Add a test for UTF-8 conditions

2 files changed, 312 insertions, 0 deletions

diff --git a/tests/auto/utf8/tst_utf8.cpp b/tests/auto/utf8/tst_utf8.cpp
new file mode 100644
index 0000000000..3aef69ff0b
--- /dev/null
+++ b/tests/auto/utf8/tst_utf8.cpp
@@ -0,0 +1,309 @@
+/****************************************************************************
+**
+** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtTest/QtTest>
+
+#include <qtextcodec.h>
+#include <qsharedpointer.h>
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+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 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\277"; // U+10FFFF
+    static const uint utf32_6[] = { 0x10FFFF };
+    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\277 \342\202\254def";
+    static const uint utf32_8[] = { 'a', 'b', 'c', 0x00A0,
+                                    0x00E1, 0x00E9, 0x01FD,
+                                    ' ', 0x10FFFF, ' ',
+                                    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") << QByteArray("\xC2\xC0");
+    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");
+
+    // U+FFFE and U+FFFF are non-characters and must not be present
+    // U+FFFE:        1111   11 1111   11 1110
+    // encoding: xxxz:1111 xz11:1111 xz11:1110
+    QTest::newRow("fffe") << QByteArray("\xEF\xBF\xBE");
+    // U+FFFF:        1111   11 1111   11 1111
+    // encoding: xxxz:1111 xz11:1111 xz11:1111
+    QTest::newRow("ffff") << QByteArray("\xEF\xBF\xBF");
+
+    // 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-3") << 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-2-4") << QByteArray("\xF8\x80\x80\x82\x80");
+    // overlong 6: xxxx:xxz0 xz00:0000 xz00:0000 xz00:0000 xz00:0010 xz00:0000
+    QTest::newRow("overlong-2-4") << 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);
+
+    QSharedPointer<QTextDecoder> decoder = QSharedPointer<QTextDecoder>(codec->makeDecoder());
+    QString decoded = decoder->toUnicode(utf8);
+    QVERIFY(decoder->hasFailure());
+}
+
+QTEST_MAIN(tst_Utf8)
+#include "tst_utf8.moc"
diff --git a/tests/auto/utf8/utf8.pro b/tests/auto/utf8/utf8.pro
new file mode 100644
index 0000000000..4ec6851b9b
--- /dev/null
+++ b/tests/auto/utf8/utf8.pro
@@ -0,0 +1,3 @@
+load(qttest_p4)
+QT -= gui
+SOURCES  += tst_utf8.cpp