Bugzilla

Per bug 1560268, the WPT test contain-size-flexbox-002.html reliably fails on Android.

Reftest-analyzer link:
https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/es9VvBJ4SCOdpkmHLvsamA/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

The testcase has two zero-width boxes with no space between them (which ends up looking like "|"), and the reference case looks the same except it's got space between the two boxes (so it looks like ":").

On Desktop, things look like the testcase (two boxes snugly stacked), except the boxes have some width, which I think come from the scrollbar sizes (since the files have `overflow:scroll` content).  On Android, this content looks very different due to having overlay scrollbars which don't occupy any space - hence the zero-width scrollbars there.

I'm filing this bug to look into the test failure and fix the impl or test (whichever is broken).

Per bug 1560268, the WPT test contain-size-flexbox-002.html reliably fails on Android.

Reftest-analyzer link:
https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/es9VvBJ4SCOdpkmHLvsamA/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

The testcase has two zero-width boxes, vertically stacked, with no space between them (which ends up looking like "|"), and the reference case looks the same except it's got space between the two boxes (so it looks like ":").

On Desktop, things look like the testcase (two boxes snugly stacked), except the boxes have some width, which I think come from the scrollbar sizes (since the files have `overflow:scroll` content).  On Android, this content looks very different due to having overlay scrollbars which don't occupy any space - hence the zero-width scrollbars there.

I'm filing this bug to look into the test failure and fix the impl or test (whichever is broken).