public void GetItemsByInvoice()
{
GetReady("api/{controller}/invoice/{id}");
var response = controller.GetByInvoice(1).ExecuteAsync(CancellationToken.None).Result;
List <ItemModel> dataSet;
var content = response.TryGetContentValue <List <ItemModel> >(out dataSet);
Assert.AreNotEqual(0, dataSet.Count);
}