fix: accept dict instead of true enum, for Grid.set_enum()

tests/grids/test_base.py

@@ -1602,15 +1602,30 @@ class TestGrid(WebTestCase):
         grid = self.make_grid(columns=["foo", "bar"])
         obj = {"status": None}
 
-        # null
+        # true enum, null
         value = grid.render_enum(obj, "status", None, enum=enum.UpgradeStatus)
         self.assertIsNone(value)
 
-        # normal
+        # true enum, normal value
         obj["status"] = enum.UpgradeStatus.SUCCESS
         value = grid.render_enum(obj, "status", "SUCCESS", enum=enum.UpgradeStatus)
         self.assertEqual(value, "success")
 
+        # dict enum
+        statuses = {
+            enum.UpgradeStatus.SUCCESS.name: "success",
+            enum.UpgradeStatus.FAILURE.name: "failure",
+        }
+
+        # dict enum, null
+        value = grid.render_enum(obj, "status", None, enum=statuses)
+        self.assertIsNone(value)
+
+        # true enum, normal value
+        obj["status"] = enum.UpgradeStatus.SUCCESS.value
+        value = grid.render_enum(obj, "status", "SUCCESS", enum=statuses)
+        self.assertEqual(value, "success")
+
     def test_render_percent(self):
         grid = self.make_grid(columns=["foo", "bar"])
         obj = MagicMock()