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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.172 by jsr166, Thu Sep 15 00:32:45 2016 UTC vs.
Revision 1.177 by jsr166, Wed Sep 21 18:25:04 2016 UTC

# Line 3577 | Line 3577 | public class CompletableFutureTest exten
3577       * copy returns a CompletableFuture that is completed normally,
3578       * with the same value, when source is.
3579       */
3580 <    public void testCopy() {
3580 >    public void testCopy_normalCompletion() {
3581 >        for (boolean createIncomplete : new boolean[] { true, false })
3582 >        for (Integer v1 : new Integer[] { 1, null })
3583 >    {
3584          CompletableFuture<Integer> f = new CompletableFuture<>();
3585 +        if (!createIncomplete) assertTrue(f.complete(v1));
3586          CompletableFuture<Integer> g = f.copy();
3587 <        checkIncomplete(f);
3588 <        checkIncomplete(g);
3589 <        f.complete(1);
3590 <        checkCompletedNormally(f, 1);
3591 <        checkCompletedNormally(g, 1);
3592 <    }
3587 >        if (createIncomplete) {
3588 >            checkIncomplete(f);
3589 >            checkIncomplete(g);
3590 >            assertTrue(f.complete(v1));
3591 >        }
3592 >        checkCompletedNormally(f, v1);
3593 >        checkCompletedNormally(g, v1);
3594 >    }}
3595  
3596      /**
3597       * copy returns a CompletableFuture that is completed exceptionally
3598       * when source is.
3599       */
3600 <    public void testCopy2() {
3600 >    public void testCopy_exceptionalCompletion() {
3601 >        for (boolean createIncomplete : new boolean[] { true, false })
3602 >    {
3603 >        CFException ex = new CFException();
3604          CompletableFuture<Integer> f = new CompletableFuture<>();
3605 +        if (!createIncomplete) f.completeExceptionally(ex);
3606          CompletableFuture<Integer> g = f.copy();
3607 <        checkIncomplete(f);
3608 <        checkIncomplete(g);
3609 <        CFException ex = new CFException();
3610 <        f.completeExceptionally(ex);
3607 >        if (createIncomplete) {
3608 >            checkIncomplete(f);
3609 >            checkIncomplete(g);
3610 >            f.completeExceptionally(ex);
3611 >        }
3612          checkCompletedExceptionally(f, ex);
3613          checkCompletedWithWrappedException(g, ex);
3614 +    }}
3615 +
3616 +    /**
3617 +     * Completion of a copy does not complete its source.
3618 +     */
3619 +    public void testCopy_oneWayPropagation() {
3620 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3621 +        assertTrue(f.copy().complete(1));
3622 +        assertTrue(f.copy().complete(null));
3623 +        assertTrue(f.copy().cancel(true));
3624 +        assertTrue(f.copy().cancel(false));
3625 +        assertTrue(f.copy().completeExceptionally(new CFException()));
3626 +        checkIncomplete(f);
3627      }
3628  
3629      /**
# Line 3964 | Line 3988 | public class CompletableFutureTest exten
3988              .collect(Collectors.toList());
3989  
3990          List<CompletionStage<Integer>> stages = new ArrayList<>();
3991 <        stages.add(new CompletableFuture<Integer>().minimalCompletionStage());
3991 >        CompletionStage<Integer> min =
3992 >            new CompletableFuture<Integer>().minimalCompletionStage();
3993 >        stages.add(min);
3994 >        stages.add(min.thenApply(x -> x));
3995          stages.add(CompletableFuture.completedStage(1));
3996          stages.add(CompletableFuture.failedStage(new CFException()));
3997  
# Line 4000 | Line 4027 | public class CompletableFutureTest exten
4027              throw new Error("Methods did not throw UOE: " + bugs);
4028      }
4029  
4030 +    /**
4031 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4032 +     * is completed normally, with the same value, when source is.
4033 +     */
4034 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4035 +        for (boolean createIncomplete : new boolean[] { true, false })
4036 +        for (Integer v1 : new Integer[] { 1, null })
4037 +    {
4038 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4039 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4040 +        if (!createIncomplete) assertTrue(f.complete(v1));
4041 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4042 +        if (createIncomplete) {
4043 +            checkIncomplete(f);
4044 +            checkIncomplete(g);
4045 +            assertTrue(f.complete(v1));
4046 +        }
4047 +        checkCompletedNormally(f, v1);
4048 +        checkCompletedNormally(g, v1);
4049 +    }}
4050 +
4051 +    /**
4052 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4053 +     * is completed exceptionally when source is.
