1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
from __future__ import annotations
import pytest
from pyupgrade._string_helpers import parse_format
from pyupgrade._string_helpers import unparse_parsed_string
@pytest.mark.parametrize(
's',
(
'', 'foo', '{}', '{0}', '{named}', '{!r}', '{:>5}', '{{', '}}',
'{0!s:15}',
),
)
def test_roundtrip_text(s):
assert unparse_parsed_string(parse_format(s)) == s
def test_parse_format_starts_with_named():
# technically not possible since our string always starts with quotes
assert parse_format(r'\N{snowman} hi {0} hello') == [
(r'\N{snowman} hi ', '0', '', None),
(' hello', None, None, None),
]
@pytest.mark.parametrize(
('s', 'expected'),
(
('{:}', '{}'),
('{0:}', '{0}'),
('{0!r:}', '{0!r}'),
),
)
def test_intentionally_not_round_trip(s, expected):
# Our unparse simplifies empty parts, whereas stdlib allows them
ret = unparse_parsed_string(parse_format(s))
assert ret == expected
|
