How to mock application path when unit testing Web App

Question

I am testing code in a MVC HTML helper that throws an error when trying to get the application path:

//appropriate code that uses System.IO.Path to get direc         


        

Answer 1

var request = new Mock(MockBehavior.Strict);
        var moqRequestContext = new Mock(MockBehavior.Strict);
        request.SetupGet(r => r.RequestContext).Returns(moqRequestContext.Object);
        var routeData = new RouteData();
        routeData.Values.Add("key1", "value1");
        moqRequestContext.Setup(r => r.RouteData).Returns(routeData);

        request.SetupGet(x => x.ApplicationPath).Returns(PathProvider.GetAbsolutePath(""));

public interface IPathProvider
{
    string GetAbsolutePath(string path);
}

public class PathProvider : IPathProvider
{
     private readonly HttpServerUtilityBase _server;

     public PathProvider(HttpServerUtilityBase server)
     {
        _server = server;
     }

    public string GetAbsolutePath(string path)
    {
        return _server.MapPath(path);
    }
}