https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21AssertContentTrait.php/function/AssertContentTrait%3A%3AassertThemeOutput/11.x
function AssertContentTrait::assertThemeOutput | Drupal API
functiondrupalapi
https://api.drupal.org/api/drupal/modules%21simpletest%21drupal_web_test_case.php/function/DrupalWebTestCase%3A%3AassertThemeOutput/7.x
function DrupalWebTestCase::assertThemeOutput | Drupal API
functiondrupalapi