setMwGlobals( 'wgTmpDirectory', '/hopefully invalid' ); $factory = MediaWikiServices::getInstance()->getTempFSFileFactory(); $this->assertSame( '/hopefully invalid', ( TestingAccessWrapper::newFromObject( $factory ) )->tmpDirectory ); } use TempFSFileTestTrait; private function newFile() { return TempFSFile::factory( 'tmp' ); } }