import unittest
from unittest import mock
from django.core.checks.database import check_database_backends
from django.db import connection, connections
from django.test import TestCase
class DatabaseCheckTests(TestCase):
databases = {"default", "other"}
@mock.patch("django.db.backends.base.validation.BaseDatabaseValidation.check")
def test_database_checks_called(self, mocked_check):
check_database_backends()
self.assertFalse(mocked_check.called)
check_database_backends(databases=self.databases)
self.assertTrue(mocked_check.called)
@unittest.skipUnless(connection.vendor == "mysql", "Test only for MySQL")
def test_mysql_strict_mode(self):
def _clean_sql_mode():
for alias in self.databases:
if hasattr(connections[alias], "sql_mode"):
del connections[alias].sql_mode
_clean_sql_mode()
good_sql_modes = ["STRICT_TRANS_TABLES,STRICT_ALL_TABLES",
"STRICT_TRANS_TABLES",
"STRICT_ALL_TABLES",
]for sql_mode in good_sql_modes:
with mock.patch.object(
connection,"mysql_server_data",
{"sql_mode": sql_mode},
):self.assertEqual(check_database_backends(databases=self.databases), [])
_clean_sql_mode()
bad_sql_modes = ["", "WHATEVER"]
for sql_mode in bad_sql_modes:
mocker_default = mock.patch.object(
connection,"mysql_server_data",
{"sql_mode": sql_mode},
)mocker_other = mock.patch.object(
connections["other"],
"mysql_server_data",
{"sql_mode": sql_mode},
)with mocker_default, mocker_other:
# One warning for each database alias
result = check_database_backends(databases=self.databases)
self.assertEqual(len(result), 2)
self.assertEqual([r.id for r in result], ["mysql.W002", "mysql.W002"])
_clean_sql_mode()