Check WritableStream underlyingSink methods
Created attachment 406669 [details] Patch
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/25025
WPT PR merged
Committed r265747: <https://trac.webkit.org/changeset/265747> All reviewed patches have been landed. Closing bug and clearing flags on attachment 406669 [details].
<rdar://problem/67223706>