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/*
* Copyright (C) 2008 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 java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import junit.framework.TestCase;
/**
* Tests for {@link ForwardingConcurrentMap}.
*
* @author Jared Levy
*/
public class ForwardingConcurrentMapTest extends TestCase {
private static class TestMap extends ForwardingConcurrentMap<String, Integer> {
final ConcurrentMap<String, Integer> delegate = new ConcurrentHashMap<>();
@Override
protected ConcurrentMap<String, Integer> delegate() {
return delegate;
}
}
public void testPutIfAbsent() {
TestMap map = new TestMap();
map.put("foo", 1);
assertEquals(Integer.valueOf(1), map.putIfAbsent("foo", 2));
assertEquals(Integer.valueOf(1), map.get("foo"));
assertNull(map.putIfAbsent("bar", 3));
assertEquals(Integer.valueOf(3), map.get("bar"));
}
public void testRemove() {
TestMap map = new TestMap();
map.put("foo", 1);
assertFalse(map.remove("foo", 2));
assertFalse(map.remove("bar", 1));
assertEquals(Integer.valueOf(1), map.get("foo"));
assertTrue(map.remove("foo", 1));
assertTrue(map.isEmpty());
}
public void testReplace() {
TestMap map = new TestMap();
map.put("foo", 1);
assertEquals(Integer.valueOf(1), map.replace("foo", 2));
assertNull(map.replace("bar", 3));
assertEquals(Integer.valueOf(2), map.get("foo"));
assertFalse(map.containsKey("bar"));
}
public void testReplaceConditional() {
TestMap map = new TestMap();
map.put("foo", 1);
assertFalse(map.replace("foo", 2, 3));
assertFalse(map.replace("bar", 1, 2));
assertEquals(Integer.valueOf(1), map.get("foo"));
assertFalse(map.containsKey("bar"));
assertTrue(map.replace("foo", 1, 4));
assertEquals(Integer.valueOf(4), map.get("foo"));
}
}
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