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 21 import com.google.common.annotations.GwtCompatible; 22 23 import junit.framework.TestCase; 24 25 import java.util.Arrays; 26 import java.util.Collection; 27 import java.util.Comparator; 28 import java.util.Iterator; 29 import java.util.Map; 30 import java.util.Set; 31 import java.util.SortedMap; 32 33 /** 34 * Unit tests for {@code TreeMultimap} with natural ordering. 35 * 36 * @author Jared Levy 37 */ 38 @GwtCompatible(emulated = true) 39 public class TreeMultimapNaturalTest extends TestCase { 40 41 protected SetMultimap<String, Integer> create() { 42 return TreeMultimap.create(); 43 } 44 45 /** 46 * Create and populate a {@code TreeMultimap} with the natural ordering of 47 * keys and values. 48 */ 49 private TreeMultimap<String, Integer> createPopulate() { 50 TreeMultimap<String, Integer> multimap = TreeMultimap.create(); 51 multimap.put("google", 2); 52 multimap.put("google", 6); 53 multimap.put("foo", 3); 54 multimap.put("foo", 1); 55 multimap.put("foo", 7); 56 multimap.put("tree", 4); 57 multimap.put("tree", 0); 58 return multimap; 59 } 60 61 public void testToString() { 62 SetMultimap<String, Integer> multimap = create(); 63 multimap.putAll("bar", Arrays.asList(3, 1, 2)); 64 multimap.putAll("foo", Arrays.asList(2, 3, 1, -1, 4)); 65 assertEquals("{bar=[1, 2, 3], foo=[-1, 1, 2, 3, 4]}", 66 multimap.toString()); 67 } 68 69 public void testOrderedGet() { 70 TreeMultimap<String, Integer> multimap = createPopulate(); 71 assertThat(multimap.get("foo")).has().exactly(1, 3, 7).inOrder(); 72 assertThat(multimap.get("google")).has().exactly(2, 6).inOrder(); 73 assertThat(multimap.get("tree")).has().exactly(0, 4).inOrder(); 74 } 75 76 public void testOrderedKeySet() { 77 TreeMultimap<String, Integer> multimap = createPopulate(); 78 assertThat(multimap.keySet()).has().exactly("foo", "google", "tree").inOrder(); 79 } 80 81 public void testOrderedAsMapEntries() { 82 TreeMultimap<String, Integer> multimap = createPopulate(); 83 Iterator<Map.Entry<String, Collection<Integer>>> iterator = 84 multimap.asMap().entrySet().iterator(); 85 Map.Entry<String, Collection<Integer>> entry = iterator.next(); 86 assertEquals("foo", entry.getKey()); 87 assertThat(entry.getValue()).has().exactly(1, 3, 7); 88 entry = iterator.next(); 89 assertEquals("google", entry.getKey()); 90 assertThat(entry.getValue()).has().exactly(2, 6); 91 entry = iterator.next(); 92 assertEquals("tree", entry.getKey()); 93 assertThat(entry.getValue()).has().exactly(0, 4); 94 } 95 96 public void testOrderedEntries() { 97 TreeMultimap<String, Integer> multimap = createPopulate(); 98 assertThat(multimap.entries()).has().exactly( 99 Maps.immutableEntry("foo", 1), 100 Maps.immutableEntry("foo", 3), 101 Maps.immutableEntry("foo", 7), 102 Maps.immutableEntry("google", 2), 103 Maps.immutableEntry("google", 6), 104 Maps.immutableEntry("tree", 0), 105 Maps.immutableEntry("tree", 4)).inOrder(); 106 } 107 108 public void testOrderedValues() { 109 TreeMultimap<String, Integer> multimap = createPopulate(); 110 assertThat(multimap.values()).has().exactly( 111 1, 3, 7, 2, 6, 0, 4).inOrder(); 112 } 113 114 public void testMultimapConstructor() { 115 SetMultimap<String, Integer> multimap = create(); 116 multimap.putAll("bar", Arrays.asList(3, 1, 2)); 117 multimap.putAll("foo", Arrays.asList(2, 3, 1, -1, 4)); 118 TreeMultimap<String, Integer> copy = TreeMultimap.create(multimap); 119 assertEquals(multimap, copy); 120 } 121 122 private static final Comparator<Double> KEY_COMPARATOR = 123 Ordering.natural(); 124 125 private static final Comparator<Double> VALUE_COMPARATOR = 126 Ordering.natural().reverse().nullsFirst(); 127 128 /** 129 * Test that creating one TreeMultimap from another does not copy the 130 * comparators from the source TreeMultimap. 