MapEntrySetTester.java revision 0888a09821a98ac0680fad765217302858e70fa4 
1/*
2 * Copyright (C) 2013 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.CollectionFeature.SUPPORTS_ITERATOR_REMOVE;
20import static com.google.common.collect.testing.features.CollectionSize.ONE;
21import static com.google.common.collect.testing.features.CollectionSize.ZERO;
22import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
23import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
24import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
25import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
26
27import com.google.common.annotations.GwtCompatible;
28import com.google.common.annotations.GwtIncompatible;
29import com.google.common.collect.testing.AbstractMapTester;
30import com.google.common.collect.testing.Helpers;
31import com.google.common.collect.testing.features.CollectionFeature;
32import com.google.common.collect.testing.features.CollectionSize;
33import com.google.common.collect.testing.features.MapFeature;
34
35import java.lang.reflect.Method;
36import java.util.Iterator;
37import java.util.Map.Entry;
38import java.util.Set;
39
40/**
41 * Tests {@link java.util.Map#entrySet}.
42 *
43 * @author Louis Wasserman
44 * @param <K> The key type of the map implementation under test.
45 * @param <V> The value type of the map implementation under test.
46 */
47@GwtCompatible
48public class MapEntrySetTester<K, V> extends AbstractMapTester<K, V> {
49  private enum IncomparableType {
50    INSTANCE;
51  }
52
53  @CollectionSize.Require(ONE)
54  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
55  public void testEntrySetIteratorRemove() {
56    Set<Entry<K, V>> entrySet = getMap().entrySet();
57    Iterator<Entry<K, V>> entryItr = entrySet.iterator();
58    assertEquals(samples.e0, entryItr.next());
59    entryItr.remove();
60    assertTrue(getMap().isEmpty());
61    assertFalse(entrySet.contains(samples.e0));
62  }
63
64  public void testContainsEntryWithIncomparableKey() {
65    assertFalse(getMap()
66        .entrySet().contains(Helpers.mapEntry(IncomparableType.INSTANCE, samples.e0.getValue())));
67  }
68
69  public void testContainsEntryWithIncomparableValue() {
70    assertFalse(getMap()
71        .entrySet().contains(Helpers.mapEntry(samples.e0.getKey(), IncomparableType.INSTANCE)));
72  }
73
74  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
75  public void testContainsEntryWithNullKeyAbsent() {
76    assertFalse(getMap()
77        .entrySet().contains(Helpers.mapEntry(null, samples.e0.getValue())));
78  }
79
80  @CollectionSize.Require(absent = ZERO)
81  @MapFeature.Require(ALLOWS_NULL_KEYS)
82  public void testContainsEntryWithNullKeyPresent() {
83    initMapWithNullKey();
84    assertTrue(getMap()
85        .entrySet().contains(Helpers.mapEntry(null, getValueForNullKey())));
86  }
87
88  @MapFeature.Require(ALLOWS_NULL_VALUE_QUERIES)
89  public void testContainsEntryWithNullValueAbsent() {
90    assertFalse(getMap()
91        .entrySet().contains(Helpers.mapEntry(samples.e0.getKey(), null)));
92  }
93
94  @CollectionSize.Require(absent = ZERO)
95  @MapFeature.Require(ALLOWS_NULL_VALUES)
96  public void testContainsEntryWithNullValuePresent() {
97    initMapWithNullValue();
98    assertTrue(getMap()
99        .entrySet().contains(Helpers.mapEntry(getKeyForNullValue(), null)));
100  }
101
102  @GwtIncompatible("reflection")
103  public static Method getContainsEntryWithIncomparableKeyMethod() {
104    return Helpers.getMethod(MapEntrySetTester.class, "testContainsEntryWithIncomparableKey");
105  }
106
107  @GwtIncompatible("reflection")
108  public static Method getContainsEntryWithIncomparableValueMethod() {
109    return Helpers.getMethod(MapEntrySetTester.class, "testContainsEntryWithIncomparableValue");
110  }
111}
112