test_interest.py 文件源码

def test_pay(self):
        b = Mock(spec_set=_BillingPeriod)
        b_next = Mock(spec_set=_BillingPeriod)
        type(b_next).payment_date = PropertyMock(return_value=date(2017, 1, 15))
        type(b).next_period = PropertyMock(return_value=b_next)
        i = Mock(spec_set=_InterestCalculation)
        p = Mock(spec_set=_MinPaymentFormula)
        cls = CCStatement(
            i, Decimal('1.23'), p, b,
            end_balance=Decimal('1.50'), interest_amt=Decimal('0.27')
        )
        mock_stmt = Mock(spec_set=CCStatement)
        with patch(
            'biweeklybudget.interest.CCStatement.next_with_transactions',
            autospec=True
        ) as m:
            m.return_value = mock_stmt
            res = cls.pay(Decimal('98.76'))
        assert res == mock_stmt
        assert m.mock_calls == [
            call(cls, {date(2017, 1, 15): Decimal('98.76')})
        ]