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

1 /*
2  * Copyright (C) 2015 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_KEY_QUERIES;
21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
22 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
23 import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
24 
25 import com.google.common.annotations.GwtCompatible;
26 import com.google.common.collect.testing.AbstractMapTester;
27 import com.google.common.collect.testing.features.CollectionSize;
28 import com.google.common.collect.testing.features.MapFeature;
29 import java.util.concurrent.ConcurrentMap;
30 import org.junit.Ignore;
31 
32 /**
33  * A generic JUnit test which tests {@code replace(K, V)} operations on a concurrent map. Can't be
34  * invoked directly; please see {@link
35  * com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
36  *
37  * @author Louis Wasserman
38  */
39 @GwtCompatible
40 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
41 public class ConcurrentMapReplaceTester<K, V> extends AbstractMapTester<K, V> {
42   @Override
43   protected ConcurrentMap<K, V> getMap() {
44     return (ConcurrentMap<K, V>) super.getMap();
45   }
46 
47   @MapFeature.Require(SUPPORTS_PUT)
48   @CollectionSize.Require(absent = ZERO)
49   public void testReplace_supportedPresent() {
50     assertEquals(v0(), getMap().replace(k0(), v3()));
51     expectReplacement(entry(k0(), v3()));
52   }
53 
54   @MapFeature.Require(SUPPORTS_PUT)
55   @CollectionSize.Require(absent = ZERO)
56   public void testReplace_supportedPresentNoChange() {
57     assertEquals(v0(), getMap().replace(k0(), v0()));
58     expectUnchanged();
59   }
60 
61   @MapFeature.Require(SUPPORTS_PUT)
62   public void testReplace_supportedAbsent() {
63     assertNull(getMap().replace(k3(), v3()));
64     expectUnchanged();
65   }
66 
67   @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
68   @CollectionSize.Require(absent = ZERO)
69   public void testReplace_presentNullValueUnsupported() {
70     try {
71       getMap().replace(k0(), null);
72       fail("Expected NullPointerException");
73     } catch (NullPointerException expected) {
74     }
75     expectUnchanged();
76   }
77 
78   @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
79   public void testReplace_absentNullValueUnsupported() {
80     try {
81       getMap().replace(k3(), null);
82     } catch (NullPointerException tolerated) {
83       // permitted not to throw because it would be a no-op
84     }
85     expectUnchanged();
86   }
87 
88   @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEY_QUERIES)
89   public void testReplace_absentNullKeyUnsupported() {
90     try {
91       getMap().replace(null, v3());
92     } catch (NullPointerException tolerated) {
93       // permitted not to throw because it would be a no-op
94     }
95     expectUnchanged();
96   }
97 
98   @MapFeature.Require(absent = SUPPORTS_PUT)
99   @CollectionSize.Require(absent = ZERO)
100   public void testReplace_unsupportedPresent() {
101     try {
102       getMap().replace(k0(), v3());
103       fail("Expected UnsupportedOperationException");
104     } catch (UnsupportedOperationException expected) {
105     }
106     expectUnchanged();
107   }
108 }