public void Initialize() { _project = new VsProjectDouble(); _project.AddFile("jscrunch.config", null); _eventQueue = new EventQueue(); var fileSystem = Substitute.For <IFileSystem>(); fileSystem .GetContentsOf(Arg.Any <string>()) .Returns("<?xml version=\"1.0\"?><jscrunch><tests root=\"Tests\" pattern=\".*\\.Tests\\.ts\" /></jscrunch>"); _listener = new DiscoverTestsListener(_eventQueue, fileSystem); }