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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.hc.core5.util;
29  
30  import org.junit.Assert;
31  import org.junit.Test;
32  
33  /**
34   * Unit tests for {@link LangUtils}.
35   *
36   */
37  public class TestLangUtils {
38  
39      @Test
40      public void testBasicHash() {
41          final Integer i = Integer.valueOf(1234);
42          final int h1 = LangUtils.hashCode(LangUtils.HASH_SEED, i.hashCode());
43          final int h2 = LangUtils.hashCode(LangUtils.HASH_SEED, i);
44          Assert.assertTrue(h1 == h2);
45      }
46  
47      @Test
48      public void testNullObjectHash() {
49          final int h1 = LangUtils.hashCode(LangUtils.HASH_SEED, null);
50          final int h2 = LangUtils.hashCode(LangUtils.HASH_SEED, 0);
51          Assert.assertTrue(h1 == h2);
52      }
53  
54      @Test
55      public void testBooleanHash() {
56          final int h1 = LangUtils.hashCode(LangUtils.HASH_SEED, true);
57          final int h2 = LangUtils.hashCode(LangUtils.HASH_SEED, false);
58          final int h3 = LangUtils.hashCode(LangUtils.HASH_SEED, true);
59          final int h4 = LangUtils.hashCode(LangUtils.HASH_SEED, false);
60          Assert.assertTrue(h1 != h2);
61          Assert.assertTrue(h1 == h3);
62          Assert.assertTrue(h2 == h4);
63      }
64  
65      @Test
66      public void testBasicEquality() {
67          Assert.assertTrue(LangUtils.equals(null, null));
68          Assert.assertFalse(LangUtils.equals(null, "abc"));
69          Assert.assertFalse(LangUtils.equals("abc", null));
70          Assert.assertTrue(LangUtils.equals("abc", "abc"));
71      }
72  
73      @Test
74      public void testArrayEquals() {
75          Assert.assertFalse(LangUtils.equals(null, new Object[] {}));
76          Assert.assertFalse(LangUtils.equals(new Object[] {}, null));
77          Assert.assertTrue(LangUtils.equals(new Object[] {}, new Object[] {}));
78          Assert.assertFalse(LangUtils.equals(
79                  new Object[] {Integer.valueOf(1), Integer.valueOf(2)},
80                  new Object[] {Integer.valueOf(1)}));
81          Assert.assertFalse(LangUtils.equals(
82                  new Object[] {Integer.valueOf(1), Integer.valueOf(2)},
83                  new Object[] {Integer.valueOf(1), Integer.valueOf(3)}));
84          Assert.assertTrue(LangUtils.equals(
85                  new Object[] {Integer.valueOf(1), Integer.valueOf(2)},
86                  new Object[] {Integer.valueOf(1), Integer.valueOf(2)}));
87      }
88  }