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|
from __future__ import annotations
import re
import sys
import pytest
from tokenize_rt import _re_partition
from tokenize_rt import curly_escape
from tokenize_rt import ESCAPED_NL
from tokenize_rt import main
from tokenize_rt import Offset
from tokenize_rt import parse_string_literal
from tokenize_rt import reversed_enumerate
from tokenize_rt import rfind_string_parts
from tokenize_rt import src_to_tokens
from tokenize_rt import Token
from tokenize_rt import tokens_to_src
from tokenize_rt import UNIMPORTANT_WS
def test_re_partition_no_match():
ret = _re_partition(re.compile('z'), 'abc')
assert ret == ('abc', '', '')
def test_re_partition_match():
ret = _re_partition(re.compile('b'), 'abc')
assert ret == ('a', 'b', 'c')
def test_offset_default_values():
assert Offset() == Offset(line=None, utf8_byte_offset=None)
def test_token_offset():
token = Token('NAME', 'x', line=1, utf8_byte_offset=2)
assert token.offset == Offset(line=1, utf8_byte_offset=2)
def test_token_matches():
token = Token('NAME', 'x', line=1, utf8_byte_offset=2)
assert token.matches(name='NAME', src='x')
assert not token.matches(name='OP', src='x')
assert not token.matches(name='NAME', src='y')
assert not token.matches(name='OP', src=':')
def test_src_to_tokens_simple():
src = 'x = 5\n'
ret = src_to_tokens(src)
assert ret == [
Token('NAME', 'x', line=1, utf8_byte_offset=0),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=1),
Token('OP', '=', line=1, utf8_byte_offset=2),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=3),
Token('NUMBER', '5', line=1, utf8_byte_offset=4),
Token('NEWLINE', '\n', line=1, utf8_byte_offset=5),
Token('ENDMARKER', '', line=2, utf8_byte_offset=0),
]
def test_src_to_tokens_escaped_nl():
src = (
'x = \\\n'
' 5\n'
)
ret = src_to_tokens(src)
assert ret == [
Token('NAME', 'x', line=1, utf8_byte_offset=0),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=1),
Token('OP', '=', line=1, utf8_byte_offset=2),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=3),
Token(ESCAPED_NL, '\\\n', line=1, utf8_byte_offset=4),
Token(UNIMPORTANT_WS, ' ', line=2, utf8_byte_offset=0),
Token('NUMBER', '5', line=2, utf8_byte_offset=4),
Token('NEWLINE', '\n', line=2, utf8_byte_offset=5),
Token('ENDMARKER', '', line=3, utf8_byte_offset=0),
]
def test_src_to_tokens_escaped_nl_no_left_ws():
src = (
'x =\\\n'
' 5\n'
)
ret = src_to_tokens(src)
assert ret == [
Token('NAME', 'x', line=1, utf8_byte_offset=0),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=1),
Token('OP', '=', line=1, utf8_byte_offset=2),
Token(ESCAPED_NL, '\\\n', line=1, utf8_byte_offset=3),
Token(UNIMPORTANT_WS, ' ', line=2, utf8_byte_offset=0),
Token('NUMBER', '5', line=2, utf8_byte_offset=4),
Token('NEWLINE', '\n', line=2, utf8_byte_offset=5),
Token('ENDMARKER', '', line=3, utf8_byte_offset=0),
]
def test_src_to_tokens_escaped_nl_windows():
src = (
'x = \\\r\n'
' 5\r\n'
)
ret = src_to_tokens(src)
assert ret == [
Token('NAME', 'x', line=1, utf8_byte_offset=0),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=1),
Token('OP', '=', line=1, utf8_byte_offset=2),
Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=3),
Token(ESCAPED_NL, '\\\r\n', line=1, utf8_byte_offset=4),
Token(UNIMPORTANT_WS, ' ', line=2, utf8_byte_offset=0),
