fix: Correct expected literal schema for Pydantic 2.7.

Author: mike-oakley

tests/util/test_pydantic_field.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, Union
+from typing import Union
 
 from pydantic import BaseModel, Field
 from typing_extensions import Literal
@@ -59,17 +59,16 @@ def construct_base_open_api() -> OpenAPI:
 def test_pydantic_discriminator_schema_generation() -> None:
     """https://github.com/kuimono/openapi-schema-pydantic/issues/8"""
 
-    a_kind: Dict[str, Any]
-    b_kind: Dict[str, Any]
+    a_kind = {"const": "a", "enum": ["a"], "title": "Kind", "type": "string"}
+    b_kind = {"const": "b", "enum": ["b"], "title": "Kind", "type": "string"}
 
     if PYDANTIC_V2:
         _key_map, json_schema = models_json_schema([(RequestModel, "validation")])
-        a_kind = {"const": "a", "title": "Kind"}
-        b_kind = {"const": "b", "title": "Kind"}
     else:
         json_schema = v1_schema([RequestModel])
-        a_kind = {"enum": ["a"], "title": "Kind", "type": "string"}
-        b_kind = {"enum": ["b"], "title": "Kind", "type": "string"}
+        a_kind.pop("const")
+        b_kind.pop("const")
+
     assert json_schema == {
         DEFS_KEY: {
             "DataAModel": {