django/tests/urlpatterns_reverse/test_localeregexprovider.py

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import os
from unittest import mock
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from django.core.exceptions import ImproperlyConfigured
from django.test import SimpleTestCase, override_settings
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from django.urls import LocaleRegexProvider
from django.urls.resolvers import LocaleRegexDescriptor
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from django.utils import translation
here = os.path.dirname(os.path.abspath(__file__))
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@override_settings(LOCALE_PATHS=[os.path.join(here, 'translations', 'locale')])
class LocaleRegexProviderTests(SimpleTestCase):
def setUp(self):
translation.trans_real._translations = {}
def tearDown(self):
translation.trans_real._translations = {}
def test_translated_regex_compiled_per_language(self):
provider = LocaleRegexProvider(translation.gettext_lazy('^foo/$'))
with translation.override('de'):
de_compiled = provider.regex
# compiled only once per language
error = AssertionError('tried to compile url regex twice for the same language')
with mock.patch('django.urls.resolvers.re.compile', side_effect=error):
de_compiled_2 = provider.regex
with translation.override('fr'):
fr_compiled = provider.regex
self.assertEqual(fr_compiled.pattern, '^foo-fr/$')
self.assertEqual(de_compiled.pattern, '^foo-de/$')
self.assertEqual(de_compiled, de_compiled_2)
def test_nontranslated_regex_compiled_once(self):
provider = LocaleRegexProvider('^foo/$')
with translation.override('de'):
de_compiled = provider.regex
with translation.override('fr'):
# compiled only once, regardless of language
error = AssertionError('tried to compile non-translated url regex twice')
with mock.patch('django.urls.resolvers.re.compile', side_effect=error):
fr_compiled = provider.regex
self.assertEqual(de_compiled.pattern, '^foo/$')
self.assertEqual(fr_compiled.pattern, '^foo/$')
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def test_regex_compile_error(self):
"""Regex errors are re-raised as ImproperlyConfigured."""
provider = LocaleRegexProvider('*')
msg = '"*" is not a valid regular expression: nothing to repeat'
with self.assertRaisesMessage(ImproperlyConfigured, msg):
provider.regex
def test_access_locale_regex_descriptor(self):
self.assertIsInstance(LocaleRegexProvider.regex, LocaleRegexDescriptor)