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import unittest
from unittest import mock
from django.core.checks import Tags, run_checks
from django.core.checks.registry import CheckRegistry
from django.db import connection
from django.test import TestCase
class DatabaseCheckTests(TestCase):
@property
def func(self):
from django.core.checks.database import check_database_backends
return check_database_backends
def test_database_checks_not_run_by_default(self):
"""
`database` checks are only run when their tag is specified.
"""
def f1(**kwargs):
return [5]
registry = CheckRegistry()
registry.register(Tags.database)(f1)
errors = registry.run_checks()
self.assertEqual(errors, [])
errors2 = registry.run_checks(tags=[Tags.database])
self.assertEqual(errors2, [5])
def test_database_checks_called(self):
with mock.patch('django.db.backends.base.validation.BaseDatabaseValidation.check') as mocked_check:
run_checks(tags=[Tags.database])
self.assertTrue(mocked_check.called)
@unittest.skipUnless(connection.vendor == 'mysql', 'Test only for MySQL')
def test_mysql_strict_mode(self):
good_sql_modes = [
'STRICT_TRANS_TABLES,STRICT_ALL_TABLES',
'STRICT_TRANS_TABLES',
'STRICT_ALL_TABLES',
]
for response in good_sql_modes:
with mock.patch(
'django.db.backends.utils.CursorWrapper.fetchone', create=True,
return_value=(response,)
):
self.assertEqual(self.func(None), [])
bad_sql_modes = ['', 'WHATEVER']
for response in bad_sql_modes:
with mock.patch(
'django.db.backends.utils.CursorWrapper.fetchone', create=True,
return_value=(response,)
):
# One warning for each database alias
result = self.func(None)
self.assertEqual(len(result), 2)
self.assertEqual([r.id for r in result], ['mysql.W002', 'mysql.W002'])
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