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/*
* 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.annotations.GwtIncompatible;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import com.google.common.collect.testing.google.BiMapTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringBiMapGenerator;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
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;
}
}
@GwtIncompatible("suite")
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTest(BiMapTestSuiteBuilder.using(new HashBiMapGenerator())
.named("HashBiMap")
.withFeatures(CollectionSize.ANY,
CollectionFeature.SERIALIZABLE,
MapFeature.ALLOWS_NULL_KEYS,
MapFeature.ALLOWS_NULL_VALUES,
MapFeature.GENERAL_PURPOSE)
.createTestSuite());
suite.addTestSuite(HashBiMapTest.class);
return suite;
}
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());
}
}
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