001/* 002 * Copyright (C) 2013 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 */ 014 015package com.google.common.collect.testing.google; 016 017import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE; 018import static com.google.common.collect.testing.features.CollectionSize.ZERO; 019import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 020import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES; 021import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE; 022 023import com.google.common.annotations.GwtCompatible; 024import com.google.common.collect.Multimap; 025import com.google.common.collect.testing.features.CollectionFeature; 026import com.google.common.collect.testing.features.CollectionSize; 027import com.google.common.collect.testing.features.MapFeature; 028import java.util.Iterator; 029import java.util.Map.Entry; 030import org.junit.Ignore; 031 032/** 033 * Tester for {@code Multimap.keySet}. 034 * 035 * @author Louis Wasserman 036 */ 037@GwtCompatible 038@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 039public class MultimapKeySetTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> { 040 public void testKeySet() { 041 for (Entry<K, V> entry : getSampleElements()) { 042 assertTrue(multimap().keySet().contains(entry.getKey())); 043 } 044 } 045 046 @CollectionSize.Require(absent = ZERO) 047 @MapFeature.Require(ALLOWS_NULL_KEYS) 048 public void testKeySetContainsNullKeyPresent() { 049 initMultimapWithNullKey(); 050 assertTrue(multimap().keySet().contains(null)); 051 } 052 053 @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES) 054 public void testKeySetContainsNullKeyAbsent() { 055 assertFalse(multimap().keySet().contains(null)); 056 } 057 058 @MapFeature.Require(SUPPORTS_REMOVE) 059 public void testKeySetRemovePropagatesToMultimap() { 060 int key0Count = multimap().get(k0()).size(); 061 assertEquals(key0Count > 0, multimap().keySet().remove(k0())); 062 assertEquals(getNumElements() - key0Count, multimap().size()); 063 assertGet(k0()); 064 } 065 066 @CollectionSize.Require(absent = ZERO) 067 @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE) 068 public void testKeySetIteratorRemove() { 069 int key0Count = multimap().get(k0()).size(); 070 Iterator<K> keyItr = multimap().keySet().iterator(); 071 while (keyItr.hasNext()) { 072 if (keyItr.next().equals(k0())) { 073 keyItr.remove(); 074 } 075 } 076 assertEquals(getNumElements() - key0Count, multimap().size()); 077 assertGet(k0()); 078 } 079}