001/* 002 * Copyright (C) 2008 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.testers; 018 019import static com.google.common.collect.testing.features.CollectionSize.ZERO; 020import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES; 022 023import com.google.common.annotations.GwtCompatible; 024import com.google.common.collect.testing.AbstractMapTester; 025import com.google.common.collect.testing.WrongType; 026import com.google.common.collect.testing.features.CollectionSize; 027import com.google.common.collect.testing.features.MapFeature; 028 029/** 030 * A generic JUnit test which tests {@code containsValue()} operations on a map. Can't be invoked 031 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 032 * 033 * @author George van den Driessche 034 * @author Chris Povirk 035 */ 036@GwtCompatible 037public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V> { 038 @CollectionSize.Require(absent = ZERO) 039 public void testContains_yes() { 040 assertTrue("containsValue(present) should return true", getMap().containsValue(v0())); 041 } 042 043 public void testContains_no() { 044 assertFalse("containsValue(notPresent) should return false", getMap().containsValue(v3())); 045 } 046 047 @MapFeature.Require(ALLOWS_NULL_VALUE_QUERIES) 048 public void testContains_nullNotContainedButAllowed() { 049 assertFalse("containsValue(null) should return false", getMap().containsValue(null)); 050 } 051 052 @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES) 053 public void testContains_nullNotContainedAndUnsupported() { 054 expectNullValueMissingWhenNullValuesUnsupported( 055 "containsValue(null) should return false or throw"); 056 } 057 058 @MapFeature.Require(ALLOWS_NULL_VALUES) 059 @CollectionSize.Require(absent = ZERO) 060 public void testContains_nonNullWhenNullContained() { 061 initMapWithNullValue(); 062 assertFalse("containsValue(notPresent) should return false", getMap().containsValue(v3())); 063 } 064 065 @MapFeature.Require(ALLOWS_NULL_VALUES) 066 @CollectionSize.Require(absent = ZERO) 067 public void testContains_nullContained() { 068 initMapWithNullValue(); 069 assertTrue("containsValue(null) should return true", getMap().containsValue(null)); 070 } 071 072 public void testContains_wrongType() { 073 try { 074 // noinspection SuspiciousMethodCalls 075 assertFalse( 076 "containsValue(wrongType) should return false or throw", 077 getMap().containsValue(WrongType.VALUE)); 078 } catch (ClassCastException tolerated) { 079 } 080 } 081}