blob: d0d8e89c847572a05d9e070957d85511a1e256c6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Copyright (C) 2008 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 org.junit.Assert.assertThrows;
import com.google.common.util.concurrent.testing.MockFutureListener;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import junit.framework.TestCase;
/**
* Unit tests for any listenable future that chains other listenable futures. Unit tests need only
* override buildChainingFuture and getSuccessfulResult, but they can add custom tests as needed.
*
* @author Nishant Thakkar
*/
public abstract class AbstractChainedListenableFutureTest<T> extends TestCase {
protected static final int EXCEPTION_DATA = -1;
protected static final int VALID_INPUT_DATA = 1;
protected static final Exception EXCEPTION = new Exception("Test exception");
protected SettableFuture<Integer> inputFuture;
protected ListenableFuture<T> resultFuture;
protected MockFutureListener listener;
@Override
protected void setUp() throws Exception {
super.setUp();
inputFuture = SettableFuture.create();
resultFuture = buildChainingFuture(inputFuture);
listener = new MockFutureListener(resultFuture);
}
public void testFutureGetBeforeCallback() throws Exception {
// Verify that get throws a timeout exception before the callback is called.
assertThrows(TimeoutException.class, () -> resultFuture.get(1L, TimeUnit.MILLISECONDS));
}
public void testFutureGetThrowsWrappedException() throws Exception {
inputFuture.setException(EXCEPTION);
listener.assertException(EXCEPTION);
}
public void testFutureGetThrowsWrappedError() throws Exception {
Error error = new Error();
inputFuture.setException(error);
// Verify that get throws an ExecutionException, caused by an Error, when
// the callback is called.
listener.assertException(error);
}
public void testAddListenerAfterCallback() throws Throwable {
inputFuture.set(VALID_INPUT_DATA);
listener.assertSuccess(getSuccessfulResult());
}
public void testFutureBeforeCallback() throws Throwable {
inputFuture.set(VALID_INPUT_DATA);
listener.assertSuccess(getSuccessfulResult());
}
public void testInputFutureToString() throws Throwable {
assertThat(resultFuture.toString()).contains(inputFuture.toString());
}
/**
* Override to return a chaining listenableFuture that returns the result of getSuccessfulResult()
* when inputFuture returns VALID_INPUT_DATA, and sets the exception to EXCEPTION in all other
* cases.
*/
protected abstract ListenableFuture<T> buildChainingFuture(ListenableFuture<Integer> inputFuture);
/**
* Override to return the result when VALID_INPUT_DATA is passed in to the chaining
* listenableFuture
*/
protected abstract T getSuccessfulResult();
}
|
