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.assertFalse;
21  import static org.junit.Assert.assertTrue;
22  import static org.junit.Assert.fail;
23  
24  import org.apache.commons.functor.BaseFunctorTest;
25  import org.apache.commons.functor.core.Constant;
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 TestCompositeUnaryPredicate extends BaseFunctorTest {
33  
34      // Functor Testing Framework
35      // ------------------------------------------------------------------------
36  
37      protected Object makeFunctor() {
38          return Composite.predicate(Constant.TRUE);
39      }
40  
41      // Tests
42      // ------------------------------------------------------------------------
43  
44      @Test
45      public void testTest() throws Exception {
46          assertTrue(Composite.predicate(Constant.TRUE).test(null));
47          assertTrue(Composite.predicate(Constant.TRUE, Constant.of(3)).test("xyzzy"));
48          assertFalse(Composite.predicate(Constant.FALSE, Constant.of(4)).test("xyzzy"));
49      }
50  
51      @Test
52      @SuppressWarnings("unchecked")
53      public void testNullNotAllowed() throws Exception {
54          try {
55              new CompositeUnaryPredicate(null);
56              fail("Expected IllegalArgumentException");
57          } catch(IllegalArgumentException e) {
58              // expected
59          }
60          try {
61              Composite.function(Constant.TRUE, null);
62              fail("Expected IllegalArgumentException");
63          } catch(IllegalArgumentException e) {
64              // expected
65          }
66      }
67  
68      @Test
69      public void testOf() throws Exception {
70          CompositeUnaryPredicate<Object> f = new CompositeUnaryPredicate<Object>(Constant.TRUE);
71          assertTrue(f.test(null));
72          for (int i=0;i<10;i++) {
73              f = f.of(Constant.FALSE);
74              assertTrue(f.test(null));
75          }
76      }
77  
78      @Test
79      public void testEquals() throws Exception {
80          CompositeUnaryPredicate<Object> f = new CompositeUnaryPredicate<Object>(Constant.TRUE);
81          assertEquals(f,f);
82          CompositeUnaryPredicate<Object> g = new CompositeUnaryPredicate<Object>(Constant.TRUE);
83          assertObjectsAreEqual(f,g);
84  
85          for (int i=0;i<3;i++) {
86              f = f.of(Constant.of("x"));
87              assertObjectsAreNotEqual(f,g);
88              g = g.of(Constant.of("x"));
89              assertObjectsAreEqual(f,g);
90              f = f.of(Constant.of("y")).of(Constant.of("z"));
91              assertObjectsAreNotEqual(f,g);
92              g = g.of(Constant.of("y")).of(Constant.of("z"));
93              assertObjectsAreEqual(f,g);
94          }
95  
96          assertObjectsAreNotEqual(f,Constant.FALSE);
97      }
98  
99  }