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.Identity;
26  import org.apache.commons.functor.core.LeftIdentity;
27  import org.apache.commons.functor.core.RightIdentity;
28  import org.junit.Test;
29  
30  /**
31   * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
32   * @author Rodney Waldhoff
33   */
34  public class TestUnaryCompositeBinaryFunction extends BaseFunctorTest {
35  
36      // Functor Testing Framework
37      // ------------------------------------------------------------------------
38  
39      protected Object makeFunctor() {
40          return new UnaryCompositeBinaryFunction<Object, Object, Object>(
41              RightIdentity.FUNCTION,
42              Constant.of("left"),
43              Identity.instance());
44      }
45  
46      // Tests
47      // ------------------------------------------------------------------------
48  
49      @Test
50      public void testEvaluate() throws Exception {
51          BinaryFunction<Object, Object, Object> f = new UnaryCompositeBinaryFunction<Object, Object, Object>(
52                  RightIdentity.FUNCTION,
53                  Constant.of("K"),
54                  Identity.instance());
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 testEquals() throws Exception {
62          BinaryFunction<Object, Object, Object> f = new UnaryCompositeBinaryFunction<Object, Object, Object>(
63                  LeftIdentity.FUNCTION,
64                  Constant.of("left"),
65                  Constant.of("right"));
66          assertEquals(f,f);
67          assertObjectsAreEqual(f,new UnaryCompositeBinaryFunction<Object, Object, Object>(
68                  LeftIdentity.FUNCTION,
69                  Constant.of("left"),
70                  Constant.of("right")));
71          assertObjectsAreNotEqual(f,new UnaryCompositeBinaryFunction<Object, Object, Object>(
72                  RightIdentity.FUNCTION,
73                  Constant.of("left"),
74                  Constant.of("right")));
75          assertObjectsAreNotEqual(f,new UnaryCompositeBinaryFunction<Object, Object, Object>(
76                  LeftIdentity.FUNCTION,
77                  Identity.instance(),
78              Constant.of("right")));
79          assertObjectsAreNotEqual(f,new UnaryCompositeBinaryFunction<Object, Object, Object>(
80                  LeftIdentity.FUNCTION,
81                  Constant.of("left"),
82                  Identity.instance()));
83      }
84  
85  }