public void TestKeyAndValue()
{
List <KeyValuePair <StackItem, StackItem> > list = new List <KeyValuePair <StackItem, StackItem> >();
StackItem stackItem1 = new Integer(0);
StackItem stackItem2 = new Integer(1);
list.Add(new KeyValuePair <StackItem, StackItem>(stackItem1, stackItem2));
MapWrapper mapWrapper = new MapWrapper(list);
mapWrapper.Next();
Assert.AreEqual(stackItem1, mapWrapper.Key());
Assert.AreEqual(stackItem2, mapWrapper.Value());
}