        CompletableFuture<Integer> f = m.supplyAsync(r);
+        checkCompletedWithWrappedCFException(f);
+        r.assertInvoked();
+    }}
+
+    // seq completion methods
+
+    /**
+     * thenRun result completes normally after normal completion of source
+     */
+    public void testThenRun_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Void> g = m.thenRun(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedNormally(g, null);
+        checkCompletedNormally(f, v1);
+        r.assertInvoked();
+    }}
+
+    /**
+     * thenRun result completes exceptionally after exceptional
+     * completion of source
+     */
+    public void testThenRun_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Void> g = m.thenRun(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedWithWrappedCFException(f, ex);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenRun result completes exceptionally if source cancelled
+     */
+    public void testThenRun_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Void> g = m.thenRun(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            assertTrue(f.cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(g);
+        checkCancelled(f);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenRun result completes exceptionally if action does
+     */
+    public void testThenRun_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final FailingRunnable r = new FailingRunnable(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Void> g = m.thenRun(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedWithWrappedCFException(g);
+        checkCompletedNormally(f, v1);
+    }}
+
+    /**
+     * thenApply result completes normally after normal completion of source
+     */
+    public void testThenApply_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncFunction r = new IncFunction(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.thenApply(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedNormally(g, inc(v1));
+        checkCompletedNormally(f, v1);
+        r.assertInvoked();
+    }}
+
+    /**
+     * thenApply result completes exceptionally after exceptional
+     * completion of source
+     */
+    public void testThenApply_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncFunction r = new IncFunction(m);
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Integer> g = m.thenApply(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedWithWrappedCFException(f, ex);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenApply result completes exceptionally if source cancelled
+     */
+    public void testThenApply_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncFunction r = new IncFunction(m);
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Integer> g = m.thenApply(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            assertTrue(f.cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(g);
+        checkCancelled(f);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenApply result completes exceptionally if action does
+     */
+    public void testThenApply_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final FailingFunction r = new FailingFunction(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.thenApply(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedWithWrappedCFException(g);
+        checkCompletedNormally(f, v1);
+    }}
+
+    /**
+     * thenAccept result completes normally after normal completion of source
+     */
+    public void testThenAccept_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncAction r = new IncAction(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Void> g = m.thenAccept(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedNormally(g, null);
+        checkCompletedNormally(f, v1);
+        r.assertInvoked();
+        r.assertValue(inc(v1));
+    }}
+
+    /**
+     * thenAccept result completes exceptionally after exceptional
+     * completion of source
+     */
+    public void testThenAccept_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncAction r = new IncAction(m);
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Void> g = m.thenAccept(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedWithWrappedCFException(f, ex);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenAccept result completes exceptionally if source cancelled
+     */
+    public void testThenAccept_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final IncAction r = new IncAction(m);
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Void> g = m.thenAccept(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            assertTrue(f.cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(g);
+        checkCancelled(f);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenAccept result completes exceptionally if action does
+     */
+    public void testThenAccept_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final FailingConsumer r = new FailingConsumer(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Void> g = m.thenAccept(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            f.complete(v1);
+        }
+
+        checkCompletedWithWrappedCFException(g);
+        checkCompletedNormally(f, v1);
+    }}
+
+    /**
+     * thenCombine result completes normally after normal completion
+     * of sources
+     */
+    public void testThenCombine_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final SubtractFunction r = new SubtractFunction(m);
+
+        if (fFirst) f.complete(v1); else g.complete(v2);
+        if (!createIncomplete)
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            r.assertNotInvoked();
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        }
+
+        checkCompletedNormally(h, subtract(v1, v2));
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        r.assertInvoked();
+    }}
+
+    /**
+     * thenCombine result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testThenCombine_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final CFException ex = new CFException();
