1651857 - Add web platform tests for prefers-contrast

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, enhancement)

Description

[zekemedley]

Now that we've implemented prefers-contrast behind the layout.css.prefers-contrast.enabled preference we should add some web platform tests for it. As we can't test OS level preferences these will likely test mostly parsing and syntax.

Comment 1

[zekemedley]

Attachment: screenshot of passing tests when this is run in nightly with prefers-contrast enabled

Here's a screenshot of the web platform test passing on nightly with our prefers-contrast implementation enabled. To test this yourself, change the script tags in the wpt to be absolute paths and then open the file in Nightly with layout.css.prefers-contrast.enabled set to true in about:config.

Comment 2

[zekemedley]

Attachment: Bug 1651857 - Add web platform tests for prefers-contrast r=heycam

Because our prefers-contrast implementation is only enabled behind a
layout.css.prefers-contrast.enabled these don't pass out of the
box. Our implementation does pass these tests though when it is
enabled via about:config. See the bugzilla bug for more information.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/de19f5581453
Add web platform tests for prefers-contrast r=heycam

Comment 4

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/24792 for changes under testing/web-platform/tests

Comment 5

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/mozilla-central/rev/de19f5581453

Comment 6

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Upstream PR merged by moz-wptsync-bot