Compile QML files ahead of time with qmlcachegen

qmlcachegen compiles bindings and functions to C++ as far as
QQmlJSAotCompiler can. It does respect "pragma Strict" and rejects the
file if it's violated. Furthermore, it sets up the logger to follow the
qt.qml.compiler.aot logging category. By default it's completely silent.

Compiling the examples with qmlcachegen exposes a bug in the type
resolver where it returns an invalid generic type. It should never do
that. Fix it by returning JSValue.

[ChangeLog][QtQml][Important Behavior Changes] QML bindings and
functions are now compiled to C++ by qmlcachegen, if possible. Use the
qt.qml.compiler.aot logging category to receive diagnostics about the
compilation.

Task-number: QTBUG-98305
Change-Id: I6953812c3fd20b68339617a5714fcbe16a384360
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 1987 insertions, 0 deletions

diff --git a/tests/auto/qml/qmlcppcodegen/data/TestCase.qml b/tests/auto/qml/qmlcppcodegen/data/TestCase.qml
new file mode 100644
index 0000000000..82e830ba88
--- /dev/null
+++ b/tests/auto/qml/qmlcppcodegen/data/TestCase.qml
@@ -0,0 +1,1987 @@
+/******************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt JavaScript to C++ compiler.
+**
+** $QT_BEGIN_LICENSE:COMM$
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+******************************************************************************/
+
+import QtQuick 2.0
+import QtQuick.Window 2.0 // used for qtest_verifyItem
+import QtTest 1.2
+import "testlogger.js" as TestLogger
+
+/*!
+    \qmltype TestCase
+    \inqmlmodule QtTest
+    \brief Represents a unit test case.
+    \since 4.8
+    \ingroup qtquicktest
+
+    \section1 Introduction to QML Test Cases
+
+    Test cases are written as JavaScript functions within a TestCase
+    type:
+
+    \code
+    import QtQuick 2.0
+    import QtTest 1.2
+
+    TestCase {
+        name: "MathTests"
+
+        function test_math() {
+            compare(2 + 2, 4, "2 + 2 = 4")
+        }
+
+        function test_fail() {
+            compare(2 + 2, 5, "2 + 2 = 5")
+        }
+    }
+    \endcode
+
+    Functions whose names start with "test_" are treated as test cases
+    to be executed.  The \l name property is used to prefix the functions
+    in the output:
+
+    \code
+    ********* Start testing of MathTests *********
+    Config: Using QTest library 4.7.2, Qt 4.7.2
+    PASS   : MathTests::initTestCase()
+    FAIL!  : MathTests::test_fail() 2 + 2 = 5
+       Actual (): 4
+       Expected (): 5
+       Loc: [/home/.../tst_math.qml(12)]
+    PASS   : MathTests::test_math()
+    PASS   : MathTests::cleanupTestCase()
+    Totals: 3 passed, 1 failed, 0 skipped
+    ********* Finished testing of MathTests *********
+    \endcode
+
+    Because of the way JavaScript properties work, the order in which the
+    test functions are found is unpredictable.  To assist with predictability,
+    the test framework will sort the functions on ascending order of name.
+    This can help when there are two tests that must be run in order.
+
+    Multiple TestCase types can be supplied.  The test program will exit
+    once they have all completed.  If a test case doesn't need to run
+    (because a precondition has failed), then \l optional can be set to true.
+
+    \section1 Data-driven Tests
+
+    Table data can be provided to a test using a function name that ends
+    with "_data". Alternatively, the \c init_data() function can be used
+    to provide default test data for all test functions in a TestCase type:
+
+
+    \code
+    import QtQuick 2.0
+    import QtTest 1.2
+
+    TestCase {
+        name: "DataTests"
+
+        function init_data() {
+          return [
+               {tag:"init_data_1", a:1, b:2, answer: 3},
+               {tag:"init_data_2", a:2, b:4, answer: 6}
+          ];
+        }
+
+        function test_table_data() {
+            return [
+                {tag: "2 + 2 = 4", a: 2, b: 2, answer: 4 },
+                {tag: "2 + 6 = 8", a: 2, b: 6, answer: 8 },
+            ]
+        }
+
+        function test_table(data) {
+            //data comes from test_table_data
+            compare(data.a + data.b, data.answer)
+        }
+
+        function test__default_table(data) {
+            //data comes from init_data
+            compare(data.a + data.b, data.answer)
+        }
+    }
+    \endcode
+
+    The test framework will iterate over all of the rows in the table
+    and pass each row to the test function.  As shown, the columns can be
+    extracted for use in the test.  The \c tag column is special - it is
+    printed by the test framework when a row fails, to help the reader
+    identify which case failed amongst a set of otherwise passing tests.
+
+    \section1 Benchmarks
+
+    Functions whose names start with "benchmark_" will be run multiple
+    times with the Qt benchmark framework, with an average timing value
+    reported for the runs.  This is equivalent to using the \c{QBENCHMARK}
+    macro in the C++ version of QTestLib.
+
+    \code
+    TestCase {
+        id: top
+        name: "CreateBenchmark"
+
+        function benchmark_create_component() {
+            var component = Qt.createComponent("item.qml")
+            var obj = component.createObject(top)
+            obj.destroy()
+            component.destroy()
+        }
+    }
+
+    RESULT : CreateBenchmark::benchmark_create_component:
+         0.23 msecs per iteration (total: 60, iterations: 256)
+    PASS   : CreateBenchmark::benchmark_create_component()
+    \endcode
+
+    To get the effect of the \c{QBENCHMARK_ONCE} macro, prefix the test
+    function name with "benchmark_once_".
+
+    \section1 Simulating Keyboard and Mouse Events
+
+    The keyPress(), keyRelease(), and keyClick() methods can be used
+    to simulate keyboard events within unit tests.  The events are
+    delivered to the currently focused QML item. You can pass either
+    a Qt.Key enum value or a latin1 char (string of length one)
+
+    \code
+    Rectangle {
+        width: 50; height: 50
+        focus: true
+
+        TestCase {
+            name: "KeyClick"
+            when: windowShown
+
+            function test_key_click() {
+                keyClick(Qt.Key_Left)
+                keyClick("a")
+                ...
+            }
+        }
+    }
+    \endcode
+
+    The mousePress(), mouseRelease(), mouseClick(), mouseDoubleClickSequence()
+    and mouseMove() methods can be used to simulate mouse events in a
+    similar fashion.
+
+    \b{Note:} keyboard and mouse events can only be delivered once the
+    main window has been shown.  Attempts to deliver events before then
+    will fail.  Use the \l when and windowShown properties to track
+    when the main window has been shown.
+
+    \section1 Managing Dynamically Created Test Objects
+
+    A typical pattern with QML tests is to
+    \l {Dynamic QML Object Creation from JavaScript}{dynamically create}
+    an item and then destroy it at the end of the test function:
+
+    \code
+    TestCase {
+        id: testCase
+        name: "MyTest"
+        when: windowShown
+
+        function test_click() {
+            var item = Qt.createQmlObject("import QtQuick 2.0; Item {}", testCase);
+            verify(item);
+
+            // Test item...
+
+            item.destroy();
+        }
+    }
+    \endcode
+
+    The problem with this pattern is that any failures in the test function
+    will cause the call to \c item.destroy() to be skipped, leaving the item
+    hanging around in the scene until the test case has finished. This can
+    result in interference with future tests; for example, by blocking input
+    events or producing unrelated debug output that makes it difficult to
+    follow the code's execution.
+
+    By calling \l createTemporaryQmlObject() instead, the object is guaranteed
+    to be destroyed at the end of the test function:
+
+    \code
+    TestCase {
+        id: testCase
+        name: "MyTest"
+        when: windowShown
+
+        function test_click() {
+            var item = createTemporaryQmlObject("import QtQuick 2.0; Item {}", testCase);
+            verify(item);
+
+            // Test item...
+
+            // Don't need to worry about destroying "item" here.
