Support for Zero-Coupon Bond about financepy HOT 4 CLOSED

class TestBond:
    @pytest.fixture(scope='class')
    def global_data(self):
        # A 3 months treasure with 0 coupon per year.
        bill = Bond(
            issue_date=Date(25, 7, 2022),
            maturity_date=Date(24, 10, 2022),
            coupon=0,
            freq_type=FrequencyTypes.SIMPLE,
            accrual_type=DayCountTypes.ACT_ACT_ICMA
        )

        settlement_date = Date(8, 8, 2022)
        return {
                'bill': bill,
                'date': settlement_date
        }

    def test_yield_to_maturity_no_coupon(self, global_data):
        bond = global_data['bill']
        assess_date = global_data['date']
        clean_price = 99.7056
        assert bond.yield_to_maturity(assess_date, clean_price, YTMCalcType.US_STREET) * 100 == \
               pytest.approx(1.3998)