add QTextBlock test

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

tests/auto/qtextblock/CMakeLists.txt

@@ -0,0 +1,3 @@
+katie_gui_test(tst_qtextblock
+    ${CMAKE_CURRENT_SOURCE_DIR}/tst_qtextblock.cpp
+)

tests/auto/qtextblock/tst_qtextblock.cpp

@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 Ivailo Monev
+**
+** This file is part of the test suite of the Katie 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+
+
+#define private public
+#include <qtextdocument.h>
+#include <qdebug.h>
+#include <qtextdocument_p.h>
+#include <qtextobject.h>
+#include <qtextcursor.h>
+#include <qtextdocument.h>
+
+
+//TESTED_FILES=
+
+class tst_QTextBlock : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QTextBlock();
+
+
+public slots:
+    void init();
+    void cleanup();
+private slots:
+    void fragmentOverBlockBoundaries();
+    void excludeParagraphSeparatorFragment();
+    void backwardsBlockIterator();
+    void previousBlock_qtbug18026();
+
+private:
+    QTextDocument *doc;
+    QTextCursor cursor;
+};
+
+tst_QTextBlock::tst_QTextBlock()
+{}
+
+void tst_QTextBlock::init()
+{
+    doc = new QTextDocument;
+    cursor = QTextCursor(doc);
+}
+
+void tst_QTextBlock::cleanup()
+{
+    cursor = QTextCursor();
+    delete doc;
+    doc = 0;
+}
+
+void tst_QTextBlock::fragmentOverBlockBoundaries()
+{
+    /* this creates two fragments in the piecetable:
+     * 1) 'hello<parag separator here>world'
+     * 2) '<parag separator>'
+     * (they are not united because the former was interested after the latter,
+     * hence their position in the pt buffer is the other way around)
+     */
+    cursor.insertText("Hello");
+    cursor.insertBlock();
+    cursor.insertText("World");
+
+    cursor.movePosition(QTextCursor::Start);
+
+    const QTextDocument *doc = cursor.block().document();
+    QVERIFY(doc);
+    // Block separators are always a fragment of their self. Thus:
+    // |Hello|\b|World|\b|
+    QVERIFY(doc->d_func()->fragmentMap().numNodes() == 4);
+
+    QCOMPARE(cursor.block().text(), QString("Hello"));
+    cursor.movePosition(QTextCursor::NextBlock);
+    QCOMPARE(cursor.block().text(), QString("World"));
+}
+
+void tst_QTextBlock::excludeParagraphSeparatorFragment()
+{
+    QTextCharFormat fmt;
+    fmt.setForeground(Qt::blue);
+    cursor.insertText("Hello", fmt);
+
+    QTextBlock block = doc->begin();
+    QVERIFY(block.isValid());
+
+    QTextBlock::Iterator it = block.begin();
+
+    QTextFragment fragment = it.fragment();
+    QVERIFY(fragment.isValid());
+    QCOMPARE(fragment.text(), QString("Hello"));
+
+    ++it;
+    QVERIFY(it.atEnd());
+    QVERIFY(it == block.end());
+}
+
+void tst_QTextBlock::backwardsBlockIterator()
+{
+    QTextCharFormat fmt;
+
+    fmt.setForeground(Qt::magenta);
+    cursor.insertText("A", fmt);
+
+    fmt.setForeground(Qt::red);
+    cursor.insertText("A", fmt);
+
+    fmt.setForeground(Qt::magenta);
+    cursor.insertText("A", fmt);
+
+    QTextBlock block = doc->begin();
+    QVERIFY(block.isValid());
+
+    QTextBlock::Iterator it = block.begin();
+    QCOMPARE(it.fragment().position(), 0);
+    ++it;
+    QCOMPARE(it.fragment().position(), 1);
+    ++it;
+
+    QCOMPARE(it.fragment().position(), 2);
+
+    --it;
+    QCOMPARE(it.fragment().position(), 1);
+    --it;
+    QCOMPARE(it.fragment().position(), 0);
+}
+
+void tst_QTextBlock::previousBlock_qtbug18026()
+{
+    QTextBlock last = doc->end().previous();
+    QVERIFY(last.isValid());
+}
+
+QTEST_MAIN(tst_QTextBlock)
+
+#include "moc_tst_qtextblock.cpp"