+        }
+    }
+    \endcode
+
+    For objects that are created via the \l {Component::}{createObject()} function
+    of \l Component, the \l createTemporaryObject() function can be used.
+
+    \sa {QtTest::SignalSpy}{SignalSpy}, {Qt Quick Test}
+*/
+
+
+Item {
+    id: testCase
+    visible: false
+    TestUtil {
+        id:util
+    }
+
+    /*!
+        \qmlproperty string TestCase::name
+
+        This property defines the name of the test case for result reporting.
+        The default value is an empty string.
+
+        \code
+        TestCase {
+            name: "ButtonTests"
+            ...
+        }
+        \endcode
+    */
+    property string name
+
+    /*!
+        \qmlproperty bool TestCase::when
+
+        This property should be set to true when the application wants
+        the test cases to run.  The default value is true.  In the following
+        example, a test is run when the user presses the mouse button:
+
+        \code
+        Rectangle {
+            id: foo
+            width: 640; height: 480
+            color: "cyan"
+
+            MouseArea {
+                id: area
+                anchors.fill: parent
+            }
+
+            property bool bar: true
+
+            TestCase {
+                name: "ItemTests"
+                when: area.pressed
+                id: test1
+
+                function test_bar() {
+                    verify(bar)
+                }
+            }
+        }
+        \endcode
+
+        The test application will exit once all \l TestCase types
+        have been triggered and have run.  The \l optional property can
+        be used to exclude a \l TestCase type.
+
+        \sa optional, completed
+    */
+    property bool when: true
+
+    /*!
+        \qmlproperty bool TestCase::completed
+
+        This property will be set to true once the test case has completed
+        execution.  Test cases are only executed once.  The initial value
+        is false.
+
+        \sa running, when
+    */
+    property bool completed: false
+
+    /*!
+        \qmlproperty bool TestCase::running
+
+        This property will be set to true while the test case is running.
+        The initial value is false, and the value will become false again
+        once the test case completes.
+
+        \sa completed, when
+    */
+    property bool running: false
+
+    /*!
+        \qmlproperty bool TestCase::optional
+
+        Multiple \l TestCase types can be supplied in a test application.
+        The application will exit once they have all completed.  If a test case
+        does not need to run (because a precondition has failed), then this
+        property can be set to true.  The default value is false.
+
+        \code
+        TestCase {
+            when: false
+            optional: true
+            function test_not_run() {
+                verify(false)
+            }
+        }
+        \endcode
+
+        \sa when, completed
+    */
+    property bool optional: false
+
+    /*!
+        \qmlproperty bool TestCase::windowShown
+
+        This property will be set to true after the QML viewing window has
+        been displayed.  Normally test cases run as soon as the test application
+        is loaded and before a window is displayed.  If the test case involves
+        visual types and behaviors, then it may need to be delayed until
+        after the window is shown.
+
+        \code
+        Button {
+            id: button
+            onClicked: text = "Clicked"
+            TestCase {
+                name: "ClickTest"
+                when: windowShown
+                function test_click() {
+                    button.clicked();
+                    compare(button.text, "Clicked");
+                }
+            }
+        }
+        \endcode
+    */
+    property bool windowShown: QTestRootObject.windowShown
+
+    // Internal private state.  Identifiers prefixed with qtest are reserved.
+    /*! \internal */
+    property bool qtest_prevWhen: true
+    /*! \internal */
+    property int qtest_testId: -1
+    /*! \internal */
+    property bool qtest_componentCompleted : false
+    /*! \internal */
+    property var qtest_testCaseResult
+    /*! \internal */
+    property var qtest_results: qtest_results_normal
+    /*! \internal */
+    TestResult { id: qtest_results_normal }
+    /*! \internal */
+    property var qtest_events: qtest_events_normal
+    TestEvent { id: qtest_events_normal }
+    /*! \internal */
+    property var qtest_temporaryObjects: []
+
+    /*!
+        \qmlmethod TestCase::fail(message = "")
+
+        Fails the current test case, with the optional \a message.
+        Similar to \c{QFAIL(message)} in C++.
+    */
+    function fail(msg) {
+        if (msg === undefined)
+            msg = "";
+        qtest_results.fail(msg, util.callerFile(), util.callerLine())
+        throw new Error("QtQuickTest::fail")
+    }
+
+    /*! \internal */
+    function qtest_fail(msg, frame) {
+        if (msg === undefined)
+            msg = "";
+        qtest_results.fail(msg, util.callerFile(frame), util.callerLine(frame))
+        throw new Error("QtQuickTest::fail")
+    }
+
+    /*!
+        \qmlmethod TestCase::verify(condition, message = "")
+
+        Fails the current test case if \a condition is false, and
+        displays the optional \a message.  Similar to \c{QVERIFY(condition)}
+        or \c{QVERIFY2(condition, message)} in C++.
+    */
+    function verify(cond, msg) {
+        if (arguments.length > 2)
+            qtest_fail("More than two arguments given to verify(). Did you mean tryVerify() or tryCompare()?", 1)
+
+        if (msg === undefined)
+            msg = "";
+        if (!qtest_results.verify(cond, msg, util.callerFile(), util.callerLine()))
+            throw new Error("QtQuickTest::fail")
+    }
+
+    /*!
+        \since 5.8
+        \qmlmethod TestCase::tryVerify(function, timeout = 5000, message = "")
+
+        Fails the current test case if \a function does not evaluate to
+        \c true before the specified \a timeout (in milliseconds) has elapsed.
+        The function is evaluated multiple times until the timeout is
+        reached. An optional \a message is displayed upon failure.
+
+        This function is intended for testing applications where a condition
+        changes based on asynchronous events. Use verify() for testing
+        synchronous condition changes, and tryCompare() for testing
+        asynchronous property changes.
+
+        For example, in the code below, it's not possible to use tryCompare(),
+        because the \c currentItem property might be \c null for a short period
+        of time:
+
+        \code
+        tryCompare(listView.currentItem, "text", "Hello");
+        \endcode
+
+        Instead, we can use tryVerify() to first check that \c currentItem
+        isn't \c null, and then use a regular compare afterwards:
+
+        \code
+        tryVerify(function(){ return listView.currentItem })
+        compare(listView.currentItem.text, "Hello")
+        \endcode
+
+        \sa verify(), compare(), tryCompare(), SignalSpy::wait()
+    */
+    function tryVerify(expressionFunction, timeout, msg) {
+        if (!expressionFunction || !(expressionFunction instanceof Function)) {
+            qtest_results.fail("First argument must be a function", util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        if (timeout && typeof(timeout) !== "number") {
+            qtest_results.fail("timeout argument must be a number", util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        if (msg && typeof(msg) !== "string") {
+            qtest_results.fail("message argument must be a string", util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        if (!timeout)
+            timeout = 5000
+
+        if (msg === undefined)
+            msg = "function returned false"
+
+        if (!expressionFunction())
+            wait(0)
+
+        var i = 0
+        while (i < timeout && !expressionFunction()) {
+            wait(50)
+            i += 50
+        }
+
+        if (!qtest_results.verify(expressionFunction(), msg, util.callerFile(), util.callerLine()))
+            throw new Error("QtQuickTest::fail")
+    }
+
+    /*!
+        \since 5.13
+        \qmlmethod bool TestCase::isPolishScheduled(object item)
+
+        Returns \c true if \l {QQuickItem::}{updatePolish()} has not been called
+        on \a item since the last call to \l {QQuickItem::}{polish()},
+        otherwise returns \c false.
+
+        When assigning values to properties in QML, any layouting the item
+        must do as a result of the assignment might not take effect immediately,
+        but can instead be postponed until the item is polished. For these cases,
+        you can use this function to ensure that the item has been polished
+        before the execution of the test continues. For example:
+
+        \code
+            verify(isPolishScheduled(item))
+            verify(waitForItemPolished(item))
+        \endcode
+
+        Without the call to \c isPolishScheduled() above, the
+        call to \c waitForItemPolished() might see that no polish
+        was scheduled and therefore pass instantly, assuming that
+        the item had already been polished. This function
+        makes it obvious why an item wasn't polished and allows tests to
+        fail early under such circumstances.
