57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
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# testing/warnings.py
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# Copyright (C) 2005-2014 the SQLAlchemy authors and contributors <see AUTHORS file>
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#
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# This module is part of SQLAlchemy and is released under
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# the MIT License: http://www.opensource.org/licenses/mit-license.php
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from __future__ import absolute_import
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import warnings
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from .. import exc as sa_exc
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from .. import util
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import re
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def testing_warn(msg, stacklevel=3):
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"""Replaces sqlalchemy.util.warn during tests."""
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filename = "sqlalchemy.testing.warnings"
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lineno = 1
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if isinstance(msg, util.string_types):
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warnings.warn_explicit(msg, sa_exc.SAWarning, filename, lineno)
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else:
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warnings.warn_explicit(msg, filename, lineno)
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def resetwarnings():
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"""Reset warning behavior to testing defaults."""
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util.warn = util.langhelpers.warn = testing_warn
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warnings.filterwarnings('ignore',
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category=sa_exc.SAPendingDeprecationWarning)
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warnings.filterwarnings('error', category=sa_exc.SADeprecationWarning)
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warnings.filterwarnings('error', category=sa_exc.SAWarning)
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def assert_warnings(fn, warnings, regex=False):
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"""Assert that each of the given warnings are emitted by fn."""
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from .assertions import eq_, emits_warning
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canary = []
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orig_warn = util.warn
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def capture_warnings(*args, **kw):
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orig_warn(*args, **kw)
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popwarn = warnings.pop(0)
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canary.append(popwarn)
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if regex:
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assert re.match(popwarn, args[0])
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else:
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eq_(args[0], popwarn)
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util.warn = util.langhelpers.warn = capture_warnings
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result = emits_warning()(fn)()
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assert canary, "No warning was emitted"
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return result
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