/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
*/
/*
* @test
* @bug 8005696
* @summary Basic tests for CompletableFuture
* @author Chris Hegarty
*/
import java.lang.reflect.Array;
import java.util.concurrent.Phaser;
import static java.util.concurrent.TimeUnit.*;
import java.util.concurrent.CompletableFuture;
import static java.util.concurrent.CompletableFuture.*;
import java.util.concurrent.CompletionException;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import static java.util.concurrent.ForkJoinPool.*;
import java.util.concurrent.atomic.AtomicInteger;
public class Basic {
static void checkCompletedNormally(CompletableFuture<?> cf, Object value) {
checkCompletedNormally(cf, value == null ? null : new Object[] { value });
}
static void checkCompletedNormally(CompletableFuture<?> cf, Object[] values) {
try { equalAnyOf(cf.join(), values); } catch (Throwable x) { unexpected(x); }
try { equalAnyOf(cf.getNow(null), values); } catch (Throwable x) { unexpected(x); }
try { equalAnyOf(cf.get(), values); } catch (Throwable x) { unexpected(x); }
try { equalAnyOf(cf.get(0L, SECONDS), values); } catch (Throwable x) { unexpected(x); }
check(cf.isDone(), "Expected isDone to be true, got:" + cf);
check(!cf.isCancelled(), "Expected isCancelled to be false");
check(!cf.cancel(true), "Expected cancel to return false");
check(cf.toString().contains("[Completed normally]"));
check(cf.complete(null) == false, "Expected complete() to fail");
check(cf.completeExceptionally(new Throwable()) == false,
"Expected completeExceptionally() to fail");
}
static <T> void checkCompletedExceptionally(CompletableFuture<T> cf)
throws Exception
{
checkCompletedExceptionally(cf, false);
}
@SuppressWarnings("unchecked")
static <T> void checkCompletedExceptionally(CompletableFuture<T> cf, boolean cancelled)
throws Exception
{
try { cf.join(); fail("Excepted exception to be thrown"); }
catch (CompletionException x) { if (cancelled) fail(); else pass(); }
catch (CancellationException x) { if (cancelled) pass(); else fail(); }
try { cf.getNow(null); fail("Excepted exception to be thrown"); }
catch (CompletionException x) { if (cancelled) fail(); else pass(); }
catch (CancellationException x) { if (cancelled) pass(); else fail(); }
try { cf.get(); fail("Excepted exception to be thrown");}
catch (CancellationException x) { if (cancelled) pass(); else fail(); }
catch (ExecutionException x) { if (cancelled) check(x.getCause() instanceof CancellationException); else pass(); }
try { cf.get(0L, SECONDS); fail("Excepted exception to be thrown");}
catch (CancellationException x) { if (cancelled) pass(); else fail(); }
catch (ExecutionException x) { if (cancelled) check(x.getCause() instanceof CancellationException); else pass(); }
check(cf.isDone(), "Expected isDone to be true, got:" + cf);
check(cf.isCancelled() == cancelled, "Expected isCancelled: " + cancelled + ", got:" + cf.isCancelled());
check(cf.cancel(true) == cancelled, "Expected cancel: " + cancelled + ", got:" + cf.cancel(true));
check(cf.toString().contains("[Completed exceptionally]")); // ## TODO: 'E'xceptionally
check(cf.complete((T)new Object()) == false, "Expected complete() to fail");
check(cf.completeExceptionally(new Throwable()) == false,
"Expected completeExceptionally() to fail, already completed");
}
private static void realMain(String[] args) throws Throwable {
ExecutorService executor = Executors.newFixedThreadPool(2);
try {
test(executor);
} finally {
executor.shutdown();
executor.awaitTermination(30, SECONDS);
}
}
static AtomicInteger atomicInt = new AtomicInteger(0);
private static void test(ExecutorService executor) throws Throwable {
Thread.currentThread().setName("mainThread");
//----------------------------------------------------------------
// supplyAsync tests
//----------------------------------------------------------------
try {
CompletableFuture<String> cf = supplyAsync(() -> "a test string");
checkCompletedNormally(cf, cf.join());
cf = supplyAsync(() -> "a test string", commonPool());
checkCompletedNormally(cf, cf.join());
cf = supplyAsync(() -> "a test string", executor);
checkCompletedNormally(cf, cf.join());
cf = supplyAsync(() -> { throw new RuntimeException(); });
checkCompletedExceptionally(cf);
cf = supplyAsync(() -> { throw new RuntimeException(); }, commonPool());
checkCompletedExceptionally(cf);
cf = supplyAsync(() -> { throw new RuntimeException(); }, executor);
checkCompletedExceptionally(cf);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// runAsync tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf = runAsync(() -> { });
checkCompletedNormally(cf, cf.join());
cf = runAsync(() -> { }, commonPool());
checkCompletedNormally(cf, cf.join());
cf = runAsync(() -> { }, executor);
checkCompletedNormally(cf, cf.join());
cf = runAsync(() -> { throw new RuntimeException(); });
checkCompletedExceptionally(cf);
