Improve error message when setting to a property with unknown type

At the moment we were being told that the types were incompatible but
the truth was we were comparing to nullptr.
This patch makes it apparent that the assigning broke because the type
comparison never happened.

Change-Id: I29728eedeee13c3bc9389213735df142f56e9c34
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmllanguage/testtypes.h b/tests/auto/qml/qqmllanguage/testtypes.h
index 0618d2b20f..1aab24841a 100644
--- a/tests/auto/qml/qqmllanguage/testtypes.h
+++ b/tests/auto/qml/qqmllanguage/testtypes.h
@@ -89,6 +89,14 @@ private:
     int m_value2;
 };
 
+class SomethingUnknown : public QObject {
+    Q_OBJECT
+};
+
+class SomethingKnown : public SomethingUnknown {
+    Q_OBJECT
+};
+
 class MyQmlObject : public QObject, public MyInterface
 {
     Q_OBJECT
@@ -104,6 +112,7 @@ class MyQmlObject : public QObject, public MyInterface
     Q_PROPERTY(int propertyWithNotify READ propertyWithNotify WRITE setPropertyWithNotify NOTIFY oddlyNamedNotifySignal)
     Q_PROPERTY(int nonScriptable READ nonScriptable WRITE setNonScriptable SCRIPTABLE false)
     Q_PROPERTY(QJSValue qjsvalue READ qjsvalue WRITE setQJSValue NOTIFY qjsvalueChanged)
+    Q_PROPERTY(SomethingUnknown* somethingUnknown READ somethingUnknown WRITE setSomethingUnknown NOTIFY somethingUnknownChanged)
 
     Q_INTERFACES(MyInterface)
 public:
@@ -151,6 +160,9 @@ public:
 
     int childAddedEventCount() const { return m_childAddedEventCount; }
 
+    SomethingUnknown* somethingUnknown() const { return nullptr; }
+    void setSomethingUnknown(SomethingUnknown* something) { Q_UNUSED(something); }
+
 public slots:
     void basicSlot() { qWarning("MyQmlObject::basicSlot"); }
     void basicSlotWithArgs(int v) { qWarning("MyQmlObject::basicSlotWithArgs(%d)", v); }
@@ -162,6 +174,7 @@ signals:
     void oddlyNamedNotifySignal();
     void signalWithDefaultArg(int parameter = 5);
     void qjsvalueChanged();
+    void somethingUnknownChanged();
 
 protected:
     virtual bool event(QEvent *event);