如何在使用VirtualPathUtility.GetAbsolute方法单元测试代码时模拟上下文
我正在对使用VirtualParthUtility.GetAbsolute的代码运行单元测试,但有问题模拟上下文以使其工作。如何在使用VirtualPathUtility.GetAbsolute方法单元测试代码时模拟上下文
我已经建立了一个模拟情境与起订量如下
private Mock<HttpContextBase> MakeMockHttpContext(string url) // url = "~/"
{
var mockHttpContext = new Mock<HttpContextBase>();
// Mock the request
var mockRequest = new Mock<HttpRequestBase>();
mockRequest.Setup(x => x.ApplicationPath).Returns("/");
mockRequest.Setup(x => x.Path).Returns("/");
mockRequest.Setup(x => x.PathInfo).Returns(string.Empty);
mockRequest.Setup(x => x.AppRelativeCurrentExecutionFilePath).Returns(url);
mockHttpContext.Setup(x => x.Request).Returns(mockRequest.Object);
// Mock the response
var mockResponse = new Mock<HttpResponseBase>();
mockResponse.Setup(x => x.ApplyAppPathModifier(It.IsAny<string>())).Returns((string s) => s);
mockHttpContext.Setup(x => x.Response).Returns(mockResponse.Object);
return mockHttpContext;
}
和连接这一个MVC控制器
_myController.ControllerContext = new ControllerContext(MakeMockHttpContext("~/").Object, new RouteData(), _slideSelectorController);
在测试过程中运行的代码打行:
venue.StyleSheetUrl = VirtualPathUtility.ToAbsolute(venue.StyleSheetUrl); // input like "~/styles/screen.css"
每次运行时,它都进入System.Web.VirtualPathUtility,问题是“VirtualP arthString”总是被退回抛出一个异常:
public static string ToAbsolute(string virtualPath)
{
return VirtualPath.CreateNonRelative(virtualPath).VirtualPathString;
}
的原因异常容易在System.Web.VirtualPathString看到:
public string VirtualPathString
{
get
{
if (this._virtualPath == null)
{
if (HttpRuntime.AppDomainAppVirtualPathObject == null)
{
throw new HttpException(System.Web.SR.GetString("VirtualPath_CantMakeAppAbsolute", new object[] { this._appRelativeVirtualPath }));
}
if (this._appRelativeVirtualPath.Length == 1)
{
this._virtualPath = HttpRuntime.AppDomainAppVirtualPath;
}
else
{
this._virtualPath = HttpRuntime.AppDomainAppVirtualPathString + this._appRelativeVirtualPath.Substring(2);
}
}
return this._virtualPath;
}
}
通过观察窗,我可以看到_virtualPath和HttpRuntime.AppDomainAppVirtualPathString都是null,因此它会引发异常。
如果设置了_virtualPath,则不会发生异常。但是,在VirtualPath.Create方法创建新的VirtualPath对象之后,它在返回之前不会设置_virtualPath属性。从创建方法的提取物到这一点是:
VirtualPath path = new VirtualPath();
if (UrlPath.IsAppRelativePath(virtualPath))
{
virtualPath = UrlPath.ReduceVirtualPath(virtualPath);
if (virtualPath[0] == '~')
{
if ((options & VirtualPathOptions.AllowAppRelativePath) == 0)
{
throw new ArgumentException(System.Web.SR.GetString("VirtualPath_AllowAppRelativePath", new object[] { virtualPath }));
}
path._appRelativeVirtualPath = virtualPath;
return path;
因此,如果任何人都可以建议如何得到这个单元测试工作,那将是非常有帮助!
感谢,
史蒂夫
我只想创造一个包装接口。例如:
public interface IPathUtilities
{
string ToAbsolute(string virtualPath);
}
您可以将其注入控制器。在测试时间,使用存根。在运行时,您将拥有一个实现IPathUtilities
的类并调用VirtualPathUtility.ToAbsolute()
。
感谢您的建议。漂亮优雅的解决 – Appetere
如果你喜欢这个答案,请将其标记为可接受的解决方案。谢谢! – PatrickSteele
阅读,也许我需要使用隔离框架来嘲笑静态方法HttpRuntime.AppDomainAppVirtualPath? – Appetere