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/*
* 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.tools.ant.util;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import org.junit.Test;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertEquals;
public class LinkedHashtableTest {
private static final Object K1 = new Object();
private static final Object K2 = new Object();
private static final Object V1 = new Object();
private static final Object V2 = new Object();
private Hashtable h = new LinkedHashtable();
public void testClear() {
h.put(K1, V1);
h.clear();
assertTrue(h.isEmpty());
}
public void testClone() {
h.put(K1, V1);
Hashtable h2 = (Hashtable) h.clone();
assertTrue(h2 instanceof LinkedHashtable);
assertTrue(h2.containsKey(K1));
}
@Test
public void testContainsAndPut() {
h.put(K1, V1);
assertTrue(h.contains(K1));
assertTrue(h.containsKey(K1));
assertTrue(h.containsValue(V1));
assertFalse(h.containsKey(K2));
}
@Test
public void testGet() {
assertNull(h.get(K1));
h.put(K1, V1);
assertSame(V1, h.get(K1));
}
@Test
public void testIsEmpty() {
assertTrue(h.isEmpty());
h.put(K1, V1);
assertFalse(h.isEmpty());
}
@Test
public void testPutReturnValue() {
assertNull(h.put(K1, V1));
assertSame(V1, h.put(K1, V2));
}
@Test
public void testPutAll() {
LinkedHashtable h2 = new LinkedHashtable();
h.put(K1, V1);
h2.putAll(h);
assertTrue(h2.containsKey(K1));
}
@Test
public void testRemove() {
h.put(K1, V1);
assertSame(V1, h.remove(K1));
assertTrue(h.isEmpty());
assertNull(h.remove(K1));
}
@Test
public void testSize() {
assertEquals(0, h.size());
h.put(K1, V1);
assertEquals(1, h.size());
}
@Test
public void testKeys() {
multiSetup();
assertKeys(CollectionUtils.asIterator(h.keys()));
}
@Test
public void testKeySet() {
multiSetup();
assertKeys(h.keySet().iterator());
}
@Test
public void testElements() {
multiSetup();
assertValues(CollectionUtils.asIterator(h.elements()));
}
@Test
public void testValues() {
multiSetup();
assertValues(h.values().iterator());
}
@Test
public void testEntrySet() {
multiSetup();
Iterator i = h.entrySet().iterator();
assertTrue(i.hasNext());
Map.Entry e = (Map.Entry) i.next();
assertSame(K1, e.getKey());
assertSame(V1, e.getValue());
assertTrue(i.hasNext());
e = (Map.Entry) i.next();
assertSame(K2, e.getKey());
assertSame(V2, e.getValue());
assertFalse(i.hasNext());
}
private void multiSetup() {
h.put(K1, V1);
h.put(K2, V2);
}
private static void assertKeys(Iterator i) {
assertTrue(i.hasNext());
assertSame(K1, i.next());
assertTrue(i.hasNext());
assertSame(K2, i.next());
assertFalse(i.hasNext());
}
private static void assertValues(Iterator i) {
assertTrue(i.hasNext());
assertSame(V1, i.next());
assertTrue(i.hasNext());
assertSame(V2, i.next());
assertFalse(i.hasNext());
}
}
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