diff options
Diffstat (limited to 'src/python/grpcio_tests/tests/unit/_metadata_flags_test.py')
| -rw-r--r-- | src/python/grpcio_tests/tests/unit/_metadata_flags_test.py | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/python/grpcio_tests/tests/unit/_metadata_flags_test.py b/src/python/grpcio_tests/tests/unit/_metadata_flags_test.py new file mode 100644 index 0000000000..2d352e99d4 --- /dev/null +++ b/src/python/grpcio_tests/tests/unit/_metadata_flags_test.py @@ -0,0 +1,251 @@ +# Copyright 2018 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. +"""Tests metadata flags feature by testing wait-for-ready semantics""" + +import time +import weakref +import unittest +import threading +import socket +from six.moves import queue + +import grpc + +from tests.unit import test_common +from tests.unit.framework.common import test_constants + +_UNARY_UNARY = '/test/UnaryUnary' +_UNARY_STREAM = '/test/UnaryStream' +_STREAM_UNARY = '/test/StreamUnary' +_STREAM_STREAM = '/test/StreamStream' + +_REQUEST = b'\x00\x00\x00' +_RESPONSE = b'\x00\x00\x00' + + +def handle_unary_unary(test, request, servicer_context): + return _RESPONSE + + +def handle_unary_stream(test, request, servicer_context): + for _ in range(test_constants.STREAM_LENGTH): + yield _RESPONSE + + +def handle_stream_unary(test, request_iterator, servicer_context): + for _ in request_iterator: + pass + return _RESPONSE + + +def handle_stream_stream(test, request_iterator, servicer_context): + for _ in request_iterator: + yield _RESPONSE + + +class _MethodHandler(grpc.RpcMethodHandler): + + def __init__(self, test, request_streaming, response_streaming): + self.request_streaming = request_streaming + self.response_streaming = response_streaming + self.request_deserializer = None + self.response_serializer = None + self.unary_unary = None + self.unary_stream = None + self.stream_unary = None + self.stream_stream = None + if self.request_streaming and self.response_streaming: + self.stream_stream = lambda req, ctx: handle_stream_stream(test, req, ctx) + elif self.request_streaming: + self.stream_unary = lambda req, ctx: handle_stream_unary(test, req, ctx) + elif self.response_streaming: + self.unary_stream = lambda req, ctx: handle_unary_stream(test, req, ctx) + else: + self.unary_unary = lambda req, ctx: handle_unary_unary(test, req, ctx) + + +class _GenericHandler(grpc.GenericRpcHandler): + + def __init__(self, test): + self._test = test + + def service(self, handler_call_details): + if handler_call_details.method == _UNARY_UNARY: + return _MethodHandler(self._test, False, False) + elif handler_call_details.method == _UNARY_STREAM: + return _MethodHandler(self._test, False, True) + elif handler_call_details.method == _STREAM_UNARY: + return _MethodHandler(self._test, True, False) + elif handler_call_details.method == _STREAM_STREAM: + return _MethodHandler(self._test, True, True) + else: + return None + + +def get_free_loopback_tcp_port(): + tcp = socket.socket(socket.AF_INET6) + tcp.bind(('', 0)) + address_tuple = tcp.getsockname() + return tcp, "[::1]:%s" % (address_tuple[1]) + + +def create_dummy_channel(): + """Creating dummy channels is a workaround for retries""" + _, addr = get_free_loopback_tcp_port() + return grpc.insecure_channel(addr) + + +def perform_unary_unary_call(channel, wait_for_ready=None): + channel.unary_unary(_UNARY_UNARY).__call__( + _REQUEST, + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + + +def perform_unary_unary_with_call(channel, wait_for_ready=None): + channel.unary_unary(_UNARY_UNARY).with_call( + _REQUEST, + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + + +def perform_unary_unary_future(channel, wait_for_ready=None): + channel.unary_unary(_UNARY_UNARY).future( + _REQUEST, + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready).result( + timeout=test_constants.LONG_TIMEOUT) + + +def perform_unary_stream_call(channel, wait_for_ready=None): + response_iterator = channel.unary_stream(_UNARY_STREAM).