public void ShowHelpTabMessageExpectHelpTabWithUriActive()
{
CreateFullExportsAndVm();
var msg = new ShowHelpTabMessage("testuri");
MainViewModel.Handle(msg);
var helpctx = MainViewModel.ActiveItem.WorkSurfaceViewModel as HelpViewModel;
Assert.IsNotNull(helpctx);
// ReSharper disable PossibleNullReferenceException
Assert.IsTrue(helpctx.Uri == "testuri");
// ReSharper restore PossibleNullReferenceException
}