+        final SubtractFunction r = new SubtractFunction(m);
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            (!fFirst ? f : g).completeExceptionally(ex);
+        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            (!fFirst ? f : g).completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(h, ex);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
+    }}
+
+    /**
+     * thenCombine result completes exceptionally if either source cancelled
+     */
+    public void testThenCombine_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final SubtractFunction r = new SubtractFunction(m);
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(h);
+        checkCancelled(!fFirst ? f : g);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+    }}
+
+    /**
+     * thenCombine result completes exceptionally if action does
+     */
+    public void testThenCombine_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingBiFunction r = new FailingBiFunction(m);
+        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
+
+        if (fFirst) {
+            f.complete(v1);
+            g.complete(v2);
+        } else {
+            g.complete(v2);
+            f.complete(v1);
+        }
+
+        checkCompletedWithWrappedCFException(h);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * thenAcceptBoth result completes normally after normal
+     * completion of sources
+     */
+    public void testThenAcceptBoth_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final SubtractAction r = new SubtractAction(m);
+
+        if (fFirst) f.complete(v1); else g.complete(v2);
+        if (!createIncomplete)
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            r.assertNotInvoked();
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        }
+
+        checkCompletedNormally(h, null);
+        r.assertValue(subtract(v1, v2));
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * thenAcceptBoth result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testThenAcceptBoth_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final CFException ex = new CFException();
+        final SubtractAction r = new SubtractAction(m);
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            (!fFirst ? f : g).completeExceptionally(ex);
+        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            (!fFirst ? f : g).completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(h, ex);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
+    }}
+
+    /**
+     * thenAcceptBoth result completes exceptionally if either source cancelled
+     */
+    public void testThenAcceptBoth_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final SubtractAction r = new SubtractAction(m);
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(h);
+        checkCancelled(!fFirst ? f : g);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+    }}
+
+    /**
+     * thenAcceptBoth result completes exceptionally if action does
+     */
+    public void testThenAcceptBoth_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingBiConsumer r = new FailingBiConsumer(m);
+        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
+
+        if (fFirst) {
+            f.complete(v1);
+            g.complete(v2);
+        } else {
+            g.complete(v2);
+            f.complete(v1);
+        }
+
+        checkCompletedWithWrappedCFException(h);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * runAfterBoth result completes normally after normal
+     * completion of sources
+     */
+    public void testRunAfterBoth_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+
+        if (fFirst) f.complete(v1); else g.complete(v2);
+        if (!createIncomplete)
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            r.assertNotInvoked();
+            if (!fFirst) f.complete(v1); else g.complete(v2);
+        }
+
+        checkCompletedNormally(h, null);
+        r.assertInvoked();
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * runAfterBoth result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testRunAfterBoth_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final CFException ex = new CFException();
+        final Noop r = new Noop(m);
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            (!fFirst ? f : g).completeExceptionally(ex);
+        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            (!fFirst ? f : g).completeExceptionally(ex);
+        }
+
+        checkCompletedWithWrappedCFException(h, ex);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
+    }}
+
+    /**
+     * runAfterBoth result completes exceptionally if either source cancelled
+     */
+    public void testRunAfterBoth_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+
+
+        (fFirst ? f : g).complete(v1);
+        if (!createIncomplete)
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
+        if (createIncomplete) {
+            checkIncomplete(h);
+            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(h);
+        checkCancelled(!fFirst ? f : g);
+        r.assertNotInvoked();
+        checkCompletedNormally(fFirst ? f : g, v1);
+    }}
+
+    /**
+     * runAfterBoth result completes exceptionally if action does
+     */
+    public void testRunAfterBoth_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean fFirst : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingRunnable r1 = new FailingRunnable(m);
+        final FailingRunnable r2 = new FailingRunnable(m);
+
+        CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
+        if (fFirst) {
+            f.complete(v1);
+            g.complete(v2);
+        } else {
+            g.complete(v2);
+            f.complete(v1);
+        }
+        CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
+
+        checkCompletedWithWrappedCFException(h1);
+        checkCompletedWithWrappedCFException(h2);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * applyToEither result completes normally after normal completion
+     * of either source
+     */