cf = runAsync(() -> { throw new RuntimeException(); }, commonPool());
checkCompletedExceptionally(cf);
cf = runAsync(() -> { throw new RuntimeException(); }, executor);
checkCompletedExceptionally(cf);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// explicit completion
//----------------------------------------------------------------
try {
final Phaser phaser = new Phaser(1);
final int phase = phaser.getPhase();
CompletableFuture<Integer> cf;
cf = supplyAsync(() -> { phaser.awaitAdvance(phase); return 1; });
cf.complete(2);
phaser.arrive();
checkCompletedNormally(cf, 2);
cf = supplyAsync(() -> { phaser.awaitAdvance(phase+1); return 1; });
cf.completeExceptionally(new Throwable());
phaser.arrive();
checkCompletedExceptionally(cf);
cf = supplyAsync(() -> { phaser.awaitAdvance(phase+2); return 1; });
cf.cancel(true);
phaser.arrive();
checkCompletedExceptionally(cf, true);
cf = supplyAsync(() -> { phaser.awaitAdvance(phase+3); return 1; });
check(cf.getNow(2) == 2);
phaser.arrive();
checkCompletedNormally(cf, 1);
check(cf.getNow(2) == 1);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenApplyXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenApply((x) -> { if (x.equals("a test string")) return 1; else return 0; });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenApplyAsync((x) -> { if (x.equals("a test string")) return 1; else return 0; });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenApplyAsync((x) -> { if (x.equals("a test string")) return 1; else return 0; }, executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenApply((x) -> { return 0; } );
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenApplyAsync((x) -> { return 0; } );
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenApplyAsync((x) -> { return 0; }, executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenAcceptXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf2;
int before = atomicInt.get();
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenAccept((x) -> { if (x.equals("a test string")) { atomicInt.incrementAndGet(); return; } throw new RuntimeException(); });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenAcceptAsync((x) -> { if (x.equals("a test string")) { atomicInt.incrementAndGet(); return; } throw new RuntimeException(); });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenAcceptAsync((x) -> { if (x.equals("a test string")) { atomicInt.incrementAndGet(); return; } throw new RuntimeException(); }, executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenAccept((x) -> { atomicInt.incrementAndGet(); } );
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenAcceptAsync((x) -> { atomicInt.incrementAndGet(); } );
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenAcceptAsync((x) -> { atomicInt.incrementAndGet(); }, executor );
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenRunXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf2;
int before = atomicInt.get();
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenRun(() -> { atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenRunAsync(() -> { atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 = cf1.thenRunAsync(() -> { atomicInt.incrementAndGet(); }, executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenRun(() -> { atomicInt.incrementAndGet(); });
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenRunAsync(() -> { atomicInt.incrementAndGet(); });
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenRunAsync(() -> { atomicInt.incrementAndGet(); }, executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenCombineXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf3;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenCombine(cf2, (x, y) -> { return x + y; });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenCombineAsync(cf2, (x, y) -> { return x + y; });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenCombineAsync(cf2, (x, y) -> { return x + y; }, executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenCombine(cf2, (x, y) -> { return 0; });
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 1);
checkCompletedExceptionally(cf3);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.thenCombineAsync(cf2, (x, y) -> { return 0; });
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.thenCombineAsync(cf2, (x, y) -> { return 0; }, executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenAcceptBothXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenAcceptBoth(cf2, (x, y) -> { check(x + y == 2); atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenAcceptBothAsync(cf2, (x, y) -> { check(x + y == 2); atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenAcceptBothAsync(cf2, (x, y) -> { check(x + y == 2); atomicInt.incrementAndGet(); }, executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> 1);
cf3 = cf1.thenAcceptBoth(cf2, (x, y) -> { atomicInt.incrementAndGet(); });
