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 import java.util.Arrays; 30 import java.util.List; 31 import junit.framework.Test; 32 import junit.framework.TestCase; 33 import junit.framework.TestSuite; 34 35 /** 36 * Unit test for {@link LinkedHashMultiset}. 37 * 38 * @author Kevin Bourrillion 39 */ 40 @GwtCompatible(emulated = true) 41 public class LinkedHashMultisetTest extends TestCase { 42 43 @GwtIncompatible // suite suite()44 public static Test suite() { 45 TestSuite suite = new TestSuite(); 46 suite.addTest( 47 MultisetTestSuiteBuilder.using(linkedHashMultisetGenerator()) 48 .named("LinkedHashMultiset") 49 .withFeatures( 50 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 65 protected Multiset<String> create(String[] elements) { 66 return LinkedHashMultiset.create(asList(elements)); 67 } 68 69 @Override 70 public List<String> order(List<String> insertionOrder) { 71 List<String> order = Lists.newArrayList(); 72 for (String s : insertionOrder) { 73 int index = order.indexOf(s); 74 if (index == -1) { 75 order.add(s); 76 } else { 77 order.add(index, s); 78 } 79 } 80 return order; 81 } 82 }; 83 } 84 85 public void testCreate() { 86 Multiset<String> multiset = LinkedHashMultiset.create(); 87 multiset.add("foo", 2); 88 multiset.add("bar"); 89 assertEquals(3, multiset.size()); 90 assertEquals(2, multiset.count("foo")); 91 assertEquals("[foo x 2, bar]", multiset.toString()); 92 } 93 94 public void testCreateWithSize() { 95 Multiset<String> multiset = LinkedHashMultiset.create(50); 96 multiset.add("foo", 2); 97 multiset.add("bar"); 98 assertEquals(3, multiset.size()); 99 assertEquals(2, multiset.count("foo")); 100 assertEquals("[foo x 2, bar]", multiset.toString()); 101 } 102 103 public void testCreateFromIterable() { 104 Multiset<String> multiset = 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()).containsExactly("a", "b", "c").inOrder(); 125 ms.remove("b"); 126 assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder(); 127 ms.add("b"); 128 assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder(); 129 ms.remove("b", 2); 130 ms.add("b"); 131 assertThat(ms.elementSet()).containsExactly("a", "c", "b").inOrder(); 132 } 133 } 134