public void EngineInSeabirdToAircraft()
{
ISeacraft seabirdToAircraft = new SeabirdToAircraft();
((IAircraft)seabirdToAircraft).TakeOff();
Assert.AreEqual(100, ((IAircraft)seabirdToAircraft).Height);
Assert.AreEqual(50, seabirdToAircraft.Speed);
Assert.IsTrue(((IAircraft)seabirdToAircraft).Airborne);
}
public void IncreaseSeabirdToAircraftSpeed()
{
ISeacraft seabirdToAircraft = new SeabirdToAircraft();
seabirdToAircraft.IncreaseRevs();
seabirdToAircraft.IncreaseRevs();
Assert.AreEqual(0, ((IAircraft)seabirdToAircraft).Height);
Assert.AreEqual(20, seabirdToAircraft.Speed);
}