public async Task EmployeeControllerPostAddClientShouldReturnRedirect()
        {
            //arrange
            var adminController = new AdminController(new FakeDeclarationFormRepository(), new FakeEmployeeRepository(), new FakeClientRepository());


            //act
            var actionResult = await adminController.AddClient(new ClientModel());


            //assert
            Assert.IsInstanceOfType(actionResult, typeof(RedirectToActionResult));
        }
        public async Task EmployeeControllerAddClientViewResultShouldHaveClientModel()
        {
            //arrange
            var adminController = new AdminController(new FakeDeclarationFormRepository(), new FakeEmployeeRepository(), new FakeClientRepository());

            //act
            var actionResult = await adminController.AddClient();

            var viewResult = (ViewResult)actionResult;
            var viewModel  = viewResult.Model;

            //assert
            Assert.IsInstanceOfType(viewModel, typeof(ClientModel));
        }