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# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""A utility useful in tests of asynchronous, event-driven interfaces."""
import threading
from grpc.framework.foundation import stream
class Callback(stream.Consumer):
"""A utility object useful in tests of asynchronous code."""
def __init__(self):
self._condition = threading.Condition()
self._unary_response = None
self._streamed_responses = []
self._completed = False
self._abortion = None
def abort(self, abortion):
with self._condition:
self._abortion = abortion
self._condition.notify_all()
def complete(self, unary_response):
with self._condition:
self._unary_response = unary_response
self._completed = True
self._condition.notify_all()
def consume(self, streamed_response):
with self._condition:
self._streamed_responses.append(streamed_response)
def terminate(self):
with self._condition:
self._completed = True
self._condition.notify_all()
def consume_and_terminate(self, streamed_response):
with self._condition:
self._streamed_responses.append(streamed_response)
self._completed = True
self._condition.notify_all()
def block_until_terminated(self):
with self._condition:
while self._abortion is None and not self._completed:
self._condition.wait()
def response(self):
with self._condition:
if self._abortion is None:
return self._unary_response
else:
raise AssertionError('Aborted with abortion "%s"!' % self._abortion)
def responses(self):
with self._condition:
if self._abortion is None:
return list(self._streamed_responses)
else:
raise AssertionError('Aborted with abortion "%s"!' % self._abortion)
def abortion(self):
with self._condition:
return self._abortion
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