+    public void testApplyToEither_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final IncFunction[] rs = new IncFunction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
+
+        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
+        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.complete(v1);
+        checkCompletedNormally(h0, inc(v1));
+        checkCompletedNormally(h1, inc(v1));
+        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
+        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
+        checkCompletedNormally(h2, inc(v1));
+        checkCompletedNormally(h3, inc(v1));
+        g.complete(v2);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
+        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
+        rs[4].assertValue(h4.join());
+        rs[5].assertValue(h5.join());
+        assertTrue(Objects.equals(inc(v1), h4.join()) ||
+                   Objects.equals(inc(v2), h4.join()));
+        assertTrue(Objects.equals(inc(v1), h5.join()) ||
+                   Objects.equals(inc(v2), h5.join()));
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        checkCompletedNormally(h0, inc(v1));
+        checkCompletedNormally(h1, inc(v1));
+        checkCompletedNormally(h2, inc(v1));
+        checkCompletedNormally(h3, inc(v1));
+        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
+    }}
+
+    /**
+     * applyToEither result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testApplyToEither_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final CFException ex = new CFException();
+        final IncFunction[] rs = new IncFunction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
+
+        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
+        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.completeExceptionally(ex);
+        checkCompletedWithWrappedCFException(h0, ex);
+        checkCompletedWithWrappedCFException(h1, ex);
+        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
+        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
+        checkCompletedWithWrappedCFException(h2, ex);
+        checkCompletedWithWrappedCFException(h3, ex);
+        g.complete(v1);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
+        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
+        try {
+            assertEquals(inc(v1), h4.join());
+            rs[4].assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h4, ex);
+            rs[4].assertNotInvoked();
+        }
+        try {
+            assertEquals(inc(v1), h5.join());
+            rs[5].assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h5, ex);
+            rs[5].assertNotInvoked();
+        }
+
+        checkCompletedWithWrappedCFException(f, ex);
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCFException(h0, ex);
+        checkCompletedWithWrappedCFException(h1, ex);
+        checkCompletedWithWrappedCFException(h2, ex);
+        checkCompletedWithWrappedCFException(h3, ex);
+        checkCompletedWithWrappedCFException(h4, ex);
+        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
+    }}
+
+    /**
+     * applyToEither result completes exceptionally if either source cancelled
+     */
+    public void testApplyToEither_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final IncFunction[] rs = new IncFunction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
+
+        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
+        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.cancel(mayInterruptIfRunning);
+        checkCompletedWithWrappedCancellationException(h0);
+        checkCompletedWithWrappedCancellationException(h1);
+        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
+        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
+        checkCompletedWithWrappedCancellationException(h2);
+        checkCompletedWithWrappedCancellationException(h3);
+        g.complete(v1);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
+        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
+        try {
+            assertEquals(inc(v1), h4.join());
+            rs[4].assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h4);
+            rs[4].assertNotInvoked();
+        }
+        try {
+            assertEquals(inc(v1), h5.join());
+            rs[5].assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h5);
+            rs[5].assertNotInvoked();
+        }
+
+        checkCancelled(f);
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCancellationException(h0);
+        checkCompletedWithWrappedCancellationException(h1);
+        checkCompletedWithWrappedCancellationException(h2);
+        checkCompletedWithWrappedCancellationException(h3);
+        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
+    }}
+
+    /**
+     * applyToEither result completes exceptionally if action does
+     */
+    public void testApplyToEither_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingFunction[] rs = new FailingFunction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
+
+        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
+        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
+        f.complete(v1);
+        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
+        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
+        checkCompletedWithWrappedCFException(h0);
+        checkCompletedWithWrappedCFException(h1);
+        checkCompletedWithWrappedCFException(h2);
+        checkCompletedWithWrappedCFException(h3);
+        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
+
+        g.complete(v2);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
+        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
+
+        checkCompletedWithWrappedCFException(h4);
+        assertTrue(Objects.equals(v1, rs[4].value) ||
+                   Objects.equals(v2, rs[4].value));
+        checkCompletedWithWrappedCFException(h5);
+        assertTrue(Objects.equals(v1, rs[5].value) ||
+                   Objects.equals(v2, rs[5].value));