+
+        \sa waitForItemPolished(), QQuickItem::polish(), QQuickItem::updatePolish()
+    */
+    function isPolishScheduled(item) {
+        if (!item || typeof item !== "object") {
+            qtest_results.fail("Argument must be a valid Item; actual type is " + typeof item,
+                util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        return qtest_results.isPolishScheduled(item)
+    }
+
+    /*!
+        \since 5.13
+        \qmlmethod bool waitForItemPolished(object item, int timeout = 5000)
+
+        Waits for \a timeout milliseconds or until
+        \l {QQuickItem::}{updatePolish()} has been called on \a item.
+
+        Returns \c true if \c updatePolish() was called on \a item within
+        \a timeout milliseconds, otherwise returns \c false.
+
+        \sa isPolishScheduled(), QQuickItem::polish(), QQuickItem::updatePolish()
+    */
+    function waitForItemPolished(item, timeout) {
+        if (!item || typeof item !== "object") {
+            qtest_results.fail("First argument must be a valid Item; actual type is " + typeof item,
+                util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        if (timeout !== undefined && typeof(timeout) != "number") {
+            qtest_results.fail("Second argument must be a number; actual type is " + typeof timeout,
+                util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+
+        if (!timeout)
+            timeout = 5000
+
+        return qtest_results.waitForItemPolished(item, timeout)
+    }
+
+    /*!
+        \since 5.9
+        \qmlmethod object TestCase::createTemporaryQmlObject(string qml, object parent, string filePath)
+
+        This function dynamically creates a QML object from the given \a qml
+        string with the specified \a parent. The returned object will be
+        destroyed (if it was not already) after \l cleanup() has finished
+        executing, meaning that objects created with this function are
+        guaranteed to be destroyed after each test, regardless of whether or
+        not the tests fail.
+
+        If there was an error while creating the object, \c null will be
+        returned.
+
+        If \a filePath is specified, it will be used for error reporting for
+        the created object.
+
+        This function calls
+        \l {QtQml::Qt::createQmlObject()}{Qt.createQmlObject()} internally.
+
+        \sa {Managing Dynamically Created Test Objects}
+    */
+    function createTemporaryQmlObject(qml, parent, filePath) {
+        if (typeof qml !== "string") {
+            qtest_results.fail("First argument must be a string of QML; actual type is " + typeof qml,
+                util.callerFile(), util.callerLine());
+            throw new Error("QtQuickTest::fail");
+        }
+
+        if (!parent || typeof parent !== "object") {
+            qtest_results.fail("Second argument must be a valid parent object; actual type is " + typeof parent,
+                util.callerFile(), util.callerLine());
+            throw new Error("QtQuickTest::fail");
+        }
+
+        if (filePath !== undefined && typeof filePath !== "string") {
+            qtest_results.fail("Third argument must be a file path string; actual type is " + typeof filePath,
+                util.callerFile(), util.callerLine());
+            throw new Error("QtQuickTest::fail");
+        }
+
+        var object = Qt.createQmlObject(qml, parent, filePath);
+        qtest_temporaryObjects.push(object);
+        return object;
+    }
+
+    /*!
+        \since 5.9
+        \qmlmethod object TestCase::createTemporaryObject(Component component, object parent, object properties)
+
+        This function dynamically creates a QML object from the given
+        \a component with the specified optional \a parent and \a properties.
+        The returned object will be destroyed (if it was not already) after
+        \l cleanup() has finished executing, meaning that objects created with
+        this function are guaranteed to be destroyed after each test,
+        regardless of whether or not the tests fail.
+
+        If there was an error while creating the object, \c null will be
+        returned.
+
+        This function calls
+        \l {QtQml::Component::createObject()}{component.createObject()}
+        internally.
+
+        \sa {Managing Dynamically Created Test Objects}
+    */
+    function createTemporaryObject(component, parent, properties) {
+        if (typeof component !== "object") {
+            qtest_results.fail("First argument must be a Component; actual type is " + typeof component,
+                util.callerFile(), util.callerLine());
+            throw new Error("QtQuickTest::fail");
+        }
+
+        if (properties && typeof properties !== "object") {
+            qtest_results.fail("Third argument must be an object; actual type is " + typeof properties,
+                util.callerFile(), util.callerLine());
+            throw new Error("QtQuickTest::fail");
+        }
+
+        var object = component.createObject(parent, properties ? properties : ({}));
+        qtest_temporaryObjects.push(object);
+        return object;
+    }
+
+    /*!
+        \internal
+
+        Destroys all temporary objects that still exist.
+    */
+    function qtest_destroyTemporaryObjects() {
+        for (var i = 0; i < qtest_temporaryObjects.length; ++i) {
+            var temporaryObject = qtest_temporaryObjects[i];
+            // ### the typeof check can be removed when QTBUG-57749 is fixed
+            if (temporaryObject && typeof temporaryObject.destroy === "function")
+                temporaryObject.destroy();
+        }
+        qtest_temporaryObjects = [];
+    }
+
+    /*! \internal */
+    // Determine what is o.
+    // Discussions and reference: http://philrathe.com/articles/equiv
+    // Test suites: http://philrathe.com/tests/equiv
+    // Author: Philippe Rathé <prathe@gmail.com>
+    function qtest_typeof(o) {
+        if (typeof o === "undefined") {
+            return "undefined";
+
+        // consider: typeof null === object
+        } else if (o === null) {
+            return "null";
+
+        } else if (o.constructor === String) {
+            return "string";
+
+        } else if (o.constructor === Boolean) {
+            return "boolean";
+
+        } else if (o.constructor === Number) {
+
+            if (isNaN(o)) {
+                return "nan";
+            } else {
+                return "number";
+            }
+        // consider: typeof [] === object
+        } else if (o instanceof Array) {
+            return "array";
+
+        // consider: typeof new Date() === object
+        } else if (o instanceof Date) {
+            return "date";
+
+        // consider: /./ instanceof Object;
+        //           /./ instanceof RegExp;
+        //          typeof /./ === "function"; // => false in IE and Opera,
+        //                                          true in FF and Safari
+        } else if (o instanceof RegExp) {
+            return "regexp";
+
+        } else if (typeof o === "object") {
+            if ("mapFromItem" in o && "mapToItem" in o) {
+                return "declarativeitem";  // @todo improve detection of declarative items
+            } else if ("x" in o && "y" in o && "z" in o) {
+                return "vector3d"; // Qt 3D vector
+            }
+            return "object";
+        } else if (o instanceof Function) {
+            return "function";
+        } else {
+            return undefined;
+        }
+    }
+
+    /*! \internal */
+    // Test for equality
+    // Large parts contain sources from QUnit or http://philrathe.com
+    // Discussions and reference: http://philrathe.com/articles/equiv
+    // Test suites: http://philrathe.com/tests/equiv
+    // Author: Philippe Rathé <prathe@gmail.com>
+    function qtest_compareInternal(act, exp) {
+        var success = false;
+        if (act === exp) {
+            success = true; // catch the most you can
+        } else if (act === null || exp === null || typeof act === "undefined" || typeof exp === "undefined") {
+            success = false; // don't lose time with error prone cases
+        } else {
+            var typeExp = qtest_typeof(exp), typeAct = qtest_typeof(act)
+            if (typeExp !== typeAct) {
+                // allow object vs string comparison (e.g. for colors)
+                // else break on different types
+                if ((typeExp === "string" && (typeAct === "object") || typeAct == "declarativeitem")
+                 || ((typeExp === "object" || typeExp == "declarativeitem") && typeAct === "string")) {
+                    success = (act == exp)
+                }
+            } else if (typeExp === "string" || typeExp === "boolean" ||
+                       typeExp === "null" || typeExp === "undefined") {
+                if (exp instanceof act.constructor || act instanceof exp.constructor) {
+                    // to catch short annotaion VS 'new' annotation of act declaration
+                    // e.g. var i = 1;
+                    //      var j = new Number(1);
+                    success = (act == exp)
+                } else {
+                    success = (act === exp)
+                }
+            } else if (typeExp === "nan") {
+                success = isNaN(act);
+            } else if (typeExp === "number") {
+                // Use act fuzzy compare if the two values are floats
+                if (Math.abs(act - exp) <= 0.00001) {
+                    success = true
+                }
+            } else if (typeExp === "array") {
+                success = qtest_compareInternalArrays(act, exp)
+            } else if (typeExp === "object") {
+                success = qtest_compareInternalObjects(act, exp)
+            } else if (typeExp === "declarativeitem") {
+                success = qtest_compareInternalObjects(act, exp) // @todo improve comparison of declarative items
+            } else if (typeExp === "vector3d") {
+                success = (Math.abs(act.x - exp.x) <= 0.00001 &&
+                           Math.abs(act.y - exp.y) <= 0.00001 &&
+                           Math.abs(act.z - exp.z) <= 0.00001)
+            } else if (typeExp === "date") {
+                success = (act.valueOf() === exp.valueOf())
+            } else if (typeExp === "regexp") {
+                success = (act.source === exp.source && // the regex itself
+                           act.global === exp.global && // and its modifers (gmi) ...
