def assert_continuity_of_token_spans(program_text):
current_position = 0
program_text_length = len(program_text)
for token in generate_tokens(program_text):
if token.start <= program_text_length:
assert token.start == current_position
current_position = token.stop
else:
assert token.type == name_tok["ENDMARKER"]
def test_add():
toks = list(generate_tokens("a + b"))
assert toks == [
Token(0, 1, "NAME", "a"),
Token(1, 2, "WHITESPACE", " "),
Token(2, 3, "OP", "+"),
Token(3, 4, "WHITESPACE", " "),
Token(4, 5, "NAME", "b"),
Token(6, 6, "ENDMARKER", ""),
]
def assert_invariant(program_text):
tokens = generate_tokens(program_text)
f = StringIO()
untokenize(tokens, f)
f.seek(0)
assert f.read() == program_text
