class AdvaggTestBase

abstract class AdvaggTestBase extends WebTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'advagg',
    ];
    
    /**
     * A user with permission to administer site configuration.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $user;
    
    /**
     * Editable Advagg configuration.
     *
     * @var \Drupal\Core\Config\Config
     */
    protected $config;
    
    /**
     * Editable system configuration.
     *
     * @var \Drupal\Core\Config\Config
     */
    protected $systemConfig;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->user = $this->drupalCreateUser([
            'administer site configuration',
        ]);
        $this->drupalLogin($this->user);
        $this->config = \Drupal::configFactory()->getEditable('advagg.settings');
        // Enable aggregation.
        $this->systemConfig = \Drupal::configFactory()->getEditable('system.performance');
        $this->systemConfig
            ->set('css.preprocess', TRUE)
            ->set('js.preprocess', TRUE)
            ->save();
    }

}