'Test the _write_calc_pr() method with non-default calc id.'

def test_write_calc_pr(self):

    self.workbook.set_calc_mode('auto', 12345)
    self.workbook._write_calc_pr()
    exp = '<calcPr    calcId="12345"    fullCalcOnLoad="1"/>'
    got = self.fh.getvalue()
    self.assertEqual(got, exp)
