1/*
2 * Copyright (C) 2008 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 android.core;
18
19import junit.framework.TestCase;
20
21import java.io.ByteArrayInputStream;
22import java.io.InputStreamReader;
23import android.test.suitebuilder.annotation.SmallTest;
24
25/**
26 * Checks basic InputStreamReader functionality.
27 */
28public class InputStreamReaderTest extends TestCase {
29
30    /**
31     * Checks if ASCII encoding works with InputStreamReader
32     */
33    @SmallTest
34    public void testAscii() throws Exception {
35        String str = "AbCdEfGhIjKlMnOpQrStUvWxYzX";
36        ByteArrayInputStream aa = new ByteArrayInputStream(str.getBytes("ISO8859_1"));
37        InputStreamReader a = new InputStreamReader(aa, "ISO8859_1");
38
39        try {
40            int x = a.read();
41            assertEquals('A', x);
42            char[] c = new char[26];
43            x = a.read(c, 0, 26);
44            assertTrue(a.getEncoding().equalsIgnoreCase("ISO8859_1"));
45            assertEquals(26, x);
46            assertEquals("bCdEfGhIjKlMnOpQrStUvWxYzX", String.valueOf(c));
47        } finally {
48            a.close();
49        }
50    }
51
52    /**
53     * Checks if Utf8 encoding works with InputStreamReader
54     */
55    @SmallTest
56    public void testUtf8() throws Exception {
57        String str = "AbCdEfGhIjKlMnOpQrStUvWxYzX" +
58                "\u00a3\u00c5\u00c9";       // total of 30 characters
59        ByteArrayInputStream aa =
60                new ByteArrayInputStream(str.getBytes());
61
62        InputStreamReader a = new InputStreamReader(aa);
63
64        try {
65            assertEquals("UTF8", a.getEncoding());
66
67            int x = a.read();
68            assertEquals('A', x);
69
70            char[] c = new char[29];
71            x = a.read(c, 0, 3);
72            assertEquals(3, x);
73            assertEquals("bCd", new String(c, 0, 3));
74
75            x = a.read(c, 3, 26);
76            assertEquals(26, x);
77            assertEquals("EfGhIjKlMnOpQrStUvWxYzX\u00a3\u00c5\u00c9", new String(c, 3, 26));
78        } finally {
79            a.close();
80        }
81    }
82
83    /**
84     * Checks if several encodings works with InputStreamReader
85     */
86    @SmallTest
87    public void testStringy() throws Exception {
88        String src = "The quick brown fox\u00A0\u00FF" +
89                "\uFFFC\uD7C5\uDC03bloof";
90
91        String[] enc = new String[]{
92                "utf-8", "us-ascii", "iso-8859-1", "utf-16be", "utf-16le",
93                "utf-16",
94        };
95
96        for (int i = 0; i < enc.length; i++) {
97            byte[] ba = src.getBytes(enc[i]);
98
99            String s1 = new String(ba, enc[i]);
100
101            ByteArrayInputStream bais = new ByteArrayInputStream(ba);
102            InputStreamReader r = new InputStreamReader(bais, enc[i]);
103            try {
104                char[] ca = new char[600];
105                int n = r.read(ca, 0, 600);
106
107                String s2 = new String(ca, 0, n);
108                assertEquals(s1, s2);
109            } finally {
110                r.close();
111            }
112        }
113    }
114}
115