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.google.MultisetFeature; 27 import com.google.common.collect.testing.google.MultisetTestSuiteBuilder; 28 import com.google.common.collect.testing.google.TestStringMultisetGenerator; 29 30 import junit.framework.Test; 31 import junit.framework.TestCase; 32 import junit.framework.TestSuite; 33 34 import java.util.Arrays; 35 import java.util.List; 36 37 /** 38 * Unit test for {@link LinkedHashMultiset}. 39 * 40 * @author Kevin Bourrillion 41 */ 42 @GwtCompatible(emulated = true) 43 public class LinkedHashMultisetTest extends TestCase { 44 45 @GwtIncompatible("suite") suite()46 public static Test suite() { 47 TestSuite suite = new TestSuite(); 48 suite.addTest(MultisetTestSuiteBuilder.using(linkedHashMultisetGenerator()) 49 .named("LinkedHashMultiset") 50 .withFeatures(CollectionSize.ANY, 51 CollectionFeature.KNOWN_ORDER, 52 CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION, 53 CollectionFeature.ALLOWS_NULL_VALUES, 54 CollectionFeature.SERIALIZABLE, 55 CollectionFeature.GENERAL_PURPOSE, 56 MultisetFeature.ENTRIES_ARE_VIEWS) 57 .createTestSuite()); 58 suite.addTestSuite(LinkedHashMultisetTest.class); 59 return suite; 60 } 61 linkedHashMultisetGenerator()62 private static TestStringMultisetGenerator linkedHashMultisetGenerator() { 63 return new TestStringMultisetGenerator() { 64 @Override protected Multiset<String> create(String[] elements) { 65 return LinkedHashMultiset.create(asList(elements)); 66 } 67 68 @Override 69 public List<String> order(List<String> insertionOrder) { 70 List<String> order = Lists.newArrayList(); 71 for (String s : insertionOrder) { 72 int index = order.indexOf(s); 73 if (index == -1) { 74 order.add(s); 75 } else { 76 order.add(index, s); 77 } 78 } 79 return order; 80 } 81 }; 82 } 83 84 public void testCreate() { 85 Multiset<String> multiset = LinkedHashMultiset.create(); 86 multiset.add("foo", 2); 87 multiset.add("bar"); 88 assertEquals(3, multiset.size()); 89 assertEquals(2, multiset.count("foo")); 90 assertEquals("[foo x 2, bar]", multiset.toString()); 91 } 92 93 public void testCreateWithSize() { 94 Multiset<String> multiset = LinkedHashMultiset.create(50); 95 multiset.add("foo", 2); 96 multiset.add("bar"); 97 assertEquals(3, multiset.size()); 98 assertEquals(2, multiset.count("foo")); 99 assertEquals("[foo x 2, bar]", multiset.toString()); 100 } 101 102 public void testCreateFromIterable() { 103 Multiset<String> multiset 104 = LinkedHashMultiset.create(Arrays.asList("foo", "bar", "foo")); 105 assertEquals(3, multiset.size()); 106 assertEquals(2, multiset.count("foo")); 107 assertEquals("[foo x 2, bar]", multiset.toString()); 108 } 109 110 public void testToString() { 111 Multiset<String> ms = LinkedHashMultiset.create(); 112 ms.add("a", 3); 113 ms.add("c", 1); 114 ms.add("b", 2); 115 116 assertEquals("[a x 3, c, b x 2]", ms.toString()); 117 } 118 119 public void testLosesPlaceInLine() throws Exception { 120 Multiset<String> ms = LinkedHashMultiset.create(); 121 ms.add("a"); 122 ms.add("b", 2); 123 ms.add("c"); 124 assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder(); 125 ms.remove("b"); 126 assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder(); 127 ms.add("b"); 128 assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder(); 129 ms.remove("b", 2); 130 ms.add("b"); 131 assertThat(ms.elementSet()).has().exactly("a", "c", "b").inOrder(); 132 } 133 } 134