1 /*

     2  * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4821213

    26  * @summary Unit test for CharsetEncoder.canEncode methods

    27  */

    28 

    29 import java.io.*;

    30 import java.nio.*;

    31 import java.nio.charset.*;

    32 

    33 

    34 public class CanEncode {

    35 

    36     private static int errors = 0;

    37     private static PrintStream out = System.err;

    38 

    39     private static void wrong(CharsetEncoder ce, boolean can, String what) {

    40         out.println(ce.charset().name()

    41                     + ": Wrong answer for " + what

    42                     + ": " + !can);

    43         errors++;

    44     }

    45 

    46     private static void ck(CharsetEncoder ce, char c, boolean can)

    47         throws Exception

    48     {

    49         if (ce.canEncode(c) != can)

    50             wrong(ce, can,

    51                   ("'" + c + "' (0x"

    52                    + Integer.toHexString(c & 0xffff) + ")"));

    53     }

    54 

    55     private static void ck(CharsetEncoder ce, String s, boolean can)

    56         throws Exception

    57     {

    58         if (ce.canEncode(CharBuffer.wrap(s.toCharArray())) != can)

    59             wrong(ce, can, "array \"" + s + "\"");

    60         if (ce.canEncode(CharBuffer.wrap(s)) != can)

    61             wrong(ce, can, "buffer  \"" + s + "\"");

    62     }

    63 

    64     private static void test(String csn) throws Exception {

    65 

    66         Charset cs = Charset.forName(csn);

    67         CharsetEncoder ce = cs.newEncoder();

    68 

    69         if (cs.name().equals("US-ASCII")) {

    70             ck(ce, 'x', true);

    71             ck(ce, '\u00B6', false);

    72             ck(ce, "x", true);

    73             ck(ce, "\u00B6", false);

    74             ck(ce, "xyzzy", true);

    75             ck(ce, "xy\u00B6", false);

    76         }

    77 

    78         // Unpaired surrogates should never be encodable

    79         ck(ce, '\ud800', false);

    80         ck(ce, '\ud801', false);

    81         ck(ce, '\udffe', false);

    82         ck(ce, '\udfff', false);

    83         ck(ce, "\ud800", false);

    84         ck(ce, "\ud801", false);

    85         ck(ce, "\udffe", false);

    86         ck(ce, "\udfff", false);

    87 

    88     }

    89 

    90     public static void main(String[] args) throws Exception {

    91         test("US-ASCII");

    92         test("UTF-8");

    93     }

    94 

    95 }