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

1 /*
2  * Copyright (C) 2007 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 
17 package com.google.common.collect.testing.testers;
18 
19 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
22 
23 import com.google.common.annotations.GwtCompatible;
24 import com.google.common.collect.testing.AbstractMapTester;
25 import com.google.common.collect.testing.WrongType;
26 import com.google.common.collect.testing.features.CollectionSize;
27 import com.google.common.collect.testing.features.MapFeature;
28 import org.junit.Ignore;
29 
30 /**
31  * A generic JUnit test which tests {@code get} operations on a map. Can't be invoked directly;
32  * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
33  *
34  * @author Kevin Bourrillion
35  * @author Chris Povirk
36  */
37 @GwtCompatible
38 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
39 public class MapGetTester<K, V> extends AbstractMapTester<K, V> {
40   @CollectionSize.Require(absent = ZERO)
41   public void testGet_yes() {
42     assertEquals("get(present) should return the associated value", v0(), get(k0()));
43   }
44 
45   public void testGet_no() {
46     assertNull("get(notPresent) should return null", get(k3()));
47   }
48 
49   @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
50   public void testGet_nullNotContainedButAllowed() {
51     assertNull("get(null) should return null", get(null));
52   }
53 
54   @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
55   public void testGet_nullNotContainedAndUnsupported() {
56     try {
57       assertNull("get(null) should return null or throw", get(null));
58     } catch (NullPointerException tolerated) {
59     }
60   }
61 
62   @MapFeature.Require(ALLOWS_NULL_KEYS)
63   @CollectionSize.Require(absent = ZERO)
64   public void testGet_nonNullWhenNullContained() {
65     initMapWithNullKey();
66     assertNull("get(notPresent) should return null", get(k3()));
67   }
68 
69   @MapFeature.Require(ALLOWS_NULL_KEYS)
70   @CollectionSize.Require(absent = ZERO)
71   public void testGet_nullContained() {
72     initMapWithNullKey();
73     assertEquals("get(null) should return the associated value", getValueForNullKey(), get(null));
74   }
75 
76   public void testGet_wrongType() {
77     try {
78       assertNull("get(wrongType) should return null or throw", getMap().get(WrongType.VALUE));
79     } catch (ClassCastException tolerated) {
80     }
81   }
82 }