test: update test_pydantic_model_function for inlined $ref schema (#2384)

After the dereference_local_refs fix, the UserInput model's properties
land directly under tool.parameters["properties"]["user"]["properties"]
instead of inside the $defs container. Update the test assertions to
match the new (LLM-consumable) schema shape.

This is the only test in test_tool_manager.py that was checking the
$defs location; all other tests check tool behavior or per-property
fields that are unaffected by the inlining.

Signed-off-by: Mukunda Katta <mukunda.vjcs6@gmail.com>

Author: MukundaKatta

tests/server/mcpserver/test_tool_manager.py

@@ -100,8 +100,10 @@ def create_user(user: UserInput, flag: bool) -> dict[str, Any]:  # pragma: no co
         assert tool.name == "create_user"
         assert tool.description == "Create a new user."
         assert tool.is_async is False
-        assert "name" in tool.parameters["$defs"]["UserInput"]["properties"]
-        assert "age" in tool.parameters["$defs"]["UserInput"]["properties"]
+        # $ref is now inlined (see dereference_local_refs in utilities/schema.py).
+        # The UserInput definition is merged directly into properties.user.
+        assert "name" in tool.parameters["properties"]["user"]["properties"]
+        assert "age" in tool.parameters["properties"]["user"]["properties"]
         assert "flag" in tool.parameters["properties"]
 
     def test_add_callable_object(self):