summaryrefslogtreecommitdiffstats
path: root/tests/auto/corelib/codecs/utf8/tst_utf8.cpp
blob: e07b7cb2391853c527865667402243e324dce4c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>

#include <qtextcodec.h>
#include <qsharedpointer.h>

static const char utf8bom[] = "\xEF\xBB\xBF";

class tst_Utf8 : public QObject
{
    Q_OBJECT

public:
    // test data:
    QTextCodec *codec;
    QString (*from8BitPtr)(const char *, int);
    QByteArray (QString:: *to8Bit)() const;

    inline QString from8Bit(const QByteArray &ba)
    { return from8BitPtr(ba.constData(), ba.length()); }
public slots:
    void initTestCase();
    void init();

private slots:
    void roundTrip_data();
    void roundTrip();

    void charByChar_data();
    void charByChar();

    void invalidUtf8_data();
    void invalidUtf8();

    void nonCharacters_data();
    void nonCharacters();
};

void tst_Utf8::initTestCase()
{
    QTest::addColumn<bool>("useLocale");
    QTest::newRow("utf8codec") << false;

    // is the locale UTF-8?
    if (QString(QChar(QChar::ReplacementCharacter)).toLocal8Bit() == "\xEF\xBF\xBD") {
        QTest::newRow("localecodec") << true;
        qDebug() << "locale is utf8";
    }
}

void tst_Utf8::init()
{
    QFETCH_GLOBAL(bool, useLocale);
    if (useLocale) {
        codec = QTextCodec::codecForLocale();
        from8BitPtr = &QString::fromLocal8Bit;
        to8Bit = &QString::toLocal8Bit;
    } else {
        codec = QTextCodec::codecForMib(106);
        from8BitPtr = &QString::fromUtf8;
        to8Bit = &QString::toUtf8;
    }
}

void tst_Utf8::roundTrip_data()
{
    QTest::addColumn<QByteArray>("utf8");
    QTest::addColumn<QString>("utf16");

    QTest::newRow("empty") << QByteArray() << QString();
    QTest::newRow("nul") << QByteArray("", 1) << QString(QChar(QChar::Null));

    static const char ascii[] = "This is a standard US-ASCII message";
    QTest::newRow("ascii") << QByteArray(ascii) << ascii;

    static const char ascii2[] = "\1This\2is\3an\4US-ASCII\020 message interspersed with control chars";
    QTest::newRow("ascii2") << QByteArray(ascii2) << ascii2;

    static const char utf8_1[] = "\302\240"; // NBSP
    QTest::newRow("utf8_1") << QByteArray(utf8_1) << QString(QChar(QChar::Nbsp));

    static const char utf8_2[] = "\342\202\254"; // Euro symbol
    QTest::newRow("utf8_2") << QByteArray(utf8_2) << QString(QChar(0x20AC));

#if 0
    // Can't test this because QString::fromUtf8 consumes it
    static const char utf8_3[] = "\357\273\277"; // byte order mark
    QTest::newRow("utf8_3") << QByteArray(utf8_3) << QString(QChar(QChar::ByteOrderMark));
#endif

    static const char utf8_4[] = "\357\277\275"; // replacement char
    QTest::newRow("utf8_4") << QByteArray(utf8_4) << QString(QChar(QChar::ReplacementCharacter));

    static const char utf8_5[] = "\360\220\210\203"; // U+010203
    static const uint utf32_5[] = { 0x010203 };
    QTest::newRow("utf8_5") << QByteArray(utf8_5) << QString::fromUcs4(utf32_5, 1);

    static const char utf8_6[] = "\364\217\277\275"; // U+10FFFD
    static const uint utf32_6[] = { 0x10FFFD };
    QTest::newRow("utf8_6") << QByteArray(utf8_6) << QString::fromUcs4(utf32_6, 1);

    static const char utf8_7[] = "abc\302\240\303\241\303\251\307\275 \342\202\254def";
    static const ushort utf16_7[] = { 'a', 'b', 'c', 0x00A0,
                                      0x00E1, 0x00E9, 0x01FD,
                                      ' ', 0x20AC, 'd', 'e', 'f', 0 };
    QTest::newRow("utf8_7") << QByteArray(utf8_7) << QString::fromUtf16(utf16_7);

    static const char utf8_8[] = "abc\302\240\303\241\303\251\307\275 \364\217\277\275 \342\202\254def";
    static const uint utf32_8[] = { 'a', 'b', 'c', 0x00A0,
                                    0x00E1, 0x00E9, 0x01FD,
                                    ' ', 0x10FFFD, ' ',
                                    0x20AC, 'd', 'e', 'f', 0 };
    QTest::newRow("utf8_8") << QByteArray(utf8_8) << QString::fromUcs4(utf32_8);
}

void tst_Utf8::roundTrip()
{
    QFETCH(QByteArray, utf8);
    QFETCH(QString, utf16);

