We have custom tests for the operating system spread across our tests, e.g.: http://dxr.mozilla.org/mozilla-central/search?q=iswindows+path%3Atest&case=false isWindows, gIsWindows, isOSX, gIsOsx, ... We should just expose a property for that to the tests from a single location.
See also bug 1050205 for the mochitest incarnation.
Created attachment 8591960 [details] [diff] [review] Use mozinfo For the reference, this is a patch to use mozinfo in xpcshell tests.
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