1/*
2 * Copyright (c) 2008, 2010, 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/* @test
25 * @summary Verify that if InputStream.read returns 0 we throw an exception.
26 * @bug 4684515
27 */
28
29import java.io.*;
30
31public class ReadZero {
32
33    public static void main(String [] args) throws IOException {
34        ReadZero r = new ReadZero();
35        r.testInputStream();
36    }
37
38    private void testInputStream() throws IOException {
39        File f = new File(System.getProperty("test.src", "."), "ReadZero.java");
40        InputStream is = new FileInputStream(f) {
41            public int read(byte [] b, int off, int len) {
42                System.out.println("FileInputStream.read");
43                return 0;
44            }
45        };
46        try {
47            is.read(new byte[1], 0, 1); // ok
48            InputStreamReader isr = new InputStreamReader(is);
49
50            try {
51                int res = isr.read(new char[1], 0, 1);
52            } catch (IOException x) {
53                System.out.println("IOException caught");
54                return;
55            }
56        } finally {
57            is.close();
58        }
59        throw new RuntimeException("IOException not thrown");
60    }
61}
62