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import argparse
import contextlib
import errno
import itertools
import os
import subprocess
import sys
import time
import unittest
from grpc.framework.face import exceptions
from grpc.framework.foundation import future
# Identifiers of entities we expect to find in the generated module.
SERVICER_IDENTIFIER = 'EarlyAdopterTestServiceServicer'
SERVER_IDENTIFIER = 'EarlyAdopterTestServiceServer'
STUB_IDENTIFIER = 'EarlyAdopterTestServiceStub'
SERVER_FACTORY_IDENTIFIER = 'early_adopter_create_TestService_server'
STUB_FACTORY_IDENTIFIER = 'early_adopter_create_TestService_stub'
# Timeouts and delays.
SHORT_TIMEOUT = 0.1
NORMAL_TIMEOUT = 1
LONG_TIMEOUT = 2
DOES_NOT_MATTER_DELAY = 0
NO_DELAY = 0
LONG_DELAY = 1
# Assigned in __main__.
_build_mode = None
_port = None
class _ServicerMethods(object):
def __init__(self, test_pb2, delay):
self._paused = False
self._failed = False
self.test_pb2 = test_pb2
self.delay = delay
@contextlib.contextmanager
def pause(self): # pylint: disable=invalid-name
self._paused = True
yield
self._paused = False
@contextlib.contextmanager
def fail(self): # pylint: disable=invalid-name
self._failed = True
yield
self._failed = False
def _control(self): # pylint: disable=invalid-name
if self._failed:
raise ValueError()
time.sleep(self.delay)
while self._paused:
time.sleep(0)
def UnaryCall(self, request, context):
response = self.test_pb2.SimpleResponse()
response.payload.payload_type = self.test_pb2.COMPRESSABLE
response.payload.payload_compressable = 'a' * request.response_size
self._control()
return response
def StreamingOutputCall(self, request, context):
for parameter in request.response_parameters:
response = self.test_pb2.StreamingOutputCallResponse()
response.payload.payload_type = self.test_pb2.COMPRESSABLE
response.payload.payload_compressable = 'a' * parameter.size
self._control()
yield response
def StreamingInputCall(self, request_iter, context):
response = self.test_pb2.StreamingInputCallResponse()
aggregated_payload_size = 0
for request in request_iter:
aggregated_payload_size += len(request.payload.payload_compressable)
response.aggregated_payload_size = aggregated_payload_size
self._control()
return response
def FullDuplexCall(self, request_iter, context):
for request in request_iter:
for parameter in request.response_parameters:
response = self.test_pb2.StreamingOutputCallResponse()
response.payload.payload_type = self.test_pb2.COMPRESSABLE
response.payload.payload_compressable = 'a' * parameter.size
self._control()
yield response
def HalfDuplexCall(self, request_iter, context):
responses = []
for request in request_iter:
for parameter in request.response_parameters:
response = self.test_pb2.StreamingOutputCallResponse()
response.payload.payload_type = self.test_pb2.COMPRESSABLE
response.payload.payload_compressable = 'a' * parameter.size
self._control()
responses.append(response)
for response in responses:
yield response
def _CreateService(test_pb2, delay):
"""Provides a servicer backend and a stub.
The servicer is just the implementation
of the actual servicer passed to the face player of the python RPC
implementation; the two are detached.
Non-zero delay puts a delay on each call to the servicer, representative of
communication latency. Timeout is the default timeout for the stub while
waiting for the service.
Args:
test_pb2: the test_pb2 module generated by this test
delay: delay in seconds per response from the servicer
timeout: how long the stub will wait for the servicer by default.
Returns:
A two-tuple (servicer, stub), where the servicer is the back-end of the
service bound to the stub.
