001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.commons.functor.adapter;
018
019 import static org.junit.Assert.assertEquals;
020 import static org.junit.Assert.assertNotNull;
021 import static org.junit.Assert.assertNull;
022
023 import org.apache.commons.functor.BaseFunctorTest;
024 import org.apache.commons.functor.BinaryFunction;
025 import org.apache.commons.functor.core.Constant;
026 import org.apache.commons.functor.core.Identity;
027 import org.junit.Test;
028
029 /**
030 * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
031 * @author Rodney Waldhoff
032 */
033 public class TestIgnoreRightFunction extends BaseFunctorTest {
034
035 // Functor Testing Framework
036 // ------------------------------------------------------------------------
037
038 protected Object makeFunctor() {
039 return new IgnoreRightFunction<Object, Object, Object>(Constant.of("xyzzy"));
040 }
041
042 // Tests
043 // ------------------------------------------------------------------------
044
045 @Test
046 public void testEvaluate() throws Exception {
047 BinaryFunction<String, String, String> f = new IgnoreRightFunction<String, String, String>(new Identity<String>());
048 assertNull(f.evaluate(null,null));
049 assertNull(f.evaluate(null,"xyzzy"));
050 assertEquals("xyzzy",f.evaluate("xyzzy",null));
051 assertEquals("xyzzy",f.evaluate("xyzzy","abc"));
052 }
053
054 @Test
055 public void testEquals() throws Exception {
056 BinaryFunction<String, String, String> f = new IgnoreRightFunction<String, String, String>(Constant.of("xyzzy"));
057 assertEquals(f,f);
058 assertObjectsAreEqual(f,new IgnoreRightFunction<String, String, String>(Constant.of("xyzzy")));
059 assertObjectsAreNotEqual(f,Constant.of("x"));
060 assertObjectsAreNotEqual(f,new IgnoreRightFunction<String, String, String>(Constant.<String>of(null)));
061 assertObjectsAreNotEqual(f,Constant.of(null));
062 }
063
064 @Test
065 public void testAdaptNull() throws Exception {
066 assertNull(IgnoreRightFunction.adapt(null));
067 }
068
069 @Test
070 public void testAdapt() throws Exception {
071 assertNotNull(IgnoreRightFunction.adapt(Constant.of("xyzzy")));
072 }
073 }