https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21KernelTestBaseTest.php/class/KernelTestBaseTest/8.9.x
class KernelTestBaseTest | Drupal API
classdrupalapi
https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21KernelTestBaseTest.php/function/KernelTestBaseTest%3A%3AtestRender/9
function KernelTestBaseTest::testRender | Drupal API
functiondrupalapi