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from django.core.exceptions import ImproperlyConfigured
from django.db.backends.utils import split_identifier, truncate_name
from django.db.utils import load_backend
from django.test import SimpleTestCase
from django.utils import six
class TestLoadBackend(SimpleTestCase):
def test_load_backend_invalid_name(self):
msg = (
"'foo' isn't an available database backend.\n"
"Try using 'django.db.backends.XXX', where XXX is one of:\n"
" 'mysql', 'oracle', 'postgresql', 'sqlite3'\n"
"Error was: No module named %s"
) % "foo.base" if six.PY2 else "'foo'"
with self.assertRaisesMessage(ImproperlyConfigured, msg):
load_backend('foo')
def test_truncate_name(self):
self.assertEqual(truncate_name('some_table', 10), 'some_table')
self.assertEqual(truncate_name('some_long_table', 10), 'some_la38a')
self.assertEqual(truncate_name('some_long_table', 10, 3), 'some_loa38')
self.assertEqual(truncate_name('some_long_table'), 'some_long_table')
# "user"."table" syntax
self.assertEqual(truncate_name('username"."some_table', 10), 'username"."some_table')
self.assertEqual(truncate_name('username"."some_long_table', 10), 'username"."some_la38a')
self.assertEqual(truncate_name('username"."some_long_table', 10, 3), 'username"."some_loa38')
def test_split_identifier(self):
self.assertEqual(split_identifier('some_table'), ('', 'some_table'))
self.assertEqual(split_identifier('"some_table"'), ('', 'some_table'))
self.assertEqual(split_identifier('namespace"."some_table'), ('namespace', 'some_table'))
self.assertEqual(split_identifier('"namespace"."some_table"'), ('namespace', 'some_table'))
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