Token('NUMBER', '5', line=2, utf8_byte_offset=4),
Token('NEWLINE', '\r\n', line=2, utf8_byte_offset=5),
Token('ENDMARKER', '', line=3, utf8_byte_offset=0),
]
def test_src_to_tokens_implicit_continue():
src = (
'x = (\n'
' 1,\n'
' 2,\n'
')\n'
)
ret = src_to_tokens(src)
assert ret == [
Token(name='NAME', src='x', line=1, utf8_byte_offset=0),
Token(name='UNIMPORTANT_WS', src=' ', line=1, utf8_byte_offset=1),
Token(name='OP', src='=', line=1, utf8_byte_offset=2),
Token(name='UNIMPORTANT_WS', src=' ', line=1, utf8_byte_offset=3),
Token(name='OP', src='(', line=1, utf8_byte_offset=4),
Token(name='NL', src='\n', line=1, utf8_byte_offset=5),
Token(name='UNIMPORTANT_WS', src=' ', line=2, utf8_byte_offset=0),
Token(name='NUMBER', src='1', line=2, utf8_byte_offset=4),
Token(name='OP', src=',', line=2, utf8_byte_offset=5),
Token(name='NL', src='\n', line=2, utf8_byte_offset=6),
Token(name='UNIMPORTANT_WS', src=' ', line=3, utf8_byte_offset=0),
Token(name='NUMBER', src='2', line=3, utf8_byte_offset=4),
Token(name='OP', src=',', line=3, utf8_byte_offset=5),
Token(name='NL', src='\n', line=3, utf8_byte_offset=6),
Token(name='OP', src=')', line=4, utf8_byte_offset=0),
Token(name='NEWLINE', src='\n', line=4, utf8_byte_offset=1),
Token(name='ENDMARKER', src='', line=5, utf8_byte_offset=0),
]
def test_src_to_tokens_no_eol_eof():
ret = src_to_tokens('1')
assert ret == [
Token('NUMBER', '1', line=1, utf8_byte_offset=0),
Token('NEWLINE', '', line=1, utf8_byte_offset=1),
Token('ENDMARKER', '', line=2, utf8_byte_offset=0),
]
def test_src_to_tokens_multiline_string():
src = (
'x = """\n'
' y\n'
'""".format(1)\n'
)
ret = src_to_tokens(src)
assert ret == [
Token(name='NAME', src='x', line=1, utf8_byte_offset=0),
Token(name='UNIMPORTANT_WS', src=' ', line=1, utf8_byte_offset=1),
Token(name='OP', src='=', line=1, utf8_byte_offset=2),
Token(name='UNIMPORTANT_WS', src=' ', line=1, utf8_byte_offset=3),
Token(name='STRING', src='"""\n y\n"""', line=1, utf8_byte_offset=4),
Token(name='OP', src='.', line=3, utf8_byte_offset=3),
Token(name='NAME', src='format', line=3, utf8_byte_offset=4),
Token(name='OP', src='(', line=3, utf8_byte_offset=10),
Token(name='NUMBER', src='1', line=3, utf8_byte_offset=11),
Token(name='OP', src=')', line=3, utf8_byte_offset=12),
Token(name='NEWLINE', src='\n', line=3, utf8_byte_offset=13),
Token(name='ENDMARKER', src='', line=4, utf8_byte_offset=0),
]
def test_src_to_tokens_fstring_with_escapes():
src = 'f" a {{ {b} }} c"'
ret = src_to_tokens(src)
if sys.version_info >= (3, 12): # pragma: >=3.12 cover
assert ret == [
Token(name='FSTRING_START', src='f"', line=1, utf8_byte_offset=0),
Token(name='FSTRING_MIDDLE', src=' a {{', line=1, utf8_byte_offset=2), # noqa: E501
Token(name='FSTRING_MIDDLE', src=' ', line=1, utf8_byte_offset=7),
Token(name='OP', src='{', line=1, utf8_byte_offset=8),
Token(name='NAME', src='b', line=1, utf8_byte_offset=9),
Token(name='OP', src='}', line=1, utf8_byte_offset=10),
Token(name='FSTRING_MIDDLE', src=' }}', line=1, utf8_byte_offset=11), # noqa: E501
Token(name='FSTRING_MIDDLE', src=' c', line=1, utf8_byte_offset=14), # noqa: E501
Token(name='FSTRING_END', src='"', line=1, utf8_byte_offset=16),
Token(name='NEWLINE', src='', line=1, utf8_byte_offset=17),
