Async test

gistfile1.cs

public class Principal : IPrincipal
{
  public IIdentity Identity
  {
    get { return null; }
  }

  public bool IsInRole(string role)
  {
    throw new NotImplementedException();
  }
}

public class Startup
{
  public void Configuration(IAppBuilder app)
  {
    var random = new Random();

    int requestId = 0;

    app.Run(async ctx =>
    {
      var id = Interlocked.Increment(ref requestId);

      HttpContext.Current.User = new Principal();

      var user = HttpContext.Current.User;

      await Task.Delay(random.Next(100, 10000));

      Debug.Assert(object.ReferenceEquals(user, HttpContext.Current.User));
      Debug.WriteLine("Request {0} done waiting", id);

      await Task.FromResult<string>(null);
    });
  }
}