Examples with CompletableFuture.completedFuture java.util.concurrent.CompletableFuture.completedFuture used on opensource projects

Example 1 with CompletableFuture.completedFuture

use of java.util.concurrent.CompletableFuture.completedFuture in project assertj-core by joel-costigliola.

the class CompletableFutureAssert_isCompletedWithValueMatching_Test method should_fail_if_result_does_not_match.

@Test
public void should_fail_if_result_does_not_match() {
    // GIVEN
    CompletableFuture<String> future = CompletableFuture.completedFuture("done");
    // WHEN
    Throwable throwable = catchThrowable(() -> assertThat(future).isCompletedWithValueMatching(result -> result.equals("foo"), "is foo"));
    // THEN
    assertThat(throwable).isInstanceOf(AssertionError.class).hasMessageContaining("<\"done\">").hasMessageContaining("to match 'is foo' predicate");
}

Example 2 with CompletableFuture.completedFuture

use of java.util.concurrent.CompletableFuture.completedFuture in project assertj-core by joel-costigliola.

the class CompletableFutureAssert_isCompletedWithValueMatching_Test method should_print_advice_without_description.

@Test
public void should_print_advice_without_description() {
    // GIVEN
    CompletableFuture<String> future = CompletableFuture.completedFuture("done");
    // WHEN
    Throwable throwable = catchThrowable(() -> assertThat(future).isCompletedWithValueMatching(result -> result.equals("foo")));
    // THEN
    assertThat(throwable).isInstanceOf(AssertionError.class).hasMessageContaining("<\"done\">").hasMessageContaining("to match given predicate").hasMessageContaining("a better error message");
}

Example 3 with CompletableFuture.completedFuture

use of java.util.concurrent.CompletableFuture.completedFuture in project pravega by pravega.

the class FuturesTests method testLoopIterable.

@Test
public void testLoopIterable() {
    val list = IntStream.range(1, 10000).boxed().collect(Collectors.toList());
    val processedList = Collections.synchronizedList(new ArrayList<Integer>());
    Futures.loop(list, item -> {
        processedList.add(item);
        return CompletableFuture.completedFuture(true);
    }, ForkJoinPool.commonPool()).join();
    AssertExtensions.assertListEquals("Unexpected result.", list, processedList, Integer::equals);
}

Example 4 with CompletableFuture.completedFuture

use of java.util.concurrent.CompletableFuture.completedFuture in project pravega by pravega.

the class FuturesTests method testDoWhileLoopWithCondition.

@Test
public void testDoWhileLoopWithCondition() {
    final int maxLoops = 10;
    final int expectedResult = maxLoops * (maxLoops - 1) / 2;
    AtomicInteger loopCounter = new AtomicInteger();
    AtomicInteger accumulator = new AtomicInteger();
    // 1. Verify this is actually a do-while loop vs a regular while loop.
    Futures.doWhileLoop(() -> {
        accumulator.incrementAndGet();
        return CompletableFuture.completedFuture(0);
    }, // Only one iteration.
    x -> false, ForkJoinPool.commonPool()).join();
    Assert.assertEquals("Unexpected result for loop without a specific accumulator.", 1, accumulator.get());
    // 2. Successful execution.
    loopCounter.set(0);
    accumulator.set(0);
    Futures.doWhileLoop(() -> {
        int i = loopCounter.get();
        accumulator.addAndGet(i);
        return CompletableFuture.completedFuture(loopCounter.incrementAndGet());
    }, x -> x < maxLoops, ForkJoinPool.commonPool()).join();
    Assert.assertEquals("Unexpected result for loop without a specific accumulator.", expectedResult, accumulator.get());
    // 3. With exceptions.
    loopCounter.set(0);
    accumulator.set(0);
    CompletableFuture<Void> loopFuture = Futures.doWhileLoop(() -> {
        if (loopCounter.incrementAndGet() % 3 == 0) {
            throw new IntentionalException();
        } else {
            accumulator.addAndGet(loopCounter.get());
            return CompletableFuture.completedFuture(loopCounter.get());
        }
    }, x -> x < maxLoops, ForkJoinPool.commonPool());
    AssertExtensions.assertThrows("doWhileLoop() did not return a failed Future when one of the loopBody calls returned a failed Future.", loopFuture::join, ex -> ex instanceof IntentionalException);
    Assert.assertEquals("Unexpected value accumulated until loop was interrupted.", 3, accumulator.get());
}