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The source code/* * 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; 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: 1.1 $ $Date: 2004/04/09 14:38:47 $ * * @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()); } } |
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