/*
* Copyright 2001-2004 The Apache Software Foundation
*
* 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 org.apache.commons.collections.iterators;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests the ArrayIterator to ensure that the next() method will actually
* perform the iteration rather than the hasNext() method.
* The code of this test was supplied by Mauricio S. Moura.
*
* @version $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
*
* @author James Strachan
* @author Mauricio S. Moura
* @author Morgan Delagrange
* @author Stephen Colebourne
*/
public class TestArrayIterator extends AbstractTestIterator {
protected String[] testArray = { "One", "Two", "Three" };
public static Test suite() {
return new TestSuite(TestArrayIterator.class);
}
public TestArrayIterator(String testName) {
super(testName);
}
public Iterator makeEmptyIterator() {
return new ArrayIterator(new Object[0]);
}
public Iterator makeFullIterator() {
return new ArrayIterator(testArray);
}
public boolean supportsRemove() {
return false;
}
public void testIterator() {
Iterator iter = (Iterator) makeFullIterator();
for (int i = 0; i < testArray.length; i++) {
Object testValue = testArray[i];
Object iterValue = iter.next();
assertEquals("Iteration value is correct", testValue, iterValue);
}
assertTrue("Iterator should now be empty", !iter.hasNext());
try {
Object testValue = iter.next();
} catch (Exception e) {
assertTrue(
"NoSuchElementException must be thrown",
e.getClass().equals((new NoSuchElementException()).getClass()));
}
}
public void testNullArray() {
try {
Iterator iter = new ArrayIterator(null);
fail("Constructor should throw a NullPointerException when constructed with a null array");
} catch (NullPointerException e) {
// expected
}
ArrayIterator iter = new ArrayIterator();
try {
iter.setArray(null);
fail("setArray(null) should throw a NullPointerException");
} catch (NullPointerException e) {
// expected
}
}
public void testReset() {
ArrayIterator it = (ArrayIterator) makeFullIterator();
it.next();
it.reset();
assertEquals("One", it.next());
}
}