We are just flagging these tests as pipeTo specification is not complete. When it becomes more complete, we'll have a deeper look.
Now it is failing in GTK+ too.
Committed r193644: <http://trac.webkit.org/changeset/193644>
After the last round of stream commits, pipe-to.html keeps failing with this diff (from a Catalina build): -FAIL Piping to a writable stream that does not consume the writes fast enough exerts backpressure on the source |this| is not a Promise +FAIL Piping to a writable stream that does not consume the writes fast enough exerts backpressure on the source assert_equals: at t = 0 ms, ws should be writable expected (string) "writable" but got (undefined) undefined The test still expects WritableStream to have the 'state' attribute, but it is some detail from the reference implementation, not part of the public WritableStraem API, right? Btw, testing with both GTK and WPE removing the state check fails at 225ms with: -FAIL Piping to a writable stream that does not consume the writes fast enough exerts backpressure on the source |this| is not a Promise +FAIL Piping to a writable stream that does not consume the writes fast enough exerts backpressure on the source assert_array_equals: at t = 225 ms, the two enqueued chunks in rs did not cause backpressure property 1, expected 1 but got 0