For our CASK application I am creating a User Import module; I have to import a list of names from an old .NET 1.1 Newsletter application (xml file) into CASK so my client can use it's Newsletter capabilities with existing users. A user import module (reusable) seemed to be the way to go.
Although a simple utility, I have made a commitment to do TDD from now on so a lot of infrastructure has to be put in place to support it; e.g., the simple process below has to be supported from Unit Test:
The HttpContextBase class takes on the responsibility of ensuring that there is an HttpContext.Current instance; it takes care of this responsibility in it's constructor:
Note: I moved the PhysicalPath line path below line 38 (so it is always set)
The HttpContext.Current.Server object is a different story - it won't allow me to instantiate a HttpServerUtility object; it is inaccessible. For this we'll rely on TypeMock; I chose it primarily because it supports SharePoint sealed classes and they have graciously offered us (the open source community) a free licence to use it with our projects.
Below I configure TypeMock so that when a request for Server.MapPath("App_data") is made that it will return the MockFolderPath; I'll be using this as a location to place the <user>.XML file uploaded via the ASP FileUpload control.
[TestClass]
public class FileUploadUtilFixture : TestBase
{
[TestMethod]
public void HttpContext_CanGetContextForUnitTest()
{
// The TestBase:HttpContextBase constructor will
// create a HttpContext.Current if it is null
HttpContext context = HttpContext.Current;
Assert.IsNotNull(context, "HttpContextBase should create HttpContext");
Assert.IsNotNull(PhysicalPath);
// Dynamically generate our MockFolderPath using the
// TestBase:HttpContextBase.PhysicalPath property (the
// baseclass used by FileUploadUtil).
MockFolderPath = PhysicalPath.Replace("default.aspx", "App_Data");
// Instantiate our file Utility class
FileUploadUtil fileUploadUtil = new FileUploadUtil();
// When MapPath("App_Data") is requested supply our
// MockFolderPath (public static string in TestBase)
using (RecordExpectations recorder = RecorderManager.StartRecording())
{
HttpContext.Current.Server.MapPath("App_Data");
recorder.Return(MockFolderPath);
}
// Use the fileUploadUtil to retrieve our data path
string app_dataPath = fileUploadUtil.GetFileFolder();
// Assert that all is well
Assert.AreEqual(app_dataPath, MockFolderPath);
Assert.AreEqual(MockFolderPath, fileUploadUtil.FileFolder);
MockManager.Verify();
}
Full source code available HERE Change Set: 40436
Tags:
typemock,
unit test,
caskdotnet
Categories: