Add support for enum (#34)

tests/test_lib.py

@@ -1,3 +1,5 @@
+from enum import Enum
+
 import voluptuous as vol
 
 from voluptuous_serialize import UNSUPPORTED, convert
@@ -188,3 +190,17 @@ def custem_serializer(schema):
 def test_constant():
     for value in True, False, "Hello", 1:
         assert {"type": "constant", "value": value} == convert(vol.Schema(value))
+
+
+def test_enum():
+    class TestEnum(Enum):
+        ONE = "one"
+        TWO = 2
+
+    assert {
+        "type": "select",
+        "options": [
+            ("one", "one"),
+            (2, 2),
+        ],
+    } == convert(vol.Schema(vol.Coerce(TestEnum)))

voluptuous_serialize/__init__.py

@@ -1,5 +1,6 @@
 """Module to convert voluptuous schemas to dictionaries."""
 from collections.abc import Mapping
+from enum import Enum
 
 import voluptuous as vol
 
@@ -109,4 +110,10 @@ def convert(schema, *, custom_serializer=None):
     if isinstance(schema, (str, int, float, bool)):
         return {"type": "constant", "value": schema}
 
+    if issubclass(schema, Enum):
+        return {
+            "type": "select",
+            "options": [(item.value, item.value) for item in schema],
+        }
+
     raise ValueError("Unable to convert schema: {}".format(schema))