blocks|key|689482|text|这将取决于您所使用的模拟或隔离框架。您可能希望这样做:+a)围绕可以模拟的静态属性创建包装器类型，或者b)使用可以模拟静态属性的框架-例如Moles或Typemock+Isolator|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|689483|entityMap|0|LINK|mutability|MUTABLE|url|http://research.microsoft.com/en-us/projects/moles/|1|http://www.typemock.com/^0|1X|5|0|23|H|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

It will depend on what mocking or isolation framework you are using. You might want to look into either a) creating a wrapper type around the static property that can be mocked, or b) using a framework which can mock static properties - e.g. <a href="http://research.microsoft.com/en-us/projects/moles/" rel="nofollow">Moles</a> or <a href="http://www.typemock.com/" rel="nofollow">Typemock Isolator</a>

blocks|key|473355|text|在ASP.NET+MVC应用程序中，你为什么要有一个依赖于HostingEnvironment.MapPath的代码，在这个应用程序中，你可以访问像HttpServerUtilityBase这样的对象，这些对象可以让你实现这一点，并且可以很容易地模拟和单元测试？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|473356|让我们举个例子:一个控制器操作，它使用了我们想要进行单元测试的抽象Server类：|473357|public+class+HomeController+:+Controller
{
++++public+ActionResult+Index()
++++{
++++++++var+file+=+Server.MapPath("~/App_Data/foo.txt");
++++++++return+View((object)file);
++++}
}|code-block|syntax|javascript|473358|现在，有很多方法可以对这个控制器操作进行单元测试。就我个人而言，我喜欢使用MVcContrib.TestHelper。|offset|length|473359|但让我们看看如何使用开箱即用的mocking框架来做到这一点。我在这个例子中使用Rhino+Mocks：|473360|[TestMethod]
public+void+Index_Action_Should_Calculate_And_Pass_The_Physical_Path_Of_Foo_As_View_Model()
{
++++//+arrange
++++var+sut+=+new+HomeController();
++++var+server+=+MockRepository.GeneratePartialMock<HttpServerUtilityBase>();
++++var+context+=+MockRepository.GeneratePartialMock<HttpContextBase>();
++++context.Expect(x+=>+x.Server).Return(server);
++++var+expected+=+@"c:\work\App_Data\foo.txt";
++++server.Expect(x+=>+x.MapPath("~/App_Data/foo.txt")).Return(expected);
++++var+requestContext+=+new+RequestContext(context,+new+RouteData());
++++sut.ControllerContext+=+new+ControllerContext(requestContext,+sut);

++++//+act
++++var+actual+=+sut.Index();

++++//+assert
++++var+viewResult+=+actual+as+ViewResult;
++++Assert.AreEqual(viewResult.Model,+expected);
}|473361|entityMap|0|LINK|mutability|MUTABLE|url|http://mvccontrib.codeplex.com/wikipage?title=TestHelper^0|0|0|0|11|L|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@$K|12|L|13|1|14]]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Why would you have a code that depends on HostingEnvironment.MapPath in an ASP.NET MVC application where you have access to objects like HttpServerUtilityBase which allow you to achieve this and which can be easily mocked and unit tested?

Let's take an example: a controller action which uses the abstract Server class that we want to unit test:

<pre><code>public class HomeController : Controller
{
 public ActionResult Index()
 {
 var file = Server.MapPath("~/App_Data/foo.txt");
 return View((object)file);
 }
}
</code></pre>

Now, there are many ways to unit test this controller action. Personally I like using the <a href="http://mvccontrib.codeplex.com/wikipage?title=TestHelper" rel="noreferrer">MVcContrib.TestHelper</a>. 

But let's see how we can do this using a mocking framework out-of-the-box. I use Rhino Mocks for this example:

<pre><code>[TestMethod]
public void Index_Action_Should_Calculate_And_Pass_The_Physical_Path_Of_Foo_As_View_Model()
{
 // arrange
 var sut = new HomeController();
 var server = MockRepository.GeneratePartialMock&lt;HttpServerUtilityBase&gt;();
 var context = MockRepository.GeneratePartialMock&lt;HttpContextBase&gt;();
 context.Expect(x =&gt; x.Server).Return(server);
 var expected = @"c:\work\App_Data\foo.txt";
 server.Expect(x =&gt; x.MapPath("~/App_Data/foo.txt")).Return(expected);
 var requestContext = new RequestContext(context, new RouteData());
 sut.ControllerContext = new ControllerContext(requestContext, sut);

