[wp-trac] [WordPress Trac] #43228: register_theme_directory() needs to delete the `theme_roots` transient

[WordPress Trac]

#43228: register_theme_directory() needs to delete the `theme_roots` transient
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 Reporter:  johnbillion               |       Owner:
     Type:  defect (bug)              |      Status:  new
 Priority:  normal                    |   Milestone:  Awaiting Review
Component:  Themes                    |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Changes (by soulseekah):

 * keywords:  needs-unit-tests has-patch => has-patch has-unit-tests


Comment:

 Why not use `wp_clean_themes_cache()` instead? It gives us the benefit of
 regenerating the cache and clearing the theme updates cache in case the
 newly added directly contains outdated themes.

 Both versions make the tests pass. The test fails without the patches.

 Added tests.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43228#comment:2>
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