public void ToyPlaneUnwind()
        {
            //Arrange
            test = new ToyPlane();

            //Act
            test.WindUp();
            string beforeUnwind = test.getWindUpString();

            test.Unwind();
            string afterUnwind = test.getWindUpString();

            //Assert
            Assert.AreEqual(beforeUnwind, $"{test.ToString()} string is wound up.");
            Assert.AreEqual(afterUnwind, $"{test.ToString()} string is not wound up.");
        }
        public void ToyPlaneUnwindCheck()
        {
            //arrange
            ToyPlane tp = new ToyPlane();

            //act - Engine on
            tp.WindUp();
            tp.Engine.Start();
            tp.TakeOff();
            tp.Unwind();

            //assert - check if unwound
            Assert.IsFalse(tp.isWoundUp);

            //assert - make sure we aren't flying
            Assert.IsFalse(tp.IsFlying);

            //assert - are we grounded?
            Assert.AreEqual(tp.CurrentAltitude, 0);
        }