add QScrollArea test

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

tests/auto/qscrollarea/CMakeLists.txt

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

tests/auto/qscrollarea/tst_qscrollarea.cpp

@@ -0,0 +1,126 @@
+/****************************************************************************
+**
+** 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>
+
+#include <qcoreapplication.h>
+#include <qdebug.h>
+#include <qscrollarea.h>
+#include <qlayout.h>
+
+// TESTED_CLASS=
+// TESTED_FILES=
+
+class tst_QScrollArea : public QObject
+{
+Q_OBJECT
+
+public:
+    tst_QScrollArea();
+    virtual ~tst_QScrollArea();
+
+private slots:
+    void getSetCheck();
+    void checkHFW_Task_197736();
+};
+
+tst_QScrollArea::tst_QScrollArea()
+{
+}
+
+tst_QScrollArea::~tst_QScrollArea()
+{
+}
+
+// Testing get/set functions
+void tst_QScrollArea::getSetCheck()
+{
+    QScrollArea obj1;
+    // QWidget * QScrollArea::widget()
+    // void QScrollArea::setWidget(QWidget *)
+    QWidget *var1 = new QWidget();
+    obj1.setWidget(var1);
+    QCOMPARE(var1, obj1.widget());
+    obj1.setWidget((QWidget *)0);
+    QCOMPARE(var1, obj1.widget()); // Cannot set a 0-widget. Old widget returned
+    // delete var1; // No delete, since QScrollArea takes ownership
+
+    // bool QScrollArea::widgetResizable()
+    // void QScrollArea::setWidgetResizable(bool)
+    obj1.setWidgetResizable(false);
+    QCOMPARE(false, obj1.widgetResizable());
+    obj1.setWidgetResizable(true);
+    QCOMPARE(true, obj1.widgetResizable());
+}
+
+class HFWWidget : public QWidget
+{
+    public:
+        HFWWidget();
+        int heightForWidth(int w) const;
+};
+
+HFWWidget::HFWWidget()
+    : QWidget()
+{
+    setMinimumSize(QSize(100,50));
+    QSizePolicy s = sizePolicy();
+    s.setHeightForWidth(true);
+    setSizePolicy(s);
+}
+
+int HFWWidget::heightForWidth(int w) const
+{
+    // Mimic a label - the narrower we are, the taller we have to be
+    if (w > 0)
+        return 40000 / w;
+    else
+        return 40000;
+}
+
+void tst_QScrollArea::checkHFW_Task_197736()
+{
+    QScrollArea scrollArea;
+    HFWWidget *w = new HFWWidget;
+    scrollArea.resize(200,100);
+    scrollArea.show();
+    scrollArea.setWidgetResizable(true);
+    scrollArea.setWidget(w);
+
+    // at 200x100px, we expect HFW to be 200px tall, not 100px
+    QVERIFY(w->height() >= 200);
+
+    // at 200x300px, we expect HFW to be 300px tall (the heightForWidth is a min, not prescribed)
+    scrollArea.resize(QSize(200, 300));
+    QVERIFY(w->height() >= 250); // 50px for a fudge factor (size of frame margins/scrollbars etc)
+
+    // make sure this only happens with widget resizable
+    scrollArea.setWidgetResizable(false);
+    scrollArea.resize(QSize(100,100));
+    w->resize(QSize(200,200));
+    QVERIFY(w->width() == 200);
+    QVERIFY(w->height() == 200);
+}
+
+QTEST_MAIN(tst_QScrollArea)
+
+#include "moc_tst_qscrollarea.cpp"