ASP.NET WebApi unit testing with Request.CreateResponse

Question

I am trying to write some unit tests for my ApiController and faced some issues. There is a nice extension method called Request.CreateResponse that helps a lot with generat

Answer 1

For Web API 2, you can simply add

controller.Request = new HttpRequestMessage();
controller.Configuration = new HttpConfiguration();

Like so

[TestMethod]
public void GetReturnsProduct()
{
    // Arrange
    var controller = new ProductsController(repository);
    controller.Request = new HttpRequestMessage();
    controller.Configuration = new HttpConfiguration();

    // Act
    var response = controller.Get(10);

    // Assert
    Product product;
    Assert.IsTrue(response.TryGetContentValue(out product));
    Assert.AreEqual(10, product.Id);
}

It's important to set Request and Configuration on the controller. Otherwise, the test will fail with an ArgumentNullException or InvalidOperationException.

See here for more info.