| /* |
| * Copyright (C) 2007 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.collect.testing.google.TestStringBiMapGenerator; |
| |
| import junit.framework.TestCase; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| |
| /** |
| * Tests for {@link HashBiMap}. |
| * |
| * @author Mike Bostock |
| */ |
| @GwtCompatible(emulated = true) |
| public class HashBiMapTest extends TestCase { |
| |
| public static final class HashBiMapGenerator extends TestStringBiMapGenerator { |
| @Override |
| protected BiMap<String, String> create(Entry<String, String>[] entries) { |
| BiMap<String, String> result = HashBiMap.create(); |
| for (Entry<String, String> entry : entries) { |
| result.put(entry.getKey(), entry.getValue()); |
| } |
| return result; |
| } |
| } |
| |
| public void testMapConstructor() { |
| /* Test with non-empty Map. */ |
| Map<String, String> map = ImmutableMap.of( |
| "canada", "dollar", |
| "chile", "peso", |
| "switzerland", "franc"); |
| HashBiMap<String, String> bimap = HashBiMap.create(map); |
| assertEquals("dollar", bimap.get("canada")); |
| assertEquals("canada", bimap.inverse().get("dollar")); |
| } |
| |
| private static final int N = 1000; |
| |
| public void testBashIt() throws Exception { |
| BiMap<Integer, Integer> bimap = HashBiMap.create(N); |
| BiMap<Integer, Integer> inverse = bimap.inverse(); |
| |
| for (int i = 0; i < N; i++) { |
| assertNull(bimap.put(2 * i, 2 * i + 1)); |
| } |
| for (int i = 0; i < N; i++) { |
| assertEquals(2 * i + 1, (int) bimap.get(2 * i)); |
| } |
| for (int i = 0; i < N; i++) { |
| assertEquals(2 * i, (int) inverse.get(2 * i + 1)); |
| } |
| for (int i = 0; i < N; i++) { |
| int oldValue = bimap.get(2 * i); |
| assertEquals(2 * i + 1, (int) bimap.put(2 * i, oldValue - 2)); |
| } |
| for (int i = 0; i < N; i++) { |
| assertEquals(2 * i - 1, (int) bimap.get(2 * i)); |
| } |
| for (int i = 0; i < N; i++) { |
| assertEquals(2 * i, (int) inverse.get(2 * i - 1)); |
| } |
| Set<Entry<Integer, Integer>> entries = bimap.entrySet(); |
| for (Entry<Integer, Integer> entry : entries) { |
| entry.setValue(entry.getValue() + 2 * N); |
| } |
| for (int i = 0; i < N; i++) { |
| assertEquals(2 * N + 2 * i - 1, (int) bimap.get(2 * i)); |
| } |
| } |
| |
| public void testBiMapEntrySetIteratorRemove() { |
| BiMap<Integer, String> map = HashBiMap.create(); |
| map.put(1, "one"); |
| Set<Map.Entry<Integer, String>> entries = map.entrySet(); |
| Iterator<Map.Entry<Integer, String>> iterator = entries.iterator(); |
| Map.Entry<Integer, String> entry = iterator.next(); |
| entry.setValue("two"); // changes the iterator's current entry value |
| assertEquals("two", map.get(1)); |
| assertEquals(Integer.valueOf(1), map.inverse().get("two")); |
| iterator.remove(); // removes the updated entry |
| assertTrue(map.isEmpty()); |
| } |
| } |
| |