ArrayUtilsTest.java revision 94c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.util;
18
19import junit.framework.TestCase;
20
21/**
22 * Tests for {@link ArrayUtils}
23 */
24public class ArrayUtilsTest extends TestCase {
25    public void testContains() throws Exception {
26        final Object A = new Object();
27        final Object B = new Object();
28        final Object C = new Object();
29        final Object D = new Object();
30
31        assertTrue(ArrayUtils.contains(new Object[] { A, B, C }, A));
32        assertTrue(ArrayUtils.contains(new Object[] { A, B, C }, B));
33        assertTrue(ArrayUtils.contains(new Object[] { A, B, C }, C));
34        assertTrue(ArrayUtils.contains(new Object[] { A, null, C }, null));
35
36        assertFalse(ArrayUtils.contains(new Object[] { A, B, C }, null));
37        assertFalse(ArrayUtils.contains(new Object[] { }, null));
38        assertFalse(ArrayUtils.contains(new Object[] { null }, A));
39    }
40
41    public void testIndexOf() throws Exception {
42        final Object A = new Object();
43        final Object B = new Object();
44        final Object C = new Object();
45        final Object D = new Object();
46
47        assertEquals(0, ArrayUtils.indexOf(new Object[] { A, B, C }, A));
48        assertEquals(1, ArrayUtils.indexOf(new Object[] { A, B, C }, B));
49        assertEquals(2, ArrayUtils.indexOf(new Object[] { A, B, C }, C));
50        assertEquals(-1, ArrayUtils.indexOf(new Object[] { A, B, C }, D));
51
52        assertEquals(-1, ArrayUtils.indexOf(new Object[] { A, B, C }, null));
53        assertEquals(-1, ArrayUtils.indexOf(new Object[] { }, A));
54        assertEquals(-1, ArrayUtils.indexOf(new Object[] { }, null));
55
56        assertEquals(0, ArrayUtils.indexOf(new Object[] { null, null }, null));
57        assertEquals(1, ArrayUtils.indexOf(new Object[] { A, null, B }, null));
58        assertEquals(2, ArrayUtils.indexOf(new Object[] { A, null, B }, B));
59    }
60
61    public void testContainsAll() throws Exception {
62        final Object A = new Object();
63        final Object B = new Object();
64        final Object C = new Object();
65
66        assertTrue(ArrayUtils.containsAll(new Object[] { C, B, A }, new Object[] { A, B, C }));
67        assertTrue(ArrayUtils.containsAll(new Object[] { A, B }, new Object[] { A }));
68        assertTrue(ArrayUtils.containsAll(new Object[] { A }, new Object[] { A }));
69        assertTrue(ArrayUtils.containsAll(new Object[] { A }, new Object[] { }));
70        assertTrue(ArrayUtils.containsAll(new Object[] { }, new Object[] { }));
71        assertTrue(ArrayUtils.containsAll(new Object[] { null }, new Object[] { }));
72        assertTrue(ArrayUtils.containsAll(new Object[] { null }, new Object[] { null }));
73        assertTrue(ArrayUtils.containsAll(new Object[] { A, null, C }, new Object[] { C, null }));
74
75        assertFalse(ArrayUtils.containsAll(new Object[] { }, new Object[] { A }));
76        assertFalse(ArrayUtils.containsAll(new Object[] { B }, new Object[] { A }));
77        assertFalse(ArrayUtils.containsAll(new Object[] { }, new Object[] { null }));
78        assertFalse(ArrayUtils.containsAll(new Object[] { A }, new Object[] { null }));
79    }
80}
81