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;
18  
19  import static org.junit.Assert.assertEquals;
20  import static org.junit.Assert.assertFalse;
21  import static org.junit.Assert.assertNotSame;
22  import static org.junit.Assert.assertSame;
23  import static org.junit.Assert.assertTrue;
24  
25  import org.apache.commons.functor.BaseFunctorTest;
26  import org.apache.commons.functor.BinaryPredicate;
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 TestIsEqual extends BaseFunctorTest {
34  
35      // Functor Testing Framework
36      // ------------------------------------------------------------------------
37  
38      protected Object makeFunctor() {
39          return new IsEqual<Object, Object>();
40      }
41  
42      // Tests
43      // ------------------------------------------------------------------------
44  
45      @Test
46      public void testTest() throws Exception {
47          IsEqual<Object, Object> p = new IsEqual<Object, Object>();
48          assertTrue("For symmetry, two nulls should be equal", p.test(null, null));
49          assertTrue(p.test("foo", "foo"));
50          assertFalse(p.test(null, "foo"));
51          assertFalse(p.test("foo", null));
52          assertTrue(p.test(new Integer(3), new Integer(3)));
53          assertFalse(p.test(null, new Integer(3)));
54          assertFalse(p.test(new Integer(3), null));
55  
56          assertFalse(p.test(new Integer(3), new Integer(4)));
57          assertFalse(p.test(new Integer(4), new Integer(3)));
58          assertFalse(p.test("3", new Integer(3)));
59          assertFalse(p.test(new Integer(3), "3"));
60      }
61  
62      @Test
63      public void testEquals() throws Exception {
64          BinaryPredicate<Object, Object> f = new IsEqual<Object, Object>();
65          assertEquals(f, f);
66  
67          assertObjectsAreEqual(f, new IsEqual<Object, Object>());
68          assertObjectsAreEqual(f, IsEqual.instance());
69          assertObjectsAreNotEqual(f, Constant.truePredicate());
70      }
71  
72      @Test
73      public void testConstant() throws Exception {
74          assertEquals(IsEqual.instance(), IsEqual.instance());
75          assertNotSame(IsEqual.instance(), IsEqual.instance());
76          assertSame(IsEqual.INSTANCE, IsEqual.INSTANCE);
77      }
78  }