Coverage Summary for Class: MultisetElementSetTester (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");
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.google;
18 
19 import static com.google.common.collect.testing.Helpers.assertEmpty;
20 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
21 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
22 import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
23 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
24 
25 import com.google.common.annotations.GwtCompatible;
26 import com.google.common.annotations.GwtIncompatible;
27 import com.google.common.collect.testing.Helpers;
28 import com.google.common.collect.testing.features.CollectionFeature;
29 import com.google.common.collect.testing.features.CollectionSize;
30 import java.lang.reflect.Method;
31 import java.util.Arrays;
32 import java.util.Collections;
33 import java.util.List;
34 import java.util.Set;
35 import org.junit.Ignore;
36 
37 /**
38  * Tests for {@code Multiset.elementSet()} not covered by the derived {@code SetTestSuiteBuilder}.
39  *
40  * @author Louis Wasserman
41  */
42 @GwtCompatible
43 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
44 public class MultisetElementSetTester<E> extends AbstractMultisetTester<E> {
45   @CollectionFeature.Require(SUPPORTS_ADD)
46   public void testElementSetReflectsAddAbsent() {
47     Set<E> elementSet = getMultiset().elementSet();
48     assertFalse(elementSet.contains(e3()));
49     getMultiset().add(e3(), 4);
50     assertTrue(elementSet.contains(e3()));
51   }
52 
53   @CollectionSize.Require(absent = ZERO)
54   @CollectionFeature.Require(SUPPORTS_REMOVE)
55   public void testElementSetReflectsRemove() {
56     Set<E> elementSet = getMultiset().elementSet();
57     assertTrue(elementSet.contains(e0()));
58     getMultiset().removeAll(Collections.singleton(e0()));
59     assertFalse(elementSet.contains(e0()));
60   }
61 
62   @CollectionSize.Require(absent = ZERO)
63   @CollectionFeature.Require(SUPPORTS_REMOVE)
64   public void testElementSetRemovePropagatesToMultiset() {
65     Set<E> elementSet = getMultiset().elementSet();
66     int size = getNumElements();
67     int expectedSize = size - getMultiset().count(e0());
68     assertTrue(elementSet.remove(e0()));
69     assertFalse(getMultiset().contains(e0()));
70     assertEquals(expectedSize, getMultiset().size());
71   }
72 
73   @CollectionSize.Require(SEVERAL)
74   @CollectionFeature.Require(SUPPORTS_REMOVE)
75   public void testElementSetRemoveDuplicatePropagatesToMultiset() {
76     initThreeCopies();
77     int size = getNumElements();
78     int expectedSize = size - getMultiset().count(e0());
79     Set<E> elementSet = getMultiset().elementSet();
80     assertTrue(elementSet.remove(e0()));
81     assertEmpty(getMultiset());
82     assertEquals(expectedSize, getMultiset().size());
83   }
84 
85   @CollectionFeature.Require(SUPPORTS_REMOVE)
86   public void testElementSetRemoveAbsent() {
87     Set<E> elementSet = getMultiset().elementSet();
88     assertFalse(elementSet.remove(e3()));
89     expectUnchanged();
90   }
91 
92   @CollectionFeature.Require(SUPPORTS_REMOVE)
93   public void testElementSetClear() {
94     getMultiset().elementSet().clear();
95     assertEmpty(getMultiset());
96   }
97 
98   /**
99    * Returns {@link Method} instances for the read tests that assume multisets support duplicates so
100    * that the test of {@code Multisets.forSet()} can suppress them.
101    */
102   @GwtIncompatible // reflection
103   public static List<Method> getElementSetDuplicateInitializingMethods() {
104     return Arrays.asList(
105         Helpers.getMethod(
106             MultisetElementSetTester.class, "testElementSetRemoveDuplicatePropagatesToMultiset"));
107   }
108 }