SimpletestTest.php

<?php

namespace Drupal\Tests\simpletest\Functional;

use Drupal\Tests\BrowserTestBase;

/**
 * Basic functionality of the Testing module.
 *
 * @group simpletest
 */
class SimpletestTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'simpletest',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Test that we can uninstall the module without mishap.
     *
     * Upon uninstall, simpletest will clean up after itself. This should neither
     * break the test runner's expectations, nor cause any kind of exception.
     *
     * Note that this might break run-tests.sh test runs that don't use the
     * --sqlite argument.
     */
    public function testUninstallModule() {
        
        /* @var $installer \Drupal\Core\Extension\ModuleInstallerInterface */
        $installer = $this->container
            ->get('module_installer');
        $this->assertTrue($installer->uninstall([
            'simpletest',
        ]));
    }

}