kitesurf · WPT

FAIL
expected FAIL · 649 ms
▶ run in kitesurf
Test
/streams/transform-streams/backpressure.any.html
Actual
FAIL
Expected
FAIL
Unexpected
no
Duration
649 ms
Harness
OK
Counts
Reason
Run
https://kitesurf.rendering.cfdata.org/?url=http%3A%2F%2Fwpt.live%2Fstreams%2Ftransform-streams%2Fbackpressure.any.html ↗
Upstream
view on github.com/web-platform-tests/wpt ↗

Subtests

statussubtestmessage
PASSbackpressure allows no transforms with a default identity transform and no reader
PASSbackpressure only allows one transform() with a identity transform with a readable HWM of 1 and no reader
PASStransform() should keep being called as long as there is no backpressure
FAILwrites should resolve as soon as transform completesassert_array_equals: both writes and close() should have resolved lengths differ, expected array ["a", "b", "closed"] length 3, got ["a"] length 1
PASScalling pull() before the first write() with backpressure should work
PASStransform() should be able to read the chunk it just enqueued
FAILblocking transform() should cause backpressureThe value cannot be converted because it is not an integer.
PASSwriter.closed should resolve after readable is canceled during start
PASSwriter.closed should resolve after readable is canceled with backpressure
PASSwriter.closed should resolve after readable is canceled with no backpressure
PASScancelling the readable should cause a pending write to resolve
FAILcancelling the readable side of a TransformStream should abort an empty pipeassert_unreached: Should have rejected: promise returned from pipeTo() should be rejected Reached unreachable code
FAILcancelling the readable side of a TransformStream should abort an empty pipe after startupassert_unreached: Should have rejected: promise returned from pipeTo() should be rejected Reached unreachable code
FAILcancelling the readable side of a TransformStream should abort a full pipepromise_rejects_exactly: promise returned from pipeTo() should be rejected function "function() { throw e; }" threw object "TypeError: The readable side of this TransformStream is no longer readable."…

bundle built 2026-07-16T07:16:48.063Z