zszq-trs/UnitTestProject/Modules/EodModule/BondPaymentServiceCalculationTest.cs

using YLErp.DBModels;
namespace YLErp.Modules.EodModule
{
    [TestClass]
    public class BondPaymentServiceCalculationTest
    {
        private static BondPaymentService CreateService()
        {
            return new BondPaymentService(
                new OptUserInfo(0, nameof(BondPaymentServiceCalculationTest), OptUserFrom.UnitTest));
        }

        [TestMethod]
        public void CalcPayment_BondCoupon_KeepsPerHundredScale()
        {
            var payments = new List<BondPayment>
            {
                new BondPayment { payment_interest = 1m }
            };

            // 债券票息 1 表示每 100 元面值付 1 元：1 * 1000 / 100 = 10。
            var actual = CreateService().CalcPayment(
                payments,
                qty: 1000m,
                longRatio: 1m,
                payDirection: 1m);

            Assert.AreEqual(10m, actual);
        }

        [TestMethod]
        public void CalcPayment_CorporateActionDividend_UsesPerTenScale()
        {
            var payments = new List<BondPayment>
            {
                new BondPayment { payment_interest = 10m, IsCorporateActionCashDividend = true }
            };

            // GiveCashAmount=10（每 10 份派 10）时，payment_interest 直接存 10；
            // 持仓 1000 份的现金分红 = 10 * 1000 / 10 = 1000，不能再套债券报价的 /100 换算。
            var actual = CreateService().CalcPayment(
                payments,
                qty: 1000m,
                longRatio: 1m,
                payDirection: 1m);

            Assert.AreEqual(1000m, actual);
        }

        [TestMethod]
        public void CalcPayment_FundMixedBondPaymentAndCorporateAction_UsesEachRecordScale()
        {
            var payments = new List<BondPayment>
            {
                // bond_payment_info：每 100 份付 2，200000 份应为 4000。
                new BondPayment { payment_interest = 2m },
                // ex_dividend_info：每 10 份派 10，200000 份应为 200000。
                new BondPayment { payment_interest = 10m, IsCorporateActionCashDividend = true }
            };

            var actual = CreateService().CalcPayment(
                payments,
                qty: 200000m,
                longRatio: 1m,
                payDirection: 1m);

            Assert.AreEqual(204000m, actual);
        }

        [TestMethod]
        public void CalcPayment_CorporateActionUsesPreCorporateActionQuantity()
        {
            var payments = new List<BondPayment>
            {
                new BondPayment { payment_interest = 2m },
                new BondPayment { payment_interest = 10m, IsCorporateActionCashDividend = true }
            };
            var method = typeof(BondPaymentService).GetMethod(
                nameof(BondPaymentService.CalcPayment),
                new[] { typeof(List<BondPayment>), typeof(decimal), typeof(decimal), typeof(decimal), typeof(decimal?) });

            Assert.IsNotNull(method, "公司行为现金分红需要支持单独传入除权前数量。");
            var actual = (decimal)method.Invoke(CreateService(), new object[] { payments, 2000m, 1m, 1m, (decimal?)1000m });

            Assert.AreEqual(1040m, actual, "原生付息按当前 2000 份计算为 40，公司行为分红按除权前 1000 份计算为 1000。");
        }
    }
}