| /******************************************************************************* |
| * Copyright (c) 2009 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.common.utility.tests.internal.iterables; |
| |
| import java.util.AbstractCollection; |
| import java.util.AbstractList; |
| import java.util.Iterator; |
| import java.util.Vector; |
| |
| import junit.framework.TestCase; |
| |
| import org.eclipse.jpt.common.utility.internal.iterables.ChainIterable; |
| import org.eclipse.jpt.common.utility.internal.iterators.ChainIterator; |
| |
| @SuppressWarnings("nls") |
| public class ChainIterableTests extends TestCase { |
| private final static Class<?>[] VECTOR_HIERARCHY = { Vector.class, AbstractList.class, AbstractCollection.class, Object.class }; |
| |
| public ChainIterableTests(String name) { |
| super(name); |
| } |
| |
| |
| public void testNextLink() { |
| int i = 0; |
| for (Class<?> clazz : this.buildIterable()) { |
| assertEquals(VECTOR_HIERARCHY[i++], clazz); |
| } |
| } |
| |
| public void testLinker() { |
| int i = 0; |
| for (Class<?> clazz : new ChainIterable<Class<?>>(Vector.class, this.buildLinker())) { |
| assertEquals(VECTOR_HIERARCHY[i++], clazz); |
| } |
| } |
| |
| public void testException() { |
| Iterable<Class<?>> iterable = new ChainIterable<Class<?>>(Vector.class); |
| Iterator<Class<?>> iterator = iterable.iterator(); |
| boolean exCaught = false; |
| try { |
| Class<?> clazz = iterator.next(); |
| fail("bogus class: " + clazz); |
| } catch (RuntimeException ex) { |
| exCaught = true; |
| } |
| assertTrue(exCaught); |
| } |
| |
| public void testToString() { |
| assertNotNull(this.buildIterable().toString()); |
| } |
| |
| private Iterable<Class<?>> buildIterable() { |
| return this.buildChainIterable(Vector.class); |
| } |
| |
| private Iterable<Class<?>> buildChainIterable(Class<?> startLink) { |
| // chain up the class's hierarchy |
| return new ChainIterable<Class<?>>(startLink) { |
| @Override |
| protected Class<?> nextLink(Class<?> currentLink) { |
| return currentLink.getSuperclass(); |
| } |
| }; |
| } |
| |
| private ChainIterator.Linker<Class<?>> buildLinker() { |
| return new ChainIterator.Linker<Class<?>>() { |
| public Class<?> nextLink(Class<?> currentLink) { |
| return currentLink.getSuperclass(); |
| } |
| }; |
| } |
| |
| } |