ModelTest is not yet supported by PySide2

src/common.py

@@ -17,7 +17,7 @@ import logging.handlers
 import socket
 from signal import signal, SIGABRT, SIGINT, SIGTERM
 
-from qt import QStandardPaths, QObject, QGraphicsItem
+from qt import QStandardPaths, QObject, QGraphicsItem, QSize
 
 # pylint: disable=invalid-name
 
@@ -259,8 +259,24 @@ Options {stropt} take a string argument like {example}.
                 type.__setattr__(Debug, option, value)
         if Debug.time:
             Debug.time = datetime.datetime.now()
+        if Debug.modelTest and not Debug.modeltest_is_supported():
+            print('--debug=modelTest is not yet supported for pyside, use pyqt')
+            sys.exit(2)
         return None
 
+    @staticmethod
+    def modeltest_is_supported():
+        """Is the QT binding supported."""
+        try:
+            import sip
+        except ImportError:
+            return False
+        try:
+            _ = sip.cast(QSize(), QSize)
+            return True
+        except TypeError:
+            return False
+
     @staticmethod
     def str():
         """__str__ does not work with class objects"""