add folding test again

This test still crashes: The cursor is hidden in a folding
region. Moving the cursor crashes Kate.

CCBUG: 311866

tests/CMakeLists.txt

@@ -182,6 +182,17 @@ target_link_libraries( templatehandler_test
   katepartinterfaces
 )
 
+########### text folding test ###############
+
+kde4_add_unit_test(katecodefoldingtest TESTNAME codefoldingtest katefoldingtest.cpp)
+
+target_link_libraries( katecodefoldingtest
+  ${KDE4_KDEUI_LIBS}
+  ${QT_QTTEST_LIBRARY}
+  ${KATE_TEST_LINK_LIBS}
+  katepartinterfaces
+)
+
 ########### indenting test ################
 
 set(indenttest_SRCS

tests/data/bug311866.cpp

+int main()
+{
+  int this_line_is_safe=1;
+  int that_line_will_cause_havoc=1;
+}
\ No newline at end of file

tests/katefoldingtest.cpp

+/*  This file is part of the Kate project.
+ *
+ *  Copyright (C) 2013 Dominik Haumann <dhaumann@kde.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#include "katefoldingtest.h"
+
+#include <qtest_kde.h>
+
+#include <kateglobal.h>
+#include <katebuffer.h>
+#include <katedocument.h>
+#include <kateview.h>
+#include <kateconfig.h>
+
+using namespace KTextEditor;
+
+QTEST_KDEMAIN(KateFoldingTest, GUI)
+
+namespace QTest {
+  template<>
+  char *toString(const KTextEditor::Cursor &cursor)
+  {
+    QByteArray ba = "Cursor[" + QByteArray::number(cursor.line())
+                    + ", " + QByteArray::number(cursor.column()) + "]";
+    return qstrdup(ba.data());
+  }
+}
+
+void KateFoldingTest::initTestCase()
+{
+  KateGlobal::self()->incRef();
+}
+
+void KateFoldingTest::cleanupTestCase()
+{
+    KateGlobal::self()->decRef();
+}
+
+// This is a unit test for bug 311866 (http://bugs.kde.org/show_bug.cgi?id=311866)
+// It loads 5 lines of C++ code, places the cursor in line 4, and then folds
+// the code.
+// Expected behavior: the cursor should be moved so it stays visible
+// Buggy behavior: the cursor is hidden, and moving the hidden cursor crashes kate
+void KateFoldingTest::testCrash311866()
+{
+  KateDocument doc(false, false, false);
+  QString url = KDESRCDIR + QString("data/bug311866.cpp");
+  doc.openUrl(url);
+  doc.setHighlightingMode("C++");
+  doc.buffer().ensureHighlighted (6);
+
+  KateView* view = static_cast<KateView*>(doc.createView(0));
+  view->show();
+  view->resize(400, 300);
+  view->setCursorPosition(Cursor(3, 0));
+  QTest::qWait(100);
+
+  view->slotFoldToplevelNodes();
+  doc.buffer().ensureHighlighted (6);
+
+  qDebug() << "!!! Does the next line crash?";
+  view->up();
+}

tests/katefoldingtest.h

+/* This file is part of the KDE libraries
+   Copyright (C) 2013 Dominik Haumann <dhaumann@kde.org>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KATE_FOLDING_TEST_H
+#define KATE_FOLDING_TEST_H
+
+#include <QtCore/QObject>
+
+class KateFoldingTest : public QObject
+{
+  Q_OBJECT
+
+public Q_SLOTS:
+  void initTestCase();
+  void cleanupTestCase();
+
+private Q_SLOTS:
+  void testCrash311866();
+};
+
+#endif // KATE_FOLDING_TEST_H