asp.net mvc - Web API, OData, $inlinecount and testing

Question

I previously had a Web API controller that looked like this:

    public IQueryable<ApiDesignOverview> GetList(
        string brandIds = "", 
        string categoryIds = "", 
        string query = "",
        string categoryOp = "or")

I heard that the OData NuGet package now supports the $inlinecount OData parameter, so I tried to add it using the instructions from http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/supporting-odata-query-options - I don't want to have to use OData wholesale as that would entail a large amount of re-architecturing of the app, so I went for the PageResult<T> option.

So now my controller looks like this:

    public PageResult<ApiDesignOverview> GetList(
        ODataQueryOptions<ApiDesignOverview> options,
        string brandIds = "", 
        string categoryIds = "", 
        string query = "",
        string categoryOp = "or")

My problems are now:

• How do I mock a ODataQueryOptions for unit testing?
• If they can't be mocked, how do I create one? I need a ODataQueryContext to construct one, which requires a Microsoft.Data.Edm.IEdmModel, which requires... what? I can't find any documentation for this.

Really, it would be better if I could remove the ODataQueryOptions from the controller signature like before. Is this possible?

Answer 1

If you do not (or cannot as in my case) want to change away from using ODataQueryOptions and PageResult, here is how you can create an ODataQueryOptions instance for unit tests:

//arrange
var request = new HttpRequestMessage(HttpMethod.Get, "http://localhost/MyProject/api/Customers?$filter=CustomerID eq 1");
var controller = new CustomersController
{
    Request = request
};

ODataModelBuilder modelBuilder = new ODataConventionModelBuilder(); 
modelBuilder.EntitySet<Customer>("Customers"); 
var opts = new ODataQueryOptions<Customer>(new ODataQueryContext(modelBuilder.GetEdmModel(),typeof(Customer)), request);

//act
var result = controller.Get(opts);

//assert
Assert.AreEqual(1, result.Items.First().CustomerID);