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * acceptEither result completes normally after normal completion
+     * of either source
+     */
+    public void testAcceptEither_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final IncAction[] rs = new IncAction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncAction(m);
+
+        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
+        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.complete(v1);
+        checkCompletedNormally(h0, null);
+        checkCompletedNormally(h1, null);
+        rs[0].assertValue(inc(v1));
+        rs[1].assertValue(inc(v1));
+        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
+        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
+        checkCompletedNormally(h2, null);
+        checkCompletedNormally(h3, null);
+        rs[2].assertValue(inc(v1));
+        rs[3].assertValue(inc(v1));
+        g.complete(v2);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
+        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
+        checkCompletedNormally(h4, null);
+        checkCompletedNormally(h5, null);
+        assertTrue(Objects.equals(inc(v1), rs[4].value) ||
+                   Objects.equals(inc(v2), rs[4].value));
+        assertTrue(Objects.equals(inc(v1), rs[5].value) ||
+                   Objects.equals(inc(v2), rs[5].value));
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        checkCompletedNormally(h0, null);
+        checkCompletedNormally(h1, null);
+        checkCompletedNormally(h2, null);
+        checkCompletedNormally(h3, null);
+        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
+    }}
+
+    /**
+     * acceptEither result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testAcceptEither_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final CFException ex = new CFException();
+        final IncAction[] rs = new IncAction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncAction(m);
+
+        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
+        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.completeExceptionally(ex);
+        checkCompletedWithWrappedCFException(h0, ex);
+        checkCompletedWithWrappedCFException(h1, ex);
+        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
+        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
+        checkCompletedWithWrappedCFException(h2, ex);
+        checkCompletedWithWrappedCFException(h3, ex);
+
+        g.complete(v1);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
+        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
+        try {
+            assertNull(h4.join());
+            rs[4].assertValue(inc(v1));
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h4, ex);
+            rs[4].assertNotInvoked();
+        }
+        try {
+            assertNull(h5.join());
+            rs[5].assertValue(inc(v1));
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h5, ex);
+            rs[5].assertNotInvoked();
+        }
+
+        checkCompletedWithWrappedCFException(f, ex);
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCFException(h0, ex);
+        checkCompletedWithWrappedCFException(h1, ex);
+        checkCompletedWithWrappedCFException(h2, ex);
+        checkCompletedWithWrappedCFException(h3, ex);
+        checkCompletedWithWrappedCFException(h4, ex);
+        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
+    }}
+
+    /**
+     * acceptEither result completes exceptionally if either source cancelled
+     */
+    public void testAcceptEither_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final IncAction[] rs = new IncAction[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new IncAction(m);
+
+        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
+        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
+        checkIncomplete(h0);
+        checkIncomplete(h1);
+        rs[0].assertNotInvoked();
+        rs[1].assertNotInvoked();
+        f.cancel(mayInterruptIfRunning);
+        checkCompletedWithWrappedCancellationException(h0);
+        checkCompletedWithWrappedCancellationException(h1);
+        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
+        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
+        checkCompletedWithWrappedCancellationException(h2);
+        checkCompletedWithWrappedCancellationException(h3);
+
+        g.complete(v1);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
+        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
+        try {
+            assertNull(h4.join());
+            rs[4].assertValue(inc(v1));
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h4);
+            rs[4].assertNotInvoked();
+        }
+        try {
+            assertNull(h5.join());
+            rs[5].assertValue(inc(v1));
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h5);
+            rs[5].assertNotInvoked();
+        }
+
+        checkCancelled(f);
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCancellationException(h0);
+        checkCompletedWithWrappedCancellationException(h1);
+        checkCompletedWithWrappedCancellationException(h2);
+        checkCompletedWithWrappedCancellationException(h3);
+        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
+    }}
+
+    /**
+     * acceptEither result completes exceptionally if action does
+     */
+    public void testAcceptEither_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingConsumer[] rs = new FailingConsumer[6];
+        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
+
+        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
+        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
+        f.complete(v1);
+        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
+        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
+        checkCompletedWithWrappedCFException(h0);
+        checkCompletedWithWrappedCFException(h1);
+        checkCompletedWithWrappedCFException(h2);
+        checkCompletedWithWrappedCFException(h3);
+        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
+
