Asserts correct token replacement in both system message and email.
$trigger: A trigger like 'user_login'.
$account: The user account which triggered the action.
$email_depth: Number of emails to scan, starting with most recent.
function assertSystemMessageAndEmailTokenReplacement($trigger, $account, $email_depth = 1) {
$this
->assertSystemMessageTokenReplacement($trigger, $account);
$this
->assertSystemEmailTokenReplacement($trigger, $account, $email_depth);
}