Qt object: Add exit(int)

This is similar to the Qt.quit() function but also specifies the return
code that the event loop will return.

[ChangeLog][QtQml] Added exit(int retCode) method to the Qt global object.
An application can call Qt.exit to specify a return code of the engine.

Task-number: QTBUG-54360
Change-Id: Iaa319e6dc4d6b99dc3a5c01845e87b936fd2cab0
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

2 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlqt/data/exit.qml b/tests/auto/qml/qqmlqt/data/exit.qml
new file mode 100644
index 0000000000..12727d9f04
--- /dev/null
+++ b/tests/auto/qml/qqmlqt/data/exit.qml
@@ -0,0 +1,7 @@
+import QtQuick 2.0
+
+QtObject {
+    property int returnCode: -1
+    Component.onCompleted: Qt.exit(returnCode)
+}
+
diff --git a/tests/auto/qml/qqmlqt/tst_qqmlqt.cpp b/tests/auto/qml/qqmlqt/tst_qqmlqt.cpp
index 8150241e4a..69791085c5 100644
--- a/tests/auto/qml/qqmlqt/tst_qqmlqt.cpp
+++ b/tests/auto/qml/qqmlqt/tst_qqmlqt.cpp
@@ -87,6 +87,7 @@ private slots:
     void atob();
     void fontFamilies();
     void quit();
+    void exit();
     void resolvedUrl();
     void later_data();
     void later();
@@ -980,6 +981,20 @@ void tst_qqmlqt::quit()
     delete object;
 }
 
+void tst_qqmlqt::exit()
+{
+    QQmlComponent component(&engine, testFileUrl("exit.qml"));
+
+    QSignalSpy spy(&engine, &QQmlEngine::exit);
+    QObject *object = component.create();
+    QVERIFY(object != Q_NULLPTR);
+    QCOMPARE(spy.count(), 1);
+    QList<QVariant> arguments = spy.takeFirst();
+    QVERIFY(arguments.at(0).toInt() == object->property("returnCode").toInt());
+
+    delete object;
+}
+
 void tst_qqmlqt::resolvedUrl()
 {
     QQmlComponent component(&engine, testFileUrl("resolvedUrl.qml"));