"""
servicer_methods = _ServicerMethods(test_pb2, delay)
class Servicer(getattr(test_pb2, SERVICER_IDENTIFIER)):
def UnaryCall(self, request, context):
return servicer_methods.UnaryCall(request, context)
def StreamingOutputCall(self, request, context):
return servicer_methods.StreamingOutputCall(request, context)
def StreamingInputCall(self, request_iter, context):
return servicer_methods.StreamingInputCall(request_iter, context)
def FullDuplexCall(self, request_iter, context):
return servicer_methods.FullDuplexCall(request_iter, context)
def HalfDuplexCall(self, request_iter, context):
return servicer_methods.HalfDuplexCall(request_iter, context)
servicer = Servicer()
server = getattr(test_pb2, SERVER_FACTORY_IDENTIFIER)(servicer, _port,
None, None)
stub = getattr(test_pb2, STUB_FACTORY_IDENTIFIER)('localhost', _port)
return servicer_methods, stub, server
def StreamingInputRequest(test_pb2):
for _ in range(3):
request = test_pb2.StreamingInputCallRequest()
request.payload.payload_type = test_pb2.COMPRESSABLE
request.payload.payload_compressable = 'a'
yield request
def StreamingOutputRequest(test_pb2):
request = test_pb2.StreamingOutputCallRequest()
sizes = [1, 2, 3]
request.response_parameters.add(size=sizes[0], interval_us=0)
request.response_parameters.add(size=sizes[1], interval_us=0)
request.response_parameters.add(size=sizes[2], interval_us=0)
return request
def FullDuplexRequest(test_pb2):
request = test_pb2.StreamingOutputCallRequest()
request.response_parameters.add(size=1, interval_us=0)
yield request
request = test_pb2.StreamingOutputCallRequest()
request.response_parameters.add(size=2, interval_us=0)
request.response_parameters.add(size=3, interval_us=0)
yield request
class PythonPluginTest(unittest.TestCase):
"""Test case for the gRPC Python protoc-plugin.
While reading these tests, remember that the futures API
(`stub.method.async()`) only gives futures for the *non-streaming* responses,
else it behaves like its blocking cousin.
"""
def setUp(self):
protoc_command = '../../bins/%s/protobuf/protoc' % _build_mode
protoc_plugin_filename = '../../bins/%s/grpc_python_plugin' % _build_mode
test_proto_filename = './test.proto'
if not os.path.isfile(protoc_command):
# Assume that if we haven't built protoc that it's on the system.
protoc_command = 'protoc'
# Ensure that the output directory exists.
outdir = '../../gens/test/compiler/python'
try:
os.makedirs(outdir)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
# Invoke protoc with the plugin.
cmd = [
protoc_command,
'--plugin=protoc-gen-python-grpc=%s' % protoc_plugin_filename,
'-I %s' % os.path.dirname(test_proto_filename),
'--python_out=%s' % outdir,
'--python-grpc_out=%s' % outdir,
os.path.basename(test_proto_filename),
]
subprocess.call(' '.join(cmd), shell=True)
sys.path.append(outdir)
# TODO(atash): Figure out which of theses tests is hanging flakily with small
# probability.
def testImportAttributes(self):
# check that we can access the generated module and its members.
import test_pb2 # pylint: disable=g-import-not-at-top
self.assertIsNotNone(getattr(test_pb2, SERVICER_IDENTIFIER, None))
self.assertIsNotNone(getattr(test_pb2, SERVER_IDENTIFIER, None))
self.assertIsNotNone(getattr(test_pb2, STUB_IDENTIFIER, None))
self.assertIsNotNone(getattr(test_pb2, SERVER_FACTORY_IDENTIFIER, None))
self.assertIsNotNone(getattr(test_pb2, STUB_FACTORY_IDENTIFIER, None))
def testUpDown(self):
import test_pb2
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
pass
def testUnaryCall(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
response = stub.UnaryCall(request, NORMAL_TIMEOUT)
expected_response = servicer.UnaryCall(request, None)
self.assertEqual(expected_response, response)
def testUnaryCallAsync(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, LONG_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
start_time = time.clock()
response_future = stub.UnaryCall.async(request, LONG_TIMEOUT)
