The test itself is reasonable, except that it reads scroll positions
from the main thread. With APZ enabled we need to flush any pending APZ
repaints before reading these scroll positions. So changing the
waitForAllPaints to the APZ-flushing variant makes that happen, and the
test passes.
Depends on D29921
Differential Revision: https://phabricator.services.mozilla.com/D29922
--HG--
extra : moz-landing-system : lando
- Updated smooth scroll behavior mochitest and reftests to
match new CSSOM-View DOM scrolling method parameters.
- Added tests for Element.ScrollBy and Element.ScrollTo.
- Verify that instant scroll-behavior is synchronous.
- Verify that smooth scroll-behavior is asynchronous.
- Verify that smooth scroll-behavior is triggered by CSSOM-View DOM methods.
- Verify that instant scroll-behavior interrupts smooth scroll-behavior
animation.
- Verify that smooth scroll-behavior is not framerate dependant.
- Verify that smooth scroll-behavior physics simulations used by animations
converge and allow the animation to reach completion.
- CSSOM-View scroll-behavior smooth scroll animations must produce the same
results indendently of frame-rate:
- Reference samples of scroll position for each frame are captured from a
smooth scroll at 120fps for variations in X-Distance, Y-Distance.
- Test samples are captured from an animation with the same parameters at
varying framerates.
- Variance in position at each sampled interval is compared to the 120fps
reference. To pass the test, the position of each test sample must match
the reference position with a tolerance of one test sample frame's range
of motion. This range of motion is calculated by the position delta of
the reference samples one test frame duration before and after.
- The duration of the reference sample animation and the test sample
animation must match within 1 frame to pass the test.
- The simulation driving the animation must converge and stop on the
destination position for the test to pass.
--HG--
extra : rebase_source : 194f6c9364e316ea21cf1e74ab6f7542ee94edb8
Kartikaya Gupta
Florian Quèze
David Anderson
Carsten "Tomcat" Book
Kearwood (Kip) Gilbert