Replace with a test that at least exercises the create_editor method

traits/tests/test_enum.py

@@ -14,6 +14,7 @@
 from traits.api import (
     Any, BaseEnum, Enum, HasTraits, Int, List, Property, Set, TraitError,
     Tuple)
+from traits.testing.optional_dependencies import requires_traitsui
 
 
 class FooEnum(enum.Enum):
@@ -111,13 +112,6 @@ class EnumCollectionExample(HasTraits):
     slow_enum = BaseEnum("yes", "no", "maybe")
 
 
-class EnumCollectionGUIExample(EnumCollectionExample):
-    # Override attributes that may fail GUI test
-    # until traitsui #781 is fixed.
-    int_set_enum = Enum("int", "set")
-    correct_int_set_enum = Enum("int", "set")
-
-
 class EnumTestCase(unittest.TestCase):
     def test_valid_enum(self):
         example_model = ExampleModel(root="model1")
@@ -336,3 +330,17 @@ class HasEnumInList(HasTraits):
         model.digit_sequence = [-1, 0, 1, 1]
         with self.assertRaises(TraitError):
             model.digit_sequence = [-1, 0, 2, 1]
+
+
+@requires_traitsui
+class TestEnumCreateEditor(unittest.TestCase):
+    def test_create_editor(self):
+        import traitsui.editor_factory
+
+        obj = EnumListExample()
+        trait = obj.trait("value")
+        editor_factory = trait.trait_type.create_editor()
+        self.assertIsInstance(
+            editor_factory,
+            traitsui.editor_factory.EditorFactory
+        )