'Test the _convert_date_time() method with date objects.'

def test_convert_date_time_date(self):

    for excel_date in self.excel_dates:
        date_str = excel_date[0].rstrip('T')
        (year, month, day) = date_str.split('-')
        test_date = datetime.date(int(year), int(month), int(day))
        got = self.worksheet._convert_date_time(test_date)
        exp = excel_date[1]
        self.assertEqual(got, exp)
