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from unittest import mock, skipUnless
from django.db import OperationalError, connection
from django.test import TestCase
@skipUnless(connection.vendor == "sqlite", "SQLite tests.")
class FeaturesTests(TestCase):
def test_supports_json_field_operational_error(self):
if hasattr(connection.features, "supports_json_field"):
del connection.features.supports_json_field
msg = "unable to open database file"
with mock.patch.object(
connection,
"cursor",
side_effect=OperationalError(msg),
):
with self.assertRaisesMessage(OperationalError, msg):
connection.features.supports_json_field
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