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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) typedef int GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
import txaio
from util import run_once
def test_cancel(framework):
cancels = []
def it_died(f):
cancels.append(f)
f = txaio.create_future(canceller=it_died)
# both Future and Deferred have .cancel() methods .. but seemed
# more "symmetric"/expected to make a method? But could just stick
# with "f.cancel()" here ...
txaio.cancel(f)
# at least for Twisted, we have to "handle" the "CancelledError"
# -- in practice, dropping a future on the floor with no
# error-handler is A Bad Thing anyway
txaio.add_callbacks(f, None, lambda _: None)
run_once()
run_once()
assert cancels == [f]
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