'Test the creation of a simple XlsxWriter file with conditional formatting.'

def test_create_file(self):

    workbook = Workbook(self.got_filename)
    worksheet = workbook.add_worksheet()
    format1 = workbook.add_format({'bg_color': '#FFFF00', 'fg_color': '#FF0000', 'pattern': 1})
    worksheet.write('A1', 'Hello', format1)
    worksheet.write('B3', 10)
    worksheet.write('B4', 20)
    worksheet.write('B5', 30)
    worksheet.write('B6', 40)
    worksheet.conditional_format('B3:B6', {'type': 'cell', 'format': format1, 'criteria': 'greater    than', 'value': 20})
    workbook.close()
    self.assertExcelEqual()
