GayathriSrividya commented on code in PR #68054:
URL: https://github.com/apache/airflow/pull/68054#discussion_r3385762558


##########
airflow-core/tests/unit/api_fastapi/execution_api/versions/head/test_router.py:
##########
@@ -67,3 +126,41 @@ def test_expiring_token_is_reissued(
         assert "Refreshed-API-Token" in response.headers
     else:
         assert "Refreshed-API-Token" not in response.headers
+    # avalidated_claims must be called exactly once — by JWTBearer only, not 
by the middleware.
+    auth.avalidated_claims.assert_awaited_once_with("dummy", {})
+
+
[email protected]_test
+def test_token_expiring_mid_request_is_reissued_without_revalidation(client, 
exec_app: FastAPI, time_machine):
+    """Middleware reissues from cached JWTBearer claims without re-validating 
the token.
+
+    Regression test for the TOCTOU race in JWTReissueMiddleware: a heartbeat 
arrives with a
+    token that has ~0s left, JWTBearer validates it (still technically valid 
at that moment),
+    the request completes, and the middleware runs. In the old code the 
middleware would call

Review Comment:
   @ashb working on your suggestions



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