public function setUp()
{
$this->directory = Path::joinWithTemp('directory_class');
mkdir($this->directory, 0777, true);
file_put_contents(Path::join($this->directory, 'file1.txt'), 'test');
file_put_contents(Path::join($this->directory, 'file2.txt'), 'some new file');
}
protected function setUp() { parent::setUp(); \Drupal::config('system.file')->set('default_scheme', 'dummy-remote')->save(); }