public void SerialNumberCloneTest()
{
var cloneDispenser = _dispenser.Clone();
var setableDisk = cloneDispenser.SymbolDisks.OfType <SetableNumberDisk>().Last();
setableDisk.Skip = 1;
var expectedSerialNumber = cloneDispenser.First();
Assert.AreEqual(expectedSerialNumber, "Test-甲-A1");
Assert.AreNotEqual(cloneDispenser.Skip(2).First(), _dispenser.Skip(2).First());
}