/*
* 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.iterators;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.Test;
import junit.framework.TestSuite;
import org.apache.commons.collections.ResettableIterator;
/**
* Tests the SingletonIterator to ensure that the next() method will actually
* perform the iteration rather than the hasNext() method.
*
* @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
*
* @author James Strachan
*/
public class TestSingletonIterator2 extends AbstractTestIterator {
private static final Object testValue = "foo";
public static Test suite() {
return new TestSuite(TestSingletonIterator2.class);
}
public TestSingletonIterator2(String testName) {
super(testName);
}
//-----------------------------------------------------------------------
public Iterator makeEmptyIterator() {
SingletonIterator iter = new SingletonIterator(testValue);
iter.next();
iter.remove();
iter.reset();
return iter;
}
public Iterator makeFullIterator() {
return new SingletonIterator(testValue, false);
}
public boolean supportsRemove() {
return false;
}
public boolean supportsEmptyIterator() {
return false;
}
//-----------------------------------------------------------------------
public void testIterator() {
Iterator iter = (Iterator) makeObject();
assertTrue("Iterator has a first item", iter.hasNext());
Object iterValue = iter.next();
assertEquals("Iteration value is correct", testValue, iterValue);
assertTrue("Iterator should now be empty", !iter.hasNext());
try {
iter.next();
} catch (Exception e) {
assertTrue(
"NoSuchElementException must be thrown",
e.getClass().equals((new NoSuchElementException()).getClass()));
}
}
public void testReset() {
ResettableIterator it = (ResettableIterator) makeObject();
assertEquals(true, it.hasNext());
assertEquals(testValue, it.next());
assertEquals(false, it.hasNext());
it.reset();
assertEquals(true, it.hasNext());
assertEquals(testValue, it.next());
assertEquals(false, it.hasNext());
it.reset();
it.reset();
assertEquals(true, it.hasNext());
}
}