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
|
/*
* Copyright (C) 2012 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 org.mockito.Answers.CALLS_REAL_METHODS;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import com.google.common.base.Function;
import com.google.common.collect.ForwardingObject;
import com.google.common.collect.Iterables;
import com.google.common.testing.ForwardingWrapperTester;
import java.lang.reflect.Method;
import java.util.Arrays;
/**
* Tester for typical subclass of {@link ForwardingObject} by using EasyMock partial mocks.
*
* @author Ben Yu
*/
final class ForwardingObjectTester {
private static final Method DELEGATE_METHOD;
static {
try {
DELEGATE_METHOD = ForwardingObject.class.getDeclaredMethod("delegate");
DELEGATE_METHOD.setAccessible(true);
} catch (SecurityException e) {
throw new RuntimeException(e);
} catch (NoSuchMethodException e) {
throw new AssertionError(e);
}
}
/**
* Ensures that all interface methods of {@code forwarderClass} are forwarded to the {@link
* ForwardingObject#delegate}. {@code forwarderClass} is assumed to only implement one interface.
*/
static <T extends ForwardingObject> void testForwardingObject(final Class<T> forwarderClass) {
@SuppressWarnings("unchecked") // super interface type of T
Class<? super T> interfaceType =
(Class<? super T>) Iterables.getOnlyElement(Arrays.asList(forwarderClass.getInterfaces()));
new ForwardingWrapperTester()
.testForwarding(
interfaceType,
new Function<Object, T>() {
@Override
public T apply(Object delegate) {
T mock = mock(forwarderClass, CALLS_REAL_METHODS);
try {
T stubber = doReturn(delegate).when(mock);
DELEGATE_METHOD.invoke(stubber);
} catch (Exception e) {
throw new RuntimeException(e);
}
return mock;
}
});
}
}
|
