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.comparator;
18  
19  import static org.junit.Assert.assertTrue;
20  
21  import java.util.Collections;
22  
23  import org.apache.commons.functor.BaseFunctorTest;
24  import org.junit.Test;
25  
26  /**
27   * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
28   * @author Rodney Waldhoff
29   */
30  public class TestComparatorFunction extends BaseFunctorTest {
31  
32      // Framework
33      // ------------------------------------------------------------------------
34  
35      protected Object makeFunctor() {
36          return ComparatorFunction.INSTANCE;
37      }
38  
39      // Tests
40      // ------------------------------------------------------------------------
41  
42      @Test
43      public void testEvaluate() {
44          ComparatorFunction<Integer> f = ComparatorFunction.<Integer>instance();
45  
46          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MAX_VALUE),new Integer(Integer.MAX_VALUE)))).intValue() == 0);
47          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MAX_VALUE),new Integer(1)))).intValue() > 0);
48          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MAX_VALUE),new Integer(0)))).intValue() > 0);
49          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MAX_VALUE),new Integer(-1)))).intValue() > 0);
50          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MAX_VALUE),new Integer(Integer.MIN_VALUE)))).intValue() > 0);
51  
52          assertTrue(((Integer)(f.evaluate(new Integer(1),new Integer(Integer.MAX_VALUE)))).intValue() < 0);
53          assertTrue(((Integer)(f.evaluate(new Integer(1),new Integer(1)))).intValue() == 0);
54          assertTrue(((Integer)(f.evaluate(new Integer(1),new Integer(0)))).intValue() > 0);
55          assertTrue(((Integer)(f.evaluate(new Integer(1),new Integer(-1)))).intValue() > 0);
56          assertTrue(((Integer)(f.evaluate(new Integer(1),new Integer(Integer.MIN_VALUE)))).intValue() > 0);
57  
58          assertTrue(((Integer)(f.evaluate(new Integer(0),new Integer(Integer.MAX_VALUE)))).intValue() < 0);
59          assertTrue(((Integer)(f.evaluate(new Integer(0),new Integer(1)))).intValue() < 0);
60          assertTrue(((Integer)(f.evaluate(new Integer(0),new Integer(0)))).intValue() == 0);
61          assertTrue(((Integer)(f.evaluate(new Integer(0),new Integer(-1)))).intValue() > 0);
62          assertTrue(((Integer)(f.evaluate(new Integer(0),new Integer(Integer.MIN_VALUE)))).intValue() > 0);
63  
64          assertTrue(((Integer)(f.evaluate(new Integer(-1),new Integer(Integer.MAX_VALUE)))).intValue() < 0);
65          assertTrue(((Integer)(f.evaluate(new Integer(-1),new Integer(1)))).intValue() < 0);
66          assertTrue(((Integer)(f.evaluate(new Integer(-1),new Integer(0)))).intValue() < 0);
67          assertTrue(((Integer)(f.evaluate(new Integer(-1),new Integer(-1)))).intValue() == 0);
68          assertTrue(((Integer)(f.evaluate(new Integer(-1),new Integer(Integer.MIN_VALUE)))).intValue() > 0);
69  
70          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MIN_VALUE),new Integer(Integer.MAX_VALUE)))).intValue() < 0);
71          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MIN_VALUE),new Integer(1)))).intValue() < 0);
72          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MIN_VALUE),new Integer(0)))).intValue() < 0);
73          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MIN_VALUE),new Integer(-1)))).intValue() < 0);
74          assertTrue(((Integer)(f.evaluate(new Integer(Integer.MIN_VALUE),new Integer(Integer.MIN_VALUE)))).intValue() == 0);
75      }
76  
77      @Test
78      @SuppressWarnings("unchecked")
79      public void testEquals() {
80          ComparatorFunction<Comparable<?>> f = ComparatorFunction.instance();
81          assertObjectsAreEqual(f,f);
82          assertObjectsAreEqual(f,new ComparatorFunction<Comparable<?>>(ComparableComparator.instance()));
83          assertObjectsAreNotEqual(f,new ComparatorFunction(Collections.reverseOrder()));
84      }
85  }