TypesTool.getInterfaceTypeList(): Filesystem Interfaces were not returned.

And thus filesystem Interfaces were not displayed/selectable in BaseType_view.

product/ERP5Type/Tool/TypesTool.py

@@ -274,9 +274,11 @@ class TypesTool(TypeProvider):
     Return a list of class names that can be used as Interfaces
     """
     from Products.ERP5Type import interfaces
+    from zope.interface.interface import InterfaceClass
     return self._getTypeList(
       'Interface Component',
-      [name for name, _ in inspect.getmembers(interfaces, inspect.isclass)])
+      [name for name, _ in inspect.getmembers(interfaces,
+                                              lambda x: isinstance(x, InterfaceClass))])
 
   security.declareProtected(Permissions.ModifyPortalContent,
                             'resetDynamicDocumentsOnceAtTransactionBoundary')

product/ERP5Type/tests/testDynamicClassGeneration.py

@@ -226,9 +226,10 @@ class TestPortalTypeClass(ERP5TypeTestCase):
     # a new interface
     class IForTest(Interface):
       pass
+    self.assertFalse('IForTest' in self.portal.portal_types.getInterfaceTypeList())
     from Products.ERP5Type import interfaces
     interfaces.IForTest = IForTest
-
+    self.assertTrue('IForTest' in self.portal.portal_types.getInterfaceTypeList())
 
     # one new type
     dummy_type = types_tool.newContent('InterfaceTestType',