1 /*
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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
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22  */
23 
24 /* @test
25  * @bug 6196991
26  * @summary Roundtrip Encoding/Decoding of just one ASCII char
27  * @author Martin Buchholz
28  */
29 
30 import java.util.*;
31 import java.nio.*;
32 import java.nio.charset.*;
33 
34 public class FindASCIICodingBugs {
35     private static int failures = 0;
36 
check(boolean condition)37     private static void check(boolean condition) {
38         if (! condition) {
39             new Error("test failed").printStackTrace();
40             failures++;
41         }
42     }
43 
equals(byte[] ba, ByteBuffer bb)44     private static boolean equals(byte[] ba, ByteBuffer bb) {
45         if (ba.length != bb.limit())
46             return false;
47         for (int i = 0; i < ba.length; i++)
48             if (ba[i] != bb.get(i))
49                 return false;
50         return true;
51     }
52 
main(String[] args)53     public static void main(String[] args) throws Exception {
54         for (Map.Entry<String,Charset> e
55                  : Charset.availableCharsets().entrySet()) {
56             String csn = e.getKey();
57             Charset cs = e.getValue();
58 
59             // Delete the following lines when these charsets are fixed!
60             if (csn.equals("x-JIS0208"))      continue; // MalformedInput
61             if (csn.equals("JIS_X0212-1990")) continue; // MalformedInput
62 
63             if (! cs.canEncode()) continue;
64 
65             CharsetEncoder enc = cs.newEncoder();
66             CharsetDecoder dec = cs.newDecoder();
67 
68             if (! enc.canEncode('A')) continue;
69 
70             System.out.println(csn);
71 
72             try {
73                 byte[] bytes1 = "A".getBytes(csn);
74                 ByteBuffer bb = enc.encode(CharBuffer.wrap(new char[]{'A'}));
75 
76                 check(equals(bytes1, bb));
77                 check(new String(bytes1, csn).equals("A"));
78 
79                 CharBuffer cb = dec.decode(bb);
80                 check(cb.toString().equals("A"));
81             } catch (Throwable t) {
82                 t.printStackTrace();
83                 failures++;
84             }
85         }
86 
87         if (failures > 0)
88             throw new Exception(failures + "tests failed");
89     }
90 }
91