Edited Issue: Testing ApiController using Url helpers or ObjectContent is too hard [852]

Here is the code I am trying to test:

```
public HttpResponseMessage Post(WriteDocument document)
{
var response = new HttpResponseMessage(HttpStatusCode.Created);
var id = Create(reader.Read(document), response);
response.Headers.Location = new Uri(Url.Link(this.routeName, new { controller = this.ControllerName, id = id }));
return response;
}

public HttpResponseMessage Put(int id, WriteDocument document)
{
var response = new HttpResponseMessage();
var data = this.Update(id, reader.Read(document), response);
response.Content = GetDocumentContent(writer.Write(new TData[]{data}));
return response;
}

```

and here are my tests:

```
[Fact]
public void WhenPostingShouldSetLocationHeader()
{
controller.Request.Method = HttpMethod.Post;
var response = controller.Post(testWriteDocument);
response.Headers.Location.AbsoluteUri.ShouldEqual("http://localhost/test/1");
}

[Fact]
public void WhenPutShouldReturnDocument()
{
controller.Request.Method = HttpMethod.Put;
var response = controller.Put(1,testWriteDocument);
var value = response.Content.ReadAsAsync<ReadDocument>().Result;
value.Collection.Href.AbsoluteUri.ShouldEqual("http://test.com/");
}
```

And here is the davinci work of art to setup my tests.
```
private void Configure()
{
var request = new HttpRequestMessage(HttpMethod.Get, "http://localhost/test/");
var config = new HttpConfiguration();
config.Formatters.Add(new CollectionJsonFormatter());
var route = config.Routes.MapHttpRoute("DefaultApi", "{controller}/{id}", new { id = RouteParameter.Optional });
var routeData = new HttpRouteData(route, new HttpRouteValueDictionary { { "controller", "test" } });

controller = new TestController();
controller.ControllerContext = new HttpControllerContext(config, routeData, request);
controller.ControllerContext.ControllerDescriptor = new HttpControllerDescriptor(config, "test", typeof(TestController));
controller.Request = request;
controller.Request.Properties[HttpPropertyKeys.HttpConfigurationKey] = config;
controller.Request.Properties.Add(HttpPropertyKeys.HttpRouteDataKey, routeData);
}
```

This type of code is not at all intuitive. I would expect to write no more than 2 or 3 lines (ideally 1) of setup to make this work. The scenario itself is something that is quite common.