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 libcore.java.io;
18
19import java.io.ByteArrayInputStream;
20import java.io.ByteArrayOutputStream;
21import java.io.DataInputStream;
22import java.io.DataOutputStream;
23import java.io.IOException;
24import java.io.InputStream;
25import junit.framework.Assert;
26import junit.framework.TestCase;
27
28public class OldAndroidDataInputStreamTest extends TestCase {
29
30    public void testDataInputStream() throws Exception {
31        String str = "AbCdEfGhIjKlM\nOpQ\rStUvWxYz";
32        ByteArrayInputStream aa = new ByteArrayInputStream(str.getBytes());
33        ByteArrayInputStream ba = new ByteArrayInputStream(str.getBytes());
34        ByteArrayInputStream ca = new ByteArrayInputStream(str.getBytes());
35        ByteArrayInputStream da = new ByteArrayInputStream(str.getBytes());
36
37        DataInputStream a = new DataInputStream(aa);
38        try {
39            Assert.assertEquals(str, read(a));
40        } finally {
41            a.close();
42        }
43
44        DataInputStream b = new DataInputStream(ba);
45        try {
46            Assert.assertEquals("AbCdEfGhIj", read(b, 10));
47        } finally {
48            b.close();
49        }
50
51        DataInputStream c = new DataInputStream(ca);
52        try {
53            Assert.assertEquals("bdfhjl\np\rtvxz", skipRead(c));
54        } finally {
55            c.close();
56        }
57
58        DataInputStream d = new DataInputStream(da);
59        try {
60            assertEquals("AbCdEfGhIjKlM", d.readLine());
61            assertEquals("OpQ", d.readLine());
62            assertEquals("StUvWxYz", d.readLine());
63        } finally {
64            d.close();
65        }
66
67        ByteArrayOutputStream e = new ByteArrayOutputStream();
68        DataOutputStream f = new DataOutputStream(e);
69        try {
70            f.writeBoolean(true);
71            f.writeByte('a');
72            f.writeBytes("BCD");
73            f.writeChar('e');
74            f.writeChars("FGH");
75            f.writeUTF("ijklm");
76            f.writeDouble(1);
77            f.writeFloat(2);
78            f.writeInt(3);
79            f.writeLong(4);
80            f.writeShort(5);
81        } finally {
82            f.close();
83        }
84
85        ByteArrayInputStream ga = new ByteArrayInputStream(e.toByteArray());
86        DataInputStream g = new DataInputStream(ga);
87
88        try {
89            assertTrue(g.readBoolean());
90            assertEquals('a', g.readByte());
91            assertEquals(2, g.skipBytes(2));
92            assertEquals('D', g.readByte());
93            assertEquals('e', g.readChar());
94            assertEquals('F', g.readChar());
95            assertEquals('G', g.readChar());
96            assertEquals('H', g.readChar());
97            assertEquals("ijklm", g.readUTF());
98            assertEquals(1, g.readDouble(), 0);
99            assertEquals(2f, g.readFloat(), 0f);
100            assertEquals(3, g.readInt());
101            assertEquals(4, g.readLong());
102            assertEquals(5, g.readShort());
103        } finally {
104            g.close();
105        }
106    }
107
108    public static String read(InputStream a) throws IOException {
109        int r;
110        StringBuilder builder = new StringBuilder();
111        do {
112            r = a.read();
113            if (r != -1)
114                builder.append((char) r);
115        } while (r != -1);
116        return builder.toString();
117    }
118
119    public static String read(InputStream a, int x) throws IOException {
120        byte[] b = new byte[x];
121        int len = a.read(b, 0, x);
122        if (len < 0) {
123            return "";
124        }
125        return new String(b, 0, len);
126    }
127
128    public static String skipRead(InputStream a) throws IOException {
129        int r;
130        StringBuilder builder = new StringBuilder();
131        do {
132            a.skip(1);
133            r = a.read();
134            if (r != -1)
135                builder.append((char) r);
136        } while (r != -1);
137        return builder.toString();
138    }
139
140    public static String markRead(InputStream a, int x, int y) throws IOException {
141        int m = 0;
142        int r;
143        StringBuilder builder = new StringBuilder();
144        do {
145            m++;
146            r = a.read();
147            if (m == x)
148                a.mark((x + y));
149            if (m == (x + y))
150                a.reset();
151
152            if (r != -1)
153                builder.append((char) r);
154        } while (r != -1);
155        return builder.toString();
156    }
157}
158