MVC Controller Unit Test

Question

I am trying to test my controller and quite new to this testing. Using NUnit and Moq I keep getting a null result. Here is my test, am I missing a step? like I mentioned it's my first project.

[TestFixture]
class CustomerServiceTests
{
    public Mock<IRepository<Customer>> CustomerRepository = new Mock<IRepository<Customer>>(); 

    public Customer Customer;

    [SetUp]
    public void Setup()
    {
        Customer = new Customer()
        {
            Id = 1 << Can I set the ID?
            Address = "3 Lakeview Terrace",
            City = "New York",
            Email = "[email protected]",
            FirstName = "Joe",
            LastName = "Dirt",
            Phone = "888-888-8888",
            Province = "NY"
        };         
    }


    [Test]
    public void CanCreateCustomer()
    {
        // ARRANGE
        var controller = new CustomerController(CustomerRepository.Object);
        controller.Create(Customer);

        // ACT
        var customer = CustomerRepository.Setup(c => c.Find(1)).Returns(new Customer());

        // ASSERT
        Assert.AreEqual(Customer, customer);
    }      
}

CONTROLLER

// POST: /Customer/Create
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(Customer customer)
    {
        if (ModelState.IsValid)
        {
            _customerRepository.Add(customer);
            return RedirectToAction("Index");
        }
        return View(customer);
    }

IREPOSITORY

public interface IRepository<T>  where T : class 
    {
        IQueryable<T> Get { get; }
        T Find(object[] keyValues);
        T Find(int id);
        void Add(T entity);
        void Update(T entity);
        void AddOrUpdate(T entity);
        void Remove(object[] keyValues);
        void Remove(T entity);

    }

Rikard · Accepted Answer · 2013-10-11 07:27:10Z

2

Your test method should look like this:

[Test]
public void CanCreateCustomer()
{
    // ACT
    var controller = new CustomerController(CustomerRepository.Object);
    controller.Create(Customer);

    // VERIFY
    CustomerRepository.Verify(c => c.Add(It.Is.Any<Customer>(),Times.Once()));
}

To add an error to the modelstate you can do it like this:

controller .ModelState.AddModelError("key", "error message");

Otherwise the modelState is valid.

answered Oct 11, 2013 at 7:27

Rikard

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4 Comments

devfunkd Over a year ago

Thank you! Just need to figure out how you Assert the view. :)

Rikard Over a year ago

What do you want to test then? The content in the view or which view you are returning?

devfunkd Over a year ago

both eventually, but right now just what view is being returned.

Rikard Over a year ago

Created a new post for test the returning view, to test the content is harder and not so usual. Maybe you want to know what kind of type you returned and it's data.

Rikard · Accepted Answer · 2013-10-11 18:50:49Z

To test the viewName you need to change your code a little bit.

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(Customer customer)
{
    if (ModelState.IsValid)
    {
        _customerRepository.Add(customer);
        return RedirectToAction("Index");
    }
    return View("Create", customer);
}

Test:

[Test]
public void ReturnView()
{
   // ACT
   var controller = new CustomerController(CustomerRepository.Object);
   var result = controller.Create(Customer);

   // ASSERT
   Assert.AreEqual("Create", ((ViewResult)result).ViewName);
}

To test the returned data:

[TestMethod]
public void TestMethod2()
{
    var controller = new CustomerController();
    var result = controller.Create(Customer);

    Assert.AreEqual(1, ((Asd)((ViewResult)result).ViewData.Model).Id);
 }

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