# IT:AD:MSTest:HowTo:Map Paths to Content Files #



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<panel title="Summary">

Some tests involve finding files in the BaseDirectory.

[[IT/AD/NUnit/]] can do it just fine. MSTest can't.


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## Process ##


If you are relying on AppDomain.CurrentDomain.BaseDirectory to get the root directory, your test will break. 


There are two fixes.

### The Hack ###

The fix is explained at http://www.ademiller.com/blogs/tech/2008/01/gotchas-mstest-appdomain-changes-in-vs-2008/. 

Basically, you need to set your BaseDirectory in your MSTest TestClass constructor like this:

<sxh csharp>
string currDir = Environment.CurrentDirectory.Substring(0, Environment.CurrentDirectory.IndexOf("TestResults"));
AppDomain.CurrentDomain.SetData("APPBASE", currDir);
</sxh>


### The Official mechanism 

* http://www.sidesofmarch.com/index.php/archive/2008/12/29/mstest-deploymentitem-and-the-frustrating-relativepathroot-setting/

which is:

<sxh csharp>
     /// <summary>
        ///   An Example Test.
        /// </summary>
        [TestMethod]
        [DeploymentItem(@"Templates\NV\Parts\SubHeader.nv",@"Templates\NV\Parts")]
        [DeploymentItem(@"Templates\NV\body.nv", @"Templates\NV")]
        [DeploymentItem(@"Templates\NV\Header.nv", @"Templates\NV")]
        public void UnitTest_TransformDIrectlyUsingVendorService()
        {

            string path = environmentService.MapPath(@"Templates\NV\body.nv");

            Assert.IsTrue(System.IO.File.Exists(path));
        }

</sxh>

##References ##
* http://www.stormbase.net/converting-from-nunit-to-mstest
* http://www.ademiller.com/blogs/tech/2008/01/gotchas-mstest-appdomain-changes-in-vs-2008/
* http://www.sidesofmarch.com/index.php/archive/2008/12/29/mstest-deploymentitem-and-the-frustrating-relativepathroot-setting/