@@ -0,0 +1,550 @@
+from gaphor import UML%0Afrom gaphor.diagram.tests.fixtures import find%0Afrom gaphor.UML.interactions.interactionspropertypages import MessagePropertyPage%0A%0A%0Adef test_message_property_page(diagram, element_factory):%0A    item = diagram.create(%0A        UML.interactions.MessageItem, subject=element_factory.create(UML.Message)%0A    )%0A    property_page = MessagePropertyPage(item)%0A%0A    widget = property_page.construct()%0A    message_combo = find(widget, %22message-combo%22)%0A    message_combo.set_active(2)%0A%0A    assert item.subject.messageSort == %22asynchSignal%22%0A

Add tests for message property page