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; 18 19 import static com.google.common.truth.Truth.assertThat; 20 import static java.util.Arrays.asList; 21 22 import com.google.common.annotations.GwtCompatible; 23 import com.google.common.annotations.GwtIncompatible; 24 import com.google.common.collect.testing.features.CollectionFeature; 25 import com.google.common.collect.testing.features.CollectionSize; 26 import com.google.common.collect.testing.features.MapFeature; 27 import com.google.common.collect.testing.google.ListMultimapTestSuiteBuilder; 28 import com.google.common.collect.testing.google.TestStringListMultimapGenerator; 29 30 import junit.framework.Test; 31 import junit.framework.TestCase; 32 import junit.framework.TestSuite; 33 34 import java.util.ConcurrentModificationException; 35 import java.util.List; 36 import java.util.Map.Entry; 37 import java.util.RandomAccess; 38 39 /** 40 * Unit tests for {@code ArrayListMultimap}. 41 * 42 * @author Jared Levy 43 */ 44 @GwtCompatible(emulated = true) 45 public class ArrayListMultimapTest extends TestCase { 46 47 @GwtIncompatible("suite") 48 public static Test suite() { 49 TestSuite suite = new TestSuite(); 50 suite.addTest(ListMultimapTestSuiteBuilder.using(new TestStringListMultimapGenerator() { 51 @Override 52 protected ListMultimap<String, String> create(Entry<String, String>[] entries) { 53 ListMultimap<String, String> multimap = ArrayListMultimap.create(); 54 for (Entry<String, String> entry : entries) { 55 multimap.put(entry.getKey(), entry.getValue()); 56 } 57 return multimap; 58 } 59 }) 60 .named("ArrayListMultimap") 61 .withFeatures( 62 MapFeature.ALLOWS_NULL_KEYS, 63 MapFeature.ALLOWS_NULL_VALUES, 64 MapFeature.ALLOWS_ANY_NULL_QUERIES, 65 MapFeature.GENERAL_PURPOSE, 66 MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION, 67 CollectionFeature.SUPPORTS_ITERATOR_REMOVE, 68 CollectionFeature.SERIALIZABLE, 69 CollectionSize.ANY) 70 .createTestSuite()); 71 suite.addTestSuite(ArrayListMultimapTest.class); 72 return suite; 73 } 74 75 protected ListMultimap<String, Integer> create() { 76 return ArrayListMultimap.create(); 77 } 78 79 /** 80 * Confirm that get() returns a List implementing RandomAccess. 81 */ 82 public void testGetRandomAccess() { 83 Multimap<String, Integer> multimap = create(); 84 multimap.put("foo", 1); 85 multimap.put("foo", 3); 86 assertTrue(multimap.get("foo") instanceof RandomAccess); 87 assertTrue(multimap.get("bar") instanceof RandomAccess); 88 } 89 90 /** 91 * Confirm that removeAll() returns a List implementing RandomAccess. 92 */ 93 public void testRemoveAllRandomAccess() { 94 Multimap<String, Integer> multimap = create(); 95 multimap.put("foo", 1); 96 multimap.put("foo", 3); 97 assertTrue(multimap.removeAll("foo") instanceof RandomAccess); 98 assertTrue(multimap.removeAll("bar") instanceof RandomAccess); 99 } 100 101 /** 102 * Confirm that replaceValues() returns a List implementing RandomAccess. 103 */ 104 public void testReplaceValuesRandomAccess() { 105 Multimap<String, Integer> multimap = create(); 106 multimap.put("foo", 1); 107 multimap.put("foo", 3); 108 assertTrue(multimap.replaceValues("foo", asList(2, 4)) 109 instanceof RandomAccess); 110 assertTrue(multimap.replaceValues("bar", asList(2, 4)) 111 instanceof RandomAccess); 112 } 113 114 /** 115 * Test throwing ConcurrentModificationException when a sublist's ancestor's 116 * delegate changes. 117 */ 118 public void testSublistConcurrentModificationException() { 119 ListMultimap<String, Integer> multimap = create(); 120 multimap.putAll("foo", asList(1, 2, 3, 4, 5)); 121 List<Integer> list = multimap.get("foo"); 122 assertThat(multimap.get("foo")).has().exactly(1, 2, 3, 4, 5).inOrder(); 123 List<Integer> sublist = list.subList(0, 5); 124 assertThat(sublist).has().exactly(1, 2, 3, 4, 5).inOrder(); 125 126 sublist.clear(); 127 assertTrue(sublist.isEmpty()); 128 multimap.put("foo", 6); 129 130 try { 131 sublist.isEmpty(); 132 fail("Expected ConcurrentModificationException"); 133 } catch (ConcurrentModificationException expected) {} 134 } 135 136 public void testCreateFromMultimap() { 137 Multimap<String, Integer> multimap = create(); 138 multimap.put("foo", 1); 139 multimap.put("foo", 3); 140 multimap.put("bar", 2); 141 ArrayListMultimap<String, Integer> copy 142 = ArrayListMultimap.create(multimap); 143 assertEquals(multimap, copy); 144 } 145 146 public void testCreate() { 147 ArrayListMultimap<String, Integer> multimap 148 = ArrayListMultimap.create(); 149 assertEquals(3, multimap.expectedValuesPerKey); 150 } 151 152 public void testCreateFromSizes() { 153 ArrayListMultimap<String, Integer> multimap 154 = ArrayListMultimap.create(15, 20); 155 assertEquals(20, multimap.expectedValuesPerKey); 156 } 157 158 public void testCreateFromIllegalSizes() { 159 try { 160 ArrayListMultimap.create(15, -2); 161 fail(); 162 } catch (IllegalArgumentException expected) {} 163 164 try { 165 ArrayListMultimap.create(-15, 2); 166 fail(); 167 } catch (IllegalArgumentException expected) {} 168 } 169 170 public void testCreateFromHashMultimap() { 171 Multimap<String, Integer> original = HashMultimap.create(); 172 ArrayListMultimap<String, Integer> multimap 173 = ArrayListMultimap.create(original); 174 assertEquals(3, multimap.expectedValuesPerKey); 175 } 176 177 public void testCreateFromArrayListMultimap() { 178 ArrayListMultimap<String, Integer> original 179 = ArrayListMultimap.create(15, 20); 180 ArrayListMultimap<String, Integer> multimap 181 = ArrayListMultimap.create(original); 182 assertEquals(20, multimap.expectedValuesPerKey); 183 } 184 185 public void testTrimToSize() { 186 ArrayListMultimap<String, Integer> multimap 187 = ArrayListMultimap.create(); 188 multimap.put("foo", 1); 189 multimap.put("foo", 2); 190 multimap.put("bar", 3); 191 multimap.trimToSize(); 192 assertEquals(3, multimap.size()); 193 assertThat(multimap.get("foo")).has().exactly(1, 2).inOrder(); 194 assertThat(multimap.get("bar")).has().item(3); 195 } 196 } 197
