public void CarCannotGearGoReverseFromReverseGear()
{
var car = new Car();
car.SetState(new ReverseGearState());
Assert.That(car.CanReverse(), Is.False);
}
public void CarCanGearDownFromNeutralState()
{
var car = new Car();
Assert.That(car.CanReverse(), Is.True);
}