Token(name='ENDMARKER', src='', line=2, utf8_byte_offset=0),
]
else: # pragma: <3.12 cover
assert ret == [
Token(name='STRING', src='f" a {{ {b} }} c"', line=1, utf8_byte_offset=0), # noqa: E501
Token(name='NEWLINE', src='', line=1, utf8_byte_offset=17),
Token(name='ENDMARKER', src='', line=2, utf8_byte_offset=0),
]
@pytest.mark.skipif(sys.version_info < (3, 14), reason='3.14+')
def test_src_to_tokens_tstring_with_escapes(): # pragma: >=3.14 cover
src = 't" a {{ {b} }} c"'
ret = src_to_tokens(src)
assert ret == [
Token(name='TSTRING_START', src='t"', line=1, utf8_byte_offset=0),
Token(name='TSTRING_MIDDLE', src=' a {{', line=1, utf8_byte_offset=2), # noqa: E501
Token(name='TSTRING_MIDDLE', src=' ', line=1, utf8_byte_offset=7),
Token(name='OP', src='{', line=1, utf8_byte_offset=8),
Token(name='NAME', src='b', line=1, utf8_byte_offset=9),
Token(name='OP', src='}', line=1, utf8_byte_offset=10),
Token(name='TSTRING_MIDDLE', src=' }}', line=1, utf8_byte_offset=11), # noqa: E501
Token(name='TSTRING_MIDDLE', src=' c', line=1, utf8_byte_offset=14), # noqa: E501
Token(name='TSTRING_END', src='"', line=1, utf8_byte_offset=16),
Token(name='NEWLINE', src='', line=1, utf8_byte_offset=17),
Token(name='ENDMARKER', src='', line=2, utf8_byte_offset=0),
]
def test_src_to_tokens_fstring_with_named_escapes():
src = r'f" \N{SNOWMAN} "'
ret = src_to_tokens(src)
if sys.version_info >= (3, 12): # pragma: >=3.12 cover
assert ret == [
Token(name='FSTRING_START', src='f"', line=1, utf8_byte_offset=0),
Token(name='FSTRING_MIDDLE', src=' \\N{SNOWMAN}', line=1, utf8_byte_offset=2), # noqa: E501
Token(name='FSTRING_MIDDLE', src=' ', line=1, utf8_byte_offset=14),
Token(name='FSTRING_END', src='"', line=1, utf8_byte_offset=15),
Token(name='NEWLINE', src='', line=1, utf8_byte_offset=16),
Token(name='ENDMARKER', src='', line=2, utf8_byte_offset=0),
]
else: # pragma: <3.12 cover
assert ret == [
Token(name='STRING', src='f" \\N{SNOWMAN} "', line=1, utf8_byte_offset=0), # noqa: E501
Token(name='NEWLINE', src='', line=1, utf8_byte_offset=16),
Token(name='ENDMARKER', src='', line=2, utf8_byte_offset=0),
]
@pytest.mark.parametrize(
'filename',
(
'testing/resources/empty.py',
'testing/resources/unicode_snowman.py',
'testing/resources/backslash_continuation.py',
),
)
def test_roundtrip_tokenize(filename):
with open(filename) as f:
contents = f.read()
ret = tokens_to_src(src_to_tokens(contents))
assert ret == contents
def test_reversed_enumerate():
tokens = src_to_tokens('x = 5\n')
ret = reversed_enumerate(tokens)
assert next(ret) == (6, Token('ENDMARKER', '', line=2, utf8_byte_offset=0))
rest = list(ret)
assert rest == [
(5, Token(name='NEWLINE', src='\n', line=1, utf8_byte_offset=5)),
(4, Token('NUMBER', '5', line=1, utf8_byte_offset=4)),
(3, Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=3)),
(2, Token('OP', '=', line=1, utf8_byte_offset=2)),
(1, Token(UNIMPORTANT_WS, ' ', line=1, utf8_byte_offset=1)),
(0, Token('NAME', 'x', line=1, utf8_byte_offset=0)),
]
@pytest.mark.parametrize(
('s', 'expected'),
(
('""', ('', '""')),
('u"foo"', ('u', '"foo"')),
('F"hi"', ('F', '"hi"')),
('r"""x"""', ('r', '"""x"""')),
),
)
def test_parse_string_literal(s, expected):
assert parse_string_literal(s) == expected
@pytest.mark.parametrize('src', ('""', "b''", "r'''.'''"))