+                           act.ignoreCase === exp.ignoreCase &&
+                           act.multiline === exp.multiline)
+            }
+        }
+        return success
+    }
+
+    /*! \internal */
+    function qtest_compareInternalObjects(act, exp) {
+        var i;
+        var eq = true; // unless we can proove it
+        var aProperties = [], bProperties = []; // collection of strings
+
+        // comparing constructors is more strict than using instanceof
+        if (act.constructor !== exp.constructor) {
+            return false;
+        }
+
+        for (i in act) { // be strict: don't ensures hasOwnProperty and go deep
+            aProperties.push(i); // collect act's properties
+            if (!qtest_compareInternal(act[i], exp[i])) {
+                eq = false;
+                break;
+            }
+        }
+
+        for (i in exp) {
+            bProperties.push(i); // collect exp's properties
+        }
+
+        if (aProperties.length == 0 && bProperties.length == 0) { // at least a special case for QUrl
+            return eq && (JSON.stringify(act) == JSON.stringify(exp));
+        }
+
+        // Ensures identical properties name
+        return eq && qtest_compareInternal(aProperties.sort(), bProperties.sort());
+
+    }
+
+    /*! \internal */
+    function qtest_compareInternalArrays(actual, expected) {
+        if (actual.length != expected.length) {
+            return false
+        }
+
+        for (var i = 0, len = actual.length; i < len; i++) {
+            if (!qtest_compareInternal(actual[i], expected[i])) {
+                return false
+            }
+        }
+
+        return true
+    }
+
+    /*!
+        \qmlmethod TestCase::compare(actual, expected, message = "")
+
+        Fails the current test case if \a actual is not the same as
+        \a expected, and displays the optional \a message.  Similar
+        to \c{QCOMPARE(actual, expected)} in C++.
+
+        \sa tryCompare(), fuzzyCompare
+    */
+    function compare(actual, expected, msg) {
+        var act = qtest_results.stringify(actual)
+        var exp = qtest_results.stringify(expected)
+
+        var success = qtest_compareInternal(actual, expected)
+        if (msg === undefined) {
+            if (success)
+                msg = "COMPARE()"
+            else
+                msg = "Compared values are not the same"
+        }
+        if (!qtest_results.compare(success, msg, act, exp, util.callerFile(), util.callerLine())) {
+            throw new Error("QtQuickTest::fail")
+        }
+    }
+
+    /*!
+        \qmlmethod TestCase::fuzzyCompare(actual, expected, delta, message = "")
+
+        Fails the current test case if the difference betwen \a actual and \a expected
+        is greater than \a delta, and displays the optional \a message.  Similar
+        to \c{qFuzzyCompare(actual, expected)} in C++ but with a required \a delta value.
+
+        This function can also be used for color comparisons if both the \a actual and
+        \a expected values can be converted into color values. If any of the differences
+        for RGBA channel values are greater than \a delta, the test fails.
+
+        \sa tryCompare(), compare()
+    */
+    function fuzzyCompare(actual, expected, delta, msg) {
+        if (delta === undefined)
+            qtest_fail("A delta value is required for fuzzyCompare", 2)
+
+        var success = qtest_results.fuzzyCompare(actual, expected, delta)
+        if (msg === undefined) {
+            if (success)
+                msg = "FUZZYCOMPARE()"
+            else
+                msg = "Compared values are not the same with delta(" + delta + ")"
+        }
+
+        if (!qtest_results.compare(success, msg, actual, expected, util.callerFile(), util.callerLine())) {
+            throw new Error("QtQuickTest::fail")
+        }
+    }
+
+    /*!
+        \qmlmethod object TestCase::grabImage(item)
+
+        Returns a snapshot image object of the given \a item.
+
+        The returned image object has the following properties:
+        \list
+        \li width Returns the width of the underlying image (since 5.10)
+        \li height Returns the height of the underlying image (since 5.10)
+        \li size Returns the size of the underlying image (since 5.10)
+        \endlist
+
+        Additionally, the returned image object has the following methods:
+        \list
+        \li \c {red(x, y)} Returns the red channel value of the pixel at \e x, \e y position
+        \li \c {green(x, y)} Returns the green channel value of the pixel at \e x, \e y position
+        \li \c {blue(x, y)} Returns the blue channel value of the pixel at \e x, \e y position
+        \li \c {alpha(x, y)} Returns the alpha channel value of the pixel at \e x, \e y position
+        \li \c {pixel(x, y)} Returns the color value of the pixel at \e x, \e y position
+        \li \c {equals(image)} Returns \c true if this image is identical to \e image -
+            see \l QImage::operator== (since 5.6)
+
+        For example:
+
+        \code
+        var image = grabImage(rect);
+        compare(image.red(10, 10), 255);
+        compare(image.pixel(20, 20), Qt.rgba(255, 0, 0, 255));
+
+        rect.width += 10;
+        var newImage = grabImage(rect);
+        verify(!newImage.equals(image));
+        \endcode
+
+        \li \c {save(path)} Saves the image to the given \e path. If the image cannot
+        be saved, an exception will be thrown. (since 5.10)
+
+        This can be useful to perform postmortem analysis on failing tests, for
+        example:
+
+        \code
+        var image = grabImage(rect);
+        try {
+            compare(image.width, 100);
+        } catch (ex) {
+            image.save("debug.png");
+            throw ex;
+        }
+        \endcode
+
+        \endlist
+    */
+    function grabImage(item) {
+        return qtest_results.grabImage(item);
+    }
+
+    /*!
+        \since 5.4
+        \qmlmethod QtObject TestCase::findChild(parent, objectName)
+
+        Returns the first child of \a parent with \a objectName, or \c null if
+        no such item exists. Both visual and non-visual children are searched
+        recursively, with visual children being searched first.
+
+        \code
+        compare(findChild(item, "childObject"), expectedChildObject);
+        \endcode
+    */
+    function findChild(parent, objectName) {
+        // First, search the visual item hierarchy.
+        var child = qtest_findVisualChild(parent, objectName);
+        if (child)
+            return child;
+
+        // If it's not a visual child, it might be a QObject child.
+        return qtest_results.findChild(parent, objectName);
+    }
+
+    /*! \internal */
+    function qtest_findVisualChild(parent, objectName) {
+        if (!parent || parent.children === undefined)
+            return null;
+
+        for (var i = 0; i < parent.children.length; ++i) {
+            // Is this direct child of ours the child we're after?
+            var child = parent.children[i];
+            if (child.objectName === objectName)
+                return child;
+        }
+
+        for (i = 0; i < parent.children.length; ++i) {
+            // Try the direct child's children.
