added test for Enums and convert_to_sql_value

Author: dantownsend

tests/utils/test_sql_values.py

@@ -1,6 +1,7 @@
+from enum import Enum
 from unittest import TestCase
 
-from piccolo.columns.column_types import Integer, JSON, JSONB
+from piccolo.columns.column_types import Integer, JSON, JSONB, Varchar
 from piccolo.table import Table
 from piccolo.utils.sql_values import convert_to_sql_value
 
@@ -38,11 +39,22 @@ class MyTable(Table):
             convert_to_sql_value(value=instance, column=MyTable.id), 1
         )
 
+    def test_convert_enum(self):
+        """
+        Make sure Enum instances are converted to their values.
+        """
+
+        class Colour(Enum):
+            red = "red"
+
+        self.assertEqual(
+            convert_to_sql_value(value=Colour.red, column=Varchar()), "red"
+        )
+
     def test_other(self):
         """
         Make sure simple Python values are returned correctly.
         """
         self.assertEqual(
             convert_to_sql_value(value=1, column=Integer()), 1,
         )
-