Bug 103446 – Layout Test http/tests/canvas/canvas-slow-font-loading.html is failing

• Status: NEW
• Component: Tools / Tests

[Robert Kroeger]

The following layout test is failing on Chromium SnowLeopard / Lion

http/tests/canvas/canvas-slow-font-loading.html

Perhaps caused by http://trac.webkit.org/browser/?rev=135888

[Chris Dumez]

Yes, I introduced this test in http://trac.webkit.org/changeset/135888. I'll take a look.

[Chris Dumez]

I checked the diff from:
http://build.webkit.org/results/Chromium%20Mac%20Release%20%28Tests%29/r135890%20%2829113%29/http/tests/canvas/canvas-slow-font-loading-diffs.html

The output is a green rectangle which means that the Ahem font was fully loaded when drawing. slow-ahem-loading.cgi was supposed to delay the font loading long enough so that the fallback font is used.

There are several possible explanations:
1. The Ahem font was cached in a previous test and the font does not need loading any more when canvas-slow-font-loading.html is run (At least some ports clear the cache between tests, I don't know about chromium).
2. The delay in slow-ahem-loading.cgi is not big enough, in which case the test would likely be flaky rather than consistently failing.

[Chris Dumez]

Is the test failing if run alone? If not, that would hint that my font caching assumption is correct.

[noel gordon]

Fails for me locally on chrome mac DRT when run alone.  Output image is a green rectangle.

[Chris Dumez]

(In reply to comment #4)
> Fails for me locally on chrome mac DRT when run alone.  Output image is a green rectangle.

Does increasing the sleep value in slow-ahem-loading.cgi help?

[noel gordon]

I increased it to 3 seconds, no joy.

[noel gordon]

Test is also failing on the mac wk1 bots.

http://build.webkit.org/builders/Apple%20Lion%20Debug%20WK1%20%28Tests%29/builds/4978/steps/layout-test/logs/stdio