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diff --git a/src/quickcontrolstestutils/controlstestutils.cpp b/src/quickcontrolstestutils/controlstestutils.cpp
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+++ b/src/quickcontrolstestutils/controlstestutils.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "controlstestutils_p.h"
+
+#include <QtTest/qsignalspy.h>
+#include <QtQuickControls2/qquickstyle.h>
+#include <QtQuickTemplates2/private/qquickabstractbutton_p.h>
+#include <QtQuickTemplates2/private/qquickapplicationwindow_p.h>
+
+QQuickControlsTestUtils::QQuickControlsApplicationHelper::QQuickControlsApplicationHelper(QQmlDataTest *testCase,
+    const QString &testFilePath, const QStringList &qmlImportPaths, const QVariantMap &initialProperties)
+    : QQuickApplicationHelper(testCase, testFilePath, qmlImportPaths, initialProperties)
+{
+    if (ready)
+        appWindow = qobject_cast<QQuickApplicationWindow*>(cleanup.data());
+}
+
+bool QQuickControlsTestUtils::QQuickStyleHelper::updateStyle(const QString &style)
+{
+    // If it's not the first time a style has been set and the new style is not different, do nothing.
+    if (!currentStyle.isEmpty() && style == currentStyle)
+        return false;
+
+    engine.reset();
+    currentStyle = style;
+    qmlClearTypeRegistrations();
+    engine.reset(new QQmlEngine);
+    QQuickStyle::setStyle(style);
+
+    QQmlComponent component(engine.data());
+    component.setData(QString::fromUtf8("import QtQuick\nimport QtQuick.Controls\n Control { }").toUtf8(), QUrl());
+
+    return true;
+}
+
+void QQuickControlsTestUtils::forEachControl(QQmlEngine *engine, const QString &qqc2ImportPath,
+    const QString &sourcePath, const QString &targetPath, const QStringList &skipList,
+    QQuickControlsTestUtils::ForEachCallback callback)
+{
+    // We cannot use QQmlComponent to load QML files directly from the source tree.
+    // For styles that use internal QML types (eg. material/Ripple.qml), the source
+    // dir would be added as an "implicit" import path overriding the actual import
+    // path (qtbase/qml/QtQuick/Controls.2/Material). => The QML engine fails to load
+    // the style C++ plugin from the implicit import path (the source dir).
+    //
+    // Therefore we only use the source tree for finding out the set of QML files that
+    // a particular style implements, and then we locate the respective QML files in
+    // the engine's import path. This way we can use QQmlComponent to load each QML file
+    // for benchmarking.
+
+    const QFileInfoList entries = QDir(qqc2ImportPath + QLatin1Char('/') + sourcePath).entryInfoList(
+        QStringList(QStringLiteral("*.qml")), QDir::Files);
+    for (const QFileInfo &entry : entries) {
+        QString name = entry.baseName();
+        if (!skipList.contains(name)) {
+            const auto importPathList = engine->importPathList();
+            for (const QString &importPath : importPathList) {
+                QString name = entry.dir().dirName() + QLatin1Char('/') + entry.fileName();
+                QString filePath = importPath + QLatin1Char('/') + targetPath + QLatin1Char('/') + entry.fileName();
+                if (filePath.startsWith(QLatin1Char(':')))
+                    filePath.prepend(QStringLiteral("qrc"));
+                if (QFile::exists(filePath)) {
+                    callback(name, QUrl::fromLocalFile(filePath));
+                    break;
+                } else {
+                    QUrl url(filePath);
+                    filePath = QQmlFile::urlToLocalFileOrQrc(filePath);
+                    if (!filePath.isEmpty() && QFile::exists(filePath)) {
+                        callback(name, url);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+}
+
+void QQuickControlsTestUtils::addTestRowForEachControl(QQmlEngine *engine, const QString &qqc2ImportPath,
+    const QString &sourcePath, const QString &targetPath, const QStringList &skipList)
+{
+    forEachControl(engine, qqc2ImportPath, sourcePath, targetPath, skipList, [&](const QString &relativePath, const QUrl &absoluteUrl) {
+        QTest::newRow(qPrintable(relativePath)) << absoluteUrl;
+    });
+}
+
+bool QQuickControlsTestUtils::verifyButtonClickable(QQuickAbstractButton *button)
+{
+    if (!button->window()) {
+        qWarning() << "button" << button << "doesn't have an associated window";
+        return false;
+    }
+
+    if (!button->isEnabled()) {
+        qWarning() << "button" << button << "is not enabled";
+        return false;
+    }
+
+    if (!button->isVisible()) {
+        qWarning() << "button" << button << "is not visible";
+        return false;
+    }
+
+    if (button->width() <= 0.0) {
+        qWarning() << "button" << button << "must have a width greater than 0";
+        return false;
+    }
+
+    if (button->height() <= 0.0) {
+        qWarning() << "button" << button << "must have a height greater than 0";
+        return false;
+    }
+
+    return true;
+}
+
+bool QQuickControlsTestUtils::clickButton(QQuickAbstractButton *button)
+{
+    if (!verifyButtonClickable(button))
+        return false;
+
+    QSignalSpy spy(button, &QQuickAbstractButton::clicked);
+    if (!spy.isValid()) {
+        qWarning() << "button" << button << "must have a valid clicked signal";
+        return false;
+    }
+
+    const QPoint buttonCenter = button->mapToScene(QPointF(button->width() / 2, button->height() / 2)).toPoint();
+    QTest::mouseClick(button->window(), Qt::LeftButton, Qt::NoModifier, buttonCenter);
+    if (spy.count() != 1) {
+        qWarning() << "clicked signal of button" << button << "was not emitted after clicking";
+        return false;
+    }
+
+    return true;
+}
+
+bool QQuickControlsTestUtils::doubleClickButton(QQuickAbstractButton *button)
+{
+    if (!verifyButtonClickable(button))
+        return false;
+
+    QSignalSpy spy(button, &QQuickAbstractButton::clicked);
+    if (!spy.isValid()) {
+        qWarning() << "button" << button << "must have a valid doubleClicked signal";
+        return false;
+    }
+
+    const QPoint buttonCenter = button->mapToScene(QPointF(button->width() / 2, button->height() / 2)).toPoint();
+    QTest::mouseDClick(button->window(), Qt::LeftButton, Qt::NoModifier, buttonCenter);
+    if (spy.count() != 1) {
+        qWarning() << "doubleClicked signal of button" << button << "was not emitted after double-clicking";
+        return false;
+    }
+
+    return true;
+}