'Scenario: if the instructor uploads a csv file with no cohort column, an error message is presented.
Given I have a course with cohorting enabled
When I go to the cohort management section of the instructor dashboard
And I upload a CSV file that is missing the cohort column
Then I get an error message stating that the file must have a cohort column'

def test_cohort_by_csv_missing_cohort(self):

    self.cohort_management_page.upload_cohort_file('cohort_users_missing_cohort_column.csv')
    self._verify_cohort_by_csv_notification("The    file    must    contain    a    'cohort'    column    containing    cohort    names.")