def test_rfind_string_parts_only_literal(src):
tokens = src_to_tokens(src)
assert rfind_string_parts(tokens, 0) == (0,)
def test_rfind_string_parts_py312_plus():
# in 3.12 this was changed to have its own tokenization (not as a string)
tokens = src_to_tokens("f''")
if sys.version_info >= (3, 12): # pragma: >=3.12 cover
assert rfind_string_parts(tokens, 0) == ()
else: # pragma: <3.12 cover
assert rfind_string_parts(tokens, 0) == (0,)
@pytest.mark.parametrize(
('src', 'n', 'expected'),
(
('"foo" "bar"', 2, (0, 2)),
('"""foo""" "bar"', 2, (0, 2)),
(
'(\n'
' "foo"\n'
' "bar"\n'
')',
8,
(3, 6),
),
(
'print(\n'
' "foo"\n'
' "bar"\n'
')',
7,
(4, 7),
),
),
)
def test_rfind_string_parts_multiple_tokens(src, n, expected):
tokens = src_to_tokens(src)
assert rfind_string_parts(tokens, n) == expected
def test_rfind_string_parts_not_a_string():
tokens = src_to_tokens('print')
assert rfind_string_parts(tokens, 0) == ()
@pytest.mark.parametrize(
('src', 'n'),
(
# v
('x(1, "foo")', 6),
# v
('x ("foo")', 4),
# v
('x[0]("foo")', 6),
# v
('x(0)("foo")', 6),
),
)
def test_rfind_string_parts_end_of_call_looks_like_string(src, n):
tokens = src_to_tokens(src)
assert rfind_string_parts(tokens, n) == ()
@pytest.mark.parametrize(
('src', 'n', 'expected_i'),
(
# v
('("foo")', 2, 1),
# v
('((("foo")))', 6, 3),
# v
('a + ("foo")', 6, 5),
# v
('a or ("foo")', 6, 5),
),
)
def test_rfind_string_parts_parenthesized(src, n, expected_i):
tokens = src_to_tokens(src)
assert rfind_string_parts(tokens, n) == (expected_i,)
def test_main(capsys, tmp_path):
f = tmp_path.joinpath('simple.py')
f.write_text('x = 5\n')
main((str(f),))
out, _ = capsys.readouterr()
assert out == (
"1:0 NAME 'x'\n"
"1:1 UNIMPORTANT_WS ' '\n"
"1:2 OP '='\n"
"1:3 UNIMPORTANT_WS ' '\n"
"1:4 NUMBER '5'\n"
"1:5 NEWLINE '\\n'\n"
"2:0 ENDMARKER ''\n"
)
@pytest.mark.parametrize(
('s', 'expected'),
(
('', ''),
('{foo}', '{{foo}}'),
(r'\N{SNOWMAN}', r'\N{SNOWMAN}'),
(r'\N{SNOWMAN} {bar}', r'\N{SNOWMAN} {{bar}}'),
),
)
def test_curly_escape(s, expected):
assert curly_escape(s) == expected
|
