1/*
2 * Copyright (C) 2007 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 com.android.internal.util.CharSequences;
20import static com.android.internal.util.CharSequences.forAsciiBytes;
21import junit.framework.TestCase;
22import android.test.suitebuilder.annotation.SmallTest;
23
24public class CharSequencesTest extends TestCase {
25
26    @SmallTest
27    public void testCharSequences() {
28        String s = "Crazy Bob";
29        byte[] bytes = s.getBytes();
30
31        String copy = toString(forAsciiBytes(bytes));
32        assertTrue(s.equals(copy));
33
34        copy = toString(forAsciiBytes(bytes, 0, s.length()));
35        assertTrue(s.equals(copy));
36
37        String crazy = toString(forAsciiBytes(bytes, 0, 5));
38        assertTrue("Crazy".equals(crazy));
39
40        String a = toString(forAsciiBytes(bytes, 0, 3).subSequence(2, 3));
41        assertTrue("a".equals(a));
42
43        String empty = toString(forAsciiBytes(bytes, 0, 3).subSequence(3, 3));
44        assertTrue("".equals(empty));
45
46        assertTrue(CharSequences.equals("bob", "bob"));
47        assertFalse(CharSequences.equals("b", "bob"));
48        assertFalse(CharSequences.equals("", "bob"));
49    }
50
51    /**
52     * Converts a CharSequence to a string the slow way. Useful for testing
53     * a CharSequence implementation.
54     */
55    static String toString(CharSequence charSequence) {
56        return new StringBuilder().append(charSequence).toString();
57    }
58}
59