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 import java.util.ConcurrentModificationException; 30 import java.util.List; 31 import java.util.Map.Entry; 32 import java.util.RandomAccess; 33 import junit.framework.Test; 34 import junit.framework.TestCase; 35 import junit.framework.TestSuite; 36 37 /** 38 * Unit tests for {@code ArrayListMultimap}. 39 * 40 * @author Jared Levy 41 */ 42 @GwtCompatible(emulated = true) 43 public class ArrayListMultimapTest extends TestCase { 44 45 @GwtIncompatible // suite suite()46 public static Test suite() { 47 TestSuite suite = new TestSuite(); 48 suite.addTest( 49 ListMultimapTestSuiteBuilder.using( 50 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 create()75 protected ListMultimap<String, Integer> create() { 76 return ArrayListMultimap.create(); 77 } 78 79 /** Confirm that get() returns a List implementing RandomAccess. */ testGetRandomAccess()80 public void testGetRandomAccess() { 81 Multimap<String, Integer> multimap = create(); 82 multimap.put("foo", 1); 83 multimap.put("foo", 3); 84 assertTrue(multimap.get("foo") instanceof RandomAccess); 85 assertTrue(multimap.get("bar") instanceof RandomAccess); 86 } 87 88 /** Confirm that removeAll() returns a List implementing RandomAccess. */ testRemoveAllRandomAccess()89 public void testRemoveAllRandomAccess() { 90 Multimap<String, Integer> multimap = create(); 91 multimap.put("foo", 1); 92 multimap.put("foo", 3); 93 assertTrue(multimap.removeAll("foo") instanceof RandomAccess); 94 assertTrue(multimap.removeAll("bar") instanceof RandomAccess); 95 } 96 97 /** Confirm that replaceValues() returns a List implementing RandomAccess. */ testReplaceValuesRandomAccess()98 public void testReplaceValuesRandomAccess() { 99 Multimap<String, Integer> multimap = create(); 100 multimap.put("foo", 1); 101 multimap.put("foo", 3); 102 assertTrue(multimap.replaceValues("foo", asList(2, 4)) instanceof RandomAccess); 103 assertTrue(multimap.replaceValues("bar", asList(2, 4)) instanceof RandomAccess); 104 } 105 106 /** Test throwing ConcurrentModificationException when a sublist's ancestor's delegate changes. */ testSublistConcurrentModificationException()107 public void testSublistConcurrentModificationException() { 108 ListMultimap<String, Integer> multimap = create(); 109 multimap.putAll("foo", asList(1, 2, 3, 4, 5)); 110 List<Integer> list = multimap.get("foo"); 111 assertThat(multimap.get("foo")).containsExactly(1, 2, 3, 4, 5).inOrder(); 112 List<Integer> sublist = list.subList(0, 5); 113 assertThat(sublist).containsExactly(1, 2, 3, 4, 5).inOrder(); 114 115 sublist.clear(); 116 assertTrue(sublist.isEmpty()); 117 multimap.put("foo", 6); 118 119 try { 120 sublist.isEmpty(); 121 fail("Expected ConcurrentModificationException"); 122 } catch (ConcurrentModificationException expected) { 123 } 124 } 125 testCreateFromMultimap()126 public void testCreateFromMultimap() { 127 Multimap<String, Integer> multimap = create(); 128 multimap.put("foo", 1); 129 multimap.put("foo", 3); 130 multimap.put("bar", 2); 131 ArrayListMultimap<String, Integer> copy = ArrayListMultimap.create(multimap); 132 assertEquals(multimap, copy); 133 } 134 testCreate()135 public void testCreate() { 136 ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(); 137 assertEquals(3, multimap.expectedValuesPerKey); 138 } 139 testCreateFromSizes()140 public void testCreateFromSizes() { 141 ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(15, 20); 142 assertEquals(20, multimap.expectedValuesPerKey); 143 } 144 testCreateFromIllegalSizes()145 public void testCreateFromIllegalSizes() { 146 try { 147 ArrayListMultimap.create(15, -2); 148 fail(); 149 } catch (IllegalArgumentException expected) { 150 } 151 152 try { 153 ArrayListMultimap.create(-15, 2); 154 fail(); 155 } catch (IllegalArgumentException expected) { 156 } 157 } 158 testCreateFromHashMultimap()159 public void testCreateFromHashMultimap() { 160 Multimap<String, Integer> original = HashMultimap.create(); 161 ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(original); 162 assertEquals(3, multimap.expectedValuesPerKey); 163 } 164 testCreateFromArrayListMultimap()165 public void testCreateFromArrayListMultimap() { 166 ArrayListMultimap<String, Integer> original = ArrayListMultimap.create(15, 20); 167 ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(original); 168 assertEquals(20, multimap.expectedValuesPerKey); 169 } 170 testTrimToSize()171 public void testTrimToSize() { 172 ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(); 173 multimap.put("foo", 1); 174 multimap.put("foo", 2); 175 multimap.put("bar", 3); 176 multimap.trimToSize(); 177 assertEquals(3, multimap.size()); 178 assertThat(multimap.get("foo")).containsExactly(1, 2).inOrder(); 179 assertThat(multimap.get("bar")).contains(3); 180 } 181 } 182