# Check that we didn't block on the asynchronous call.
self.assertGreater(LONG_DELAY, time.clock() - start_time)
response = response_future.result()
expected_response = servicer.UnaryCall(request, None)
self.assertEqual(expected_response, response)
def testUnaryCallAsyncExpired(self):
import test_pb2 # pylint: disable=g-import-not-at-top
# set the timeout super low...
servicer, stub, server = _CreateService(test_pb2,
delay=DOES_NOT_MATTER_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
with servicer.pause():
response_future = stub.UnaryCall.async(request, SHORT_TIMEOUT)
with self.assertRaises(exceptions.ExpirationError):
response_future.result()
def testUnaryCallAsyncCancelled(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
with servicer.pause():
response_future = stub.UnaryCall.async(request, 1)
response_future.cancel()
self.assertTrue(response_future.cancelled())
def testUnaryCallAsyncFailed(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = test_pb2.SimpleRequest(response_size=13)
with server, stub:
with servicer.fail():
response_future = stub.UnaryCall.async(request, NORMAL_TIMEOUT)
self.assertIsNotNone(response_future.exception())
def testStreamingOutputCall(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
request = StreamingOutputRequest(test_pb2)
with server, stub:
responses = stub.StreamingOutputCall(request, NORMAL_TIMEOUT)
expected_responses = servicer.StreamingOutputCall(request, None)
for check in itertools.izip_longest(expected_responses, responses):
expected_response, response = check
self.assertEqual(expected_response, response)
def testStreamingOutputCallExpired(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = StreamingOutputRequest(test_pb2)
with server, stub:
with servicer.pause():
responses = stub.StreamingOutputCall(request, SHORT_TIMEOUT)
with self.assertRaises(exceptions.ExpirationError):
list(responses)
def testStreamingOutputCallCancelled(self):
import test_pb2 # pylint: disable=g-import-not-at-top
unused_servicer, stub, server = _CreateService(test_pb2,
DOES_NOT_MATTER_DELAY)
request = StreamingOutputRequest(test_pb2)
with server, stub:
responses = stub.StreamingOutputCall(request, SHORT_TIMEOUT)
next(responses)
responses.cancel()
with self.assertRaises(future.CancelledError):
next(responses)
@unittest.skip('TODO(atash,nathaniel): figure out why this times out '
'instead of raising the proper error.')
def testStreamingOutputCallFailed(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = StreamingOutputRequest(test_pb2)
with server, stub:
with servicer.fail():
responses = stub.StreamingOutputCall(request, 1)
self.assertIsNotNone(responses)
with self.assertRaises(exceptions.ServicerError):
next(responses)
def testStreamingInputCall(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
with server, stub:
response = stub.StreamingInputCall(StreamingInputRequest(test_pb2),
NORMAL_TIMEOUT)
expected_response = servicer.StreamingInputCall(
StreamingInputRequest(test_pb2), None)
self.assertEqual(expected_response, response)
def testStreamingInputCallAsync(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(
test_pb2, LONG_DELAY)
with server, stub:
start_time = time.clock()
response_future = stub.StreamingInputCall.async(
StreamingInputRequest(test_pb2), LONG_TIMEOUT)
self.assertGreater(LONG_DELAY, time.clock() - start_time)
response = response_future.result()
expected_response = servicer.StreamingInputCall(
StreamingInputRequest(test_pb2), None)
self.assertEqual(expected_response, response)
def testStreamingInputCallAsyncExpired(self):
