https://api.drupal.org/api/drupal/core%21modules%21user%21tests%21src%21Unit%21UserAuthTest.php/property/UserAuthTest%3A%3AtestUser/8.9.x
UserAuthTest::$testUser | Drupal API
testuserdrupalapi
https://community.aneros.com/category/testuser-exp/
TestUser Exp | Aneros Community
testuserexpaneroscommunity
https://api.drupal.org/api/drupal/core%21profiles%21demo_umami%21tests%21src%21Functional%21DemoUmamiProfileTest.php/function/DemoUmamiProfileTest%3A%3AtestUser/11.x
function DemoUmamiProfileTest::testUser | Drupal API
functiontestuserdrupalapi