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 1);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.thenAcceptBothAsync(cf2, (x, y) -> { atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.thenAcceptBothAsync(cf2, (x, y) -> { atomicInt.incrementAndGet(); }, executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// runAfterBothXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 = cf1.runAfterBoth(cf2, () -> { check(cf1.isDone()); check(cf2.isDone()); atomicInt.incrementAndGet(); });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cfa = supplyAsync(() -> 1);
CompletableFuture<Integer> cfb = supplyAsync(() -> 1);
cf3 = cfa.runAfterBothAsync(cfb, () -> { check(cfa.isDone()); check(cfb.isDone()); atomicInt.incrementAndGet(); });
checkCompletedNormally(cfa, 1);
checkCompletedNormally(cfb, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cfx = supplyAsync(() -> 1);
CompletableFuture<Integer> cfy = supplyAsync(() -> 1);
cf3 = cfy.runAfterBothAsync(cfx, () -> { check(cfx.isDone()); check(cfy.isDone()); atomicInt.incrementAndGet(); }, executor);
checkCompletedNormally(cfx, 1);
checkCompletedNormally(cfy, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cf4 = supplyAsync(() -> { throw new RuntimeException(); });
CompletableFuture<Integer> cf5 = supplyAsync(() -> 1);
cf3 = cf5.runAfterBothAsync(cf4, () -> { atomicInt.incrementAndGet(); }, executor);
checkCompletedExceptionally(cf4);
checkCompletedNormally(cf5, 1);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
before = atomicInt.get();
cf4 = supplyAsync(() -> 1);
cf5 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf5.runAfterBothAsync(cf4, () -> { atomicInt.incrementAndGet(); });
checkCompletedNormally(cf4, 1);
checkCompletedExceptionally(cf5);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
before = atomicInt.get();
cf4 = supplyAsync(() -> { throw new RuntimeException(); });
cf5 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf5.runAfterBoth(cf4, () -> { atomicInt.incrementAndGet(); });
checkCompletedExceptionally(cf4);
checkCompletedExceptionally(cf5);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// applyToEitherXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf3;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
cf3 = cf1.applyToEither(cf2, (x) -> { check(x == 1 || x == 2); return x; });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, new Object[] {1, 2});
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 = cf1.applyToEitherAsync(cf2, (x) -> { check(x == 1 || x == 2); return x; });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, new Object[] {1, 2});
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 = cf1.applyToEitherAsync(cf2, (x) -> { check(x == 1 || x == 2); return x; }, executor);
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, new Object[] {1, 2});
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> 2);
cf3 = cf1.applyToEither(cf2, (x) -> { check(x == 2); return x; });
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == 1); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.applyToEitherAsync(cf2, (x) -> { check(x == 1); return x; });
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == 1); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.applyToEitherAsync(cf2, (x) -> { fail(); return x; });
check(cf1.isDone() || cf2.isDone());
checkCompletedExceptionally(cf3);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// acceptEitherXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
cf3 = cf1.acceptEither(cf2, (x) -> { check(x == 1 || x == 2); atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 = cf1.acceptEitherAsync(cf2, (x) -> { check(x == 1 || x == 2); atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 = cf2.acceptEitherAsync(cf1, (x) -> { check(x == 1 || x == 2); atomicInt.incrementAndGet(); }, executor);
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> 2);
cf3 = cf2.acceptEitherAsync(cf1, (x) -> { check(x == 2); }, executor);
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == null); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf2.acceptEitherAsync(cf1, (x) -> { check(x == 1); });
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == null); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = supplyAsync(() -> { throw new RuntimeException(); });
cf3 = cf2.acceptEitherAsync(cf1, (x) -> { fail(); });
check(cf1.isDone() || cf2.isDone());
checkCompletedExceptionally(cf3);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// runAfterEitherXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Void> cf1 = runAsync(() -> { });
CompletableFuture<Void> cf2 = runAsync(() -> { });
cf3 = cf1.runAfterEither(cf2, () -> { atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> { });
cf2 = runAsync(() -> { });
cf3 = cf1.runAfterEitherAsync(cf2, () -> { atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> { });
