File: wp-admin/includes/class-wp-site-health-auto-updates.php

Checks if automatic updates are disabled.

Checks if the site supports automatic minor updates.

Checks if we can access files without providing credentials.

Checks if core files are writable by the web user/group.

Checks if the install is using a development branch and can use nightly packages.

WP_Site_Health_Auto_Updates constructor.

Runs tests to determine if auto-updates can run.

Tests if auto-updates related constants are set correctly.

Checks if updates are intercepted by a filter.

Checks if automatic updates are disabled by a filter.

Checks if automatic updates have tried to run, but failed, previously.

Checks if WordPress is controlled by a VCS (Git, Subversion etc).