259 lines
8.3 KiB
Java
259 lines
8.3 KiB
Java
/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import static com.google.common.truth.Truth.assertThat;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.annotations.GwtIncompatible;
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import com.google.common.collect.testing.features.CollectionFeature;
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import com.google.common.collect.testing.features.CollectionSize;
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import com.google.common.collect.testing.features.MapFeature;
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import com.google.common.collect.testing.google.BiMapTestSuiteBuilder;
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import com.google.common.collect.testing.google.TestStringBiMapGenerator;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import junit.framework.Test;
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import junit.framework.TestCase;
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import junit.framework.TestSuite;
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/**
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* Tests for {@link HashBiMap}.
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*
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* @author Mike Bostock
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*/
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@GwtCompatible(emulated = true)
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public class HashBiMapTest extends TestCase {
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public static final class HashBiMapGenerator extends TestStringBiMapGenerator {
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@Override
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protected BiMap<String, String> create(Entry<String, String>[] entries) {
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BiMap<String, String> result = HashBiMap.create();
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for (Entry<String, String> entry : entries) {
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result.put(entry.getKey(), entry.getValue());
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}
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return result;
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}
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}
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@GwtIncompatible // suite
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public static Test suite() {
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TestSuite suite = new TestSuite();
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suite.addTest(
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BiMapTestSuiteBuilder.using(new HashBiMapGenerator())
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.named("HashBiMap")
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.withFeatures(
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CollectionSize.ANY,
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CollectionFeature.SERIALIZABLE,
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CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
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CollectionFeature.KNOWN_ORDER,
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MapFeature.ALLOWS_NULL_KEYS,
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MapFeature.ALLOWS_NULL_VALUES,
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MapFeature.ALLOWS_ANY_NULL_QUERIES,
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MapFeature.GENERAL_PURPOSE)
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.createTestSuite());
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suite.addTestSuite(HashBiMapTest.class);
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return suite;
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}
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public void testMapConstructor() {
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/* Test with non-empty Map. */
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Map<String, String> map =
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ImmutableMap.of(
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"canada", "dollar",
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"chile", "peso",
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"switzerland", "franc");
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HashBiMap<String, String> bimap = HashBiMap.create(map);
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assertEquals("dollar", bimap.get("canada"));
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assertEquals("canada", bimap.inverse().get("dollar"));
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}
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private static final int N = 1000;
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public void testBashIt() throws Exception {
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BiMap<Integer, Integer> bimap = HashBiMap.create(N);
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BiMap<Integer, Integer> inverse = bimap.inverse();
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for (int i = 0; i < N; i++) {
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assertNull(bimap.put(2 * i, 2 * i + 1));
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}
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for (int i = 0; i < N; i++) {
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assertEquals(2 * i + 1, (int) bimap.get(2 * i));
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}
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for (int i = 0; i < N; i++) {
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assertEquals(2 * i, (int) inverse.get(2 * i + 1));
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}
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for (int i = 0; i < N; i++) {
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int oldValue = bimap.get(2 * i);
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assertEquals(2 * i + 1, (int) bimap.put(2 * i, oldValue - 2));
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}
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for (int i = 0; i < N; i++) {
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assertEquals(2 * i - 1, (int) bimap.get(2 * i));
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}
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for (int i = 0; i < N; i++) {
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assertEquals(2 * i, (int) inverse.get(2 * i - 1));
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}
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Set<Entry<Integer, Integer>> entries = bimap.entrySet();
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for (Entry<Integer, Integer> entry : entries) {
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entry.setValue(entry.getValue() + 2 * N);
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}
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for (int i = 0; i < N; i++) {
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assertEquals(2 * N + 2 * i - 1, (int) bimap.get(2 * i));
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}
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}
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public void testBiMapEntrySetIteratorRemove() {
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BiMap<Integer, String> map = HashBiMap.create();
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map.put(1, "one");
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Set<Entry<Integer, String>> entries = map.entrySet();
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Iterator<Entry<Integer, String>> iterator = entries.iterator();
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Entry<Integer, String> entry = iterator.next();
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entry.setValue("two"); // changes the iterator's current entry value
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assertEquals("two", map.get(1));
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assertEquals(Integer.valueOf(1), map.inverse().get("two"));
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iterator.remove(); // removes the updated entry
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assertTrue(map.isEmpty());
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}
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public void testInsertionOrder() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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assertThat(map.entrySet())
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.containsExactly(
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Maps.immutableEntry("foo", 1),
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Maps.immutableEntry("bar", 2),
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Maps.immutableEntry("quux", 3))
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.inOrder();
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}
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public void testInsertionOrderAfterRemoveFirst() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.remove("foo");
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry("bar", 2), Maps.immutableEntry("quux", 3))
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.inOrder();
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}
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public void testInsertionOrderAfterRemoveMiddle() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.remove("bar");
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry("foo", 1), Maps.immutableEntry("quux", 3))
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.inOrder();
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}
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public void testInsertionOrderAfterRemoveLast() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.remove("quux");
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry("foo", 1), Maps.immutableEntry("bar", 2))
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.inOrder();
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}
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public void testInsertionOrderAfterForcePut() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.forcePut("quux", 1);
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry("bar", 2), Maps.immutableEntry("quux", 1))
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.inOrder();
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}
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public void testInsertionOrderAfterInverseForcePut() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.inverse().forcePut(1, "quux");
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry("bar", 2), Maps.immutableEntry("quux", 1))
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.inOrder();
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}
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public void testInverseInsertionOrderAfterInverse() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("bar", 2);
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map.put("quux", 1);
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assertThat(map.inverse().entrySet())
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.containsExactly(Maps.immutableEntry(2, "bar"), Maps.immutableEntry(1, "quux"))
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.inOrder();
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}
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public void testInverseInsertionOrderAfterInverseForcePut() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.inverse().forcePut(1, "quux");
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assertThat(map.inverse().entrySet())
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.containsExactly(Maps.immutableEntry(2, "bar"), Maps.immutableEntry(1, "quux"))
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.inOrder();
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}
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public void testInverseInsertionOrderAfterInverseForcePutPresentKey() {
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BiMap<String, Integer> map = HashBiMap.create();
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map.put("foo", 1);
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map.put("bar", 2);
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map.put("quux", 3);
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map.put("nab", 4);
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map.inverse().forcePut(4, "bar");
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assertThat(map.entrySet())
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.containsExactly(
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Maps.immutableEntry("foo", 1),
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Maps.immutableEntry("bar", 4),
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Maps.immutableEntry("quux", 3))
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.inOrder();
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}
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public void testInverseEntrySetValueNewKey() {
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BiMap<Integer, String> map = HashBiMap.create();
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map.put(1, "a");
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map.put(2, "b");
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Iterator<Entry<String, Integer>> inverseEntryItr = map.inverse().entrySet().iterator();
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Entry<String, Integer> entry = inverseEntryItr.next();
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entry.setValue(3);
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assertEquals(Maps.immutableEntry("b", 2), inverseEntryItr.next());
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assertFalse(inverseEntryItr.hasNext());
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assertThat(map.entrySet())
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.containsExactly(Maps.immutableEntry(2, "b"), Maps.immutableEntry(3, "a"))
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.inOrder();
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}
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}
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