[cookies] Remove cookies when tests complete #12817
Merged
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Avoid test interactions by removing cookies at the completion of each
test. Use the
add_cleanup
feature of testharness.js to ensure thatthis occurs regardless of the passing/failing status of each test.
Persist the existing "setup" logic which defensively removes cookies as
a precaution against still other tests which do not properly restore
global state.
This resolves a known instability caused by
cookies/prefix/__secure.document-cookie.https.html
. That test sets acookie with a "Domain" attribute which
cookies/prefix/__secure.header.https.html
is not written to remove.