test(server): assert the SSE server survives a rejected request

Author: KaiyiQuan

tests/server/test_sse_security.py

@@ -89,12 +89,9 @@ async def test_sse_security_invalid_host_header() -> None:
         assert response.text == "Invalid Host header"
 
         # The server process must stay alive after the rejected request: a
-        # subsequent request to the message endpoint is still served (the
-        # unknown-session 404 proves routing works rather than hanging).
-        response = await client.post(
-            "/messages/?session_id=12345678123456781234567812345678",
-            headers={"Content-Type": "application/json"},
-        )
+        # subsequent request to an unmatched route is still served (404),
+        # proving the ASGI app did not crash.
+        response = await client.get("/")
         assert response.status_code == 404