build_ast_schema should set internal enum values (fixes #111)

Author: Cito

src/graphql/utilities/extend_schema.py

@@ -481,7 +481,9 @@ def build_enum_value_map(
                 # Note: While this could make assertions to get the correctly typed
                 # value, that would throw immediately while type system validation
                 # with validate_schema() will produce more actionable results.
-                enum_value_map[value.name.value] = GraphQLEnumValue(
+                value_name = value.name.value
+                enum_value_map[value_name] = GraphQLEnumValue(
+                    value=value_name,
                     description=value.description.value if value.description else None,
                     deprecation_reason=get_deprecation_reason(value),
                     ast_node=value,

tests/utilities/test_build_ast_schema.py

@@ -1,5 +1,5 @@
 from collections import namedtuple
-from typing import Union
+from typing import cast, Union
 
 from pytest import raises  # type: ignore
 
@@ -16,6 +16,7 @@
     GraphQLInt,
     GraphQLString,
     GraphQLArgument,
+    GraphQLEnumType,
     GraphQLEnumValue,
     GraphQLField,
     GraphQLInputField,
@@ -403,6 +404,12 @@ def multiple_value_enum():
         )
         assert cycle_sdl(sdl) == sdl
 
+        # check that the internal values are the same as the names
+        schema = build_schema(sdl)
+        enum_type = schema.get_type("Hello")
+        assert isinstance(enum_type, GraphQLEnumType)
+        assert [value.value for value in enum_type.values.values()] == ["WO", "RLD"]
+
     def empty_union():
         sdl = dedent(
             """