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from django.core.exceptions import ImproperlyConfigured
from django.template import engines
from django.test import SimpleTestCase, override_settings
class TemplateUtilsTests(SimpleTestCase):
@override_settings(TEMPLATES=[{"BACKEND": "raise.import.error"}])
def test_backend_import_error(self):
"""
Failing to import a backend keeps raising the original import error
(#24265).
"""
with self.assertRaisesMessage(ImportError, "No module named 'raise"):
engines.all()
with self.assertRaisesMessage(ImportError, "No module named 'raise"):
engines.all()
@override_settings(
TEMPLATES=[
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
# Incorrect: APP_DIRS and loaders are mutually incompatible.
"APP_DIRS": True,
"OPTIONS": {"loaders": []},
}
]
)
def test_backend_improperly_configured(self):
"""
Failing to initialize a backend keeps raising the original exception
(#24265).
"""
msg = "app_dirs must not be set when loaders is defined."
with self.assertRaisesMessage(ImproperlyConfigured, msg):
engines.all()
with self.assertRaisesMessage(ImproperlyConfigured, msg):
engines.all()
@override_settings(
TEMPLATES=[
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
},
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
},
]
)
def test_backend_names_must_be_unique(self):
msg = (
"Template engine aliases aren't unique, duplicates: django. Set "
"a unique NAME for each engine in settings.TEMPLATES."
)
with self.assertRaisesMessage(ImproperlyConfigured, msg):
engines.all()
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