def test_peek(self):
if _debug: TestTagList._debug("test_peek")
tag0 = IntegerTag(0)
taglist = TagList([tag0])
# peek at the first tag
assert tag0 == taglist.Peek()
# pop of the front
tag1 = taglist.Pop()
assert taglist.tagList == []
# push it back on the front
taglist.push(tag1)
assert taglist.tagList == [tag1]