+            child = qtest_findVisualChild(parent.children[i], objectName);
+            if (child)
+                return child;
+        }
+        return null;
+    }
+
+    /*!
+        \qmlmethod TestCase::tryCompare(obj, property, expected, timeout = 5000, message = "")
+
+        Fails the current test case if the specified \a property on \a obj
+        is not the same as \a expected, and displays the optional \a message.
+        The test will be retried multiple times until the
+        \a timeout (in milliseconds) is reached.
+
+        This function is intended for testing applications where a property
+        changes value based on asynchronous events.  Use compare() for testing
+        synchronous property changes.
+
+        \code
+        tryCompare(img, "status", BorderImage.Ready)
+        compare(img.width, 120)
+        compare(img.height, 120)
+        compare(img.horizontalTileMode, BorderImage.Stretch)
+        compare(img.verticalTileMode, BorderImage.Stretch)
+        \endcode
+
+        SignalSpy::wait() provides an alternative method to wait for a
+        signal to be emitted.
+
+        \sa compare(), SignalSpy::wait()
+    */
+    function tryCompare(obj, prop, value, timeout, msg) {
+        if (arguments.length == 1 || (typeof(prop) != "string" && typeof(prop) != "number")) {
+            qtest_results.fail("A property name as string or index is required for tryCompare",
+                        util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+        if (arguments.length == 2) {
+            qtest_results.fail("A value is required for tryCompare",
+                        util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+        if (timeout !== undefined && typeof(timeout) != "number") {
+            qtest_results.fail("timeout should be a number",
+                        util.callerFile(), util.callerLine())
+            throw new Error("QtQuickTest::fail")
+        }
+        if (!timeout)
+            timeout = 5000
+        if (msg === undefined)
+            msg = "property " + prop
+        if (!qtest_compareInternal(obj[prop], value))
+            wait(0)
+        var i = 0
+        while (i < timeout && !qtest_compareInternal(obj[prop], value)) {
+            wait(50)
+            i += 50
+        }
+        var actual = obj[prop]
+        var act = qtest_results.stringify(actual)
+        var exp = qtest_results.stringify(value)
+        var success = qtest_compareInternal(actual, value)
+        if (!qtest_results.compare(success, msg, act, exp, util.callerFile(), util.callerLine()))
+            throw new Error("QtQuickTest::fail")
+    }
+
+    /*!
+        \qmlmethod TestCase::skip(message = "")
+
+        Skips the current test case and prints the optional \a message.
+        If this is a data-driven test, then only the current row is skipped.
+        Similar to \c{QSKIP(message)} in C++.
+    */
+    function skip(msg) {
+        if (msg === undefined)
+            msg = ""
+        qtest_results.skip(msg, util.callerFile(), util.callerLine())
+        throw new Error("QtQuickTest::skip")
+    }
+
+    /*!
+        \qmlmethod TestCase::expectFail(tag, message)
+
+        In a data-driven test, marks the row associated with \a tag as
+        expected to fail.  When the fail occurs, display the \a message,
+        abort the test, and mark the test as passing.  Similar to
+        \c{QEXPECT_FAIL(tag, message, Abort)} in C++.
+
+        If the test is not data-driven, then \a tag must be set to
+        an empty string.
+
+        \sa expectFailContinue()
+    */
+    function expectFail(tag, msg) {
+        if (tag === undefined) {
+            warn("tag argument missing from expectFail()")
+            tag = ""
+        }
+        if (msg === undefined) {
+            warn("message argument missing from expectFail()")
+            msg = ""
+        }
+        if (!qtest_results.expectFail(tag, msg, util.callerFile(), util.callerLine()))
+            throw new Error("QtQuickTest::expectFail")
+    }
+
+    /*!
+        \qmlmethod TestCase::expectFailContinue(tag, message)
+
+        In a data-driven test, marks the row associated with \a tag as
+        expected to fail.  When the fail occurs, display the \a message,
+        and then continue the test.  Similar to
+        \c{QEXPECT_FAIL(tag, message, Continue)} in C++.
+
+        If the test is not data-driven, then \a tag must be set to
+        an empty string.
+
+        \sa expectFail()
+    */
+    function expectFailContinue(tag, msg) {
+        if (tag === undefined) {
+            warn("tag argument missing from expectFailContinue()")
+            tag = ""
+        }
+        if (msg === undefined) {
+            warn("message argument missing from expectFailContinue()")
+            msg = ""
+        }
+        if (!qtest_results.expectFailContinue(tag, msg, util.callerFile(), util.callerLine()))
+            throw new Error("QtQuickTest::expectFail")
+    }
+
+    /*!
+        \qmlmethod TestCase::warn(message)
+
+        Prints \a message as a warning message.  Similar to
+        \c{QWARN(message)} in C++.
+
+        \sa ignoreWarning()
+    */
+    function warn(msg) {
+        if (msg === undefined)
+            msg = ""
+        qtest_results.warn(msg, util.callerFile(), util.callerLine());
+    }
+
+    /*!
+        \qmlmethod TestCase::ignoreWarning(message)
+
+        Marks \a message as an ignored warning message.  When it occurs,
+        the warning will not be printed and the test passes.  If the message
+        does not occur, then the test will fail.  Similar to
+        \c{QTest::ignoreMessage(QtWarningMsg, message)} in C++.
+
+        Since Qt 5.12, \a message can be either a string, or a regular
+        expression providing a pattern of messages to ignore.
+
+        For example, the following snippet will ignore a string warning message:
+        \qml
+        ignoreWarning("Something sort of bad happened")
+        \endqml
+
+        And the following snippet will ignore a regular expression matching a
+        number of possible warning messages:
+        \qml
+        ignoreWarning(new RegExp("[0-9]+ bad things happened"))
+        \endqml
+
+        \note Despite being a JavaScript RegExp object, it will not be
+        interpreted as such; instead, the pattern will be passed to
+        \l QRegularExpression.
+
+        \sa warn()
+    */
+    function ignoreWarning(msg) {
+        if (msg === undefined)
+            msg = ""
+        qtest_results.ignoreWarning(msg)
+    }
+
+    /*!
+        \qmlmethod TestCase::wait(ms)
+
+        Waits for \a ms milliseconds while processing Qt events.
+
+        \sa sleep(), waitForRendering()
+    */
+    function wait(ms) {
+        qtest_results.wait(ms)
+    }
+
+    /*!
+        \qmlmethod TestCase::waitForRendering(item, timeout = 5000)
+
+        Waits for \a timeout milliseconds or until the \a item is rendered by the renderer.
+        Returns true if \c item is rendered in \a timeout milliseconds, otherwise returns false.
+        The default \a timeout value is 5000.
+
+        \sa sleep(), wait()
+    */
+    function waitForRendering(item, timeout) {
+        if (timeout === undefined)
+            timeout = 5000
+        if (!qtest_verifyItem(item, "waitForRendering"))
+            return
+        return qtest_results.waitForRendering(item, timeout)
+    }
+
+    /*!
+        \qmlmethod TestCase::sleep(ms)
+
+        Sleeps for \a ms milliseconds without processing Qt events.
+
+        \sa wait(), waitForRendering()
+    */
+    function sleep(ms) {
+        qtest_results.sleep(ms)
+    }
+
+    /*!
+        \qmlmethod TestCase::keyPress(key, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates pressing a \a key with optional \a modifiers on the currently
+        focused item.  If \a delay is larger than 0, the test will wait for
+        \a delay milliseconds.
+
+        The event will be sent to the TestCase window or, in case of multiple windows,
+        to the current active window. See \l QGuiApplication::focusWindow() for more details.
+
+        \b{Note:} At some point you should release the key using keyRelease().
+
+        \sa keyRelease(), keyClick()
+    */
+    function keyPress(key, modifiers, delay) {
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (typeof(key) == "string" && key.length == 1) {
+            if (!qtest_events.keyPressChar(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        } else {
+            if (!qtest_events.keyPress(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        }
+    }
+
+    /*!