    QCOMPARE((utf16.*to8Bit)(), utf8);
    QCOMPARE(from8Bit(utf8), utf16);

    QCOMPARE((from8Bit(utf8).*to8Bit)(), utf8);
    QCOMPARE(from8Bit((utf16.*to8Bit)()), utf16);
}

void tst_Utf8::charByChar_data()
{
    roundTrip_data();
}

void tst_Utf8::charByChar()
{
    QFETCH(QByteArray, utf8);
    QFETCH(QString, utf16);

    {
        // from utf16 to utf8 char by char:
        QSharedPointer<QTextEncoder> encoder = QSharedPointer<QTextEncoder>(codec->makeEncoder());
        QByteArray encoded;

        for (int i = 0; i < utf16.length(); ++i) {
            encoded += encoder->fromUnicode(utf16.constData() + i, 1);
            QVERIFY(!encoder->hasFailure());
        }

        if (encoded.startsWith(utf8bom))
            encoded = encoded.mid(strlen(utf8bom));
        QCOMPARE(encoded, utf8);
    }
    {
        // from utf8 to utf16 char by char:
        QSharedPointer<QTextDecoder> decoder = QSharedPointer<QTextDecoder>(codec->makeDecoder());
        QString decoded;

        for (int i = 0; i < utf8.length(); ++i) {
            decoded += decoder->toUnicode(utf8.constData() + i, 1);
            QVERIFY(!decoder->hasFailure());
        }

        QCOMPARE(decoded, utf16);
    }
}

void tst_Utf8::invalidUtf8_data()
{
    QTest::addColumn<QByteArray>("utf8");

    QTest::newRow("1char") << QByteArray("\x80");
    QTest::newRow("2chars-1") << QByteArray("\xC2\xC0");
    QTest::newRow("2chars-2") << QByteArray("\xC3\xDF");
    QTest::newRow("2chars-3") << QByteArray("\xC7\xF0");
    QTest::newRow("3chars-1") << QByteArray("\xE0\xA0\xC0");
    QTest::newRow("3chars-2") << QByteArray("\xE0\xC0\xA0");
    QTest::newRow("4chars-1") << QByteArray("\xF0\x90\x80\xC0");
    QTest::newRow("4chars-2") << QByteArray("\xF0\x90\xC0\x80");
    QTest::newRow("4chars-3") << QByteArray("\xF0\xC0\x80\x80");

    // Surrogate pairs must now be present either
    // U+D800:        1101   10 0000   00 0000
    // encoding: xxxz:1101 xz10:0000 xz00:0000
    QTest::newRow("hi-surrogate") << QByteArray("\xED\xA0\x80");
    // U+DC00:        1101   11 0000   00 0000
    // encoding: xxxz:1101 xz11:0000 xz00:0000
    QTest::newRow("lo-surrogate") << QByteArray("\xED\xB0\x80");

    // not even in pair:
    QTest::newRow("surrogate-pair") << QByteArray("\xED\xA0\x80\xED\xB0\x80");

    // Characters outside the Unicode range:
    // 0x110000:   00 0100   01 0000   00 0000   00 0000
    // encoding: xxxx:z100 xz01:0000 xz00:0000 xz00:0000
    QTest::newRow("non-unicode-1") << QByteArray("\xF4\x90\x80\x80");
    // 0x200000:             00 1000   00 0000   00 0000   00 0000
    // encoding: xxxx:xz00 xz00:1000 xz00:0000 xz00:0000 xz00:0000
    QTest::newRow("non-unicode-2") << QByteArray("\xF8\x88\x80\x80\x80");
    // 0x04000000:              0100   00 0000   00 0000   00 0000   00 0000
    // encoding: xxxx:xxz0 xz00:0100 xz00:0000 xz00:0000 xz00:0001 xz00:0001
    QTest::newRow("non-unicode-3") << QByteArray("\xFC\x84\x80\x80\x80\x80");
    // 0x7fffffff:       1   11 1111   11 1111   11 1111   11 1111   11 1111
    // encoding: xxxx:xxz0 xz00:0100 xz00:0000 xz00:0000 xz00:0001 xz00:0001
    QTest::newRow("non-unicode-4") << QByteArray("\xFD\xBF\xBF\xBF\xBF\xBF");

