使用 Autofac 和 Moq 对 HttpResponseMessage 进行单元测试

Question

我在兜圈子。因此，当我在调试中运行时，我的 WebApi 将它需要的输出返回给浏览器。 Firefox 和 IE 显示我需要的列表。但是，当我尝试使用 Mock 和 Autofac 对响应进行单元测试时，HttpResponseMessage 我回来时没有内容。我觉得它正在返回不同的上下文或类似的东西。我不完全确定，因此提出这个问题。我通过谷歌搜索和 Autofac 文档将以下单元测试串在一起。

WebApiMethod（包含在InScrapController内，_WebScrapSprocService由Autofac在构造函数中注入）

public HttpResponseMessage GetFormItemsByFormNumber(int FormNumber)
{
    HttpResponseMessage response;
    try
    {
        //response = Request.CreateResponse(HttpStatusCode.OK, _WebScrapSprocService.GetFormItemsByFormNumber(FormNumber),new MediaTypeHeaderValue("application/json"));
        response = Request.CreateResponse(HttpStatusCode.OK, new MediaTypeHeaderValue("application/json"));
        response.Content = new StringContent(JsonConvert.SerializeObject(_WebScrapSprocService.GetFormItemsByFormNumber(FormNumber)),Encoding.UTF8, "application/json");
    } catch (Exception e)
    {
        response = Request.CreateResponse(HttpStatusCode.InternalServerError, new StringContent(e.Message), new MediaTypeHeaderValue("application/json"));
    }
    //Checking if bob knows anything about this...
    string bob = response.Content.ReadAsStringAsync().Result;
    return response;
}

单元测试

public void GetFormItemsByFormNumber()
{
    using (var mock = AutoMock.GetLoose())
    {

        var Service = mock.Mock<IWebScrapSprocService>().Setup(x => x.GetFormItemsByFormNumber(3392));
        var service = mock.Create<InScrapController>();
        service.Request = new HttpRequestMessage();
        service.Request.SetConfiguration(new HttpConfiguration());
        var HttpResponse = service.Request.CreateResponse(HttpStatusCode.OK, Service, new MediaTypeHeaderValue("application/json"));
        var response = service.GetFormItemsByFormNumber(3392);
        mock.Mock<IWebScrapSprocService>().Verify(x => x.GetFormItemsByFormNumber(3392));
        Assert.AreEqual(HttpResponse, response);
    }
}

Answer 1

这些反应不会相同。也应该重构被测方法。您也没有取回任何内容，因为您还没有设置服务以返回任何内容。

public IHttpActionResult GetFormItemsByFormNumber(int FormNumber) {
    IHttpActionResult response;
    try {
        var result = _WebScrapSprocService.GetFormItemsByFormNumber(FormNumber);
        response = Ok(result);
    } catch (Exception e) {
        response = InternalServerError(e);
    }
    return response;
}

接下来更新测试

public void GetFormItemsByFormNumber() {
    using (var mock = AutoMock.GetLoose()) {
        // Arrange.
        var formNumber = 3392;
        var items = new List<FormItemsByFormNumber> {
            new FormItemsByFormNumber { 
                //Populate as needed 
            },
            new FormItemsByFormNumber { 
                //Populate as needed 
            },
            //...etc
        };
        var serviceMock = mock.Mock<IWebScrapSprocService>();
        serviceMock.Setup(x => x.GetFormItemsByFormNumber(formNumber)) // Calling this...
            .Returns(items) // should return some value...
            .Verifiable();  // and I want to verify that it was called.
        var sut = mock.Create<InScrapController>();

        // Act.   
        var response = sut.GetFormItemsByFormNumber(formNumber) as OkNegotiatedContentResult<List<FormItemsByFormNumber>>();

        // Assert.
        serviceMock.Verify(); //verify setups were exercised as expected.
        Assert.IsNotNull(response);
    }
}