namespace Drupal\Tests\Component\Graph;
use Drupal\Component\Graph\Graph;
-use Drupal\Tests\UnitTestCase;
+use PHPUnit\Framework\TestCase;
/**
* @coversDefaultClass \Drupal\Component\Graph\Graph
* @group Graph
*/
-class GraphTest extends UnitTestCase {
+class GraphTest extends TestCase {
/**
* Test depth-first-search features.