django/tests/backends/test_utils.py

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from django.core.exceptions import ImproperlyConfigured
from django.db.utils import load_backend
from django.test import SimpleTestCase
from django.test.utils import str_prefix
from django.utils import six
class TestLoadBackend(SimpleTestCase):
def test_load_backend_invalid_name(self):
msg = str_prefix(
"'foo' isn't an available database backend.\n"
"Try using 'django.db.backends.XXX', where XXX is one of:\n"
" %(_)s'mysql', %(_)s'oracle', %(_)s'postgresql_psycopg2', %(_)s'sqlite3'\n"
"Error was: No module named %%s"
) % "foo.base" if six.PY2 else "'foo'"
with self.assertRaisesMessage(ImproperlyConfigured, msg):
load_backend('foo')