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]