001/* 002 * Copyright (C) 2013 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing.google; 018 019import static com.google.common.collect.testing.Helpers.assertEmpty; 020import static com.google.common.collect.testing.features.CollectionSize.ZERO; 021import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE; 022import static com.google.common.collect.testing.google.GoogleHelpers.assertEmpty; 023 024import com.google.common.annotations.GwtCompatible; 025import com.google.common.collect.Multimap; 026import com.google.common.collect.testing.features.CollectionSize; 027import com.google.common.collect.testing.features.MapFeature; 028import java.util.Collection; 029import java.util.Map; 030import java.util.Map.Entry; 031import org.junit.Ignore; 032 033/** 034 * Tests for {@link Multimap#clear()}. 035 * 036 * @author Louis Wasserman 037 */ 038@GwtCompatible 039@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 040public class MultimapClearTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> { 041 @CollectionSize.Require(absent = ZERO) 042 @MapFeature.Require(absent = SUPPORTS_REMOVE) 043 public void testClearUnsupported() { 044 try { 045 multimap().clear(); 046 fail("Expected UnsupportedOperationException"); 047 } catch (UnsupportedOperationException expected) { 048 } 049 } 050 051 private void assertCleared() { 052 assertEquals(0, multimap().size()); 053 assertEmpty(multimap()); 054 assertEquals(multimap(), getSubjectGenerator().create()); 055 assertEmpty(multimap().entries()); 056 assertEmpty(multimap().asMap()); 057 assertEmpty(multimap().keySet()); 058 assertEmpty(multimap().keys()); 059 assertEmpty(multimap().values()); 060 for (K key : sampleKeys()) { 061 assertGet(key); 062 } 063 } 064 065 @MapFeature.Require(SUPPORTS_REMOVE) 066 public void testClear() { 067 multimap().clear(); 068 assertCleared(); 069 } 070 071 @MapFeature.Require(SUPPORTS_REMOVE) 072 public void testClearThroughEntries() { 073 multimap().entries().clear(); 074 assertCleared(); 075 } 076 077 @MapFeature.Require(SUPPORTS_REMOVE) 078 public void testClearThroughAsMap() { 079 multimap().asMap().clear(); 080 assertCleared(); 081 } 082 083 @MapFeature.Require(SUPPORTS_REMOVE) 084 public void testClearThroughKeySet() { 085 multimap().keySet().clear(); 086 assertCleared(); 087 } 088 089 @MapFeature.Require(SUPPORTS_REMOVE) 090 public void testClearThroughKeys() { 091 multimap().keys().clear(); 092 assertCleared(); 093 } 094 095 @MapFeature.Require(SUPPORTS_REMOVE) 096 public void testClearThroughValues() { 097 multimap().values().clear(); 098 assertCleared(); 099 } 100 101 @MapFeature.Require(SUPPORTS_REMOVE) 102 @CollectionSize.Require(absent = ZERO) 103 public void testClearPropagatesToGet() { 104 for (K key : sampleKeys()) { 105 resetContainer(); 106 Collection<V> collection = multimap().get(key); 107 multimap().clear(); 108 assertEmpty(collection); 109 } 110 } 111 112 @MapFeature.Require(SUPPORTS_REMOVE) 113 @CollectionSize.Require(absent = ZERO) 114 public void testClearPropagatesToAsMapGet() { 115 for (K key : sampleKeys()) { 116 resetContainer(); 117 Collection<V> collection = multimap().asMap().get(key); 118 if (collection != null) { 119 multimap().clear(); 120 assertEmpty(collection); 121 } 122 } 123 } 124 125 @MapFeature.Require(SUPPORTS_REMOVE) 126 public void testClearPropagatesToAsMap() { 127 Map<K, Collection<V>> asMap = multimap().asMap(); 128 multimap().clear(); 129 assertEmpty(asMap); 130 } 131 132 @MapFeature.Require(SUPPORTS_REMOVE) 133 public void testClearPropagatesToEntries() { 134 Collection<Entry<K, V>> entries = multimap().entries(); 135 multimap().clear(); 136 assertEmpty(entries); 137 } 138}