MultimapContainsKeyTester.java revision 7dd252788645e940eada959bdde927426e2531c9 
1/*
2 * Copyright (C) 2012 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.google;
18
19import static com.google.common.collect.testing.features.CollectionSize.ZERO;
20import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
21import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_QUERIES;
22
23import com.google.common.annotations.GwtCompatible;
24import com.google.common.collect.Multimap;
25import com.google.common.collect.testing.features.CollectionSize;
26import com.google.common.collect.testing.features.MapFeature;
27
28/**
29 * Tester for the {@code containsKey} methods of {@code Multimap} and its {@code asMap()} view.
30 *
31 * @author Louis Wasserman
32 */
33@GwtCompatible
34public class MultimapContainsKeyTester<K, V>
35    extends AbstractMultimapTester<K, V, Multimap<K, V>> {
36  @CollectionSize.Require(absent = ZERO)
37  public void testContainsKeyYes() {
38    assertTrue(multimap().containsKey(sampleKeys().e0));
39  }
40
41  public void testContainsKeyNo() {
42    assertFalse(multimap().containsKey(sampleKeys().e3));
43  }
44
45  public void testContainsKeysFromKeySet() {
46    for (K k : multimap().keySet()) {
47      assertTrue(multimap().containsKey(k));
48    }
49  }
50
51  public void testContainsKeyAgreesWithGet() {
52    for (K k : sampleKeys()) {
53      assertEquals(!multimap().get(k).isEmpty(), multimap().containsKey(k));
54    }
55  }
56
57  public void testContainsKeyAgreesWithAsMap() {
58    for (K k : sampleKeys()) {
59      assertEquals(multimap().containsKey(k), multimap().asMap().containsKey(k));
60    }
61  }
62
63  public void testContainsKeyAgreesWithKeySet() {
64    for (K k : sampleKeys()) {
65      assertEquals(multimap().containsKey(k), multimap().keySet().contains(k));
66    }
67  }
68
69  @MapFeature.Require(ALLOWS_NULL_KEYS)
70  @CollectionSize.Require(absent = ZERO)
71  public void testContainsKeyNullPresent() {
72    initMultimapWithNullKey();
73    assertTrue(multimap().containsKey(null));
74  }
75
76  @MapFeature.Require(ALLOWS_NULL_QUERIES)
77  public void testContainsKeyNullAbsent() {
78    assertFalse(multimap().containsKey(null));
79  }
80
81  @MapFeature.Require(absent = ALLOWS_NULL_QUERIES)
82  public void testContainsKeyNullDisallowed() {
83    try {
84      multimap().containsKey(null);
85      fail("Expected NullPointerException");
86    } catch (NullPointerException expected) {
87      // success
88    }
89  }
90}
91