Builtin Date locale's methods ignore locale argument #572
Description
What?
One of the k6's users reported that using the Date().toLocaleDateString() always returns the date in the same format.
Date().toLocaleDateString('en-US') Expect 12/30/2012 : Actual 12/30/2012
Date().toLocaleDateString('en-CA') Expect 2012-12-30 : Actual 12/30/2012
Date().toLocaleDateString('en-GB') Expect 30/12/2012 : Actual 12/30/2012
Date().toLocaleDateString('de-DE') Expect 30.12.2012 : Actual 12/30/2012
It's happening since internally, the only dateLayout_en_GB is used, and we don't take into account any arguments.
Probably, that's not what most users will expect.
Why?
Fixing this will help satisfy users' expectations.