In Drupal 8, in the function WebTestBase::setUp() sets up user 1 to have rational values:
<?php
// Define information about the user 1 account.
$this->root_user = new UserSession(array(
'uid' => 1,
'name' => 'admin',
'mail' => 'admin@example.com',
'pass_raw' => $this->randomName(),
));
?>The same is not true in Drupal 7's DrupalWebTestCase::setUp(), which means that during tests, user 1 has the following values:
select uid, name, mail from simpletest508334users where uid=1;
+-----+-----------------------+-----------------------+
| uid | name | mail |
+-----+-----------------------+-----------------------+
| 1 | placeholder-for-uid-1 | placeholder-for-uid-1 |
+-----+-----------------------+-----------------------+
1 row in set (0.00 sec)In most cases this will go unnoticed, but it is not unreasonable for modules to _assume_ that all users have a well-formed email address.
Proposed solution:
(1) Create a well-formed email address for user 1 during testing, as in D8
(2) Make sure the email address of user 1 is never placeholder-for-uid-1 to begin with, perhaps use placeholder-for-uid-1@example.com instead? (this second point being outside the scope of this issue though, perhaps)