The test decided the expected HTTP status with strings.Contains(tc.params,
"=bad"), but comment IDs are random UUIDs. When one started with "bad"
(e.g. offset_id=bad49e60-...), the param string contained "=bad" and the
case was wrongly expected to return 400 while the handler correctly
returned 200, failing the run about 0.2% of the time.
Identify bad-request cases by their error response body instead, which
is deterministic per case and independent of the generated IDs.
Dmitry VerkhoturovandUmputun
db9d8703ef