+        \qmlmethod TestCase::keyRelease(key, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates releasing a \a key with optional \a modifiers on the currently
+        focused item.  If \a delay is larger than 0, the test will wait for
+        \a delay milliseconds.
+
+        The event will be sent to the TestCase window or, in case of multiple windows,
+        to the current active window. See \l QGuiApplication::focusWindow() for more details.
+
+        \sa keyPress(), keyClick()
+    */
+    function keyRelease(key, modifiers, delay) {
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (typeof(key) == "string" && key.length == 1) {
+            if (!qtest_events.keyReleaseChar(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        } else {
+            if (!qtest_events.keyRelease(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        }
+    }
+
+    /*!
+        \qmlmethod TestCase::keyClick(key, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates clicking of \a key with optional \a modifiers on the currently
+        focused item.  If \a delay is larger than 0, the test will wait for
+        \a delay milliseconds.
+
+        The event will be sent to the TestCase window or, in case of multiple windows,
+        to the current active window. See \l QGuiApplication::focusWindow() for more details.
+
+        \sa keyPress(), keyRelease()
+    */
+    function keyClick(key, modifiers, delay) {
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (typeof(key) == "string" && key.length == 1) {
+            if (!qtest_events.keyClickChar(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        } else {
+            if (!qtest_events.keyClick(key, modifiers, delay))
+                qtest_fail("window not shown", 2)
+        }
+    }
+
+    /*!
+        \since 5.10
+        \qmlmethod TestCase::keySequence(keySequence)
+
+        Simulates typing of \a keySequence. The key sequence can be set
+        to one of the \l{QKeySequence::StandardKey}{standard keyboard shortcuts}, or
+        it can be described with a string containing a sequence of up to four key
+        presses.
+
+        Each event shall be sent to the TestCase window or, in case of multiple windows,
+        to the current active window. See \l QGuiApplication::focusWindow() for more details.
+
+        \sa keyPress(), keyRelease(), {GNU Emacs Style Key Sequences},
+        {QtQuick::Shortcut::sequence}{Shortcut.sequence}
+    */
+    function keySequence(keySequence) {
+        if (!qtest_events.keySequence(keySequence))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mousePress(item, x = item.width / 2, y = item.height / 2, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates pressing a mouse \a button with optional \a modifiers
+        on an \a item.  The position is defined by \a x and \a y.
+        If \a x or \a y are not defined the position will be the center of \a item.
+        If \a delay is specified, the test will wait for the specified amount of
+        milliseconds before the press.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        \sa mouseRelease(), mouseClick(), mouseDoubleClickSequence(), mouseMove(), mouseDrag(), mouseWheel()
+    */
+    function mousePress(item, x, y, button, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mousePress"))
+            return
+
+        if (button === undefined)
+            button = Qt.LeftButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (x === undefined)
+            x = item.width / 2
+        if (y === undefined)
+            y = item.height / 2
+        if (!qtest_events.mousePress(item, x, y, button, modifiers, delay))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseRelease(item, x = item.width / 2, y = item.height / 2, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates releasing a mouse \a button with optional \a modifiers
+        on an \a item.  The position of the release is defined by \a x and \a y.
+        If \a x or \a y are not defined the position will be the center of \a item.
+        If \a delay is specified, the test will wait for the specified amount of
+        milliseconds before releasing the button.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        \sa mousePress(), mouseClick(), mouseDoubleClickSequence(), mouseMove(), mouseDrag(), mouseWheel()
+    */
+    function mouseRelease(item, x, y, button, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mouseRelease"))
+            return
+
+        if (button === undefined)
+            button = Qt.LeftButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (x === undefined)
+            x = item.width / 2
+        if (y === undefined)
+            y = item.height / 2
+        if (!qtest_events.mouseRelease(item, x, y, button, modifiers, delay))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseDrag(item, x, y, dx, dy, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates dragging the mouse on an \a item with \a button pressed and optional \a modifiers
+        The initial drag position is defined by \a x and \a y,
+        and drag distance is defined by \a dx and \a dy. If \a delay is specified,
+        the test will wait for the specified amount of milliseconds before releasing the button.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        \sa mousePress(), mouseClick(), mouseDoubleClickSequence(), mouseMove(), mouseRelease(), mouseWheel()
+    */
+    function mouseDrag(item, x, y, dx, dy, button, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mouseDrag"))
+            return
+
+        if (item.x === undefined || item.y === undefined)
+            return
+        if (button === undefined)
+            button = Qt.LeftButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        var moveDelay = Math.max(1, delay === -1 ? qtest_events.defaultMouseDelay : delay)
+
+        // Divide dx and dy to have intermediate mouseMove while dragging
+        // Fractions of dx/dy need be superior to the dragThreshold
+        // to make the drag works though
+        var intermediateDx = Math.round(dx/3)
+        if (Math.abs(intermediateDx) < (util.dragThreshold + 1))
+            intermediateDx = 0
+        var intermediateDy = Math.round(dy/3)
+        if (Math.abs(intermediateDy) < (util.dragThreshold + 1))
+            intermediateDy = 0
+
+        mousePress(item, x, y, button, modifiers, delay)
+
+        // Trigger dragging by dragging past the drag threshold, but making sure to only drag
+        // along a certain axis if a distance greater than zero was given for that axis.
+        var dragTriggerXDistance = dx > 0 ? (util.dragThreshold + 1) : 0
+        var dragTriggerYDistance = dy > 0 ? (util.dragThreshold + 1) : 0
+        mouseMove(item, x + dragTriggerXDistance, y + dragTriggerYDistance, moveDelay, button)
+        if (intermediateDx !== 0 || intermediateDy !== 0) {
+            mouseMove(item, x + intermediateDx, y + intermediateDy, moveDelay, button)
+            mouseMove(item, x + 2*intermediateDx, y + 2*intermediateDy, moveDelay, button)
+        }
+        mouseMove(item, x + dx, y + dy, moveDelay, button)
+        mouseRelease(item, x + dx, y + dy, button, modifiers, delay)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseClick(item, x = item.width / 2, y = item.height / 2, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates clicking a mouse \a button with optional \a modifiers
+        on an \a item.  The position of the click is defined by \a x and \a y.
+        If \a x and \a y are not defined the position will be the center of \a item.
+        If \a delay is specified, the test will wait for the specified amount of
+        milliseconds before pressing and before releasing the button.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        \sa mousePress(), mouseRelease(), mouseDoubleClickSequence(), mouseMove(), mouseDrag(), mouseWheel()
+    */
+    function mouseClick(item, x, y, button, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mouseClick"))
+            return
+
+        if (button === undefined)
+            button = Qt.LeftButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (x === undefined)
+            x = item.width / 2
+        if (y === undefined)
+            y = item.height / 2
+        if (!qtest_events.mouseClick(item, x, y, button, modifiers, delay))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseDoubleClickSequence(item, x = item.width / 2, y = item.height / 2, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates the full sequence of events generated by double-clicking a mouse
+        \a button with optional \a modifiers on an \a item.
+
+        This method reproduces the sequence of mouse events generated when a user makes
+        a double click: Press-Release-Press-DoubleClick-Release.
+
+        The position of the click is defined by \a x and \a y.
+        If \a x and \a y are not defined the position will be the center of \a item.
+        If \a delay is specified, the test will wait for the specified amount of
+        milliseconds before pressing and before releasing the button.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        This QML method was introduced in Qt 5.5.
+
+        \sa mousePress(), mouseRelease(), mouseClick(), mouseMove(), mouseDrag(), mouseWheel()
+    */
+    function mouseDoubleClickSequence(item, x, y, button, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mouseDoubleClickSequence"))
+            return
+
+        if (button === undefined)
+            button = Qt.LeftButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (delay == undefined)
+            delay = -1
+        if (x === undefined)
+            x = item.width / 2
+        if (y === undefined)
+            y = item.height / 2
+        if (!qtest_events.mouseDoubleClickSequence(item, x, y, button, modifiers, delay))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseMove(item, x = item.width / 2, y = item.height / 2, delay = -1, buttons = Qt.NoButton)
+
+        Moves the mouse pointer to the position given by \a x and \a y within
+        \a item, while holding \a buttons if given. Since Qt 6.0, if \a x and
+        \a y are not defined, the position will be the center of \a item.
