/* * 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()); } }