This test requires a site which allows plugins to be installed from within the site. (The QA testing site cannot be used for this test, since plugin installation is disabled.)

1. Go to the Moodle plugins directory https://moodle.org/plugins and choose a plugin with a Download button, such as https://moodle.org/plugins/local_codechecker, and download the ZIP file
2. Login to your Moodle site as an admin and go to Administration > Site administration > Plugins > Install plugins
3. Upload the ZIP file
4. Plugin type should automatically be selected, if the plugin declares $plugin->component in its version.php, else select manually.
5. Check that you obtain a 'Validation passed!' message, then click the button 'Install plugin'.
6. Check that the plugin is installed successfully and appears in the list Administration > Site administration > Plugins > Plugins overview
7. Try uninstalling the newly installed plugin by clicking the Uninstall link opposite the plugin
8. If Moodle itself was not able to remove the plugin directory, use a file manager to do so as instructed
9. Check that the plugin is no longer listed on Administration > Site administration > Plugins > Plugins overview.