Modify base for MapPath

[ghost]

I'd like to suggest making the base path for Http.Context.Current.Server.MapPath configurable. Currently it is always set to AppDomain.CurrentDomain.BaseDirectory and cannot be changed.

Motivation:
The standard use case for FakeHttpContext is to create unit tests for web applications. The unit test project is usually separated from the web application project, so that they reside in different project directories. For successfully faking a web request, the MapPath would need to have the path that an actual web request to the web application directory would have not to the unit test Debug\bin directory.

[vadimzozulya]

Hi @hannobo, not sure that I completely understand why do you need this, as this util is for unit testing, where you don't need to create any requests, but I've implemented what you need.

Now you can set base path like this:

using (new FakeHttpContext { BasePath = "C:\myBasePath" })
{
}

NOTE: only absolute path can be use as a base path. It's a limitation which I can avoid (even with reflection).