1 /* 2 * Copyright (C) 2007 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.testers; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_QUERIES; 20 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 21 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 22 23 import com.google.common.annotations.GwtCompatible; 24 import com.google.common.collect.testing.AbstractCollectionTester; 25 import com.google.common.collect.testing.WrongType; 26 import com.google.common.collect.testing.features.CollectionFeature; 27 import com.google.common.collect.testing.features.CollectionSize; 28 29 /** 30 * A generic JUnit test which tests {@code contains()} operations on a 31 * collection. Can't be invoked directly; please see 32 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 33 * 34 * @author Kevin Bourrillion 35 * @author Chris Povirk 36 */ 37 @GwtCompatible 38 public class CollectionContainsTester<E> extends AbstractCollectionTester<E> { 39 @CollectionSize.Require(absent = ZERO) testContains_yes()40 public void testContains_yes() { 41 assertTrue("contains(present) should return true", 42 collection.contains(samples.e0)); 43 } 44 testContains_no()45 public void testContains_no() { 46 assertFalse("contains(notPresent) should return false", 47 collection.contains(samples.e3)); 48 } 49 50 @CollectionFeature.Require(ALLOWS_NULL_QUERIES) testContains_nullNotContainedButQueriesSupported()51 public void testContains_nullNotContainedButQueriesSupported() { 52 assertFalse("contains(null) should return false", 53 collection.contains(null)); 54 } 55 56 @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES) testContains_nullNotContainedAndUnsupported()57 public void testContains_nullNotContainedAndUnsupported() { 58 expectNullMissingWhenNullUnsupported( 59 "contains(null) should return false or throw"); 60 } 61 62 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 63 @CollectionSize.Require(absent = ZERO) testContains_nonNullWhenNullContained()64 public void testContains_nonNullWhenNullContained() { 65 initCollectionWithNullElement(); 66 assertFalse("contains(notPresent) should return false", 67 collection.contains(samples.e3)); 68 } 69 70 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 71 @CollectionSize.Require(absent = ZERO) testContains_nullContained()72 public void testContains_nullContained() { 73 initCollectionWithNullElement(); 74 assertTrue("contains(null) should return true", collection.contains(null)); 75 } 76 testContains_wrongType()77 public void testContains_wrongType() { 78 try { 79 assertFalse("contains(wrongType) should return false or throw", 80 collection.contains(WrongType.VALUE)); 81 } catch (ClassCastException tolerated) { 82 } 83 } 84 } 85