+
+        If a \a delay (in milliseconds) is given, the test will wait before
+        moving the mouse pointer.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        \sa mousePress(), mouseRelease(), mouseClick(), mouseDoubleClickSequence(), mouseDrag(), mouseWheel()
+    */
+    function mouseMove(item, x, y, delay, buttons) {
+        if (!qtest_verifyItem(item, "mouseMove"))
+            return
+
+        if (delay == undefined)
+            delay = -1
+        if (buttons == undefined)
+            buttons = Qt.NoButton
+        if (x === undefined)
+            x = item.width / 2
+        if (y === undefined)
+            y = item.height / 2
+        if (!qtest_events.mouseMove(item, x, y, delay, buttons))
+            qtest_fail("window not shown", 2)
+    }
+
+    /*!
+        \qmlmethod TestCase::mouseWheel(item, x, y, xDelta, yDelta, button = Qt.LeftButton, modifiers = Qt.NoModifier, delay = -1)
+
+        Simulates rotating the mouse wheel on an \a item with \a button pressed and optional \a modifiers.
+        The position of the wheel event is defined by \a x and \a y.
+        If \a delay is specified, the test will wait for the specified amount of milliseconds before releasing the button.
+
+        The position given by \a x and \a y is transformed from the co-ordinate
+        system of \a item into window co-ordinates and then delivered.
+        If \a item is obscured by another item, or a child of \a item occupies
+        that position, then the event will be delivered to the other item instead.
+
+        The \a xDelta and \a yDelta contain the wheel rotation distance in eighths of a degree. see \l QWheelEvent::angleDelta() for more details.
+
+        \sa mousePress(), mouseClick(), mouseDoubleClickSequence(), mouseMove(), mouseRelease(), mouseDrag(), QWheelEvent::angleDelta()
+    */
+    function mouseWheel(item, x, y, xDelta, yDelta, buttons, modifiers, delay) {
+        if (!qtest_verifyItem(item, "mouseWheel"))
+            return
+
+        if (delay == undefined)
+            delay = -1
+        if (buttons == undefined)
+            buttons = Qt.NoButton
+        if (modifiers === undefined)
+            modifiers = Qt.NoModifier
+        if (xDelta == undefined)
+            xDelta = 0
+        if (yDelta == undefined)
+            yDelta = 0
+        if (!qtest_events.mouseWheel(item, x, y, buttons, modifiers, xDelta, yDelta, delay))
+            qtest_fail("window not shown", 2)
+   }
+
+    /*!
+        \qmlmethod TouchEventSequence TestCase::touchEvent(object item)
+
+        \since 5.9
+
+        Begins a sequence of touch events through a simulated touchscreen (QPointingDevice).
+        Events are delivered to the window containing \a item.
+
+        The returned object is used to enumerate events to be delivered through a single
+        QTouchEvent. Touches are delivered to the window containing the TestCase unless
+        otherwise specified.
+
+        \code
+        Rectangle {
+            width: 640; height: 480
+
+            MultiPointTouchArea {
+                id: area
+                anchors.fill: parent
+
+                property bool touched: false
+
+                onPressed: touched = true
+            }
+
+            TestCase {
+                name: "ItemTests"
+                when: windowShown
+                id: test1
+
+                function test_touch() {
+                    var touch = touchEvent(area);
+                    touch.press(0, area, 10, 10);
+                    touch.commit();
+                    verify(area.touched);
+                }
+            }
+        }
+        \endcode
+
+        \sa TouchEventSequence::press(), TouchEventSequence::move(), TouchEventSequence::release(), TouchEventSequence::stationary(), TouchEventSequence::commit(), QInputDevice::DeviceType
+    */
+
+    function touchEvent(item) {
+        if (!qtest_verifyItem(item, "touchEvent"))
+            return
+
+        return {
+            _defaultItem: item,
+            _sequence: qtest_events.touchEvent(item),
+
+            press: function (id, target, x, y) {
+                if (!target)
+                    target = this._defaultItem;
+                if (id === undefined)
+                    qtest_fail("No id given to TouchEventSequence::press", 1);
+                if (x === undefined)
+                    x = target.width / 2;
+                if (y === undefined)
+                    y = target.height / 2;
+                this._sequence.press(id, target, x, y);
+                return this;
+            },
+
+            move: function (id, target, x, y) {
+                if (!target)
+                    target = this._defaultItem;
+                if (id === undefined)
+                    qtest_fail("No id given to TouchEventSequence::move", 1);
+                if (x === undefined)
+                    x = target.width / 2;
+                if (y === undefined)
+                    y = target.height / 2;
+                this._sequence.move(id, target, x, y);
+                return this;
+            },
+
+            stationary: function (id) {
+                if (id === undefined)
+                    qtest_fail("No id given to TouchEventSequence::stationary", 1);
+                this._sequence.stationary(id);
+                return this;
+            },
+
+            release: function (id, target, x, y) {
+                if (!target)
+                    target = this._defaultItem;
+                if (id === undefined)
+                    qtest_fail("No id given to TouchEventSequence::release", 1);
+                if (x === undefined)
+                    x = target.width / 2;
+                if (y === undefined)
+                    y = target.height / 2;
+                this._sequence.release(id, target, x, y);
+                return this;
+            },
+
+            commit: function () {
+                 this._sequence.commit();
+                 return this;
+            }
+        };
+    }
+
+    // Functions that can be overridden in subclasses for init/cleanup duties.
+    /*!
+        \qmlmethod TestCase::initTestCase()
+
+        This function is called before any other test functions in the
+        \l TestCase type.  The default implementation does nothing.
+        The application can provide its own implementation to perform
+        test case initialization.
+
+        \sa cleanupTestCase(), init()
+    */
+    function initTestCase() {}
+
+    /*!
+        \qmlmethod TestCase::cleanupTestCase()
+
+        This function is called after all other test functions in the
+        \l TestCase type have completed.  The default implementation
+        does nothing.  The application can provide its own implementation
+        to perform test case cleanup.
+
+        \sa initTestCase(), cleanup()
+    */
+    function cleanupTestCase() {}
+
+    /*!
+        \qmlmethod TestCase::init()
+
+        This function is called before each test function that is
+        executed in the \l TestCase type.  The default implementation
+        does nothing.  The application can provide its own implementation
+        to perform initialization before each test function.
+
+        \sa cleanup(), initTestCase()
+    */
+    function init() {}
+
+    /*!
+        \qmlmethod TestCase::cleanup()
+
+        This function is called after each test function that is
+        executed in the \l TestCase type.  The default implementation
+        does nothing.  The application can provide its own implementation
+        to perform cleanup after each test function.
+
+        \sa init(), cleanupTestCase()
+    */
+    function cleanup() {}
+
+    /*! \internal */
+    function qtest_verifyItem(item, method) {
+        try {
+            if (!(item instanceof Item) &&
+                !(item instanceof Window)) {
+                // it's a QObject, but not a type
+                qtest_fail("TypeError: %1 requires an Item or Window type".arg(method), 2);
+                return false;
+            }
+        } catch (e) { // it's not a QObject
+            qtest_fail("TypeError: %1 requires an Item or Window type".arg(method), 3);
+            return false;
+        }
+
+        return true;
+    }
+
+    /*! \internal */
+    function qtest_runInternal(prop, arg) {
+        try {
+            qtest_testCaseResult = testCase[prop](arg)
+        } catch (e) {
+            qtest_testCaseResult = []
+            if (e.message.indexOf("QtQuickTest::") != 0) {
+                // Test threw an unrecognized exception - fail.
