Allow threaded compilation in an async Loader

Enables threaded compilation for a Loader "source".

Change-Id: I2d60a3ace07aab58f3b8f069e45a2864178c959f
Reviewed-by: Chris Adams <christopher.adams@nokia.com>

4 files changed, 1232 insertions, 2 deletions

diff --git a/tests/auto/qml/qqmlcomponent/data/TestComponent.2.qml b/tests/auto/qml/qqmlcomponent/data/TestComponent.2.qml
new file mode 100644
index 0000000000..fca43fe2dc
--- /dev/null
+++ b/tests/auto/qml/qqmlcomponent/data/TestComponent.2.qml
@@ -0,0 +1,591 @@
+import QtQuick 2.0
+
+Item {
+    id: root
+    objectName: "root"
+    property int zero: 0
+
+    Item {
+        id: c1
+        objectName: "c1"
+        property int one: zero + 1
+
+        Item {
+            id: c1c1
+            objectName: "c1c1"
+            property bool two: c2c1c1.two
+        }
+
+        Item {
+            id: c1c2
+            objectName: "c1c2"
+            property string three: "three"
+
+            Rectangle {
+                id: c1c2c3
+                objectName: "c1c2c3"
+                property alias othercolor: c2c1.color
+                color: if (c2c1.color == Qt.rgba(0,0,1)) Qt.rgba(1,0,0); else Qt.rgba(0,1,0);
+            }
+        }
+    }
+
+    Item {
+        id: c2
+        objectName: "c2"
+        property string two: "two"
+
+        Rectangle {
+            id: c2c1
+            objectName: "c2c1"
+            property string three: "2" + c1c2.three
+            color: "blue"
+
+            MouseArea {
+                id: c2c1c1
+                objectName: "c2c1c1"
+                property bool two: false
+                onClicked: two = !two
+            }
+
+            Item {
+                id: c2c1c2
+                objectName: "c2c1c2"
+                property string three: "1" + parent.three
+            }
+        }
+    }
+
+    Item {
+        id: c3
+        objectName: "c3"
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+        Item {}
+    }
+
+    property bool success: true
+    Component.onCompleted: {
+        // test state after initial bindings evaluation
+        if (zero != 0) success = false;
+        if (c1.one != 1) success = false;
+        if (c1c1.two != false) success = false;
+        if (c1c2.three != "three") success = false;
+        if (c1c2c3.color != Qt.rgba(1,0,0)) success = false;
+        if (c2.two != "two") success = false;
+        if (c2c1.three != "2three") success = false;
+        if (c2c1.color != Qt.rgba(0,0,1)) success = false;
+        if (c2c1c1.two != false) success = false;
+        if (c2c1c2.three != "12three") success = false;
+        if (c3.children.length != 500) success = false;
+
+        // now retrigger bindings evaluation
+        root.zero = 5;
+        if (c1.one != 6) success = false;
+        c2c1c1.two = true;
+        if (c1c1.two != true) success = false;
+        c1c2.three = "3";
+        if (c2c1.three != "23") success = false;
+        if (c2c1c2.three != "123") success = false;
+        c2c1.color = Qt.rgba(1,0,0);
+        if (c1c2c3.color != Qt.rgba(0,1,0)) success = false;
+        if (c1c2c3.othercolor != Qt.rgba(1,0,0)) success = false;
+    }
+}
diff --git a/tests/auto/qml/qqmlcomponent/data/TestComponent.qml b/tests/auto/qml/qqmlcomponent/data/TestComponent.qml
new file mode 100644
index 0000000000..64cec1cd06
--- /dev/null
+++ b/tests/auto/qml/qqmlcomponent/data/TestComponent.qml
@@ -0,0 +1,534 @@
+import QtQuick 2.0
+
+Item {
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+    Item {}
+}
diff --git a/tests/auto/qml/qqmlcomponent/qqmlcomponent.pro b/tests/auto/qml/qqmlcomponent/qqmlcomponent.pro
index cf1c398ce5..6667513395 100644
--- a/tests/auto/qml/qqmlcomponent/qqmlcomponent.pro
+++ b/tests/auto/qml/qqmlcomponent/qqmlcomponent.pro
@@ -2,7 +2,11 @@ CONFIG += testcase
 TARGET = tst_qqmlcomponent
 macx:CONFIG -= app_bundle
 
-SOURCES += tst_qqmlcomponent.cpp
+INCLUDEPATH += ../../shared/
+SOURCES += tst_qqmlcomponent.cpp \
+            ../../shared/testhttpserver.cpp
+
+HEADERS += ../../shared/testhttpserver.h
 
 include (../../shared/util.pri)
 
