blob: c9a223525a3e299e35f78eb1a955acdd14fedfa7 (
plain)
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
"""Tests for lookbehind width behavior across the ``re`` and ``regex`` engines."""
import re
import pytest
from edify import RegexBuilder
from edify.errors.backend import VariableWidthLookbehindNotSupportedError
def _variable_width_lookbehind_builder():
return RegexBuilder().assert_behind().between(1, 3).string("foo").end().string("bar")
def _fixed_width_lookbehind_builder():
return RegexBuilder().assert_behind().string("foo").end().string("bar")
def test_variable_width_lookbehind_under_re_raises_annotated_error():
with pytest.raises(VariableWidthLookbehindNotSupportedError) as excinfo:
_variable_width_lookbehind_builder().to_regex(engine="re")
text = str(excinfo.value)
assert "assert_behind" in text
assert "engine='regex'" in text
assert "= note:" in text
assert "help:" in text
def test_variable_width_lookbehind_under_regex_compiles_and_matches():
compiled = _variable_width_lookbehind_builder().to_regex(engine="regex")
assert compiled.engine == "regex"
assert compiled.search("foobar") is not None
assert compiled.search("foofoobar") is not None
assert compiled.search("foofoofoobar") is not None
assert compiled.search("bar") is None
def test_fixed_width_lookbehind_still_works_under_re():
compiled = _fixed_width_lookbehind_builder().to_regex(engine="re")
assert compiled.search("foobar") is not None
assert compiled.search("bar") is None
def test_variable_width_lookbehind_error_chains_the_underlying_pattern_error():
with pytest.raises(VariableWidthLookbehindNotSupportedError) as excinfo:
_variable_width_lookbehind_builder().to_regex(engine="re")
assert isinstance(excinfo.value.__cause__, re.error)
def test_re_engine_still_surfaces_other_pattern_errors_unchanged(monkeypatch: pytest.MonkeyPatch):
def raise_other_error(_pattern: str, flags: int = 0) -> re.Pattern[str]:
raise re.error("some other syntax error")
monkeypatch.setattr(re, "compile", raise_other_error)
with pytest.raises(re.error) as excinfo:
RegexBuilder().digit().to_regex(engine="re")
assert "some other syntax error" in str(excinfo.value)
|
