Coverage Summary for Class: MultimapKeySetTester (com.google.common.collect.testing.google)

1 /*
2  * Copyright (C) 2013 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5  * in compliance with the License. You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the License
10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11  * or implied. See the License for the specific language governing permissions and limitations under
12  * the License.
13  */
14 
15 package com.google.common.collect.testing.google;
16 
17 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE;
18 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
19 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
21 import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
22 
23 import com.google.common.annotations.GwtCompatible;
24 import com.google.common.collect.Multimap;
25 import com.google.common.collect.testing.features.CollectionFeature;
26 import com.google.common.collect.testing.features.CollectionSize;
27 import com.google.common.collect.testing.features.MapFeature;
28 import java.util.Iterator;
29 import java.util.Map.Entry;
30 import org.junit.Ignore;
31 
32 /**
33  * Tester for {@code Multimap.keySet}.
34  *
35  * @author Louis Wasserman
36  */
37 @GwtCompatible
38 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
39 public class MultimapKeySetTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
40   public void testKeySet() {
41     for (Entry<K, V> entry : getSampleElements()) {
42       assertTrue(multimap().keySet().contains(entry.getKey()));
43     }
44   }
45 
46   @CollectionSize.Require(absent = ZERO)
47   @MapFeature.Require(ALLOWS_NULL_KEYS)
48   public void testKeySetContainsNullKeyPresent() {
49     initMultimapWithNullKey();
50     assertTrue(multimap().keySet().contains(null));
51   }
52 
53   @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
54   public void testKeySetContainsNullKeyAbsent() {
55     assertFalse(multimap().keySet().contains(null));
56   }
57 
58   @MapFeature.Require(SUPPORTS_REMOVE)
59   public void testKeySetRemovePropagatesToMultimap() {
60     int key0Count = multimap().get(k0()).size();
61     assertEquals(key0Count > 0, multimap().keySet().remove(k0()));
62     assertEquals(getNumElements() - key0Count, multimap().size());
63     assertGet(k0());
64   }
65 
66   @CollectionSize.Require(absent = ZERO)
67   @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
68   public void testKeySetIteratorRemove() {
69     int key0Count = multimap().get(k0()).size();
70     Iterator<K> keyItr = multimap().keySet().iterator();
71     while (keyItr.hasNext()) {
72       if (keyItr.next().equals(k0())) {
73         keyItr.remove();
74       }
75     }
76     assertEquals(getNumElements() - key0Count, multimap().size());
77     assertGet(k0());
78   }
79 }