131 */ 132 public void testCreateFromTreeMultimap() { 133 Multimap<Double, Double> tree = TreeMultimap.create(KEY_COMPARATOR, VALUE_COMPARATOR); 134 tree.put(1.0, 2.0); 135 tree.put(2.0, 3.0); 136 tree.put(3.0, 4.0); 137 tree.put(4.0, 5.0); 138 139 TreeMultimap<Double, Double> copyFromTree = TreeMultimap.create(tree); 140 assertEquals(tree, copyFromTree); 141 assertSame(Ordering.natural(), copyFromTree.keyComparator()); 142 assertSame(Ordering.natural(), copyFromTree.valueComparator()); 143 assertSame(Ordering.natural(), copyFromTree.get(1.0).comparator()); 144 } 145 146 /** 147 * Test that creating one TreeMultimap from a non-TreeMultimap 148 * results in natural ordering. 149 */ 150 public void testCreateFromHashMultimap() { 151 Multimap<Double, Double> hash = HashMultimap.create(); 152 hash.put(1.0, 2.0); 153 hash.put(2.0, 3.0); 154 hash.put(3.0, 4.0); 155 hash.put(4.0, 5.0); 156 157 TreeMultimap<Double, Double> copyFromHash = TreeMultimap.create(hash); 158 assertEquals(hash, copyFromHash); 159 assertEquals(Ordering.natural(), copyFromHash.keyComparator()); 160 assertEquals(Ordering.natural(), copyFromHash.valueComparator()); 161 } 162 163 /** 164 * Test that creating one TreeMultimap from a SortedSetMultimap uses natural 165 * ordering. 166 */ 167 public void testCreateFromSortedSetMultimap() { 168 SortedSetMultimap<Double, Double> tree = TreeMultimap.create(KEY_COMPARATOR, VALUE_COMPARATOR); 169 tree.put(1.0, 2.0); 170 tree.put(2.0, 3.0); 171 tree.put(3.0, 4.0); 172 tree.put(4.0, 5.0); 173 174 SortedSetMultimap<Double, Double> sorted = Multimaps.unmodifiableSortedSetMultimap(tree); 175 TreeMultimap<Double, Double> copyFromSorted = TreeMultimap.create(sorted); 176 assertEquals(tree, copyFromSorted); 177 assertSame(Ordering.natural(), copyFromSorted.keyComparator()); 178 assertSame(Ordering.natural(), copyFromSorted.valueComparator()); 179 assertSame(Ordering.natural(), copyFromSorted.get(1.0).comparator()); 180 } 181 182 public void testComparators() { 183 TreeMultimap<String, Integer> multimap = TreeMultimap.create(); 184 assertEquals(Ordering.natural(), multimap.keyComparator()); 185 assertEquals(Ordering.natural(), multimap.valueComparator()); 186 } 187 188 public void testTreeMultimapAsMapSorted() { 189 TreeMultimap<String, Integer> multimap = createPopulate(); 190 SortedMap<String, Collection<Integer>> asMap = multimap.asMap(); 191 assertEquals(Ordering.natural(), asMap.comparator()); 192 assertEquals("foo", asMap.firstKey()); 193 assertEquals("tree", asMap.lastKey()); 194 Set<Integer> fooValues = ImmutableSet.of(1, 3, 7); 195 Set<Integer> googleValues = ImmutableSet.of(2, 6); 196 Set<Integer> treeValues = ImmutableSet.of(4, 0); 197 assertEquals(ImmutableMap.of("google", googleValues, "tree", treeValues), 198 asMap.tailMap("g")); 199 assertEquals(ImmutableMap.of("google", googleValues, "foo", fooValues), 200 asMap.headMap("h")); 201 assertEquals(ImmutableMap.of("google", googleValues), 202 asMap.subMap("g", "h")); 203 } 204 205 public void testTailSetClear() { 206 TreeMultimap<String, Integer> multimap = TreeMultimap.create(); 207 multimap.put("a", 1); 208 multimap.put("a", 11); 209 multimap.put("b", 2); 210 multimap.put("c", 3); 211 multimap.put("d", 4); 212 multimap.put("e", 5); 213 multimap.put("e", 55); 214 215 multimap.keySet().tailSet("d").clear(); 216 assertEquals(ImmutableSet.of("a", "b", "c"), multimap.keySet()); 217 assertEquals(4, multimap.size()); 218 assertEquals(4, multimap.values().size()); 219 assertEquals(4, multimap.keys().size()); 220 } 221 } 222 223
