1953040 - Make browser_test_position_sticky.js pass with layout.scroll.disable-pixel-alignment=true

Status: ASSIGNED

(Core :: Panning and Zooming, task)

Comment 1

[Hiroyuki Ikezoe (:hiro)]

Attachment: Bug 1953040 - Rewrite browser_test_position_sticky.js with assertSnapshots(). r?botond

With assertSnapshots() we can use our reftest analyzer to visualize the
iamge differences in failure cases. Also we can allow some amount of
image differences.

Comment 2

[Hiroyuki Ikezoe (:hiro)]

Attachment: Bug 1953040 - Allow 1px-line differences with layout.scroll.disable-pixel-alignment=true. r?botond

To restrict the diffrences, we also change the background color of the
position: sticky element and the body element. The position: sticky one
is rgb(0, 1, 0) and the body is rgb(0, 0, 0) so that the different
would be just 1.