'Submit extra form with missing data, expect to get failures'

def test_form_missing_extra(self):

    self.step_data['extra'] = {}
    resp = self.post_step('basics')
    self.assertWizardResponse(resp, 'extra')
    resp = self.post_step('extra', session=list(resp._request.session.items()))
    self.assertWizardFailure(resp, 'language')
    self.assertWizardFailure(resp, 'documentation_type')