cf2 = runAsync(() -> { });
cf3 = cf2.runAfterEitherAsync(cf1, () -> { atomicInt.incrementAndGet(); }, executor);
check(cf1.isDone() || cf2.isDone());
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> { throw new RuntimeException(); });
cf2 = runAsync(() -> { });
cf3 = cf2.runAfterEither(cf1, () -> { atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == null); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> { });
cf2 = runAsync(() -> { throw new RuntimeException(); });
cf3 = cf1.runAfterEitherAsync(cf2, () -> { atomicInt.incrementAndGet(); });
check(cf1.isDone() || cf2.isDone());
try { check(cf3.join() == null); } catch (CompletionException x) { pass(); }
check(cf3.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> { throw new RuntimeException(); });
cf2 = runAsync(() -> { throw new RuntimeException(); });
cf3 = cf2.runAfterEitherAsync(cf1, () -> { atomicInt.incrementAndGet(); }, executor);
check(cf1.isDone() || cf2.isDone());
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// thenComposeXXX tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 = cf1.thenCompose((x) -> { check(x ==1); return CompletableFuture.completedFuture(2); });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
cf1 = supplyAsync(() -> 1);
cf2 = cf1.thenComposeAsync((x) -> { check(x ==1); return CompletableFuture.completedFuture(2); });
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
cf1 = supplyAsync(() -> 1);
cf2 = cf1.thenComposeAsync((x) -> { check(x ==1); return CompletableFuture.completedFuture(2); }, executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
int before = atomicInt.get();
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenCompose((x) -> { atomicInt.incrementAndGet(); return CompletableFuture.completedFuture(2); });
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> { throw new RuntimeException(); });
cf2 = cf1.thenComposeAsync((x) -> { atomicInt.incrementAndGet(); return CompletableFuture.completedFuture(2); });
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> 1);
cf2 = cf1.thenComposeAsync((x) -> { throw new RuntimeException(); }, executor);
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// anyOf tests
//----------------------------------------------------------------
//try {
// CompletableFuture<Object> cf3;
// for (int k=0; k < 10; k++){
// CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
// CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
// cf3 = CompletableFuture.anyOf(cf1, cf2);
// check(cf1.isDone() || cf2.isDone());
// checkCompletedNormally(cf3, new Object[] {1, 2});
// }
//} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// allOf tests
//----------------------------------------------------------------
try {
CompletableFuture<?> cf3;
for (int k=0; k < 10; k++){
CompletableFuture<Integer>[] cfs = (CompletableFuture<Integer>[])
Array.newInstance(CompletableFuture.class, 10);
for (int j=0; j < 10; j++) {
final int v = j;
cfs[j] = supplyAsync(() -> v);
}
cf3 = CompletableFuture.allOf(cfs);
for (int j=0; j < 10; j++)
checkCompletedNormally(cfs[j], j);
checkCompletedNormally(cf3, null);
}
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// exceptionally tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 = cf1.exceptionally((t) -> { fail("function should never be called"); return 2;});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
final RuntimeException t = new RuntimeException();
cf1 = supplyAsync(() -> { throw t; });
cf2 = cf1.exceptionally((x) -> { check(x.getCause() == t); return 2;});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 2);
} catch (Throwable t) { unexpected(t); }
//----------------------------------------------------------------
// handle tests
//----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 = cf1.handle((x,t) -> x+1);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
final RuntimeException ex = new RuntimeException();
cf1 = supplyAsync(() -> { throw ex; });
cf2 = cf1.handle((x,t) -> { check(t.getCause() == ex); return 2;});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 2);
} catch (Throwable t) { unexpected(t); }
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static void pass() {passed++;}
static void fail() {failed++; Thread.dumpStack();}
static void fail(String msg) {System.out.println(msg); fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void check(boolean cond) {if (cond) pass(); else fail();}
static void check(boolean cond, String msg) {if (cond) pass(); else fail(msg);}
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
static void equalAnyOf(Object x, Object[] y) {
if (x == null && y == null) { pass(); return; }
for (Object z : y) { if (x.equals(z)) { pass(); return; } }
StringBuilder sb = new StringBuilder();
for (Object o : y)
sb.append(o).append(" ");
fail(x + " not equal to one of [" + sb + "]");}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}