import test_pb2 # pylint: disable=g-import-not-at-top
# set the timeout super low...
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
with server, stub:
with servicer.pause():
response_future = stub.StreamingInputCall.async(
StreamingInputRequest(test_pb2), SHORT_TIMEOUT)
with self.assertRaises(exceptions.ExpirationError):
response_future.result()
self.assertIsInstance(
response_future.exception(), exceptions.ExpirationError)
def testStreamingInputCallAsyncCancelled(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
with server, stub:
with servicer.pause():
response_future = stub.StreamingInputCall.async(
StreamingInputRequest(test_pb2), NORMAL_TIMEOUT)
response_future.cancel()
self.assertTrue(response_future.cancelled())
with self.assertRaises(future.CancelledError):
response_future.result()
def testStreamingInputCallAsyncFailed(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
with server, stub:
with servicer.fail():
response_future = stub.StreamingInputCall.async(
StreamingInputRequest(test_pb2), SHORT_TIMEOUT)
self.assertIsNotNone(response_future.exception())
def testFullDuplexCall(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
with server, stub:
responses = stub.FullDuplexCall(FullDuplexRequest(test_pb2),
NORMAL_TIMEOUT)
expected_responses = servicer.FullDuplexCall(FullDuplexRequest(test_pb2),
None)
for check in itertools.izip_longest(expected_responses, responses):
expected_response, response = check
self.assertEqual(expected_response, response)
def testFullDuplexCallExpired(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = FullDuplexRequest(test_pb2)
with server, stub:
with servicer.pause():
responses = stub.FullDuplexCall(request, SHORT_TIMEOUT)
with self.assertRaises(exceptions.ExpirationError):
list(responses)
def testFullDuplexCallCancelled(self):
import test_pb2 # pylint: disable=g-import-not-at-top
unused_servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
with server, stub:
request = FullDuplexRequest(test_pb2)
responses = stub.FullDuplexCall(request, NORMAL_TIMEOUT)
next(responses)
responses.cancel()
with self.assertRaises(future.CancelledError):
next(responses)
@unittest.skip('TODO(atash,nathaniel): figure out why this hangs forever '
'and fix.')
def testFullDuplexCallFailed(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, DOES_NOT_MATTER_DELAY)
request = FullDuplexRequest(test_pb2)
with server, stub:
with servicer.fail():
responses = stub.FullDuplexCall(request, NORMAL_TIMEOUT)
self.assertIsNotNone(responses)
with self.assertRaises(exceptions.ServicerError):
next(responses)
def testHalfDuplexCall(self):
import test_pb2 # pylint: disable=g-import-not-at-top
servicer, stub, server = _CreateService(test_pb2, NO_DELAY)
def HalfDuplexRequest():
request = test_pb2.StreamingOutputCallRequest()
request.response_parameters.add(size=1, interval_us=0)
yield request
request = test_pb2.StreamingOutputCallRequest()
request.response_parameters.add(size=2, interval_us=0)
request.response_parameters.add(size=3, interval_us=0)
yield request
with server, stub:
responses = stub.HalfDuplexCall(HalfDuplexRequest(), NORMAL_TIMEOUT)
expected_responses = servicer.HalfDuplexCall(HalfDuplexRequest(), None)
for check in itertools.izip_longest(expected_responses, responses):
expected_response, response = check
self.assertEqual(expected_response, response)
def testHalfDuplexCallWedged(self):
import test_pb2 # pylint: disable=g-import-not-at-top
_, stub, server = _CreateService(test_pb2, NO_DELAY)
wait_flag = [False]
@contextlib.contextmanager
def wait(): # pylint: disable=invalid-name
# Where's Python 3's 'nonlocal' statement when you need it?
wait_flag[0] = True
yield
wait_flag[0] = False
def HalfDuplexRequest():
request = test_pb2.StreamingOutputCallRequest()
request.response_parameters.add(size=1, interval_us=0)
yield request
while wait_flag[0]:
time.sleep(0.1)
with server, stub:
with wait():
responses = stub.HalfDuplexCall(HalfDuplexRequest(), NORMAL_TIMEOUT)
# half-duplex waits for the client to send all info
with self.assertRaises(exceptions.ExpirationError):
next(responses)
if __name__ == '__main__':
os.chdir(os.path.dirname(sys.argv[0]))
parser = argparse.ArgumentParser(
description='Run Python compiler plugin test.')
parser.add_argument(
'--build_mode', dest='build_mode', type=str, default='dbg',
help='The build mode of the targets to test, e.g. "dbg", "opt", "asan", '
'etc.')
parser.add_argument('--port', dest='port', type=int, default=0)
args, remainder = parser.parse_known_args()
_build_mode = args.build_mode
_port = args.port
sys.argv[1:] = remainder
unittest.main()