public void Test_ChildSequence()
{
SequenceNumber sequenceNumber = new SequenceNumber();
Assert.AreEqual("1", sequenceNumber.GetNext());
sequenceNumber.StartChildSequence();
Assert.AreEqual("1.1", sequenceNumber.GetNext());
Assert.AreEqual("1.2", sequenceNumber.GetNext());
sequenceNumber.EndChildSequence();
Assert.AreEqual("2", sequenceNumber.GetNext());
}