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.assertNotNull;
21  import static org.junit.Assert.assertNull;
22  
23  import org.apache.commons.functor.BaseFunctorTest;
24  import org.apache.commons.functor.BinaryProcedure;
25  import org.apache.commons.functor.core.NoOp;
26  import org.junit.Test;
27  
28  /**
29   * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
30   * @author Rodney Waldhoff
31   */
32  public class TestTransposedProcedure extends BaseFunctorTest {
33  
34      // Functor Testing Framework
35      // ------------------------------------------------------------------------
36  
37      protected Object makeFunctor() {
38          return new TransposedProcedure<Object, Object>(NoOp.INSTANCE);
39      }
40  
41      // Tests
42      // ------------------------------------------------------------------------
43  
44      @Test
45      public void testEvaluate() throws Exception {
46          LeftNotNullCounter counter = new LeftNotNullCounter();
47          BinaryProcedure<Object, Object> p = new TransposedProcedure<Object, Object>(counter);
48          assertEquals(0,counter.count);
49          p.run(null,"not null");
50          assertEquals(1,counter.count);
51          p.run("not null",null);
52          assertEquals(1,counter.count);
53      }
54  
55      @Test
56      public void testEquals() throws Exception {
57          BinaryProcedure<Object, Object> p = new TransposedProcedure<Object, Object>(NoOp.INSTANCE);
58          assertEquals(p,p);
59          assertObjectsAreEqual(p,new TransposedProcedure<Object, Object>(NoOp.INSTANCE));
60          assertObjectsAreEqual(p,TransposedProcedure.transpose(NoOp.INSTANCE));
61          assertObjectsAreNotEqual(p,new TransposedProcedure<Object, Object>(new TransposedProcedure<Object, Object>(NoOp.INSTANCE)));
62          assertObjectsAreNotEqual(p,NoOp.INSTANCE);
63      }
64  
65      @Test
66      public void testTransposeNull() throws Exception {
67          assertNull(TransposedProcedure.transpose(null));
68      }
69  
70      @Test
71      public void testTranspose() throws Exception {
72          assertNotNull(TransposedProcedure.transpose(NoOp.INSTANCE));
73      }
74  
75      // Classes
76      // ------------------------------------------------------------------------
77  
78      static class LeftNotNullCounter implements BinaryProcedure<Object, Object> {
79          public void run(Object a, Object b) {
80              if (null != a) {
81                  count++;
82              }
83          }
84          public int count = 0;
85      }
86  
87  }