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ASP.NET MVC5 Web API 2，OWIN和Autofac的集成测试出错 . 假HttpContext

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我有ASP.NET MVC5和WebApi2应用程序与一些MVC和ApiControllers . 使用OWIN和Autofac . 我编写了集成测试，它调用了一些web api方法并测试了一个响应：

[TestMethod]
public async Task GetUsersForTreeTest()
{
  using (var server = TestServer.Create<Startup>())
  using (var client = new HttpClient(server.Handler))
  {
    client.BaseAddress = new Uri("http://localhost/api/");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    var resp = await client.GetAsync("User/GetUsersForTree");
    resp.EnsureSuccessStatusCode();
    var users = await resp.Content.ReadAsAsync<List<UserForTreeDto>>();
    Assert.IsTrue(users.Any());
  }
}

Startup是我的OWIN启动类 . 我使用Autofac初始化MVC和WebApi的依赖项解析器 .

当我运行测试时，我得到一个例外：

System.ArgumentNullException：值不能为null . 参数名称：httpContext结果StackTrace：位于Owin.AutofacMvcAppBuilderExtensions的System.Web.HttpContextWrapper..ctor（HttpContext httpContext） . <> c . < . cctor> b__2_0（）at Owin.AutofacMvcAppBuilderExtensions . <> c . <b__1_0> d . 的MoveNext（）

但是当我发表评论时

app.UseAutofacMvc();

测试通过了 . 据我了解，错误发生在AutofacMvcAppBuilderExtensions类的this line中 .

看起来像HttpContext.Current是null .

如何初始化HttpContext？

asp.net-mvc-5 asp.net-web-api2 integration-testing owin autofac

1 回答

  • 0

    以下代码适用于我：

    private static HttpContext GetFakeHttpContext()
{
  var httpRequest = new HttpRequest("", "http://fakeUrl/", "");
  var stringWriter = new StringWriter();
  var httpResponce = new HttpResponse(stringWriter);
  var httpContext = new HttpContext(httpRequest, httpResponce);
  return httpContext;
}

[TestMethod]
public async Task GetUsersForTreeTest()
{
  var server = TestServer.Create(app =>
  {
    app.Use(async (context, next) =>
    {
      HttpContext.Current = GetFakeHttpContext();
      await next();
    });
    new Startup().Configuration(app);
  });
  using (server)
  using (var client = new HttpClient(server.Handler))
  {
    client.BaseAddress = new Uri("http://localhost/api/");

    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    var resp = await client.GetAsync("User/GetUsersForTree");
    resp.EnsureSuccessStatusCode();
    var users = await resp.Content.ReadAsAsync<List<UserForTreeDto>>();
    Assert.IsTrue(users.Any());
  }
}
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