Writing test using Mock

Question

User-1000104858 posted

Hi!

I try to write a test to verify that my function works as expected but i cant get it to work. I use LazyCache(https://www.nuget.org/packages/LazyCache.AspNetCore/2.0.0-beta03) to cache data in my asp.net core 2.1 website. I have this:

    [TestClass]
    public class MainTest
    {
        [TestMethod]
        public void Test1()
        {
                var s = new DataHelper(new Mock<ICacheHelper>().Object);
                var data = s.GetDashboard("demo");
                Assert.IsTrue(data.Name == "demo");
        }
    }

    public interface IDataHelper
    {
        Dashboard GetDashboard(string name);
    }

    public class DataHelper : IDataHelper
    {
        private readonly ICacheHelper _cache;

        public DataHelper(ICacheHelper cache)
        {
            _cache = cache;
        }

        public Dashboard GetDashboard(string name)
        {
                Dashboard dbFunc() => GetDashboardData(name);
                return _cache.GetOrAddDashboard(name, dbFunc);
        }
	private Dashboard GetDashboardData(string name) {
		return new Dashboard { Name = "demo" };
	}
    }

    public interface ICacheHelper
    {
        Dashboard GetOrAddDashboard(string name, Func<Dashboard> dbFunc);
    }

    public class CacheHelper : ICacheHelper
    {
        private readonly IAppCache _cache;

        public CacheHelper(IAppCache cache)
        {
            _cache = cache;
        }

        public Dashboard GetOrAddDashboard(string name, Func<Dashboard> dbFunc)
        {
            return _cache.GetOrAdd("dashboard:" + name, dbFunc);
        }
   }

When i run this, data.Name = null. I set breakpoints where i marked the code with blue color but they never hits. When i run my website, there is no problem but how can i write a test to verify this function?