1/*
2 * Copyright (c) 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 * @bug 4821213
26 * @summary Unit test for CharsetEncoder.canEncode methods
27 */
28
29import java.io.*;
30import java.nio.*;
31import java.nio.charset.*;
32
33
34public 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}
96