Boone Gorges 26a5e78d94 Improve testability and coverage of wp_ext2type().
* Following pattern of `wp_get_mime_types()`, introduce `wp_get_ext_types()` function. New function returns a filtered list of file types with their extensions.
* Use this function in new tests for `wp_ext2type()`.

Props borgesbruno.
Fixes #35987.

git-svn-id: https://develop.svn.wordpress.org/trunk@37189 602fd350-edb4-49c9-b593-d223f7449a82
2016-04-13 03:11:25 +00:00
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