[wp-trac] [WordPress Trac] #48491: [Theme compatibility] WP/PHP compatibility tests for single site theme updates/activation

[WordPress Trac]

#48491: [Theme compatibility] WP/PHP compatibility tests for single site theme
updates/activation
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 Reporter:  afragen                              |       Owner:
                                                 |  SergeyBiryukov
     Type:  enhancement                          |      Status:  reviewing
 Priority:  normal                               |   Milestone:  5.5
Component:  Site Health                          |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing dev-         |     Focuses:
  feedback early servehappy needs-copy-review    |  administration
  has-screenshots needs-dev-note                 |
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Comment (by SergeyBiryukov):

 Replying to [comment:32 SergeyBiryukov]:
 > There really are a lot of different layers and parts of the themes UI,
 so testing that everything works as expected is non-trivial.

 For future reference:
 * `wp-admin/customize.php`
  * Includes displaying the "Activate & Publish" button in Customizer side
 panel.
 * `wp-admin/includes/ajax-actions.php`
  * `wp_ajax_query_themes()` powers the theme installation screen.
 * `wp-admin/includes/theme.php`
  * `customize_themes_print_templates()` is used for displaying the Theme
 Details modal in the Customizer theme browser.
 * `wp-admin/theme-install.php`
  * Powers the Add Themes screen.
 * `wp-admin/themes.php` has three different templates:
  * The first one (in PHP) is used for displaying the grid on the Themes
 screen when JS is turned off.
  * `#tmpl-theme` is used for displaying the grid on the Themes screen.
  * `#tmpl-theme-single` is used for displaying the Theme Details modal on
 the Themes screen.
 * `wp-includes/customize/class-wp-customize-theme-control.php`
  * `WP_Customize_Theme_Control::content_template()` is used for displaying
 the grid in the Customizer theme browser.

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Ticket URL: <https://core.trac.wordpress.org/ticket/48491#comment:36>
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