我有一个web服务，我试图单元测试。在服务中，它从HttpContext中提取了几个值，如下所示:
m_password = (string)HttpContext.Current.Session["CustomerId"];
m_userID = (string)HttpContext.Current.Session["CustomerUrl"];
在单元测试中，我使用一个简单的工作请求创建上下文，如下所示:
SimpleWorkerRequest request = new SimpleWorkerRequest("", "", "", null, new StringWriter());
HttpContext context = new HttpContext(request);
HttpContext.Current = context;
然而，每当我试图设置HttpContext.Current.Session的值时
HttpContext.Current.Session["CustomerId"] = "customer1";
HttpContext.Current.Session["CustomerUrl"] = "customer1Url";
我得到空引用异常，说HttpContext.Current.Session是空的。
是否有方法在单元测试中初始化当前会话?
Milox解决方案比IMHO接受的解决方案更好，但我在处理url时遇到了一些问题。
我做了一些改变，使它能正常工作与任何url和避免反射。
public static HttpContext FakeHttpContext(string url)
{
var uri = new Uri(url);
var httpRequest = new HttpRequest(string.Empty, uri.ToString(),
uri.Query.TrimStart('?'));
var stringWriter = new StringWriter();
var httpResponse = new HttpResponse(stringWriter);
var httpContext = new HttpContext(httpRequest, httpResponse);
var sessionContainer = new HttpSessionStateContainer("id",
new SessionStateItemCollection(),
new HttpStaticObjectsCollection(),
10, true, HttpCookieMode.AutoDetect,
SessionStateMode.InProc, false);
SessionStateUtility.AddHttpSessionStateToContext(
httpContext, sessionContainer);
return httpContext;
}
从不嘲弄。从来没有!解决方法非常简单。为什么要伪造HttpContext这样一个美丽的作品呢?
下推会话!(这句话对我们大多数人来说已经足够理解了，但下面会详细解释)
(字符串)HttpContext.Current.Session(“CustomerId”);是我们现在访问它的方式。将其更改为
_customObject.SessionProperty("CustomerId")
当从test调用时，_customObject使用替代存储(DB或云键值[http://www.kvstore.io/])
但是当从实际应用程序调用时，_customObject使用Session。
这是怎么做到的?嗯…依赖注入!
因此test可以设置会话(地下)，然后调用应用程序方法，就好像它对会话一无所知一样。然后测试秘密地检查应用程序代码是否正确地更新了会话。或者应用程序是否基于测试设置的会话值进行操作。
事实上，我们最终还是嘲笑了，尽管我说过:“永远不要嘲笑”。因为我们忍不住溜到下一个规则，“嘲笑最不疼的地方!”模拟巨大的HttpContext或模拟一个小的会话，哪个伤害最小?别问我这些规矩是从哪来的。我们就说常识吧。这里有一篇关于不要嘲笑单元测试会杀死我们的有趣文章
试试这个方法。
public static HttpContext getCurrentSession()
{
HttpContext.Current = new HttpContext(new HttpRequest("", ConfigurationManager.AppSettings["UnitTestSessionURL"], ""), new HttpResponse(new System.IO.StringWriter()));
System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext(
HttpContext.Current, new HttpSessionStateContainer("", new SessionStateItemCollection(), new HttpStaticObjectsCollection(), 20000, true,
HttpCookieMode.UseCookies, SessionStateMode.InProc, false));
return HttpContext.Current;
}
你可以通过创建一个新的HttpContext来“伪造”它，就像这样:
http://www.necronet.org/archive/2010/07/28/unit-testing-code-that-uses-httpcontext-current-session.aspx
我把这段代码放到一个静态helper类中，如下所示:
public static HttpContext FakeHttpContext()
{
var httpRequest = new HttpRequest("", "http://example.com/", "");
var stringWriter = new StringWriter();
var httpResponse = new HttpResponse(stringWriter);
var httpContext = new HttpContext(httpRequest, httpResponse);
var sessionContainer = new HttpSessionStateContainer("id", new SessionStateItemCollection(),
new HttpStaticObjectsCollection(), 10, true,
HttpCookieMode.AutoDetect,
SessionStateMode.InProc, false);
httpContext.Items["AspSession"] = typeof(HttpSessionState).GetConstructor(
BindingFlags.NonPublic | BindingFlags.Instance,
null, CallingConventions.Standard,
new[] { typeof(HttpSessionStateContainer) },
null)
.Invoke(new object[] { sessionContainer });
return httpContext;
}
或者不是使用反射来构造新的httpessionstate实例，你可以将你的httpessionstatecontainer附加到HttpContext(根据Brent M. Spell的评论):
SessionStateUtility.AddHttpSessionStateToContext(httpContext, sessionContainer);
然后你可以像这样在单元测试中调用它:
HttpContext.Current = MockHelper.FakeHttpContext();
在asp.net Core / MVC 6 rc2中，你可以设置HttpContext
var SomeController controller = new SomeController();
controller.ControllerContext = new ControllerContext();
controller.ControllerContext.HttpContext = new DefaultHttpContext();
controller.HttpContext.Session = new DummySession();
Rc 1为
var SomeController controller = new SomeController();
controller.ActionContext = new ActionContext();
controller.ActionContext.HttpContext = new DefaultHttpContext();
controller.HttpContext.Session = new DummySession();
https://stackoverflow.com/a/34022964/516748
考虑使用Moq
new Mock<ISession>();