 // act
 var actual = sut.Index();

 // assert
 var viewResult = actual as ViewResult;
 Assert.AreEqual(viewResult.Model, expected);
}
</code></pre>

blocks|key|689598|text|只需使用此代码..|type|unstyled|depth|inlineStyleRanges|entityRanges|data|689599|在根目录中创建一个新的文件夹名称引用，并将文件添加到此文件夹中。|689600|使用这个|689601|public+static+XElement+GetFile()
{
++++HttpContext.Current+=+new+HttpContext(new+HttpRequest("",+"http://www.google.com",+""),+new+HttpResponse(new+StringWriter()));

++++var+doc+=+new+XmlDocument();
++++var+file+=+HttpContext.Current.Server.MapPath("\\")+%2B+"abc.xml";
++++doc.Load(file);
++++var+e+=+XElement.Load(new+XmlNodeReader(doc));
++++return+e;
}|code-block|syntax|javascript|689602|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Just use this code..

Make a new folder name Reference in root directory and added your file inside this folder.

Use this

<pre><code>public static XElement GetFile()
{
 HttpContext.Current = new HttpContext(new HttpRequest("", "http://www.google.com", ""), new HttpResponse(new StringWriter()));

 var doc = new XmlDocument();
 var file = HttpContext.Current.Server.MapPath("\\") + "abc.xml";
 doc.Load(file);
 var e = XElement.Load(new XmlNodeReader(doc));
 return e;
}
</code></pre>

blocks|key|689634|text|我今天写了一个我不能控制的代码的测试，他们用了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|689635|++++private+static+String+GetApplicationPath()
++++{
++++++++return+HostingEnvironment.ApplicationVirtualPath.TrimEnd('/');
++++}|code-block|syntax|javascript|689636|下面是一个C#反射技巧，用于设置该值|689637|var+path+=++"/aaaa/bb";

HostingEnvironment+hostingEnvironment;
if+(HostingEnvironment.IsHosted.isFalse())
++++new+HostingEnvironment();

hostingEnvironment+=+(HostingEnvironment)typeof(HostingEnvironment).fieldValue("_theHostingEnvironment");

var+virtualPath+=+"System.Web".assembly()
+++++++++++++++++++.type("VirtualPath").ctor();

virtualPath.field("_virtualPath",+path);
//return+virtualPath.prop("VirtualPathString");++++++++++++++++
//return+virtualPath.prop("VirtualPathStringNoTrailingSlash");+++++++++++++++++

hostingEnvironment.field("_appVirtualPath",+virtualPath);
//hostingEnvironment.field("_appVirtualPath")+==+virtualPath;

return+HostingEnvironment.ApplicationVirtualPath+==+path;+++++++

//using++System.Web.Hosting|689638|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Well I was writing a test today for code that I don't control and they used

<pre><code> private static String GetApplicationPath()
 {
 return HostingEnvironment.ApplicationVirtualPath.TrimEnd('/');
 }
</code></pre>

so here is a C# reflection hack to set that value

<pre><code>var path = "/aaaa/bb";

HostingEnvironment hostingEnvironment;
if (HostingEnvironment.IsHosted.isFalse())
 new HostingEnvironment();

hostingEnvironment = (HostingEnvironment)typeof(HostingEnvironment).fieldValue("_theHostingEnvironment");

var virtualPath = "System.Web".assembly()
 .type("VirtualPath").ctor();

virtualPath.field("_virtualPath", path);
//return virtualPath.prop("VirtualPathString"); 
//return virtualPath.prop("VirtualPathStringNoTrailingSlash"); 

hostingEnvironment.field("_appVirtualPath", virtualPath);
//hostingEnvironment.field("_appVirtualPath") == virtualPath;

return HostingEnvironment.ApplicationVirtualPath == path; 

//using System.Web.Hosting
</code></pre>

I have some code that uses <code>HostingEnvironment.MapPath</code> which I would like to unit test. 

How can I setup <code>HostingEnvironment</code> so that it returns a path and not <code>null</code> in my unit test (mstest) project?

How to unit test code that uses HostingEnvironment.MapPath

单元测试

我有一些使用HostingEnvironment.MapPath的代码，我想对它们进行单元测试。如何在我的单元测试(mstest)项目中设置HostingEnvironment，使其返回路径而不是null？

问如何对使用HostingEnvironment.MapPath的代码进行单元测试
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