guava
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1/*
2* Copyright (C) 2015 The Guava Authors
3*
4* Licensed under the Apache License, Version 2.0 (the "License");
5* you may not use this file except in compliance with the License.
6* You may obtain a copy of 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,
12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13* See the License for the specific language governing permissions and
14* limitations under the License.
15*/
16
17package com.google.common.collect.testing.testers;
18
19import static com.google.common.collect.testing.features.CollectionSize.ZERO;
20import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
21import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
22import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
23import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
24
25import com.google.common.annotations.GwtCompatible;
26import com.google.common.collect.testing.AbstractMapTester;
27import com.google.common.collect.testing.features.CollectionSize;
28import com.google.common.collect.testing.features.MapFeature;
29import java.util.Map;
30import org.junit.Ignore;
31
32/**
33* A generic JUnit test which tests {@link Map#replace(Object, Object)}. Can't be invoked directly;
34* please see {@link com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
35*
36* @author Louis Wasserman
37*/
38@GwtCompatible
39@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
40public class MapReplaceTester<K, V> extends AbstractMapTester<K, V> {
41
42@MapFeature.Require(SUPPORTS_PUT)
43@CollectionSize.Require(absent = ZERO)
44public void testReplace_supportedPresent() {
45try {
46assertEquals(v0(), getMap().replace(k0(), v3()));
47expectReplacement(entry(k0(), v3()));
48} catch (ClassCastException tolerated) { // for ClassToInstanceMap
49expectUnchanged();
50}
51}
52
53@MapFeature.Require(SUPPORTS_PUT)
54@CollectionSize.Require(absent = ZERO)
55public void testReplace_supportedPresentNoChange() {
56assertEquals(v0(), getMap().replace(k0(), v0()));
57expectUnchanged();
58}
59
60@MapFeature.Require(SUPPORTS_PUT)
61public void testReplace_supportedAbsent() {
62assertNull(getMap().replace(k3(), v3()));
63expectUnchanged();
64}
65
66@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
67@CollectionSize.Require(absent = ZERO)
68public void testReplace_presentNullValueUnsupported() {
69try {
70getMap().replace(k0(), null);
71fail("Expected NullPointerException");
72} catch (NullPointerException expected) {
73}
74expectUnchanged();
75}
76
77@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
78public void testReplace_absentNullValueUnsupported() {
79try {
80getMap().replace(k3(), null);
81} catch (NullPointerException tolerated) {
82// permitted not to throw because it would be a no-op
83}
84expectUnchanged();
85}
86
87@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEY_QUERIES)
88public void testReplace_absentNullKeyUnsupported() {
89try {
90getMap().replace(null, v3());
91} catch (NullPointerException tolerated) {
92// permitted not to throw because it would be a no-op
93}
94expectUnchanged();
95}
96
97@MapFeature.Require(absent = SUPPORTS_PUT)
98@CollectionSize.Require(absent = ZERO)
99public void testReplace_unsupportedPresent() {
100try {
101getMap().replace(k0(), v3());
102fail("Expected UnsupportedOperationException");
103} catch (UnsupportedOperationException expected) {
104} catch (ClassCastException tolerated) {
105// for ClassToInstanceMap
106}
107
108expectUnchanged();
109}
110}
111