__call__( + _REQUEST, + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + for _ in response_iterator: + pass + + +def perform_stream_unary_call(channel, wait_for_ready=None): + channel.stream_unary(_STREAM_UNARY).__call__( + iter([_REQUEST] * test_constants.STREAM_LENGTH), + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + + +def perform_stream_unary_with_call(channel, wait_for_ready=None): + channel.stream_unary(_STREAM_UNARY).with_call( + iter([_REQUEST] * test_constants.STREAM_LENGTH), + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + + +def perform_stream_unary_future(channel, wait_for_ready=None): + channel.stream_unary(_STREAM_UNARY).future( + iter([_REQUEST] * test_constants.STREAM_LENGTH), + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready).result( + timeout=test_constants.LONG_TIMEOUT) + + +def perform_stream_stream_call(channel, wait_for_ready=None): + response_iterator = channel.stream_stream(_STREAM_STREAM).__call__( + iter([_REQUEST] * test_constants.STREAM_LENGTH), + timeout=test_constants.LONG_TIMEOUT, + wait_for_ready=wait_for_ready) + for _ in response_iterator: + pass + + +_ALL_CALL_CASES = [ + perform_unary_unary_call, perform_unary_unary_with_call, + perform_unary_unary_future, perform_unary_stream_call, + perform_stream_unary_call, perform_stream_unary_with_call, + perform_stream_unary_future, perform_stream_stream_call +] + + +class MetadataFlagsTest(unittest.TestCase): + + def check_connection_does_failfast(self, fn, channel, wait_for_ready=None): + try: + fn(channel, wait_for_ready) + self.fail("The Call should fail") + except BaseException as e: # pylint: disable=broad-except + self.assertIn('StatusCode.UNAVAILABLE', str(e)) + + def test_call_wait_for_ready_default(self): + for perform_call in _ALL_CALL_CASES: + self.check_connection_does_failfast(perform_call, + create_dummy_channel()) + + def test_call_wait_for_ready_disabled(self): + for perform_call in _ALL_CALL_CASES: + self.check_connection_does_failfast( + perform_call, create_dummy_channel(), wait_for_ready=False) + + def test_call_wait_for_ready_enabled(self): + # To test the wait mechanism, Python thread is required to make + # client set up first without handling them case by case. + # Also, Python thread don't pass the unhandled exceptions to + # main thread. So, it need another method to store the + # exceptions and raise them again in main thread. + unhandled_exceptions = queue.Queue() + tcp, addr = get_free_loopback_tcp_port() + wg = test_common.WaitGroup(len(_ALL_CALL_CASES)) + + def wait_for_transient_failure(channel_connectivity): + if channel_connectivity == grpc.ChannelConnectivity.TRANSIENT_FAILURE: + wg.done() + + def test_call(perform_call): + try: + channel = grpc.insecure_channel(addr) + channel.subscribe(wait_for_transient_failure) + perform_call(channel, wait_for_ready=True) + except BaseException as e: # pylint: disable=broad-except + # If the call failed, the thread would be destroyed. The channel + # object can be collected before calling the callback, which + # will result in a deadlock. + wg.done() + unhandled_exceptions.put(e, True) + + test_threads = [] + for perform_call in _ALL_CALL_CASES: + test_thread = threading.Thread( + target=test_call, args=(perform_call,)) + test_thread.exception = None + test_thread.start() + test_threads.append(test_thread) + + # Start the server after the connections are waiting + wg.wait() + tcp.close() + server = test_common.test_server() + server.add_generic_rpc_handlers((_GenericHandler(weakref.proxy(self)),)) + server.add_insecure_port(addr) + server.start() + + for test_thread in test_threads: + test_thread.join() + + # Stop the server to make test end properly + server.stop(0) + + if not unhandled_exceptions.empty(): + raise unhandled_exceptions.get(True) + + +if __name__ == '__main__': + unittest.main(verbosity=2) |