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.CollectionSize.ONE; 21 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 22 import static com.google.common.collect.testing.features.ListFeature.SUPPORTS_ADD_WITH_INDEX; 23 import static java.util.Collections.singletonList; 24 25 import com.google.common.annotations.GwtCompatible; 26 import com.google.common.collect.testing.MinimalCollection; 27 import com.google.common.collect.testing.features.CollectionFeature; 28 import com.google.common.collect.testing.features.CollectionSize; 29 import com.google.common.collect.testing.features.ListFeature; 30 31 import java.util.List; 32 33 /** 34 * A generic JUnit test which tests {@code addAll(int, Collection)} operations 35 * on a list. Can't be invoked directly; please see 36 * {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 37 * 38 * @author Chris Povirk 39 */ 40 @SuppressWarnings("unchecked") // too many "unchecked generic array creations" 41 @GwtCompatible 42 public class ListAddAllAtIndexTester<E> extends AbstractListTester<E> { 43 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 44 @CollectionSize.Require(absent = ZERO) testAddAllAtIndex_supportedAllPresent()45 public void testAddAllAtIndex_supportedAllPresent() { 46 assertTrue("addAll(n, allPresent) should return true", 47 getList().addAll(0, MinimalCollection.of(samples.e0))); 48 expectAdded(0, samples.e0); 49 } 50 51 @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX) 52 @CollectionSize.Require(absent = ZERO) testAddAllAtIndex_unsupportedAllPresent()53 public void testAddAllAtIndex_unsupportedAllPresent() { 54 try { 55 getList().addAll(0, MinimalCollection.of(samples.e0)); 56 fail("addAll(n, allPresent) should throw"); 57 } catch (UnsupportedOperationException expected) { 58 } 59 expectUnchanged(); 60 } 61 62 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 63 @CollectionSize.Require(absent = ZERO) testAddAllAtIndex_supportedSomePresent()64 public void testAddAllAtIndex_supportedSomePresent() { 65 assertTrue("addAll(n, allPresent) should return true", 66 getList().addAll(0, MinimalCollection.of(samples.e0, samples.e3))); 67 expectAdded(0, samples.e0, samples.e3); 68 } 69 70 @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX) 71 @CollectionSize.Require(absent = ZERO) testAddAllAtIndex_unsupportedSomePresent()72 public void testAddAllAtIndex_unsupportedSomePresent() { 73 try { 74 getList().addAll(0, MinimalCollection.of(samples.e0, samples.e3)); 75 fail("addAll(n, allPresent) should throw"); 76 } catch (UnsupportedOperationException expected) { 77 } 78 expectUnchanged(); 79 expectMissing(samples.e3); 80 } 81 82 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_supportedNothing()83 public void testAddAllAtIndex_supportedNothing() { 84 assertFalse("addAll(n, nothing) should return false", 85 getList().addAll(0, emptyCollection())); 86 expectUnchanged(); 87 } 88 89 @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_unsupportedNothing()90 public void testAddAllAtIndex_unsupportedNothing() { 91 try { 92 assertFalse("addAll(n, nothing) should return false or throw", 93 getList().addAll(0, emptyCollection())); 94 } catch (UnsupportedOperationException tolerated) { 95 } 96 expectUnchanged(); 97 } 98 99 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_withDuplicates()100 public void testAddAllAtIndex_withDuplicates() { 101 MinimalCollection<E> elementsToAdd 102 = MinimalCollection.of(samples.e0, samples.e1, samples.e0, samples.e1); 103 assertTrue("addAll(n, hasDuplicates) should return true", 104 getList().addAll(0, elementsToAdd)); 105 expectAdded(0, samples.e0, samples.e1, samples.e0, samples.e1); 106 } 107 108 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 109 @CollectionFeature.Require(ALLOWS_NULL_VALUES) testAddAllAtIndex_nullSupported()110 public void testAddAllAtIndex_nullSupported() { 111 List<E> containsNull = singletonList(null); 112 assertTrue("addAll(n, containsNull) should return true", 113 getList().addAll(0, containsNull)); 114 /* 115 * We need (E) to force interpretation of null as the single element of a 116 * varargs array, not the array itself 117 */ 118 expectAdded(0, (E) null); 119 } 120 121 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 122 @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES) testAddAllAtIndex_nullUnsupported()123 public void testAddAllAtIndex_nullUnsupported() { 124 List<E> containsNull = singletonList(null); 125 try { 126 getList().addAll(0, containsNull); 127 fail("addAll(n, containsNull) should throw"); 128 } catch (NullPointerException expected) { 129 } 130 expectUnchanged(); 131 expectNullMissingWhenNullUnsupported( 132 "Should not contain null after unsupported addAll(n, containsNull)"); 133 } 134 135 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 136 @CollectionSize.Require(absent = {ZERO, ONE}) testAddAllAtIndex_middle()137 public void testAddAllAtIndex_middle() { 138 assertTrue("addAll(middle, disjoint) should return true", 139 getList().addAll(getNumElements() / 2, createDisjointCollection())); 140 expectAdded(getNumElements() / 2, createDisjointCollection()); 141 } 142 143 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) 144 @CollectionSize.Require(absent = ZERO) testAddAllAtIndex_end()145 public void testAddAllAtIndex_end() { 146 assertTrue("addAll(end, disjoint) should return true", 147 getList().addAll(getNumElements(), createDisjointCollection())); 148 expectAdded(getNumElements(), createDisjointCollection()); 149 } 150 151 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_nullCollectionReference()152 public void testAddAllAtIndex_nullCollectionReference() { 153 try { 154 getList().addAll(0, null); 155 fail("addAll(n, null) should throw"); 156 } catch (NullPointerException expected) { 157 } 158 expectUnchanged(); 159 } 160 161 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_negative()162 public void testAddAllAtIndex_negative() { 163 try { 164 getList().addAll(-1, MinimalCollection.of(samples.e3)); 165 fail("addAll(-1, e) should throw"); 166 } catch (IndexOutOfBoundsException expected) { 167 } 168 expectUnchanged(); 169 expectMissing(samples.e3); 170 } 171 172 @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX) testAddAllAtIndex_tooLarge()173 public void testAddAllAtIndex_tooLarge() { 174 try { 175 getList().addAll(getNumElements() + 1, MinimalCollection.of(samples.e3)); 176 fail("addAll(size + 1, e) should throw"); 177 } catch (IndexOutOfBoundsException expected) { 178 } 179 expectUnchanged(); 180 expectMissing(samples.e3); 181 } 182 } 183