public void GibtErgebnisDerStartoperationZurueck()
{
var startoperationStub = new Mock<Operation>();
startoperationStub.Setup(operation => operation.FuehreAus(It.IsAny<Scorecard>()))
.Returns("Ausgabe");
var tracker = new Tracker(null, null, startoperationStub.Object);
Assert.That(tracker.Starte(), Is.EqualTo("Ausgabe"));
}