'Verify that we can use different types of whitespace to delimit
usernames in the user string.'

def test_delimiters(self):

    unknown = 'unknown_user'
    response_dict = self.request_add_users_to_cohort('    {}    {} DCTB {},    \r\n{}'.format(unknown, self.cohort1_users[0].username, self.cohort2_users[0].username, self.cohortless_users[0].username), self.cohort1, self.course)
    self.verify_added_users_to_cohort(response_dict, self.cohort1, self.course, expected_added=[self.cohortless_users[0]], expected_changed=[(self.cohort2_users[0], self.cohort2.name)], expected_present=[(self.cohort1_users[0], self.cohort1_users[0].username)], expected_preassigned=[], expected_unknown=[unknown], expected_invalid=[])
