# Copyright 2016 gRPC authors.
#
# 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.
"""Test a corner-case at the level of the Cython API."""

import threading
import unittest

from grpc._cython import cygrpc
from tests.unit._cython import test_utilities

_EMPTY_FLAGS = 0
_EMPTY_METADATA = ()


class _ServerDriver(object):

    def __init__(self, completion_queue, shutdown_tag):
        self._condition = threading.Condition()
        self._completion_queue = completion_queue
        self._shutdown_tag = shutdown_tag
        self._events = []
        self._saw_shutdown_tag = False

    def start(self):