public void AddGpsFeature_Tests()
{
var purchasedFeatures =
motorHomeRentalAvailableFeatures
.AddFeature <GpsFeature>()
.GetPurchasedFeatures();
Assert.AreEqual(1, purchasedFeatures.Count);
Assert.AreEqual(35, motorHomeRentalAvailableFeatures.EstimatePurchasedFeaturesFee());
var feature = purchasedFeatures.First();
Assert.IsInstanceOf <GpsFeature>(feature);
}
public IRental EstimatePurchasedFeaturesFee()
{
CalculatedPurchasedFeaturesFee = AvailableFeatures.EstimatePurchasedFeaturesFee();
return(this);
}