docs: def assert_headers(context):
      """
         :type context: behave.runner.Context
      """
      expected_headers = [(k, v) for k, v in row_table(context).items()]
      request = httpretty.last_request()
      actual_headers = request.headers.items()
  
      for expected_header in expected_headers:
          assert_in(expected_header, actual_headers)