    // As seen above, 0xFE and 0xFF never appear:
    QTest::newRow("fe") << QByteArray("\xFE");
    QTest::newRow("fe-bis") << QByteArray("\xFE\xBF\xBF\xBF\xBF\xBF\xBF");
    QTest::newRow("ff") << QByteArray("\xFF");
    QTest::newRow("ff-bis") << QByteArray("\xFF\xBF\xBF\xBF\xBF\xBF\xBF\xBF");

    // some combinations in UTF-8 are invalid even though they have the proper bits set
    // these are known as overlong sequences

    // "A": U+0041:                                               01   00 0001
    // overlong 2:                                         xxz0:0001 xz00:0001
    QTest::newRow("overlong-1-2") << QByteArray("\xC1\x81");
    // overlong 3:                               xxxz:0000 xz00:0001 xz00:0001
    QTest::newRow("overlong-1-3") << QByteArray("\xE0\x81\x81");
    // overlong 4:                     xxxx:z000 xz00:0000 xz00:0001 xz00:0001
    QTest::newRow("overlong-1-4") << QByteArray("\xF0\x80\x81\x81");
    // overlong 5:           xxxx:xz00 xz00:0000 xz00:0000 xz00:0001 xz00:0001
    QTest::newRow("overlong-1-5") << QByteArray("\xF8\x80\x80\x81\x81");
    // overlong 6: xxxx:xxz0 xz00:0000 xz00:0000 xz00:0000 xz00:0001 xz00:0001
    QTest::newRow("overlong-1-6") << QByteArray("\xFC\x80\x80\x80\x81\x81");

    // NBSP: U+00A0:                                             10    00 0000
    // proper encoding:                                    xxz0:0010 xz00:0000
    // overlong 3:                               xxxz:0000 xz00:0010 xz00:0000
    QTest::newRow("overlong-2-3") << QByteArray("\xC0\x82\x80");
    // overlong 4:                     xxxx:z000 xz00:0000 xz00:0010 xz00:0000
    QTest::newRow("overlong-2-4") << QByteArray("\xF0\x80\x82\x80");
    // overlong 5:           xxxx:xz00 xz00:0000 xz00:0000 xz00:0010 xz00:0000
    QTest::newRow("overlong-2-5") << QByteArray("\xF8\x80\x80\x82\x80");
    // overlong 6: xxxx:xxz0 xz00:0000 xz00:0000 xz00:0000 xz00:0010 xz00:0000
    QTest::newRow("overlong-2-6") << QByteArray("\xFC\x80\x80\x80\x82\x80");

    // U+0800:                                               10 0000   00 0000
    // proper encoding:                          xxxz:0000 xz10:0000 xz00:0000
    // overlong 4:                     xxxx:z000 xz00:0000 xz10:0000 xz00:0000
    QTest::newRow("overlong-3-4") << QByteArray("\xF0\x80\xA0\x80");
    // overlong 5:           xxxx:xz00 xz00:0000 xz00:0000 xz10:0000 xz00:0000
    QTest::newRow("overlong-3-5") << QByteArray("\xF8\x80\x80\xA0\x80");
    // overlong 6: xxxx:xxz0 xz00:0000 xz00:0000 xz00:0000 xz10:0000 xz00:0000
    QTest::newRow("overlong-3-6") << QByteArray("\xFC\x80\x80\x80\xA0\x80");

