T4876942.java revision 553:9d9f26857129 
1/*
2 * Copyright (c) 2008, 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 4876942 6715251
27 * @summary javap invoked without args does not print help screen
28 */
29
30import java.io.*;
31import java.util.zip.*;
32
33public class T4876942 {
34    public static void main(String[] args) throws Exception {
35        new T4876942().run();
36    }
37
38    public void run() throws IOException {
39        String output = javap();
40        verify(output, "-public", "-protected", "-private"); // check that some of the options are listed
41
42        if (errors > 0)
43            throw new Error(errors + " found.");
44    }
45
46    String javap(String... args) {
47        StringWriter sw = new StringWriter();
48        PrintWriter out = new PrintWriter(sw);
49        //sun.tools.javap.Main.entry(args);
50        int rc = com.sun.tools.javap.Main.run(args, out);
51        if (rc != (args.length == 0 ? 2 : 0))
52            throw new Error("javap failed. rc=" + rc);
53        out.close();
54        return sw.toString();
55    }
56
57    void verify(String output, String... expects) {
58        for (String expect: expects) {
59            if (output.indexOf(expect)< 0)
60                error(expect + " not found");
61        }
62    }
63
64    void error(String msg) {
65        System.err.println(msg);
66        errors++;
67    }
68
69    int errors;
70}
71