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/*
* Copyright (C) 2017 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.util.concurrent;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly;
import com.google.common.util.concurrent.ClosingFuture.ClosingCallable;
import com.google.common.util.concurrent.ClosingFuture.DeferredCloser;
import java.io.Closeable;
import java.util.concurrent.ExecutionException;
/** Tests for {@link ClosingFuture} that exercise {@link ClosingFuture#finishToFuture()}. */
public class ClosingFutureFinishToFutureTest extends AbstractClosingFutureTest {
public void testFinishToFuture_throwsIfCalledTwice() throws Exception {
ClosingFuture<Closeable> closingFuture =
ClosingFuture.submit(
new ClosingCallable<Closeable>() {
@Override
public Closeable call(DeferredCloser closer) throws Exception {
return closer.eventuallyClose(mockCloseable, executor);
}
},
executor);
FluentFuture<Closeable> unused = closingFuture.finishToFuture();
try {
FluentFuture<Closeable> unused2 = closingFuture.finishToFuture();
fail("should have thrown");
} catch (IllegalStateException expected) {
}
}
public void testFinishToFuture_throwsAfterCallingFinishToValueAndCloser() throws Exception {
ClosingFuture<Closeable> closingFuture =
ClosingFuture.submit(
new ClosingCallable<Closeable>() {
@Override
public Closeable call(DeferredCloser closer) throws Exception {
return closer.eventuallyClose(mockCloseable, executor);
}
},
executor);
closingFuture.finishToValueAndCloser(new NoOpValueAndCloserConsumer<>(), directExecutor());
try {
FluentFuture<Closeable> unused = closingFuture.finishToFuture();
fail("should have thrown");
} catch (IllegalStateException expected) {
}
}
public void testFinishToFuture_preventsFurtherDerivation() {
ClosingFuture<String> closingFuture = ClosingFuture.from(immediateFuture("value1"));
FluentFuture<String> unused = closingFuture.finishToFuture();
assertDerivingThrowsIllegalStateException(closingFuture);
}
@Override
<T> T getFinalValue(ClosingFuture<T> closingFuture) throws ExecutionException {
return getUninterruptibly(closingFuture.finishToFuture());
}
@Override
void assertFinallyFailsWithException(ClosingFuture<?> closingFuture) {
assertThatFutureFailsWithException(closingFuture.finishToFuture());
}
@Override
void assertBecomesCanceled(ClosingFuture<?> closingFuture) throws ExecutionException {
assertThatFutureBecomesCancelled(closingFuture.finishToFuture());
}
@Override
void cancelFinalStepAndWait(ClosingFuture<TestCloseable> closingFuture) {
assertThat(closingFuture.finishToFuture().cancel(false)).isTrue();
waitUntilClosed(closingFuture);
futureCancelled.countDown();
}
}
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