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import re
import unittest
from django.test import SimpleTestCase
from django.utils import regex_helper
class NormalizeTests(unittest.TestCase):
def test_empty(self):
pattern = r""
expected = [("", [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_escape(self):
pattern = r"\\\^\$\.\|\?\*\+\(\)\["
expected = [("\\^$.|?*+()[", [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_positional(self):
pattern = r"(.*)-(.+)"
expected = [("%(_0)s-%(_1)s", ["_0", "_1"])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_noncapturing(self):
pattern = r"(?:non-capturing)"
expected = [("non-capturing", [])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_named(self):
pattern = r"(?P<first_group_name>.*)-(?P<second_group_name>.*)"
expected = [
(
"%(first_group_name)s-%(second_group_name)s",
["first_group_name", "second_group_name"],
)
]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
def test_group_backreference(self):
pattern = r"(?P<first_group_name>.*)-(?P=first_group_name)"
expected = [("%(first_group_name)s-%(first_group_name)s", ["first_group_name"])]
result = regex_helper.normalize(pattern)
self.assertEqual(result, expected)
class LazyReCompileTests(SimpleTestCase):
def test_flags_with_pre_compiled_regex(self):
test_pattern = re.compile("test")
lazy_test_pattern = regex_helper._lazy_re_compile(test_pattern, re.I)
msg = "flags must be empty if regex is passed pre-compiled"
with self.assertRaisesMessage(AssertionError, msg):
lazy_test_pattern.match("TEST")
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