[Webkit-unassigned] [Bug 192851] New: Space differences between GTK and Mac ports in tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192851

            Bug ID: 192851
           Summary: Space differences between GTK and Mac ports in tests
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aboya at igalia.com
                CC: mmaxfield at apple.com

Many tests have failures due to small space differences. For instance, LayoutTests/animations/lineheight-animation.html fails in GTK since r184829, where a space was removed. Apparently the space was not being generated (anymore) in the Mac backend, but it still is in the GTK port: in effect, by editing the expectations, the test become green for Mac and at the same time become red in GTK.

Excerpt of LayoutTests/animations/lineheight-animation.html:

This test performs an animation of the line-height property. It tests whether or not we are properly getting the font-size.
<div id="box">
Here is some text. Here is some text. [...]
</div>

Output Mac: This test performs an animation of the line-height property. It tests whether or not we are properly getting the font-size.Here is some text. Here is some text. [...]
Output GTK: This test performs an animation of the line-height property. It tests whether or not we are properly getting the font-size. Here is some text. Here is some text. [...]

This makes me wonder: Should the space be there? What causes platform variations?

Can these be harmonized? I hope we don't need to duplicate (and update accordingly) expectations for each platform with the space variation forever.

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