在单元测试中设置HttpContext.Current.Session
在单元测试中设置HttpContext.Current.Session
提问于 2012-03-09 04:15:31
我有一个正在尝试进行单元测试的web服务。在服务中，它从HttpContext中提取几个值，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worker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;但是，每当我尝试设置HttpContext.Current.Session的值时，
HttpContext.Current.Session["CustomerId"] = "customer1";
HttpContext.Current.Session["CustomerUrl"] = "customer1Url";我得到了空引用异常，表明HttpContext.Current.Session为空。
有没有办法在单元测试中初始化当前会话？
回答 12
Stack Overflow用户
回答已采纳
发布于 2012-03-09 04:28:31
我们必须通过使用HttpContextManager并在应用程序和单元测试中调用工厂来模拟HttpContext
public class HttpContextManager
{
private static HttpContextBase m_context;
public static HttpContextBase Current
{
get
{
if (m_context != null)
return m_context;
if (HttpContext.Current == null)
throw new InvalidOperationException("HttpContext not available");
return new HttpContextWrapper(HttpContext.Current);
}
}
public static void SetCurrentContext(HttpContextBase context)
{
m_context = context;
}
}然后，您可以将对HttpContext.Current的任何调用替换为HttpContextManager.Current，并可以访问相同的方法。然后，在进行测试时，您还可以访问HttpContextManager并模拟您的期望
这是一个使用Moq的示例
private HttpContextBase GetMockedHttpContext()
{
var context = new Mock<HttpContextBase>();
var request = new Mock<HttpRequestBase>();
var response = new Mock<HttpResponseBase>();
var session = new Mock<HttpSessionStateBase>();
var server = new Mock<HttpServerUtilityBase>();
var user = new Mock<IPrincipal>();
var identity = new Mock<IIdentity>();
var urlHelper = new Mock<UrlHelper>();
var routes = new RouteCollection();
MvcApplication.RegisterRoutes(routes);
var requestContext = new Mock<RequestContext>();
requestContext.Setup(x => x.HttpContext).Returns(context.Object);
context.Setup(ctx => ctx.Request).Returns(request.Object);
context.Setup(ctx => ctx.Response).Returns(response.Object);
context.Setup(ctx => ctx.Session).Returns(session.Object);
context.Setup(ctx => ctx.Server).Returns(server.Object);
context.Setup(ctx => ctx.User).Returns(user.Object);
user.Setup(ctx => ctx.Identity).Returns(identity.Object);
identity.Setup(id => id.IsAuthenticated).Returns(true);
identity.Setup(id => id.Name).Returns("test");
request.Setup(req => req.Url).Returns(new Uri("http://www.google.com"));
request.Setup(req => req.RequestContext).Returns(requestContext.Object);
requestContext.Setup(x => x.RouteData).Returns(new RouteData());
request.SetupGet(req => req.Headers).Returns(new NameValueCollection());
return context.Object;
}然后，为了在单元测试中使用它，我在我的Test Init方法中调用了它
HttpContextManager.SetCurrentContext(GetMockedHttpContext());然后，您可以在上面的方法中添加您期望对您的web服务可用的会话的预期结果。
Stack Overflow用户
发布于 2012-04-12 23:24:37
您可以通过创建一个新HttpContext来“伪造它”，如下所示：
我将该代码放在一个静态助手类中，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，不使用反射来构造新的HttpSessionState实例，您可以直接将HttpSessionStateContainer附加到HttpContext (根据Brent M.Spell的评论)：
SessionStateUtility.AddHttpSessionStateToContext(httpContext, sessionContainer);然后你可以在你的单元测试中调用它，就像这样：
HttpContext.Current = MockHelper.FakeHttpContext();Stack Overflow用户
发布于 2013-10-31 22:29:17
除I had some problems with this implementation when handling urls with querystring外，Milox solution优于公认的IMHO。
我做了一些修改，以使它能与任何urls正常工作，并避免反射。
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;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9624242
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