Supporting feature tests directly

liorean liorean at
Thu Mar 26 03:12:47 UTC 2015

As I see it, what might be more desireable than a straight shallow feature
test or feature support reporting feature would be an official versioned
test library, possibly including tests of pure internals, and a new
standard api for asking the engine for the results it gets for running a
certain test or set of tests. The engine could then either have its results
collected at build time and cashed results for that particular build built
into the api, or allow the user to require the result of getting the test
and executing it live, with the issues that comes with that. One possible
result, except the obvious success and fail, is of course that a certain
test didn't exist at the time of the build and thus not tested.

Of course, the earliest something like that could be in the language would
be ECMAScript 7...
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