+                qtest_results.fail("Uncaught exception: " + e.message,
+                             e.fileName, e.lineNumber)
+            }
+        }
+        return !qtest_results.failed
+    }
+
+    /*! \internal */
+    function qtest_runFunction(prop, arg) {
+        qtest_runInternal("init")
+        if (!qtest_results.skipped) {
+            qtest_runInternal(prop, arg)
+            qtest_results.finishTestData()
+            qtest_runInternal("cleanup")
+            qtest_destroyTemporaryObjects()
+            qtest_results.finishTestDataCleanup()
+            // wait(0) will call processEvents() so objects marked for deletion
+            // in the test function will be deleted.
+            wait(0)
+        }
+    }
+
+    /*! \internal */
+    function qtest_runBenchmarkFunction(prop, arg) {
+        qtest_results.startMeasurement()
+        do {
+            qtest_results.beginDataRun()
+            do {
+                // Run the initialization function.
+                qtest_runInternal("init")
+                if (qtest_results.skipped)
+                    break
+
+                // Execute the benchmark function.
+                if (prop.indexOf("benchmark_once_") != 0)
+                    qtest_results.startBenchmark(TestResult.RepeatUntilValidMeasurement, qtest_results.dataTag)
+                else
+                    qtest_results.startBenchmark(TestResult.RunOnce, qtest_results.dataTag)
+                while (!qtest_results.isBenchmarkDone()) {
+                    var success = qtest_runInternal(prop, arg)
+                    qtest_results.finishTestData()
+                    if (!success)
+                        break
+                    qtest_results.nextBenchmark()
+                }
+                qtest_results.stopBenchmark()
+
+                // Run the cleanup function.
+                qtest_runInternal("cleanup")
+                qtest_results.finishTestDataCleanup()
+                // wait(0) will call processEvents() so objects marked for deletion
+                // in the test function will be deleted.
+                wait(0)
+            } while (!qtest_results.measurementAccepted())
+            qtest_results.endDataRun()
+        } while (qtest_results.needsMoreMeasurements())
+    }
+
+    /*! \internal */
+    function qtest_run() {
+        if (TestLogger.log_start_test()) {
+            qtest_results.reset()
+            qtest_results.testCaseName = name
+            qtest_results.startLogging()
+        } else {
+            qtest_results.testCaseName = name
+        }
+        running = true
+
+        // Check the run list to see if this class is mentioned.
+        let checkNames = false
+        let testsToRun = {} // explicitly provided function names to run and their tags for data-driven tests
+
+        if (qtest_results.functionsToRun.length > 0) {
+            checkNames = true
+            var found = false
+
+            if (name.length > 0) {
+                for (var index in qtest_results.functionsToRun) {
+                    let caseFuncName = qtest_results.functionsToRun[index]
+                    if (caseFuncName.indexOf(name + "::") != 0)
+                        continue
+
+                    found = true
+                    let funcName = caseFuncName.substring(name.length + 2)
+
+                    if (!(funcName in testsToRun))
+                        testsToRun[funcName] = []
+
+                    let tagName = qtest_results.tagsToRun[index]
+                    if (tagName.length > 0) // empty tags mean run all rows
+                        testsToRun[funcName].push(tagName)
+                }
+            }
+            if (!found) {
+                completed = true
+                if (!TestLogger.log_complete_test(qtest_testId)) {
+                    qtest_results.stopLogging()
+                    Qt.quit()
+                }
+                qtest_results.testCaseName = ""
+                return
+            }
+        }
+
+        // Run the initTestCase function.
+        qtest_results.functionName = "initTestCase"
+        var runTests = true
+        if (!qtest_runInternal("initTestCase"))
+            runTests = false
+        qtest_results.finishTestData()
+        qtest_results.finishTestDataCleanup()
+        qtest_results.finishTestFunction()
+
+        // Run the test methods.
+        var testList = []
+        if (runTests) {
+            for (var prop in testCase) {
+                if (prop.indexOf("test_") != 0 && prop.indexOf("benchmark_") != 0)
+                    continue
+                var tail = prop.lastIndexOf("_data");
+                if (tail != -1 && tail == (prop.length - 5))
+                    continue
+                testList.push(prop)
+            }
+            testList.sort()
+        }
+
+        for (var index in testList) {
+            var prop = testList[index]
+
+            if (checkNames && !(prop in testsToRun))
+                continue
+
+            var datafunc = prop + "_data"
+            var isBenchmark = (prop.indexOf("benchmark_") == 0)
+            qtest_results.functionName = prop
+
+            if (!(datafunc in testCase))
+                datafunc = "init_data";
+
+            if (datafunc in testCase) {
+                if (qtest_runInternal(datafunc)) {
+                    var table = qtest_testCaseResult
+                    var haveData = false
+
+                    let checkTags = (checkNames && testsToRun[prop].length > 0)
+
+                    qtest_results.initTestTable()
+                    for (var index in table) {
+                        haveData = true
+                        var row = table[index]
+                        if (!row.tag)
+                            row.tag = "row " + index    // Must have something
+                        if (checkTags) {
+                            let tags = testsToRun[prop]
+                            let tagIdx = tags.indexOf(row.tag)
+                            if (tagIdx < 0)
+                                continue
+                            tags.splice(tagIdx, 1)
+                        }
+                        qtest_results.dataTag = row.tag
+                        if (isBenchmark)
+                            qtest_runBenchmarkFunction(prop, row)
+                        else
+                            qtest_runFunction(prop, row)
+                        qtest_results.dataTag = ""
+                        qtest_results.skipped = false
+                    }
+                    if (!haveData) {
+                        if (datafunc === "init_data")
+                           qtest_runFunction(prop, null, isBenchmark)
+                        else
+                           qtest_results.warn("no data supplied for " + prop + "() by " + datafunc + "()"
+                                            , util.callerFile(), util.callerLine());
+                    }
+                    qtest_results.clearTestTable()
+                }
+            } else if (isBenchmark) {
+                qtest_runBenchmarkFunction(prop, null, isBenchmark)
+            } else {
+                qtest_runFunction(prop, null, isBenchmark)
+            }
+            qtest_results.finishTestFunction()
+            qtest_results.skipped = false
+
+            if (checkNames && testsToRun[prop].length <= 0)
+                delete testsToRun[prop]
+        }
+
+        // Run the cleanupTestCase function.
+        qtest_results.skipped = false
+        qtest_results.functionName = "cleanupTestCase"
+        qtest_runInternal("cleanupTestCase")
+
+        // Complain about missing functions that we were supposed to run.
+        if (checkNames) {
+            let missingTests = []
+            for (var func in testsToRun) {
+                let caseFuncName = name + '::' + func
+                let tags = testsToRun[func]
+                if (tags.length <= 0)
+                    missingTests.push(caseFuncName)
+                else
+                    for (var i in tags)
+                        missingTests.push(caseFuncName + ':' + tags[i])
+            }
+            missingTests.sort()
+            if (missingTests.length > 0)
+                qtest_results.fail("Could not find test functions: " + missingTests, "", 0)
+        }
+
+        // Clean up and exit.
+        running = false
+        completed = true
+        qtest_results.finishTestData()
+        qtest_results.finishTestDataCleanup()
+        qtest_results.finishTestFunction()
+        qtest_results.functionName = ""
+
+        // Stop if there are no more tests to be run.
+        if (!TestLogger.log_complete_test(qtest_testId)) {
+            qtest_results.stopLogging()
+            Qt.quit()
+        }
+        qtest_results.testCaseName = ""
+    }
+
+    onWhenChanged: {
+        if (when != qtest_prevWhen) {
+            qtest_prevWhen = when
+            if (when && !completed && !running && qtest_componentCompleted)
+                qtest_run()
+        }
+    }
+
+    onOptionalChanged: {
+        if (!completed) {
+            if (optional)
+                TestLogger.log_optional_test(qtest_testId)
+            else
+                TestLogger.log_mandatory_test(qtest_testId)
+        }
+    }
+}