BackdropWebTestCase::tearDown in core/modules/simpletest/backdrop_web_test_case.php
Delete created files and temporary files directory, delete the tables created by setUp(), and reset the database prefix.
BackdropWebTestCaseCache::tearDown in core/modules/simpletest/backdrop_web_test_case_cache.php
Reset the database prefix and global config.
LocaleLanguageNegotiationInfoFunctionalTest::languageNegotiationUpdate in core/modules/locale/tests/locale.test
Update language types/negotiation information.
module_disable in core/includes/module.inc
Disables a given set of modules.
module_enable in core/includes/module.inc
Enables or installs a given list of modules.
system_install in core/modules/system/system.install
Implements hook_install().
update.php in core/update.php
Administrative page for handling updates from one Backdrop version to another.
UpgradePathTestCase::performUpgrade in core/modules/simpletest/tests/upgrade/upgrade.test
Perform the upgrade.