4054 +     */
4055 +    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4056 +        for (boolean createIncomplete : new boolean[] { true, false })
4057 +    {
4058 +        CFException ex = new CFException();
4059 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4060 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4061 +        if (!createIncomplete) f.completeExceptionally(ex);
4062 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4063 +        if (createIncomplete) {
4064 +            checkIncomplete(f);
4065 +            checkIncomplete(g);
4066 +            f.completeExceptionally(ex);
4067 +        }
4068 +        checkCompletedExceptionally(f, ex);
4069 +        checkCompletedWithWrappedException(g, ex);
4070 +    }}
4071 +
4072 +    /**
4073 +     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4074 +     */
4075 +    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4076 +        for (Integer v1 : new Integer[] { 1, null })
4077 +    {
4078 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4079 +        CompletionStage minimal = f.minimalCompletionStage();
4080 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4081 +        g.complete(v1);
4082 +        checkCompletedNormally(g, v1);
4083 +        checkIncomplete(f);
4084 +        checkIncomplete(minimal.toCompletableFuture());
4085 +    }}
4086 +
4087 +    /**
4088 +     * minimalStage.toCompletableFuture().join() awaits completion
4089 +     */
4090 +    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4091 +        for (boolean createIncomplete : new boolean[] { true, false })
4092 +        for (Integer v1 : new Integer[] { 1, null })
4093 +    {
4094 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4095 +        if (!createIncomplete) assertTrue(f.complete(v1));
4096 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4097 +        if (createIncomplete) assertTrue(f.complete(v1));
4098 +        assertEquals(v1, minimal.toCompletableFuture().join());
4099 +        assertEquals(v1, minimal.toCompletableFuture().get());
4100 +        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4101 +    }}
4102 +
4103 +    /**
4104 +     * Completion of a toCompletableFuture copy of a minimal stage
4105 +     * does not complete its source.
4106 +     */
4107 +    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4108 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4109 +        CompletionStage<Integer> g = f.minimalCompletionStage();
4110 +        assertTrue(g.toCompletableFuture().complete(1));
4111 +        assertTrue(g.toCompletableFuture().complete(null));
4112 +        assertTrue(g.toCompletableFuture().cancel(true));
4113 +        assertTrue(g.toCompletableFuture().cancel(false));
4114 +        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4115 +        checkIncomplete(g.toCompletableFuture());
4116 +        f.complete(1);
4117 +        checkCompletedNormally(g.toCompletableFuture(), 1);
4118 +    }
4119 +
4120 +    /** Demo utility method for external reliable toCompletableFuture */
4121 +    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4122 +        CompletableFuture<T> f = new CompletableFuture<>();
4123 +        stage.handle((T t, Throwable ex) -> {
4124 +                         if (ex != null) f.completeExceptionally(ex);
4125 +                         else f.complete(t);
4126 +                         return null;
4127 +                     });
4128 +        return f;
4129 +    }
4130 +
4131 +    /** Demo utility method to join a CompletionStage */
4132 +    static <T> T join(CompletionStage<T> stage) {
4133 +        return toCompletableFuture(stage).join();
4134 +    }
4135 +
4136 +    /**
4137 +     * Joining a minimal stage "by hand" works
4138 +     */
4139 +    public void testMinimalCompletionStage_join_by_hand() {
4140 +        for (boolean createIncomplete : new boolean[] { true, false })
4141 +        for (Integer v1 : new Integer[] { 1, null })
4142 +    {
4143 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4144 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4145 +        CompletableFuture<Integer> g = new CompletableFuture<>();
4146 +        if (!createIncomplete) assertTrue(f.complete(v1));
4147 +        minimal.thenAccept((x) -> g.complete(x));
4148 +        if (createIncomplete) assertTrue(f.complete(v1));
4149 +        g.join();
4150 +        checkCompletedNormally(g, v1);
4151 +        checkCompletedNormally(f, v1);
4152 +        assertEquals(v1, join(minimal));
4153 +    }}
4154 +
4155      static class Monad {
4156          static class ZeroException extends RuntimeException {
4157              public ZeroException() { super("monadic zero"); }

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