public void TestMotorStartAndStop()
{
var car = new Car();
Assert.IsFalse(car.EngineIsRunning, "Engine could not be running.");
car.EngineStart();
Assert.IsTrue(car.EngineIsRunning, "Engine should be running.");
car.EngineStop();
Assert.IsFalse(car.EngineIsRunning, "Engine could not be running.");
}