我正在对使用 VirtualParthUtility.GetAbsolute 的代码运行单元测试,但是在模拟上下文以使其正常工作时遇到问题。
我已经使用 Moq 设置了一个模拟上下文,如下所示
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;
}
并将其附加到 MVC Controller
_myController.ControllerContext = new ControllerContext(MakeMockHttpContext("~/").Object, new RouteData(), _slideSelectorController);
测试期间运行的代码符合以下要求:
venue.StyleSheetUrl = VirtualPathUtility.ToAbsolute(venue.StyleSheetUrl); // input like "~/styles/screen.css"
每次运行时,它都会进入 System.Web.VirtualPathUtility,问题是要返回的“VirtualParthString”总是抛出异常:
public static string ToAbsolute(string virtualPath)
{
return VirtualPath.CreateNonRelative(virtualPath).VirtualPathString;
}
异常的原因在 System.Web.VirtualPathString 中很容易看出:
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;
}
}
通过监 window 口,我可以看到 _virtualPath 和 HttpRuntime.AppDomainAppVirtualPathString 都是空的,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 方法创建了一个新的 VirtualPath 对象之后,它在返回之前并没有设置 _virtualPath 属性。到目前为止,从 Create 方法中提取的内容是:
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,如果有人可以建议如何让这个单元测试工作,那将非常有帮助!
谢谢,
史蒂夫
最佳答案
我只想创建一个包装器接口(interface)。就像是:
public interface IPathUtilities
{
string ToAbsolute(string virtualPath);
}
您可以将其注入(inject)您的 Controller 。在测试时,使用 stub 。在运行时,您将拥有一个实现
IPathUtilities
的类。并调用VirtualPathUtility.ToAbsolute()
.
关于unit-testing - 如何在使用 VirtualPathUtility.GetAbsolute 方法对代码进行单元测试时模拟上下文,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7538920/