Load component synchronously in method_createQmlObject

setData() is not guaranteed to synchronously load the type. In
fact, most of the time, it doesn't. However, by adding a private
Synchronous mode to QQmlTypeLoader we can prefetch the type
synchronously and then inject it into the component.

Task-number: QTBUG-45418
Change-Id: I640f12ad20c01b778b5bc41f43574d8aea504195
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

2 files changed, 53 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmltypeloader/data/load_synchronous.qml b/tests/auto/qml/qqmltypeloader/data/load_synchronous.qml
new file mode 100644
index 0000000000..5e9c4c2bdc
--- /dev/null
+++ b/tests/auto/qml/qqmltypeloader/data/load_synchronous.qml
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQml 2.2
+
+QtObject {
+    id: top
+
+    Component.onCompleted: {
+        Qt.createQmlObject('QtObject {}', top, 'nonprotocol:');
+    }
+}
diff --git a/tests/auto/qml/qqmltypeloader/tst_qqmltypeloader.cpp b/tests/auto/qml/qqmltypeloader/tst_qqmltypeloader.cpp
index 77cdaae9f0..4c5b1f7e63 100644
--- a/tests/auto/qml/qqmltypeloader/tst_qqmltypeloader.cpp
+++ b/tests/auto/qml/qqmltypeloader/tst_qqmltypeloader.cpp
@@ -43,6 +43,7 @@ class tst_QQMLTypeLoader : public QQmlDataTest
 
 private slots:
     void testLoadComplete();
+    void loadComponentSynchronously();
 };
 
 void tst_QQMLTypeLoader::testLoadComplete()
@@ -62,6 +63,16 @@ void tst_QQMLTypeLoader::testLoadComplete()
     delete window;
 }
 
+void tst_QQMLTypeLoader::loadComponentSynchronously()
+{
+    QQmlEngine engine;
+    QTest::ignoreMessage(QtWarningMsg, QRegularExpression(
+                             QLatin1String(".*nonprotocol::1:1: QtObject is not a type.*")));
+    QQmlComponent component(&engine, testFileUrl("load_synchronous.qml"));
+    QObject *o = component.create();
+    QVERIFY(o);
+}
+
 QTEST_MAIN(tst_QQMLTypeLoader)
 
 #include "tst_qqmltypeloader.moc"