first add files

lib/sqlalchemy/testing/mock.py

@@ -0,0 +1,32 @@
+# testing/mock.py
+# Copyright (C) 2005-2022 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+"""Import stub for mock library.
+"""
+from __future__ import absolute_import
+
+from ..util import py3k
+
+
+if py3k:
+    from unittest.mock import MagicMock
+    from unittest.mock import Mock
+    from unittest.mock import call
+    from unittest.mock import patch
+    from unittest.mock import ANY
+else:
+    try:
+        from mock import MagicMock  # noqa
+        from mock import Mock  # noqa
+        from mock import call  # noqa
+        from mock import patch  # noqa
+        from mock import ANY  # noqa
+    except ImportError:
+        raise ImportError(
+            "SQLAlchemy's test suite requires the "
+            "'mock' library as of 0.8.2."
+        )