1 /* 2 * Copyright (C) 2008 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_VALUES; 20 import static com.google.common.collect.testing.features.CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION; 21 import static com.google.common.collect.testing.features.CollectionSize.ONE; 22 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 23 import static com.google.common.collect.testing.features.ListFeature.SUPPORTS_ADD_WITH_INDEX; 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 com.google.common.collect.testing.features.ListFeature; 31 32 import java.lang.reflect.Method; 33 import java.util.ConcurrentModificationException; 34 import java.util.Iterator; 35 36 /** 37 * A generic JUnit test which tests {@code add(int, Object)} operations on a 38 * list. Can't be invoked directly; please see 39 * {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 40 * 41 * @author Chris Povirk 42 */ 43 @SuppressWarnings("unchecked") // too many "unchecked generic array creations" 44 @GwtCompatible(emulated = true) 45 public class ListAddAtIndexTester<E> extends AbstractListTester<E> { 46 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 47 @CollectionSize.Require(absent = ZERO) 48 public void testAddAtIndex_supportedPresent() { 49 getList().add(0, samples.e0); 50 expectAdded(0, samples.e0); 51 } 52 53 @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX) 54 @CollectionSize.Require(absent = ZERO) 55 /* 56 * absent = ZERO isn't required, since unmodList.add() must 57 * throw regardless, but it keeps the method name accurate. 58 */ 59 public void testAddAtIndex_unsupportedPresent() { 60 try { 61 getList().add(0, samples.e0); 62 fail("add(n, present) should throw"); 63 } catch (UnsupportedOperationException expected) { 64 } 65 expectUnchanged(); 66 } 67 68 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 69 public void testAddAtIndex_supportedNotPresent() { 70 getList().add(0, samples.e3); 71 expectAdded(0, samples.e3); 72 } 73 74 @CollectionFeature.Require(FAILS_FAST_ON_CONCURRENT_MODIFICATION) 75 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 76 public void testAddAtIndexConcurrentWithIteration() { 77 try { 78 Iterator<E> iterator = collection.iterator(); 79 getList().add(0, samples.e3); 80 iterator.next(); 81 fail("Expected ConcurrentModificationException"); 82 } catch (ConcurrentModificationException expected) { 83 // success 84 } 85 } 86 87 @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX) 88 public void testAddAtIndex_unsupportedNotPresent() { 89 try { 90 getList().add(0, samples.e3); 91 fail("add(n, notPresent) should throw"); 92 } catch (UnsupportedOperationException expected) { 93 } 94 expectUnchanged(); 95 expectMissing(samples.e3); 96 } 97 98 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 99 @CollectionSize.Require(absent = {ZERO, ONE}) 100 public void testAddAtIndex_middle() { 101 getList().add(getNumElements() / 2, samples.e3); 102 expectAdded(getNumElements() / 2, samples.e3); 103 } 104 105 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 106 @CollectionSize.Require(absent = ZERO) 107 public void testAddAtIndex_end() { 108 getList().add(getNumElements(), samples.e3); 109 expectAdded(getNumElements(), samples.e3); 110 } 111 112 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 113 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 114 public void testAddAtIndex_nullSupported() { 115 getList().add(0, null); 116 expectAdded(0, (E) null); 117 } 118 119 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 120 @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES) 121 public void testAddAtIndex_nullUnsupported() { 122 try { 123 getList().add(0, null); 124 fail("add(n, null) should throw"); 125 } catch (NullPointerException expected) { 126 } 127 expectUnchanged(); 128 expectNullMissingWhenNullUnsupported( 129 "Should not contain null after unsupported add(n, null)"); 130 } 131 132 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 133 public void testAddAtIndex_negative() { 134 try { 135 getList().add(-1, samples.e3); 136 fail("add(-1, e) should throw"); 137 } catch (IndexOutOfBoundsException expected) { 138 } 139 expectUnchanged(); 140 expectMissing(samples.e3); 141 } 142 143 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 144 public void testAddAtIndex_tooLarge() { 145 try { 146 getList().add(getNumElements() + 1, samples.e3); 147 fail("add(size + 1, e) should throw"); 148 } catch (IndexOutOfBoundsException expected) { 149 } 150 expectUnchanged(); 151 expectMissing(samples.e3); 152 } 153 154 /** 155 * Returns the {@link Method} instance for 156 * {@link #testAddAtIndex_nullSupported()} so that tests can suppress it. See 157 * {@link CollectionAddTester#getAddNullSupportedMethod()} for details. 158 */ 159 @GwtIncompatible("reflection") 160 public static Method getAddNullSupportedMethod() { 161 return Helpers.getMethod( 162 ListAddAtIndexTester.class, "testAddAtIndex_nullSupported"); 163 } 164 } 165
