Add Cookie test and rename test file

tests/test_json_type.py

@@ -1,7 +1,7 @@
 import json
 from typing import Annotated
 
-from fastapi import FastAPI, Form, Header, Query
+from fastapi import Cookie, FastAPI, Form, Header, Query
 from fastapi.testclient import TestClient
 from pydantic import Json
 
@@ -23,6 +23,11 @@ def header_json_list(x_items: Annotated[Json[list[str]], Header()]) -> list[str]
     return x_items
 
 
+@app.get("/cookie-json-list")
+def cookie_json_list(items: Annotated[Json[list[str]], Cookie()]) -> list[str]:
+    return items
+
+
 client = TestClient(app)
 
 
@@ -48,3 +53,11 @@ def test_header_json_list():
     )
     assert response.status_code == 200, response.text
     assert response.json() == ["abc", "def"]
+
+
+def test_cookie_json_list():
+    client.cookies.set("items", json.dumps(["abc", "def"]))
+    response = client.get("/cookie-json-list")
+    assert response.status_code == 200, response.text
+    assert response.json() == ["abc", "def"]
+    client.cookies.clear()