Add a first unit test for Dolphin, which verifies that the fix for one

of the problems related to Dolphin's modifications to QTreeView works
as it should.

This is only a small start, but I hope that we can cover at least the
basic functionality of DolphinView, the three item views and possibly
a couple of other classes with a rather stable API soon.

svn path=/trunk/KDE/kdebase/apps/; revision=1188049

3 files changed, 128 insertions, 0 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e35c8efb4..47f44c497 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,4 @@
+add_subdirectory(tests)
 
 find_package(QImageBlitz REQUIRED)
 
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
new file mode 100644
index 000000000..8488c42c6
--- /dev/null
+++ b/src/tests/CMakeLists.txt
@@ -0,0 +1,5 @@
+set( EXECUTABLE_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR} )
+include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/.. ${KDE4_INCLUDES} )
+
+kde4_add_unit_test(dolphintreeviewtest TEST dolphintreeviewtest.cpp)
+target_link_libraries(dolphintreeviewtest dolphinprivate ${QT_QTCORE_LIBRARY} ${QT_QTGUI_LIBRARY} ${QT_QTTEST_LIBRARY})
diff --git a/src/tests/dolphintreeviewtest.cpp b/src/tests/dolphintreeviewtest.cpp
new file mode 100644
index 000000000..05aa62158
--- /dev/null
+++ b/src/tests/dolphintreeviewtest.cpp
@@ -0,0 +1,122 @@
+/***************************************************************************
+ *   Copyright (C) 2010 by Frank Reininghaus ([email protected])    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include <qtest_kde.h>
+
+#include "views/dolphintreeview.h"
+
+#include <qtestkeyboard.h>
+#include <QtGui/QStringListModel>
+
+class DolphinTreeViewTest : public QObject
+{
+    Q_OBJECT
+
+private slots:
+
+    void bug218114_visualRegionForSelection();
+
+};
+
+/**
+ * TestView is a simple view class derived from DolphinTreeView.
+ * It makes sure that the visualRect for each index contains only the item text as
+ * returned by QAbstractItemModel::data(...) for the role Qt::DisplayRole.
+ *
+ * We have to check that DolphinTreeView handles the case of visualRects with different widths
+ * correctly because this is the case in DolphinDetailsView which is derived from DolphinTreeView.
+ */
+
+class TestView : public DolphinTreeView
+{
+    Q_OBJECT
+
+public:
+
+    TestView(QWidget* parent = 0) : DolphinTreeView(parent) {};
+    ~TestView() {};
+
+    QRect visualRect(const QModelIndex& index) const {
+        QRect rect = DolphinTreeView::visualRect(index);
+
+        const QStyleOptionViewItem option = viewOptions();
+        const QFontMetrics fontMetrics(option.font);
+        int width = option.decorationSize.width() + fontMetrics.width(model()->data(index).toString());
+
+        rect.setWidth(width);
+        return rect;
+    }
+
+};
+
+/**
+ * QTreeView assumes implicitly that the width of each item's visualRect is the same. This leads to painting
+ * problems in Dolphin if items with different widths are in one QItemSelectionRange, see
+ *
+ * https://bugs.kde.org/show_bug.cgi?id=218114
+ *
+ * To fix this, DolphinTreeView has a custom implementation of visualRegionForSelection(). The following
+ * unit test checks that.
+ */
+
+void DolphinTreeViewTest::bug218114_visualRegionForSelection()
+{
+    QStringList items;
+    items << "a" << "an item with a long name" << "a";
+    QStringListModel model(items);
+
+    QModelIndex index0 = model.index(0, 0);
+    QModelIndex index1 = model.index(1, 0);
+    QModelIndex index2 = model.index(2, 0);
+
+    TestView view;
+    view.setModel(&model);
+    view.setSelectionMode(QAbstractItemView::ExtendedSelection);
+    view.resize(400, 400);
+    view.show();
+    QTest::qWaitForWindowShown(&view);
+
+    // First check that the width of index1 is larger than that of index0 and index2 (this triggers the bug).
+
+    QVERIFY(view.visualRect(index0).width() < view.visualRect(index1).width());
+    QVERIFY(view.visualRect(index2).width() < view.visualRect(index1).width());
+
+    // Select all items in one go.
+
+    view.selectAll();
+    const QItemSelection selection = view.selectionModel()->selection();
+    QCOMPARE(selection.count(), 1);
+    QCOMPARE(selection.indexes().count(), 3);
+
+    // Verify that the visualRegionForSelection contains all visualRects.
+    // We do this indirectly using QRegion::boundingRect() because
+    // QRegion::contains(const QRect&) returns true even if the QRect is not
+    // entirely inside the QRegion.
+
+    const QRegion region = view.visualRegionForSelection(selection);
+    const QRect boundingRect = region.boundingRect();
+
+    QVERIFY(boundingRect.contains(view.visualRect(index0)));
+    QVERIFY(boundingRect.contains(view.visualRect(index1)));
+    QVERIFY(boundingRect.contains(view.visualRect(index2)));
+}
+
+QTEST_KDEMAIN(DolphinTreeViewTest, GUI)
+
+#include "dolphintreeviewtest.moc"
\ No newline at end of file