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# Author: Ovidiu Predescu
# Date: July 2011
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sys
import unittest
from tornado.testing import AsyncTestCase, gen_test
try:
from twisted.internet.defer import inlineCallbacks # type: ignore
have_twisted = True
except ImportError:
have_twisted = False
except Exception:
# Twisted is currently incompatible with the first 3.14 alpha release; disable this
# test until the beta when it will hopefully be fixed (note that this requires us to
# update our requirements.txt to pick up a new version of twisted).
if sys.version_info[:2] == (3, 14) and sys.version_info.releaselevel == "alpha":
have_twisted = False
else:
raise
else:
# Not used directly but needed for `yield deferred` to work.
import tornado.platform.twisted # noqa: F401
skipIfNoTwisted = unittest.skipUnless(have_twisted, "twisted module not present")
@skipIfNoTwisted
class ConvertDeferredTest(AsyncTestCase):
@gen_test
def test_success(self):
@inlineCallbacks
def fn():
if False:
# inlineCallbacks doesn't work with regular functions;
# must have a yield even if it's unreachable.
yield
return 42
res = yield fn()
self.assertEqual(res, 42)
@gen_test
def test_failure(self):
@inlineCallbacks
def fn():
if False:
yield
1 / 0
with self.assertRaises(ZeroDivisionError):
yield fn()
if __name__ == "__main__":
unittest.main()
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