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# testing/warnings.py
# Copyright (C) 2005-2014 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""NOTE: copied/adapted from SQLAlchemy master for backwards compatibility;
this should be removable when Alembic targets SQLAlchemy 0.9.4.
"""
from __future__ import absolute_import
import warnings
from sqlalchemy import exc as sa_exc
import re
def setup_filters():
"""Set global warning behavior for the test suite."""
warnings.filterwarnings('ignore',
category=sa_exc.SAPendingDeprecationWarning)
warnings.filterwarnings('error', category=sa_exc.SADeprecationWarning)
warnings.filterwarnings('error', category=sa_exc.SAWarning)
def assert_warnings(fn, warning_msgs, regex=False):
"""Assert that each of the given warnings are emitted by fn."""
from .assertions import eq_
with warnings.catch_warnings(record=True) as log:
# ensure that nothing is going into __warningregistry__
warnings.filterwarnings("always")
result = fn()
for warning in log:
popwarn = warning_msgs.pop(0)
if regex:
assert re.match(popwarn, str(warning.message))
else:
eq_(popwarn, str(warning.message))
return result
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