Move ForwardRef annotated dependency test to dedicated module

tests/test_forwardref_in_annotation.py

@@ -0,0 +1,23 @@
+from typing import Annotated, ForwardRef
+
+from fastapi import Depends, FastAPI
+from fastapi.testclient import TestClient
+
+
+def test_annotated_forwardref_dependency():
+    app = FastAPI()
+
+    User = ForwardRef("User")
+
+    def get_user() -> "User":
+        return {"name": "amulya"}
+
+    @app.get("/")
+    def read_user(user: Annotated[User, Depends(get_user)]):
+        return user
+
+    client = TestClient(app)
+    response = client.get("/")
+
+    assert response.status_code == 200
+    assert response.json() == {"name": "amulya"}