WebAPI2 Unit Testing with IHttpActionResult

BookController.cs

// GET api/books
public IHttpActionResult Get()
{
    return Ok(_repository.GetBooks().AsEnumerable());
}
  
// GET api/books/1
public IHttpActionResult Get(int id)
{
    var book = _repository.GetBook(id);
  
    if (book == null)
    {
        return NotFound();
    }
  
    return Ok(book);
}

// PUT api/books/1
public IHttpActionResult Put(int id, Book book)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }
 
    return Ok(_repository.UpdateBook(book));
}

// POST api/books
public IHttpActionResult Post(Book book)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    var newBook = _repository.AddBook(book);
    return CreatedAtRoute("DefaultApi", new { newBook.Id }, newBook);
}

Test_BookController.cs

[TestMethod]
public void GetShouldReturnAllBooks()
{
    var controller = new BooksController();
    var actionResult = controller.Get();
    var response = actionResult as OkNegotiatedContentResult<IEnumerable<Book>>;
    Assert.IsNotNull(response);
    var books = response.Content;
    Assert.AreEqual(1, books.Count());
}

[TestMethod]
public void GetWithIdItShouldReturnThatBook()
{
    var controller = new BooksController();
    var actionResult = controller.Get(1);
    var response = actionResult as OkNegotiatedContentResult<Book>;
    Assert.IsNotNull(response);
    Assert.AreEqual(1, response.Content.Id);
}

[TestMethod]
public void PutShouldUpdateBook()
{
    var controller = new BooksController();
    var book = new Book { Id = 1, Title = "asp.net webapi2", Author = "scott" };
    var actionResult = controller.Put(book.Id, book);
    var response = actionResult as OkNegotiatedContentResult<Book>;
    Assert.IsNotNull(response);
    var newBook = response.Content;
    Assert.AreEqual(1, newBook.Id);
    Assert.AreEqual("asp.net webapi2", newBook.Title);
    Assert.AreEqual("scott", newBook.Author);
}

[TestMethod]
public void PostShouldAddBook()
{
    var controller = new BooksController();
    var actionResult = controller.Post(new Book
    {
        Title = "asp.net webapi2",
        Author = "scott"
    });
    var response = actionResult as CreatedAtRouteNegotiatedContentResult<Book>;
    Assert.IsNotNull(response);
    Assert.AreEqual("DefaultApi", response.RouteName);
    Assert.AreEqual(response.Content.Id, response.RouteValues["Id"]);
}

test

test

test

Nice. Thanks.

very good thank you

Excelent!

Hi,
Why there is no test for return BadRequest(ModelState); ?

Here is the code to unit test BadRequest
//Controller
public IHttpActionResult GetTeamMembersForCustomer(Guid custid)
{
try
{
if (custid == Guid.Empty)
{
return BadRequest("CustomerId is null");
}
return Ok(_customerTeamMemberService.GetTeamMembersForCustomer(custid));
}
catch (Exception ex)
{
throw ex;
}
}
// Unit test Methods
public void Get_CustomerTeamMember_ByNonExistingId_empty()
{
try
{
// Act
IHttpActionResult result = _customersTeamMemberController.GetTeamMembersForCustomer(Guid.Empty);

           var conNegResult = result as BadRequestErrorMessageResult;
           
            //Assert
            Assert.IsTrue(true);
            Assert.IsNotNull(conNegResult.Message);
            Assert.AreEqual(conNegResult.Message, "CustomerId is null");
        }
        catch (Exception ex)
        {
            Assert.IsFalse(true,ex.Message);
        }
    }

I am getting error like "The type APIController is defined in an assembly that is not referenced.Please help me in that