$this->testUser = $this->drupalCreateUser(['permission']); $this->drupalLogin($this->testUser);
This works fine when testing locally with PhantomJS. However after uploading this code to drupal.org it keeps failing randomly (sometimes 1 test, sometimes 2) with the following error:
User dOGIV5Iu successfully logged in.
Failed asserting that false is true.
This appears to be coming from the assertion in BrowserTestBase::drupalLogin, which should normally check that the user is logged in correctly.
$this->drupalGet('user/login'); $this->submitForm([ 'name' => $account->getUsername(), 'pass' => $account->passRaw, ], t('Log in')); // @see BrowserTestBase::drupalUserIsLoggedIn() $account->sessionId = $this->getSession()->getCookie($this->getSessionName()); $this->assertTrue($this->drupalUserIsLoggedIn($account), new FormattableMarkup('User %name successfully logged in.', ['%name' => $account->getAccountName()]));
How come that a test function does work locally, but not on Drupal.org? Even stranger is that this function is used throughout multiple core tests without issues. And why is this assertion failing randomly?