text: import unittest
  
  from intuitquickbooks.helpers import qb_date_format, qb_datetime_format, qb_datetime_utc_offset_format
  from datetime import datetime, date
  
  
  class HelpersTests(unittest.TestCase):
      def test_qb_date_format(self):
          result = qb_date_format(date(2016, 7, 22))
          self.assertEquals(result, '2016-07-22')
  
      def test_qb_datetime_format(self):
          result = qb_datetime_format(datetime(2016, 7, 22, 10, 35, 00))
          self.assertEquals(result, '2016-07-22T10:35:00')
  
      def test_qb_datetime_utc_offset_format(self):
          result = qb_datetime_utc_offset_format(datetime(2016, 7, 22, 10, 35, 00), '-06:00')
          self.assertEquals(result, '2016-07-22T10:35:00-06:00')
  