1/*
2 * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24
25/* @test
26   @bug 4017414
27   @summary Check for correct implementation of PushbackInputStream.available
28   */
29
30import java.io.*;
31
32
33
34public class Available{
35
36    private static void dotest(PushbackInputStream in , int expected)
37        throws Exception
38    {
39
40        int got = in.available();
41        System.err.println("available must be " + expected + " , got : " + got);
42        if (got != expected) {
43            throw new
44                RuntimeException("Unexpected number of bytes available in the PushBackInputStream");
45        }
46
47    }
48
49
50
51    public static void main(String args[]) throws Exception{
52
53        PushbackInputStream in = new
54            PushbackInputStream(new ByteArrayInputStream(new byte[10]),5);
55
56        dotest(in , 10);
57
58        in.read();
59        dotest(in , 9);
60
61        in.unread(20);
62        dotest(in , 10);
63
64        in.unread(20);
65        dotest(in , 11);
66
67    }
68
69}
70