+        g.complete(v2);
+
+        // unspecified behavior - both source completions available
+        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
+        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
+
+        checkCompletedWithWrappedCFException(h4);
+        assertTrue(Objects.equals(v1, rs[4].value) ||
+                   Objects.equals(v2, rs[4].value));
+        checkCompletedWithWrappedCFException(h5);
+        assertTrue(Objects.equals(v1, rs[5].value) ||
+                   Objects.equals(v2, rs[5].value));
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * runAfterEither result completes normally after normal completion
+     * of either source
+     */
+    public void testRunAfterEither_normalCompletion1() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        f.complete(v1);
+        checkCompletedNormally(h, null);
+        r.assertInvoked();
+        g.complete(v2);
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        checkCompletedNormally(h, null);
+        r.assertInvoked();
+    }}
+
+    public void testRunAfterEither_normalCompletion2() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        g.complete(v2);
+        checkCompletedNormally(h, null);
+        r.assertInvoked();
+        f.complete(v1);
+
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        checkCompletedNormally(h, null);
+        r.assertInvoked();
+        }}
+
+    public void testRunAfterEither_normalCompletion3() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+
+        f.complete(v1);
+        g.complete(v2);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        checkCompletedNormally(h, null);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+        r.assertInvoked();
+    }}
+
+    /**
+     * runAfterEither result completes exceptionally after exceptional
+     * completion of either source
+     */
+    public void testRunAfterEither_exceptionalCompletion1() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+        final CFException ex = new CFException();
+
+        f.completeExceptionally(ex);
+        checkCompletedWithWrappedCFException(h, ex);
+        g.complete(v1);
+
+        r.assertNotInvoked();
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCFException(f, ex);
+        checkCompletedWithWrappedCFException(h, ex);
+    }}
+
+    public void testRunAfterEither_exceptionalCompletion2() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+        final CFException ex = new CFException();
+
+        g.completeExceptionally(ex);
+        checkCompletedWithWrappedCFException(h, ex);
+        f.complete(v1);
+
+        r.assertNotInvoked();
+        checkCompletedNormally(f, v1);
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedWithWrappedCFException(h, ex);
+    }}
+
+    public void testRunAfterEither_exceptionalCompletion3() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CFException ex = new CFException();
+
+        g.completeExceptionally(ex);
+        f.complete(v1);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        // unspecified behavior
+        Integer v;
+        try {
+            assertNull(h.join());
+            r.assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h, ex);
+            r.assertNotInvoked();
+        }
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedNormally(f, v1);
+    }}
+
+    public void testRunAfterEither_exceptionalCompletion4() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CFException ex = new CFException();
+
+        f.completeExceptionally(ex);
+        g.complete(v1);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        // unspecified behavior
+        Integer v;
+        try {
+            assertNull(h.join());
+            r.assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCFException(h, ex);
+            r.assertNotInvoked();
+        }
+
+        checkCompletedWithWrappedCFException(f, ex);
+        checkCompletedNormally(g, v1);
+    }}
+
+    /**
+     * runAfterEither result completes exceptionally if action does
+     */
+    public void testRunAfterEither_actionFailed1() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingRunnable r = new FailingRunnable(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        f.complete(v1);
+        checkCompletedWithWrappedCFException(h);
+        g.complete(v2);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    public void testRunAfterEither_actionFailed2() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+        for (Integer v2 : new Integer[] { 2, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final FailingRunnable r = new FailingRunnable(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        g.complete(v2);
+        checkCompletedWithWrappedCFException(h);
+        f.complete(v1);
+        checkCompletedNormally(f, v1);
+        checkCompletedNormally(g, v2);
+    }}
+
+    /**
+     * runAfterEither result completes exceptionally if either source cancelled
+     */
+    public void testRunAfterEither_sourceCancelled1() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        assertTrue(f.cancel(mayInterruptIfRunning));
+        checkCompletedWithWrappedCancellationException(h);
+        g.complete(v1);
+
+        checkCancelled(f);
+        r.assertNotInvoked();
+        checkCompletedNormally(g, v1);
+        checkCompletedWithWrappedCancellationException(h);
+    }}
+
+    public void testRunAfterEither_sourceCancelled2() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        assertTrue(g.cancel(mayInterruptIfRunning));
+        checkCompletedWithWrappedCancellationException(h);
+        f.complete(v1);
+
+        checkCancelled(g);
+        r.assertNotInvoked();
+        checkCompletedNormally(f, v1);
+        checkCompletedWithWrappedCancellationException(h);
+    }}
+
+    public void testRunAfterEither_sourceCancelled3() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+
+        assertTrue(g.cancel(mayInterruptIfRunning));
+        f.complete(v1);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        // unspecified behavior
+        Integer v;
+        try {
