public void _UpdateTodo_Updates_one_Todo_And_Returns_A_PartialView()
{
var todo = todosList.First();
//specify the mockRepo return
_mockRepository.Setup(repo => repo.update(todo)).Returns(1);
//instantiate the controller
var controller = new TodosController(_mockRepository.Object, _logger);
//Call the controller action
var result = controller._UpdateTodo(todo);
//Assert the result
var partialViewResult = Assert.IsType <PartialViewResult>(result);
var model = partialViewResult.Model;
//Assert the model
model.Should().BeEquivalentTo(todo, options => options.ComparingByMembers <ToDoItemModel>());
}