SingleResult和UnitTesting

Question

我BaseApiController班上有以下方法:

public virtual HttpResponseMessage GetById(int id)
{
   var entity = repository.GetById(id);

   if (entity == null)
   {                
     var message = string.Format("No {0} with ID = {1}", GenericTypeName, id);
     return ErrorMsg(HttpStatusCode.NotFound, message);
   }

   return Request.CreateResponse(HttpStatusCode.OK, SingleResult.Create(repository.Table.Where(t => t.ID == id)));
}

我正在使用SingleResultOData请求(因为$expand如果我不创建SingleResult,单个实体不起作用).
但是现在我在具体控制器(例如AddressApiController)上遇到了这个方法的UnitTests问题.我总是得到NULL结果:

[TestMethod]
public void Get_By_Id()
{
    //Arrange
    var moq = CreateMockRepository();
    var controller = new AddressApiController(moq);
    controller.Request = new HttpRequestMessage()
    controller.Request.SetConfiguration(new HttpConfiguration())
    // Action
    HttpResponseMessage response = controller.GetById(1);
    var result = response.Content.ReadAsAsync<T>().Result;

    // Accert
    Assert.IsNotNull(result);
} 

我检查并调试GetById()并发现repository.Table.Where(t => t.ID == id))返回正确的值,但在SingleResult.Create我得到之后NULL.

我怎么解决这个问题？如何从SingleResult中读取内容或使用其他内容？

Answer 1

我创建了扩展：

public static class HttpResponseMessageExtensions
    {
        public static IQueryable<T> ContentToQueryable<T>(this HttpResponseMessage response) where T : BaseEntity
        {
            var objContent = response.Content as ObjectContent;
            return objContent?.Value as IQueryable<T>;
        }

        public static T ContentToEntity<T>(this HttpResponseMessage response) where T : BaseEntity
        {
            var objContent = response.Content as ObjectContent;
            return objContent?.Value as T;
        }
    }

进而：

 var result = response.ContentToEntity<T>();