@@ -10,4 +14,4 @@ TESTDATA = data/*
 
 CONFIG += parallel_test
 
-QT += core-private gui-private qml-private network testlib
+QT += core-private gui-private qml-private quick-private network testlib
diff --git a/tests/auto/qml/qqmlcomponent/tst_qqmlcomponent.cpp b/tests/auto/qml/qqmlcomponent/tst_qqmlcomponent.cpp
index 603c091a03..10181aa9b8 100644
--- a/tests/auto/qml/qqmlcomponent/tst_qqmlcomponent.cpp
+++ b/tests/auto/qml/qqmlcomponent/tst_qqmlcomponent.cpp
@@ -45,8 +45,14 @@
 #include <QtQml/qqmlcomponent.h>
 #include <QtQml/qqmlproperty.h>
 #include <QtQml/qqmlincubator.h>
+#include <QtQuick>
+#include <QtQuick/private/qquickrectangle_p.h>
+#include <QtQuick/private/qquickmousearea_p.h>
 #include <qcolor.h>
 #include "../../shared/util.h"
+#include "testhttpserver.h"
+
+#define SERVER_PORT 14450
 
 class MyIC : public QObject, public QQmlIncubationController
 {
@@ -59,6 +65,37 @@ protected:
     }
 };
 
+class ComponentWatcher : public QObject
+{
+    Q_OBJECT
+public:
+    ComponentWatcher(QQmlComponent *comp) : loading(0), error(0), ready(0) {
+        connect(comp, SIGNAL(statusChanged(QQmlComponent::Status)),
+                this, SLOT(statusChanged(QQmlComponent::Status)));
+    }
+
+    int loading;
+    int error;
+    int ready;
+
+public slots:
+    void statusChanged(QQmlComponent::Status status) {
+        switch (status) {
+        case QQmlComponent::Loading:
+            ++loading;
+            break;
+        case QQmlComponent::Error:
+            ++error;
+            break;
+        case QQmlComponent::Ready:
+            ++ready;
+            break;
+        default:
+            break;
+        }
+    }
+};
+
 class tst_qqmlcomponent : public QQmlDataTest
 {
     Q_OBJECT
@@ -72,6 +109,8 @@ private slots:
     void qmlCreateObjectWithProperties();
     void qmlIncubateObject();
     void qmlCreateParentReference();
+    void async();
+    void asyncHierarchy();
 
 private:
     QQmlEngine engine;
@@ -213,6 +252,68 @@ void tst_qqmlcomponent::qmlCreateParentReference()
     QCOMPARE(warnings.count(), 0);
 }
 
+void tst_qqmlcomponent::async()
+{
+    TestHTTPServer server(SERVER_PORT);
+    QVERIFY(server.isValid());
+    server.serveDirectory(dataDirectory());
+
+    QQmlComponent component(&engine);
+    ComponentWatcher watcher(&component);
+    component.loadUrl(QUrl("http://127.0.0.1:14450/TestComponent.qml"), QQmlComponent::Asynchronous);
+    QCOMPARE(watcher.loading, 1);
+    QTRY_VERIFY(component.isReady());
+    QCOMPARE(watcher.ready, 1);
+    QCOMPARE(watcher.error, 0);
+
+    QObject *object = component.create();
+    QVERIFY(object != 0);
+
+    delete object;
+}
+
+void tst_qqmlcomponent::asyncHierarchy()
+{
+    TestHTTPServer server(SERVER_PORT);
+    QVERIFY(server.isValid());
+    server.serveDirectory(dataDirectory());
+
+    // ensure that the item hierarchy is compiled correctly.
+    QQmlComponent component(&engine);
+    ComponentWatcher watcher(&component);
+    component.loadUrl(QUrl("http://127.0.0.1:14450/TestComponent.2.qml"), QQmlComponent::Asynchronous);
+    QCOMPARE(watcher.loading, 1);
+    QTRY_VERIFY(component.isReady());
+    QCOMPARE(watcher.ready, 1);
+    QCOMPARE(watcher.error, 0);
+
+    QObject *root = component.create();
+    QVERIFY(root != 0);
+
+    // ensure that the parent-child relationship hierarchy is correct
+    QQuickItem *c1 = root->findChild<QQuickItem*>("c1", Qt::FindDirectChildrenOnly);
+    QVERIFY(c1);
+    QQuickItem *c1c1 = c1->findChild<QQuickItem*>("c1c1", Qt::FindDirectChildrenOnly);
+    QVERIFY(c1c1);
+    QQuickItem *c1c2 = c1->findChild<QQuickItem*>("c1c2", Qt::FindDirectChildrenOnly);
+    QVERIFY(c1c2);
+    QQuickRectangle *c1c2c3 = c1c2->findChild<QQuickRectangle*>("c1c2c3", Qt::FindDirectChildrenOnly);
+    QVERIFY(c1c2c3);
+    QQuickItem *c2 = root->findChild<QQuickItem*>("c2", Qt::FindDirectChildrenOnly);
+    QVERIFY(c2);
+    QQuickRectangle *c2c1 = c2->findChild<QQuickRectangle*>("c2c1", Qt::FindDirectChildrenOnly);
+    QVERIFY(c2c1);
+    QQuickMouseArea *c2c1c1 = c2c1->findChild<QQuickMouseArea*>("c2c1c1", Qt::FindDirectChildrenOnly);
+    QVERIFY(c2c1c1);
+    QQuickItem *c2c1c2 = c2c1->findChild<QQuickItem*>("c2c1c2", Qt::FindDirectChildrenOnly);
+    QVERIFY(c2c1c2);
+
+    // ensure that values and bindings are assigned correctly
+    QVERIFY(root->property("success").toBool());
+
+    delete root;
+}
+
 QTEST_MAIN(tst_qqmlcomponent)
 
 #include "tst_qqmlcomponent.moc"