Unit Test for checking IEnumerable <dynamic> content

Question

Given the following WebAPI method:

public IHttpActionResult GetDeliveryTypes()
{
    return Ok(... .Select(dt => new { Id = dt.Id, Name = dt.Name }));
}

Where

typeof(Id) = long  
typeof(Name) = string

During unit testing, how can I

• Claim that the content is what I expect? For example, the following statement fails

  var contentResult = response as OkNegotiatedContentResult<IEnumerable<dynamic>>;
  Assert.IsNotNull(contentResult);
  

• Reduce the result IEnumerable<dynamic>to IEnumerable<long>so that I can make sure that it contains the expected sequence of values?

I already added an attribute InternalsVisibleToto AssemblyInfo.

Answer 1

1. Something to start:

response.GetType().GetGenericTypeDefinition() == typeof(OkNegotiatedContentResult<>)

You can continue to research type here if you want.

2. The solution for the second point is quite simple:

dynamic response = controller.GetDeliveryTypes();
Assert.True(response.GetType().GetGenericTypeDefinition() == typeof(OkNegotiatedContentResult<>));
var content = (IEnumerable<dynamic>)response.Content;
var ids = content.Select(i => i.Id).ToList();

- [assembly: InternalsVisibleTo("TestAssembly")], .