public void CorrectlyDeleteVehicle()
{
Vehicle vehicle = Vehicles.Create("98ASD871NFLS91", 1);
var beforeAdd = vvm.VehiclesCollection.IndexOf(vehicle);
Assert.AreEqual(-1, beforeAdd);
Assert.AreEqual(Vehicles.Get(vehicle.Id).Id, vehicle.Id);
vvm.VehiclesCollection.Add(vehicle);
var beforeDelete = vvm.VehiclesCollection.IndexOf(vehicle);
Assert.AreNotEqual(-1, beforeDelete);
vvm.SelectedVehicle = vehicle;
vvm.DeleteVehicle();
var afterDelete = vvm.VehiclesCollection.IndexOf(vehicle);
Assert.AreEqual(-1, afterDelete);
}