public void OnGet() { #region Arrange var optionsBuilder = new DbContextOptionsBuilder <ApplicationDbContext>() .UseInMemoryDatabase("InMemoryDb"); var mockDb = new ApplicationDbContext(optionsBuilder.Options); var pageModel = new AddressModel(mockDb); #endregion #region Act var page = pageModel.OnGet(); #endregion #region Assert Assert.Equal( typeof(PageResult), page.GetType()); #endregion }