1/*
2 * Copyright (C) 2008 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.*;
21
22import com.google.common.collect.testing.AbstractMapTester;
23import com.google.common.collect.testing.WrongType;
24import com.google.common.collect.testing.features.CollectionSize;
25import com.google.common.collect.testing.features.MapFeature;
26
27/**
28 * A generic JUnit test which tests {@code containsValue()} operations on a map.
29 * Can't be invoked directly; please see
30 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
31 *
32 * <p>This class is GWT compatible.
33 *
34 * @author George van den Driessche
35 * @author Chris Povirk
36 */
37public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V> {
38  @CollectionSize.Require(absent = ZERO)
39  public void testContains_yes() {
40    assertTrue("containsValue(present) should return true",
41        getMap().containsValue(samples.e0.getValue()));
42  }
43
44  public void testContains_no() {
45    assertFalse("containsValue(notPresent) should return false",
46        getMap().containsValue(samples.e3.getValue()));
47  }
48
49  @MapFeature.Require(ALLOWS_NULL_QUERIES)
50  public void testContains_nullNotContainedButAllowed() {
51    assertFalse("containsValue(null) should return false",
52        getMap().containsValue(null));
53  }
54
55  @MapFeature.Require(absent = ALLOWS_NULL_QUERIES)
56  public void testContains_nullNotContainedAndUnsupported() {
57    expectNullValueMissingWhenNullValuesUnsupported(
58        "containsValue(null) should return false or throw");
59  }
60
61  @MapFeature.Require(ALLOWS_NULL_VALUES)
62  @CollectionSize.Require(absent = ZERO)
63  public void testContains_nonNullWhenNullContained() {
64    initMapWithNullValue();
65    assertFalse("containsValue(notPresent) should return false",
66        getMap().containsValue(samples.e3.getValue()));
67  }
68
69  @MapFeature.Require(ALLOWS_NULL_VALUES)
70  @CollectionSize.Require(absent = ZERO)
71  public void testContains_nullContained() {
72    initMapWithNullValue();
73    assertTrue("containsValue(null) should return true",
74        getMap().containsValue(null));
75  }
76
77  public void testContains_wrongType() {
78    try {
79      //noinspection SuspiciousMethodCalls
80      assertFalse("containsValue(wrongType) should return false or throw",
81          getMap().containsValue(WrongType.VALUE));
82    } catch (ClassCastException tolerated) {
83    }
84  }
85}
86