public void BatteryShouldReturn70WhenChargedWith20()
 {
     var battery = new LaptopBattery();
     battery.Charge(20);
     int result = battery.Percentage;
     Assert.AreEqual(70, result);
 }
 public void BatteryShouldReturn100WhenOverCharged()
 {
     var battery = new LaptopBattery();
     battery.Charge(1000);
     int result = battery.Percentage;
     Assert.AreEqual(100, result);
 }