+            assertNull(h.join());
+            r.assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h);
+            r.assertNotInvoked();
+        }
+
+        checkCancelled(g);
+        checkCompletedNormally(f, v1);
+    }}
+
+    public void testRunAfterEither_sourceCancelled4() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFuture<Integer> g = new CompletableFuture<>();
+        final Noop r = new Noop(m);
+
+        assertTrue(f.cancel(mayInterruptIfRunning));
+        g.complete(v1);
+        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
+
+        // unspecified behavior
+        Integer v;
+        try {
+            assertNull(h.join());
+            r.assertInvoked();
+        } catch (CompletionException ok) {
+            checkCompletedWithWrappedCancellationException(h);
+            r.assertNotInvoked();
+        }
+
+        checkCancelled(f);
+        checkCompletedNormally(g, v1);
+    }}
+
+    /**
+     * thenCompose result completes normally after normal completion of source
+     */
+    public void testThenCompose_normalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFutureInc r = new CompletableFutureInc(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.thenCompose(f, r);
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedNormally(g, inc(v1));
+        checkCompletedNormally(f, v1);
+        r.assertInvoked();
+    }}
+
+    /**
+     * thenCompose result completes exceptionally after exceptional
+     * completion of source
+     */
+    public void testThenCompose_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final CFException ex = new CFException();
+        final CompletableFutureInc r = new CompletableFutureInc(m);
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Integer> g = m.thenCompose(f, r);
+        if (createIncomplete) f.completeExceptionally(ex);
+
+        checkCompletedWithWrappedCFException(g, ex);
+        checkCompletedWithWrappedCFException(f, ex);
+        r.assertNotInvoked();
+    }}
+
+    /**
+     * thenCompose result completes exceptionally if action does
+     */
+    public void testThenCompose_actionFailed() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final FailingCompletableFutureFunction r
+            = new FailingCompletableFutureFunction(m);
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.thenCompose(f, r);
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedWithWrappedCFException(g);
+        checkCompletedNormally(f, v1);
+    }}
+
+    /**
+     * thenCompose result completes exceptionally if source cancelled
+     */
+    public void testThenCompose_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+    {
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        final CompletableFutureInc r = new CompletableFutureInc(m);
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Integer> g = m.thenCompose(f, r);
+        if (createIncomplete) {
+            checkIncomplete(g);
+            assertTrue(f.cancel(mayInterruptIfRunning));
+        }
+
+        checkCompletedWithWrappedCancellationException(g);
+        checkCancelled(f);
+    }}
+
+    // other static methods
+
+    /**
      * allOf(no component futures) returns a future completed normally
      * with the value null
      */
     public void testAllOf_empty() throws Exception {
-        CompletableFuture<?> f = CompletableFuture.allOf();
+        CompletableFuture<Void> f = CompletableFuture.allOf();
         checkCompletedNormally(f, null);
     }
 
     /**
+     * allOf returns a future completed normally with the value null
+     * when all components complete normally
+     */
+    public void testAllOf_normal() throws Exception {
+        for (int k = 1; k < 20; ++k) {
+            CompletableFuture<Integer>[] fs
+                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
+            for (int i = 0; i < k; ++i)
+                fs[i] = new CompletableFuture<>();
+            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
+            for (int i = 0; i < k; ++i) {
+                checkIncomplete(f);
+                checkIncomplete(CompletableFuture.allOf(fs));
+                fs[i].complete(one);
+            }
+            checkCompletedNormally(f, null);
+            checkCompletedNormally(CompletableFuture.allOf(fs), null);
+        }
+    }
+
+    public void testAllOf_backwards() throws Exception {
+        for (int k = 1; k < 20; ++k) {
+            CompletableFuture<Integer>[] fs
+                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
+            for (int i = 0; i < k; ++i)
+                fs[i] = new CompletableFuture<>();
+            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
+            for (int i = k - 1; i >= 0; i--) {
+                checkIncomplete(f);
+                checkIncomplete(CompletableFuture.allOf(fs));
+                fs[i].complete(one);
+            }
+            checkCompletedNormally(f, null);
+            checkCompletedNormally(CompletableFuture.allOf(fs), null);
+        }
+    }
+
+    /**
      * anyOf(no component futures) returns an incomplete future
      */
     public void testAnyOf_empty() throws Exception {
-        CompletableFuture<?> f = CompletableFuture.anyOf();
+        CompletableFuture<Object> f = CompletableFuture.anyOf();
         checkIncomplete(f);
     }
+
+    /**
+     * anyOf returns a future completed normally with a value when
+     * a component future does
+     */
+    public void testAnyOf_normal() throws Exception {
+        for (int k = 0; k < 10; ++k) {
+            CompletableFuture[] fs = new CompletableFuture[k];
+            for (int i = 0; i < k; ++i)
+                fs[i] = new CompletableFuture<>();
+            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
+            checkIncomplete(f);
+            for (int i = 0; i < k; ++i) {
+                fs[i].complete(one);
+                checkCompletedNormally(f, one);
+                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
+            }
+        }
+    }
+
+    /**
+     * anyOf result completes exceptionally when any component does.
