1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.functor.adapter;
18  
19  import static org.junit.Assert.assertEquals;
20  import static org.junit.Assert.assertNotNull;
21  import static org.junit.Assert.assertNull;
22  
23  import org.apache.commons.functor.BaseFunctorTest;
24  import org.apache.commons.functor.BinaryFunction;
25  import org.apache.commons.functor.core.Constant;
26  import org.apache.commons.functor.core.Identity;
27  import org.junit.Test;
28  
29  /**
30   * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
31   * @author Rodney Waldhoff
32   */
33  public class TestIgnoreRightFunction extends BaseFunctorTest {
34  
35      // Functor Testing Framework
36      // ------------------------------------------------------------------------
37  
38      protected Object makeFunctor() {
39          return new IgnoreRightFunction<Object, Object, Object>(Constant.of("xyzzy"));
40      }
41  
42      // Tests
43      // ------------------------------------------------------------------------
44  
45      @Test
46      public void testEvaluate() throws Exception {
47          BinaryFunction<String, String, String> f = new IgnoreRightFunction<String, String, String>(new Identity<String>());
48          assertNull(f.evaluate(null,null));
49          assertNull(f.evaluate(null,"xyzzy"));
50          assertEquals("xyzzy",f.evaluate("xyzzy",null));
51          assertEquals("xyzzy",f.evaluate("xyzzy","abc"));
52      }
53  
54      @Test
55      public void testEquals() throws Exception {
56          BinaryFunction<String, String, String> f = new IgnoreRightFunction<String, String, String>(Constant.of("xyzzy"));
57          assertEquals(f,f);
58          assertObjectsAreEqual(f,new IgnoreRightFunction<String, String, String>(Constant.of("xyzzy")));
59          assertObjectsAreNotEqual(f,Constant.of("x"));
60          assertObjectsAreNotEqual(f,new IgnoreRightFunction<String, String, String>(Constant.<String>of(null)));
61          assertObjectsAreNotEqual(f,Constant.of(null));
62      }
63  
64      @Test
65      public void testAdaptNull() throws Exception {
66          assertNull(IgnoreRightFunction.adapt(null));
67      }
68  
69      @Test
70      public void testAdapt() throws Exception {
71          assertNotNull(IgnoreRightFunction.adapt(Constant.of("xyzzy")));
72      }
73  }