Added example for QML auto test

Defined a new macro QTDC_QUICK_TEST_MAIN, to have QApplication as
QCoreApplication instance because QtDC still depends on QtWidget.

Change-Id: Ie28aba092b4741c3b8e0b89ab77fb338947b4a7e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Liang Qi <liang.qi@digia.com>

tests/auto/auto.pro

+TEMPLATE = subdirs
+SUBDIRS += qtdesktop

tests/auto/qtdesktop/data/tst_button.qml

+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+import QtTest 1.0
+
+TestCase {
+    id: testCase
+    name: "Tests_Button"
+    when:windowShown
+    width:400
+    height:400
+
+    function cleanupTestCase() {
+        wait(100) //wait for a short while to make sure no leaked textures
+    }
+
+    function test_defaultbutton() {
+        var tmp = Qt.createQmlObject('import QtDesktop 1.0; Button {id: button1}', testCase, '');
+        compare(tmp.defaultbutton, false);
+    }
+
+    function test_text() {
+        var tmp1 = Qt.createQmlObject('import QtDesktop 1.0; Button {id: button2_1}', testCase, '');
+        compare(tmp1.text, "");
+        tmp1.text = "Hello";
+        compare(tmp1.text, "Hello");
+
+        var tmp2 = Qt.createQmlObject('import QtDesktop 1.0; Button {id: button2_2; text: "Hello"}', testCase, '');
+        compare(tmp2.text, "Hello");
+    }
+}

tests/auto/qtdesktop/qtdesktop.pro

+TEMPLATE = app
+TARGET = tst_qtdesktop
+
+QT += widgets
+
+CONFIG += qmltestcase
+
+INCLUDEPATH += $$PWD/../../shared
+SOURCES += tst_qtdesktop.cpp
+
+TESTDATA = data/*
+
+OTHER_FILES += \
+    data/tst_button.qml
+
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0

tests/auto/qtdesktop/tst_qtdesktop.cpp

+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtQuickTest/quicktest.h>
+#include "qtdc_quicktest.h"
+QTDC_QUICK_TEST_MAIN(qtdesktop)

tests/shared/qtdc_quicktest.h

+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTDC_QUICKTEST_H
+#define QTDC_QUICKTEST_H
+
+#include <QtQuickTest/quicktestglobal.h>
+#include <QtWidgets/QApplication>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+#ifdef QUICK_TEST_SOURCE_DIR
+#define QTDC_QUICK_TEST_MAIN_VAR QUICK_TEST_SOURCE_DIR
+#else
+#define QTDC_QUICK_TEST_MAIN_VAR 0
+#endif
+
+#define QTDC_QUICK_TEST_MAIN(name) \
+    int main(int argc, char **argv) \
+    { \
+        QCoreApplication* app = 0; \
+        if (!QCoreApplication::instance()) \
+            app = new QApplication(argc, argv); \
+        int i = quick_test_main(argc, argv, #name, QTDC_QUICK_TEST_MAIN_VAR); \
+        delete app; \
+        return i; \
+    }
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif

tests/tests.pro

+TEMPLATE = subdirs
+SUBDIRS +=  auto