+     */
+    public void testAnyOf_exceptional() throws Exception {
+        for (int k = 0; k < 10; ++k) {
+            CompletableFuture[] fs = new CompletableFuture[k];
+            for (int i = 0; i < k; ++i)
+                fs[i] = new CompletableFuture<>();
+            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
+            checkIncomplete(f);
+            for (int i = 0; i < k; ++i) {
+                fs[i].completeExceptionally(new CFException());
+                checkCompletedWithWrappedCFException(f);
+                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
+            }
+        }
+    }
+
+    /**
+     * Completion methods throw NullPointerException with null arguments
+     */
+    public void testNPE() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        CompletableFuture<Integer> g = new CompletableFuture<>();
+        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
+        CompletableFuture<?> h;
+        ThreadExecutor exec = new ThreadExecutor();
+
+        Runnable[] throwingActions = {
+            () -> CompletableFuture.supplyAsync(null),
+            () -> CompletableFuture.supplyAsync(null, exec),
+            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.DEFAULT, 42), null),
+
+            () -> CompletableFuture.runAsync(null),
+            () -> CompletableFuture.runAsync(null, exec),
+            () -> CompletableFuture.runAsync(() -> {}, null),
+
+            () -> f.completeExceptionally(null),
+
+            () -> f.thenApply(null),
+            () -> f.thenApplyAsync(null),
+            () -> f.thenApplyAsync((x) -> x, null),
+            () -> f.thenApplyAsync(null, exec),
+
+            () -> f.thenAccept(null),
+            () -> f.thenAcceptAsync(null),
+            () -> f.thenAcceptAsync((x) -> {} , null),
+            () -> f.thenAcceptAsync(null, exec),
+
+            () -> f.thenRun(null),
+            () -> f.thenRunAsync(null),
+            () -> f.thenRunAsync(() -> {} , null),
+            () -> f.thenRunAsync(null, exec),
+
+            () -> f.thenCombine(g, null),
+            () -> f.thenCombineAsync(g, null),
+            () -> f.thenCombineAsync(g, null, exec),
+            () -> f.thenCombine(nullFuture, (x, y) -> x),
+            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
+            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
+            () -> f.thenCombineAsync(g, (x, y) -> x, null),
+
+            () -> f.thenAcceptBoth(g, null),
+            () -> f.thenAcceptBothAsync(g, null),
+            () -> f.thenAcceptBothAsync(g, null, exec),
+            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
+            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
+            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
+            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
+
+            () -> f.runAfterBoth(g, null),
+            () -> f.runAfterBothAsync(g, null),
+            () -> f.runAfterBothAsync(g, null, exec),
+            () -> f.runAfterBoth(nullFuture, () -> {}),
+            () -> f.runAfterBothAsync(nullFuture, () -> {}),
+            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
+            () -> f.runAfterBothAsync(g, () -> {}, null),
+
+            () -> f.applyToEither(g, null),
+            () -> f.applyToEitherAsync(g, null),
+            () -> f.applyToEitherAsync(g, null, exec),
+            () -> f.applyToEither(nullFuture, (x) -> x),
+            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
+            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
+            () -> f.applyToEitherAsync(g, (x) -> x, null),
+
+            () -> f.acceptEither(g, null),
+            () -> f.acceptEitherAsync(g, null),
+            () -> f.acceptEitherAsync(g, null, exec),
+            () -> f.acceptEither(nullFuture, (x) -> {}),
+            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
+            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
+            () -> f.acceptEitherAsync(g, (x) -> {}, null),
+
+            () -> f.runAfterEither(g, null),
+            () -> f.runAfterEitherAsync(g, null),
+            () -> f.runAfterEitherAsync(g, null, exec),
+            () -> f.runAfterEither(nullFuture, () -> {}),
+            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
+            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
+            () -> f.runAfterEitherAsync(g, () -> {}, null),
+
+            () -> f.thenCompose(null),
+            () -> f.thenComposeAsync(null),
+            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
+            () -> f.thenComposeAsync(null, exec),
+
+            () -> f.exceptionally(null),
+
+            () -> f.handle(null),
+
+            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
+            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
+            () -> CompletableFuture.allOf(f, null),
+            () -> CompletableFuture.allOf(null, f),
+
+            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
+            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
+            () -> CompletableFuture.anyOf(f, null),
+            () -> CompletableFuture.anyOf(null, f),
+
+            () -> f.obtrudeException(null),
+        };
+
+        assertThrows(NullPointerException.class, throwingActions);
+        assertEquals(0, exec.count.get());
+    }
+
+    /**
+     * toCompletableFuture returns this CompletableFuture.
