[Webkit-unassigned] [Bug 211891] New: [css-flexbox] WPT test css/css-flexbox/flexbox_direction-row-reverse.html fails on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211891

            Bug ID: 211891
           Summary: [css-flexbox] WPT test
                    css/css-flexbox/flexbox_direction-row-reverse.html
                    fails on Mac
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com

The WPT test css/css-flexbox/flexbox_direction-row-reverse.html (imported/w3c/web-platform-tests/css/css-flexbox/flexbox_direction-row-reverse.html) fails on Mac due to small differences in how the test font its rendered:

Check the diff: https://wpt.fyi/analyzer?screenshot=sha1%3A49959e251d81e5e1b670007fb2b16f987ffc3cb8&screenshot=sha1%3Aa0079d4c058551db56b11d3caed6e736abffc876

This issue doesn't happen on other ports like iOS or GTK.

The test imported/w3c/web-platform-tests/css/css-flexbox/flexbox_direction-row-reverse.html and css3/flexbox/csswg/flexbox_direction-row-reverse.html are in theory the same and should be de-duplicated.

However, in r180652 we did a change to css3/flexbox/csswg/flexbox_direction-row-reverse.html that was never exported to WPT so we ended with two different copies of the test.

The change done in r180652 is about using Ahem font instead of a normal font to the test.

Ideally we should:

 - Replace imported/w3c/web-platform-tests/css/css-flexbox/flexbox_direction-row-reverse.html with css3/flexbox/csswg/flexbox_direction-row-reverse.html
 - Export the changes done in r180652 to WPT

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