    // U+010000:                                   00 0100   00 0000   00 0000
    // proper encoding:                xxxx:z000 xz00:0100 xz00:0000 xz00:0000
    // overlong 5:           xxxx:xz00 xz00:0000 xz00:0100 xz00:0000 xz00:0000
    QTest::newRow("overlong-4-5") << QByteArray("\xF8\x80\x84\x80\x80");
    // overlong 6: xxxx:xxz0 xz00:0000 xz00:0000 xz00:0100 xz00:0000 xz00:0000
    QTest::newRow("overlong-4-6") << QByteArray("\xFC\x80\x80\x84\x80\x80");
}

void tst_Utf8::invalidUtf8()
{
    QFETCH(QByteArray, utf8);
    QFETCH_GLOBAL(bool, useLocale);

    QSharedPointer<QTextDecoder> decoder = QSharedPointer<QTextDecoder>(codec->makeDecoder());
    decoder->toUnicode(utf8);

    // Only enforce correctness on our UTF-8 decoder
    // The system's UTF-8 codec is sometimes buggy
    //  GNU libc's iconv is known to accept U+FFFF and U+FFFE encoded as UTF-8
    //  OS X's iconv is known to accept those, plus surrogates and codepoints above U+10FFFF
    if (!useLocale)
        QVERIFY(decoder->hasFailure());
    else if (!decoder->hasFailure())
        qWarning("System codec does not report failure when it should. Should report bug upstream.");
}

void tst_Utf8::nonCharacters_data()
{
    QTest::addColumn<QByteArray>("utf8");
    QTest::addColumn<QString>("utf16");

    // Unicode has a couple of "non-characters" that one can use internally,
    // but are not allowed to be used for text interchange.
    //
    // Those are the last two entries each Unicode Plane (U+FFFE, U+FFFF,
    // U+1FFFE, U+1FFFF, etc.) as well as the entries between U+FDD0 and
    // U+FDEF (inclusive)

    // U+FDD0 through U+FDEF
    for (int i = 0; i < 16; ++i) {
        char utf8[] = { 0357, 0267, 0220 + i, 0 };
        QString utf16 = QChar(0xfdd0 + i);
        QTest::newRow(qPrintable(QString::number(0xfdd0 + i, 16))) << QByteArray(utf8) << utf16;
    }

    // the last two in Planes 1 through 16
    for (uint plane = 1; plane <= 16; ++plane) {
        for (uint lower = 0xfffe; lower < 0x10000; ++lower) {
            uint ucs4 = (plane << 16) | lower;
            char utf8[] = { 0xf0 | uchar(ucs4 >> 18),
                            0x80 | (uchar(ucs4 >> 12) & 0x3f),
                            0x80 | (uchar(ucs4 >> 6) & 0x3f),
                            0x80 | (uchar(ucs4) & 0x3f),
                            0 };
            ushort utf16[] = { QChar::highSurrogate(ucs4), QChar::lowSurrogate(ucs4), 0 };

            QTest::newRow(qPrintable(QString::number(ucs4, 16))) << QByteArray(utf8) << QString::fromUtf16(utf16);
        }
    }

    QTest::newRow("fffe") << QByteArray("\xEF\xBF\xBE") << QString(QChar(0xfffe));
    QTest::newRow("ffff") << QByteArray("\xEF\xBF\xBF") << QString(QChar(0xffff));
}

void tst_Utf8::nonCharacters()
{
    QFETCH(QByteArray, utf8);
    QFETCH(QString, utf16);
    QFETCH_GLOBAL(bool, useLocale);

    QSharedPointer<QTextDecoder> decoder = QSharedPointer<QTextDecoder>(codec->makeDecoder());
    decoder->toUnicode(utf8);

    // Only enforce correctness on our UTF-8 decoder
    // The system's UTF-8 codec is sometimes buggy
    //  GNU libc's iconv is known to accept U+FFFF and U+FFFE encoded as UTF-8
    //  OS X's iconv is known to accept those, plus surrogates and codepoints above U+10FFFF
    if (!useLocale)
        QVERIFY(decoder->hasFailure());
    else if (!decoder->hasFailure())
        qWarning("System codec does not report failure when it should. Should report bug upstream.");

    QSharedPointer<QTextEncoder> encoder(codec->makeEncoder());
    encoder->fromUnicode(utf16);
    if (!useLocale)
        QVERIFY(encoder->hasFailure());
    else if (!encoder->hasFailure())
        qWarning("System codec does not report failure when it should. Should report bug upstream.");
}

QTEST_MAIN(tst_Utf8)
#include "tst_utf8.moc"