Web API控制器方法 - 请求为空

Question

调用下面显示的方法时,Request始终为null.我有一些简单的方法从MVC4 app中的控制器返回JSON数据,控制器使用ApiController作为基类.我的目录函数的代码如下:

public HttpResponseMessage GetDirectory() {
        try {
            var dir = r.GetDirectory();
            if (dir == null) {
                throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError));
            }
            var response = Request.CreateResponse(HttpStatusCode.OK, dir, "application/json");
            response.Headers.Location = new Uri(Request.RequestUri, "directory");
            return response;
        } catch (Exception ex) {
            return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex);
        }
    }

调用此方法时,从r.GetDirectory()正确加载'dir'.但请求为空.所以Request.CreateResponse()自然会失败,等等.我正在寻找Request为null的原因,或者为了允许返回仍为HttpResponseMessage的重写.

这被称为(在我的单元测试项目中):

var ctrl = new DirectoryController();
var httpDir = ctrl.GetDirectory();

谢谢你的帮助.

Answer 1

OlavNybø给我留下了导致答案的暗示.为了响应使用Request.CreateResponse的ASP.NET WebApi单元测试,jonnii建议使用以下代码:

        controller.Request = new HttpRequestMessage();
        controller.Request.Properties.Add(HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration());

这导致了一种测试控制器的好方法:

        var controller = new RecordsController();
        controller.Request = new HttpRequestMessage();
        controller.Request.Properties.Add(HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration());
        var json = controller.GetAllRecords(id);
        var records = JsonConvert.DeserializeObject<DynamicRecordSet>(json.Content.ReadAsStringAsync().Result);