| /* |
| * Copyright (C) 2016 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.base.Verify.verify; |
| import static com.google.common.truth.Truth.assertThat; |
| import static com.google.common.util.concurrent.Futures.immediateFailedFuture; |
| import static com.google.common.util.concurrent.Futures.immediateFuture; |
| import static com.google.common.util.concurrent.MoreExecutors.directExecutor; |
| import static java.util.concurrent.Executors.newScheduledThreadPool; |
| import static java.util.concurrent.TimeUnit.SECONDS; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import com.google.common.base.Function; |
| import com.google.common.util.concurrent.ForwardingListenableFuture.SimpleForwardingListenableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeoutException; |
| import junit.framework.TestCase; |
| |
| /** |
| * Tests for {@link FluentFuture}. The tests cover only the basics for the API. The actual logic is |
| * tested in {@link FuturesTest}. |
| */ |
| @GwtCompatible(emulated = true) |
| public class FluentFutureTest extends TestCase { |
| public void testFromFluentFuture() { |
| FluentFuture<String> f = FluentFuture.from(SettableFuture.<String>create()); |
| assertThat(FluentFuture.from(f)).isSameAs(f); |
| } |
| |
| public void testFromNonFluentFuture() throws Exception { |
| ListenableFuture<String> f = |
| new SimpleForwardingListenableFuture<String>(immediateFuture("a")) {}; |
| verify(!(f instanceof FluentFuture)); |
| assertThat(FluentFuture.from(f).get()).isEqualTo("a"); |
| // TODO(cpovirk): Test forwarding more extensively. |
| } |
| |
| public void testAddCallback() { |
| FluentFuture<String> f = FluentFuture.from(immediateFuture("a")); |
| final boolean[] called = new boolean[1]; |
| f.addCallback( |
| new FutureCallback<String>() { |
| @Override |
| public void onSuccess(String result) { |
| called[0] = true; |
| } |
| |
| @Override |
| public void onFailure(Throwable t) {} |
| }, |
| directExecutor()); |
| assertThat(called[0]).isTrue(); |
| } |
| |
| public void testCatching() throws Exception { |
| FluentFuture<?> f = |
| FluentFuture.from(immediateFailedFuture(new RuntimeException())) |
| .catching( |
| Throwable.class, |
| new Function<Throwable, Class<?>>() { |
| @Override |
| public Class<?> apply(Throwable input) { |
| return input.getClass(); |
| } |
| }, |
| directExecutor()); |
| assertThat(f.get()).isEqualTo(RuntimeException.class); |
| } |
| |
| public void testCatchingAsync() throws Exception { |
| FluentFuture<?> f = |
| FluentFuture.from(immediateFailedFuture(new RuntimeException())) |
| .catchingAsync( |
| Throwable.class, |
| new AsyncFunction<Throwable, Class<?>>() { |
| @Override |
| public ListenableFuture<Class<?>> apply(Throwable input) { |
| return Futures.<Class<?>>immediateFuture(input.getClass()); |
| } |
| }, |
| directExecutor()); |
| assertThat(f.get()).isEqualTo(RuntimeException.class); |
| } |
| |
| public void testTransform() throws Exception { |
| FluentFuture<Integer> f = |
| FluentFuture.from(immediateFuture(1)) |
| .transform( |
| new Function<Integer, Integer>() { |
| @Override |
| public Integer apply(Integer input) { |
| return input + 1; |
| } |
| }, |
| directExecutor()); |
| assertThat(f.get()).isEqualTo(2); |
| } |
| |
| public void testTransformAsync() throws Exception { |
| FluentFuture<Integer> f = |
| FluentFuture.from(immediateFuture(1)) |
| .transformAsync( |
| new AsyncFunction<Integer, Integer>() { |
| @Override |
| public ListenableFuture<Integer> apply(Integer input) { |
| return immediateFuture(input + 1); |
| } |
| }, |
| directExecutor()); |
| assertThat(f.get()).isEqualTo(2); |
| } |
| |
| @GwtIncompatible // withTimeout |
| public void testWithTimeout() throws Exception { |
| ScheduledExecutorService executor = newScheduledThreadPool(1); |
| try { |
| FluentFuture<?> f = |
| FluentFuture.from(SettableFuture.create()).withTimeout(0, SECONDS, executor); |
| try { |
| f.get(); |
| fail(); |
| } catch (ExecutionException e) { |
| assertThat(e).hasCauseThat().isInstanceOf(TimeoutException.class); |
| } |
| } finally { |
| executor.shutdown(); |
| } |
| } |
| } |