def test_peek():
tokens = [["word", "test"],["int", 1]]
assert args.peek(tokens, "word"), "There should be a word."
assert len(tokens) == 2, "Args should not go down after peek."
args.match(tokens, "word")
assert args.peek(tokens, "int"), "There should be an int."
assert not args.peek(tokens, "option"), "There should not be an option."
args.match(tokens, "int")
def test_peek_fails():
tokens = []
args.peek(tokens, 'string')
