Added test case for unlink issue (solved already in gaphas)

tests/test_issue_gaphas.py

@@ -0,0 +1,34 @@
+
+from gaphor.tests import TestCase
+from gaphor import UML
+from gaphor.diagram import items
+from gaphor.diagram.interfaces import IConnect
+from zope import component
+from gaphas.aspect import ConnectionSink
+import gaphor.adapters.classes.classconnect
+
+class GaphasTest(TestCase):
+
+    services = TestCase.services + [ 'sanitizer_service', 'undo_manager' ]
+
+    def test_remove_class_with_association(self):
+        c1 = self.create(items.ClassItem, UML.Class)
+        c1.name = 'klassitem1'
+        c2 = self.create(items.ClassItem, UML.Class)
+        c2.name = 'klassitem2'
+
+        a = self.create(items.AssociationItem)
+
+        assert 3 == len(self.diagram.canvas.get_all_items())
+
+        self.connect(a, a.head, c1)
+        self.connect(a, a.tail, c2)
+
+        assert a.subject
+        assert self.element_factory.lselect(lambda e: e.isKindOf(UML.Association))[0] is a.subject
+        
+        c1.unlink()
+
+        self.diagram.canvas.update_now()
+
+# vim:sw=4:et:ai