- From: Gérard Talbot <css21testsuite@gtalbot.org>
- Date: Tue, 2 Mar 2010 09:03:53 -0800
- To: "Melissa Newman" <melissa@newmanfamily.org>
- Cc: public-css-testsuite@w3.org
Melissa, > how > can anybody realistically tell the difference, with the naked eye, > between a > tab, 8 single white spaces, 16 half white spaces, or 4 double white > spaces? > You can't, I agree with you. Testcases should avoid relying on/expecting the tester counting and figuring out how many white spaces (of various kinds) there is. This is the same problem with testcases which expect the tester to be able to see, measure (or compare) a 9px (or 12px or 18px) difference between 2 objects with the naked eye. > Plus, we should have images that are exact measurements. One for mm, > one > for inches, etc. So if an end result of a test is supposed to have a > space > of 10mm, the tester can clearly see that the end results are 10 mm. Creating custom (vertical and horizontal) measurement rulers (for in, mm, cm, px, etc.) is rather easy to do. I have submitted 2 for the test suite. What is unacceptable is that a few testcases expect user agents to be able to render distance like 2.54mm (9.6px) or 15.24mm (or 57.6px) precisely and then ask/invite the tester to check if there is red in the page. There is no normative restraint or requirement regarding how fraction of a pixel is supposed to be handled by user agents. Each/all user agents have implementation limits and various capability limitations. regards, Gérard -- Contributions to the CSS 2.1 test suite: http://www.gtalbot.org/BrowserBugsSection/css21testsuite/ CSS 2.1 test suite (alpha 1; January 27th 2010): http://www.w3.org/Style/CSS/Test/CSS2.1/20100127/html4/toc.htm CSS 2.1 test suite contributors: http://test.csswg.org/source/contributors/
Received on Tuesday, 2 March 2010 17:04:39 UTC