/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.collections.keyvalue;
import java.util.Map;
import junit.framework.Test;
import junit.framework.TestSuite;
import org.apache.commons.collections.KeyValue;
/**
* Test the DefaultMapEntry class.
*
* @since Commons Collections 3.0
* @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
*
* @author Neil O'Toole
*/
public class TestDefaultMapEntry extends AbstractTestMapEntry {
public TestDefaultMapEntry(String testName) {
super(testName);
}
public static void main(String[] args) {
junit.textui.TestRunner.run(TestDefaultMapEntry.class);
}
public static Test suite() {
return new TestSuite(TestDefaultMapEntry.class);
}
//-----------------------------------------------------------------------
/**
* Make an instance of Map.Entry with the default (null) key and value.
* Subclasses should override this method to return a Map.Entry
* of the type being tested.
*/
public Map.Entry makeMapEntry() {
return new DefaultMapEntry(null, null);
}
/**
* Make an instance of Map.Entry with the specified key and value.
* Subclasses should override this method to return a Map.Entry
* of the type being tested.
*/
public Map.Entry makeMapEntry(Object key, Object value) {
return new DefaultMapEntry(key, value);
}
//-----------------------------------------------------------------------
/**
* Subclasses should override this method.
*
*/
public void testConstructors() {
// 1. test key-value constructor
Map.Entry entry = new DefaultMapEntry(key, value);
assertSame(key, entry.getKey());
assertSame(value, entry.getValue());
// 2. test pair constructor
KeyValue pair = new DefaultKeyValue(key, value);
assertSame(key, pair.getKey());
assertSame(value, pair.getValue());
// 3. test copy constructor
Map.Entry entry2 = new DefaultMapEntry(entry);
assertSame(key, entry2.getKey());
assertSame(value, entry2.getValue());
// test that the objects are independent
entry.setValue(null);
assertSame(value, entry2.getValue());
}
public void testSelfReferenceHandling() {
Map.Entry entry = makeMapEntry();
try {
entry.setValue(entry);
assertSame(entry, entry.getValue());
} catch (Exception e) {
fail("This Map.Entry implementation supports value self-reference.");
}
}
}