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

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.testers;
16 
17 import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
18 import static com.google.common.collect.testing.features.CollectionSize.ONE;
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_VALUES;
22 
23 import com.google.common.annotations.GwtCompatible;
24 import com.google.common.collect.testing.AbstractMapTester;
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.LinkedHashMap;
29 import java.util.Map;
30 import java.util.Map.Entry;
31 import java.util.Set;
32 import org.junit.Ignore;
33 
34 /**
35  * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked
36  * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
37  *
38  * @author Kevin Bourrillion
39  * @author Louis Wasserman
40  */
41 @GwtCompatible
42 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
43 public class MapToStringTester<K, V> extends AbstractMapTester<K, V> {
44   public void testToString_minimal() {
45     assertNotNull("toString() should not return null", getMap().toString());
46   }
47 
48   @CollectionSize.Require(ZERO)
49   @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
50   public void testToString_size0() {
51     assertEquals("emptyMap.toString should return {}", "{}", getMap().toString());
52   }
53 
54   @CollectionSize.Require(ONE)
55   @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
56   public void testToString_size1() {
57     assertEquals("size1Map.toString should return {entry}", "{" + e0() + "}", getMap().toString());
58   }
59 
60   @CollectionSize.Require(absent = ZERO)
61   @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
62   @MapFeature.Require(ALLOWS_NULL_KEYS)
63   public void testToStringWithNullKey() {
64     initMapWithNullKey();
65     testToString_formatting();
66   }
67 
68   @CollectionSize.Require(absent = ZERO)
69   @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
70   @MapFeature.Require(ALLOWS_NULL_VALUES)
71   public void testToStringWithNullValue() {
72     initMapWithNullValue();
73     testToString_formatting();
74   }
75 
76   @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
77   public void testToString_formatting() {
78     assertEquals(
79         "map.toString() incorrect", expectedToString(getMap().entrySet()), getMap().toString());
80   }
81 
82   private String expectedToString(Set<Entry<K, V>> entries) {
83     Map<K, V> reference = new LinkedHashMap<>();
84     for (Entry<K, V> entry : entries) {
85       reference.put(entry.getKey(), entry.getValue());
86     }
87     return reference.toString();
88   }
89 }