1/*
2 * Copyright (C) 2013 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package com.google.common.util.concurrent;
18
19import junit.framework.TestCase;
20
21import java.util.Collection;
22import java.util.List;
23import java.util.concurrent.Callable;
24import java.util.concurrent.ExecutionException;
25import java.util.concurrent.Executors;
26import java.util.concurrent.Future;
27import java.util.concurrent.ScheduledExecutorService;
28import java.util.concurrent.ScheduledFuture;
29import java.util.concurrent.TimeUnit;
30import java.util.concurrent.TimeoutException;
31
32/**
33 * Test for {@link WrappingScheduledExecutorService}
34 *
35 * @author Luke Sandberg
36 */
37public class WrappingScheduledExecutorServiceTest extends TestCase {
38  private static final Runnable DO_NOTHING = new Runnable() {
39    @Override
40    public void run() {
41    }
42  };
43
44  public void testSchedule() {
45    MockExecutor mock = new MockExecutor();
46    TestExecutor testExecutor = new TestExecutor(mock);
47
48    testExecutor.schedule(DO_NOTHING, 10, TimeUnit.MINUTES);
49    mock.assertLastMethodCalled("scheduleRunnable", 10, TimeUnit.MINUTES);
50
51    testExecutor.schedule(Executors.callable(DO_NOTHING), 5, TimeUnit.SECONDS);
52    mock.assertLastMethodCalled("scheduleCallable", 5, TimeUnit.SECONDS);
53  }
54
55  public void testSchedule_repeating() {
56    MockExecutor mock = new MockExecutor();
57    TestExecutor testExecutor = new TestExecutor(mock);
58    testExecutor.scheduleWithFixedDelay(DO_NOTHING, 100, 10, TimeUnit.MINUTES);
59    mock.assertLastMethodCalled("scheduleWithFixedDelay", 100, 10, TimeUnit.MINUTES);
60
61    testExecutor.scheduleAtFixedRate(DO_NOTHING, 3, 7, TimeUnit.SECONDS);
62    mock.assertLastMethodCalled("scheduleAtFixedRate", 3, 7, TimeUnit.SECONDS);
63  }
64
65  private static final class WrappedCallable<T> implements Callable<T> {
66    private final Callable<T> delegate;
67
68    public WrappedCallable(Callable<T> delegate) {
69      this.delegate = delegate;
70    }
71
72    @Override
73    public T call() throws Exception {
74      return delegate.call();
75    }
76  }
77
78  private static final class WrappedRunnable implements Runnable {
79    private final Runnable delegate;
80
81    public WrappedRunnable(Runnable delegate) {
82      this.delegate = delegate;
83    }
84
85    @Override
86    public void run() {
87      delegate.run();
88    }
89  }
90
91  private static final class TestExecutor extends WrappingScheduledExecutorService {
92    public TestExecutor(MockExecutor mock) {
93      super(mock);
94    }
95
96    @Override
97    protected <T> Callable<T> wrapTask(Callable<T> callable) {
98      return new WrappedCallable<T>(callable);
99    }
100
101    @Override protected Runnable wrapTask(Runnable command) {
102      return new WrappedRunnable(command);
103    }
104  }
105
106  private static final class MockExecutor implements ScheduledExecutorService {
107    String lastMethodCalled = "";
108    long lastInitialDelay;
109    long lastDelay;
110    TimeUnit lastUnit;
111
112    void assertLastMethodCalled(String method, long delay, TimeUnit unit) {
113      assertEquals(method, lastMethodCalled);
114      assertEquals(delay, lastDelay);
115      assertEquals(unit, lastUnit);
116    }
117
118    void assertLastMethodCalled(String method, long initialDelay, long delay, TimeUnit unit) {
119      assertEquals(method, lastMethodCalled);
120      assertEquals(initialDelay, lastInitialDelay);
121      assertEquals(delay, lastDelay);
122      assertEquals(unit, lastUnit);
123    }
124
125    @Override public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
126      assertTrue(command instanceof WrappedRunnable);
127      lastMethodCalled = "scheduleRunnable";
128      lastDelay = delay;
129      lastUnit = unit;
130      return null;
131    }
132
133    @Override public <V> ScheduledFuture<V> schedule(
134        Callable<V> callable, long delay, TimeUnit unit) {
135      assertTrue(callable instanceof WrappedCallable);
136      lastMethodCalled = "scheduleCallable";
137      lastDelay = delay;
138      lastUnit = unit;
139      return null;
140    }
141
142    @Override public ScheduledFuture<?> scheduleAtFixedRate(
143        Runnable command, long initialDelay, long period, TimeUnit unit) {
144      assertTrue(command instanceof WrappedRunnable);
145      lastMethodCalled = "scheduleAtFixedRate";
146      lastInitialDelay = initialDelay;
147      lastDelay = period;
148      lastUnit = unit;
149      return null;
150    }
151
152    @Override public ScheduledFuture<?> scheduleWithFixedDelay(
153        Runnable command, long initialDelay, long delay, TimeUnit unit) {
154      assertTrue(command instanceof WrappedRunnable);
155      lastMethodCalled = "scheduleWithFixedDelay";
156      lastInitialDelay = initialDelay;
157      lastDelay = delay;
158      lastUnit = unit;
159      return null;
160    }
161
162    // No need to test these methods as they are handled by WrappingExecutorServiceTest
163    @Override
164    public boolean awaitTermination(long timeout, TimeUnit unit) {
165      throw new UnsupportedOperationException();
166    }
167
168    @Override
169    public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)
170        throws InterruptedException {
171      throw new UnsupportedOperationException();
172    }
173
174    @Override
175    public <T> List<Future<T>> invokeAll(
176        Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
177        throws InterruptedException {
178      throw new UnsupportedOperationException();
179    }
180
181    @Override
182    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
183        throws ExecutionException, InterruptedException {
184      throw new UnsupportedOperationException();
185    }
186
187    @Override
188    public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
189        throws ExecutionException, InterruptedException, TimeoutException {
190      throw new UnsupportedOperationException();
191    }
192
193    @Override
194    public boolean isShutdown() {
195      throw new UnsupportedOperationException();
196    }
197
198    @Override
199    public boolean isTerminated() {
200      throw new UnsupportedOperationException();
201    }
202
203    @Override
204    public void shutdown() {
205      throw new UnsupportedOperationException();
206    }
207
208    @Override
209    public List<Runnable> shutdownNow() {
210      throw new UnsupportedOperationException();
211    }
212
213    @Override
214    public <T> Future<T> submit(Callable<T> task) {
215      throw new UnsupportedOperationException();
216    }
217
218    @Override
219    public Future<?> submit(Runnable task) {
220      throw new UnsupportedOperationException();
221    }
222
223    @Override
224    public <T> Future<T> submit(Runnable task, T result) {
225      throw new UnsupportedOperationException();
226    }
227
228    @Override
229    public void execute(Runnable command) {
230      throw new UnsupportedOperationException();
231    }
232
233  }
234}
235