using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;

namespace Falcon.SugarApi.Test
{
    [TestClass]
    public class IGetDataTimeNowTest
    {
        [TestMethod]
        public void nowTest() {
            var year = DateTime.Now.Year;
            Console.WriteLine($"base year {year}");
            var ic1 = new c1();
            Console.WriteLine($"c1 year {ic1.now.Year}");
            var ic2 = new c2();
            Console.WriteLine($"c2 year {ic2.now.Year}");
            var ic3 = new c3();
            Console.WriteLine($"c3 year {ic3.now.Year}");
            Assert.IsTrue(ic1.now.Year == year);
            Assert.IsTrue(ic3.now.Year == year);
            Assert.IsTrue(ic2.now.Year == year + 1);
        }
    }

    public class c1
    {
        public c1() {
            this.now = this is IGetDataTimeNow gdn ? gdn.GetDataTimeNow() : DateTime.Now;
        }
        public DateTime now { get; set; }
    }

    public class c2:c1, IGetDataTimeNow
    {
        public DateTime GetDataTimeNow() {
            return DateTime.Now.AddYears(1);
        }
    }

    public class c3:c1 { }
}