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.core.composite;
18  
19  import static org.junit.Assert.assertEquals;
20  import static org.junit.Assert.assertNull;
21  
22  import org.apache.commons.functor.BaseFunctorTest;
23  import org.apache.commons.functor.BinaryFunction;
24  import org.apache.commons.functor.core.Constant;
25  import org.apache.commons.functor.core.LeftIdentity;
26  import org.apache.commons.functor.core.RightIdentity;
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 TestBinaryCompositeBinaryFunction extends BaseFunctorTest {
34  
35      // Functor Testing Framework
36      // ------------------------------------------------------------------------
37  
38      protected Object makeFunctor() {
39          return new BinaryCompositeBinaryFunction<Object, Object, Object>(
40              RightIdentity.FUNCTION,
41              Constant.of("left"),
42              RightIdentity.FUNCTION);
43      }
44  
45      // Tests
46      // ------------------------------------------------------------------------
47  
48      @Test
49      @SuppressWarnings("unchecked")
50      public void testEvaluateRaw() throws Exception {
51          BinaryFunction f = new BinaryCompositeBinaryFunction(
52                  RightIdentity.FUNCTION,
53                  Constant.of("K"),
54                  RightIdentity.FUNCTION);
55          assertEquals("right",f.evaluate("left","right"));
56          assertNull("right",f.evaluate("left",null));
57          assertEquals("right",f.evaluate(null,"right"));
58      }
59  
60      @Test
61      public void testEvaluate() throws Exception {
62          BinaryFunction<String, String, String> f = new BinaryCompositeBinaryFunction<String, String, String>(
63                  RightIdentity.<String, String>function(),
64                  Constant.of("K"),
65                  RightIdentity.<String, String>function());
66          assertEquals("right",f.evaluate("left","right"));
67          assertNull("right",f.evaluate("left",null));
68          assertEquals("right",f.evaluate(null,"right"));
69      }
70      
71      @Test
72      public void testEvaluateObject() throws Exception {
73          BinaryFunction<Object, Object, Object> f = new BinaryCompositeBinaryFunction<Object, Object, Object>(
74                  RightIdentity.FUNCTION,
75                  Constant.of("K"),
76                  RightIdentity.FUNCTION);
77          assertEquals("right",f.evaluate("left","right"));
78          assertNull("right",f.evaluate("left",null));
79          assertEquals("right",f.evaluate(null,"right"));
80      }
81  
82      @Test
83      public void testEquals() throws Exception {
84          BinaryFunction<Object, Object, Object> f = new BinaryCompositeBinaryFunction<Object, Object, Object>(
85              LeftIdentity.FUNCTION,
86              Constant.of("left"),
87              Constant.of("right"));
88          assertEquals(f,f);
89          assertObjectsAreEqual(f,new BinaryCompositeBinaryFunction<Object, Object, Object>(
90                  LeftIdentity.FUNCTION,
91                  Constant.of("left"),
92              Constant.of("right")));
93          assertObjectsAreNotEqual(f,new BinaryCompositeBinaryFunction<Object, Object, Object>(
94              RightIdentity.FUNCTION,
95              Constant.of("left"),
96              Constant.of("right")));
97          assertObjectsAreNotEqual(f,new BinaryCompositeBinaryFunction<Object, Object, Object>(
98              RightIdentity.FUNCTION,
99              RightIdentity.FUNCTION,
100             Constant.of("right")));
101         assertObjectsAreNotEqual(f,new BinaryCompositeBinaryFunction<Object, Object, Object>(
102             LeftIdentity.FUNCTION,
103             Constant.of("left"),
104             RightIdentity.FUNCTION));
105     }
106 
107 }