using Microsoft.VisualStudio.TestTools.UnitTesting;
using YLErp.Helpers;
using YLErp.Model;

namespace UnitTestProject.Modules
{
    /// <summary>
    /// EQD-6953 疑似到期债券值域闸门：IsMaturedDegenerate / IsResultAbsurd 分支覆盖。
    /// 场景来源：UAT 060203.IB（2006年国债，2026估值日已无剩余现金流）——
    /// jquantlib 对空现金流求解得 ytm=0、净/全价均为面值100，errCode=0"成功但退化"。
    /// 与前端 swapCalc.js::getBondCalcErrorMessage 的同款闸门保持一致口径。
    /// </summary>
    [TestClass]
    public class BondCalcHeplerTest
    {
        [TestMethod]
        public void 到期退化值_三条件同时成立_命中()
        {
            var r = new CalBondResult { cleanPrice = 100m, dirtyPrice = 100m, ytm = 0m };
            Assert.IsTrue(BondCalcHepler.IsMaturedDegenerate(r));
        }

        [TestMethod]
        public void 正常券_不命中_按UAT实测180205IB()
        {
            var r = new CalBondResult { cleanPrice = 97.43300000000002m, dirtyPrice = 100.00001369863016m, ytm = 6.738278242318886m };
            Assert.IsFalse(BondCalcHepler.IsMaturedDegenerate(r));
        }

        [TestMethod]
        public void ytm为0但净价非面值_不命中_真实零息平价券场景()
        {
            var r = new CalBondResult { cleanPrice = 99.5m, dirtyPrice = 100m, ytm = 0m };
            Assert.IsFalse(BondCalcHepler.IsMaturedDegenerate(r));
        }

        [TestMethod]
        public void 价格为面值但ytm非0_不命中_正常息票平价券场景()
        {
            var r = new CalBondResult { cleanPrice = 100m, dirtyPrice = 100.5m, ytm = 3.2m };
            Assert.IsFalse(BondCalcHepler.IsMaturedDegenerate(r));
        }

        [TestMethod]
        public void ytm为null_不命中()
        {
            var r = new CalBondResult { cleanPrice = 100m, dirtyPrice = 100m, ytm = null };
            Assert.IsFalse(BondCalcHepler.IsMaturedDegenerate(r));
        }

        [TestMethod]
        public void IsResultAbsurd_到期退化值_命中并带原因()
        {
            var r = new CalBondResult { cleanPrice = 100m, dirtyPrice = 100m, ytm = 0m };
            var ok = typeof(BondCalcHepler)
                .GetMethod("IsResultAbsurd", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static)
                .Invoke(null, new object[] { r, null });
            Assert.IsTrue((bool)ok);
        }
    }
}