+     */
+    public void testToCompletableFuture() {
+        CompletableFuture<Integer> f = new CompletableFuture<>();
+        assertSame(f, f.toCompletableFuture());
+    }
+
+    /**
+     * whenComplete action executes on normal completion, propagating
+     * source result.
+     */
+    public void testWhenComplete_normalCompletion1() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.whenComplete
+            (f,
+             (Integer x, Throwable t) -> {
+                threadAssertSame(x, v1);
+                threadAssertNull(t);
+                a.getAndIncrement();
+            });
+        if (createIncomplete) f.complete(v1);
+
+        checkCompletedNormally(g, v1);
+        checkCompletedNormally(f, v1);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * whenComplete action executes on exceptional completion, propagating
+     * source result.
+     */
+    public void testWhenComplete_exceptionalCompletion() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.completeExceptionally(ex);
+        final CompletableFuture<Integer> g = m.whenComplete
+            (f,
+             (Integer x, Throwable t) -> {
+                threadAssertNull(x);
+                threadAssertSame(t, ex);
+                a.getAndIncrement();
+            });
+        if (createIncomplete) f.completeExceptionally(ex);
+        checkCompletedWithWrappedCFException(f, ex);
+        checkCompletedWithWrappedCFException(g, ex);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * whenComplete action executes on cancelled source, propagating
+     * CancellationException.
+     */
+    public void testWhenComplete_sourceCancelled() {
+        for (ExecutionMode m : ExecutionMode.values())
+        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
+        for (boolean createIncomplete : new boolean[] { true, false })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+        final CompletableFuture<Integer> g = m.whenComplete
+            (f,
+             (Integer x, Throwable t) -> {
+                threadAssertNull(x);
+                threadAssertTrue(t instanceof CancellationException);
+                a.getAndIncrement();
+            });
+        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
+
+        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
+        checkCompletedWithWrappedCancellationException(g);
+        checkCancelled(f);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * If a whenComplete action throws an exception when triggered by
+     * a normal completion, it completes exceptionally
+     */
+    public void testWhenComplete_actionFailed() {
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+        if (!createIncomplete) f.complete(v1);
+        final CompletableFuture<Integer> g = m.whenComplete
+            (f,
+             (Integer x, Throwable t) -> {
+                threadAssertSame(x, v1);
+                threadAssertNull(t);
+                a.getAndIncrement();
+                throw ex;
+            });
+        if (createIncomplete) f.complete(v1);
+        checkCompletedNormally(f, v1);
+        checkCompletedWithWrappedCFException(g, ex);
+        assertEquals(1, a.get());
+    }}
+
+    /**
+     * If a whenComplete action throws an exception when triggered by
+     * a source completion that also throws an exception, the source
+     * exception takes precedence.
+     */
+    public void testWhenComplete_actionFailedSourceFailed() {
+        for (boolean createIncomplete : new boolean[] { true, false })
+        for (ExecutionMode m : ExecutionMode.values())
+        for (Integer v1 : new Integer[] { 1, null })
+    {
+        final AtomicInteger a = new AtomicInteger(0);
+        final CFException ex1 = new CFException();
+        final CFException ex2 = new CFException();
+        final CompletableFuture<Integer> f = new CompletableFuture<>();
+
+        if (!createIncomplete) f.completeExceptionally(ex1);
+        final CompletableFuture<Integer> g = m.whenComplete
+            (f,
+             (Integer x, Throwable t) -> {
+                threadAssertSame(t, ex1);
+                threadAssertNull(x);
+                a.getAndIncrement();
+                throw ex2;
+            });
+        if (createIncomplete) f.completeExceptionally(ex1);
+
+        checkCompletedWithWrappedCFException(f, ex1);
+        checkCompletedWithWrappedCFException(g, ex1);
+        assertEquals(1, a.get());
+    }}
+
 }