path: root/src/python/grpcio_tests/tests/protoc_plugin/_split_definitions_test.py

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import collections
from concurrent import futures
import contextlib
import distutils.spawn
import errno
import importlib
import os
import os.path
import pkgutil
import shutil
import subprocess
import sys
import tempfile
import threading
import unittest

import grpc
from grpc_tools import protoc
from tests.unit.framework.common import test_constants

_MESSAGES_IMPORT = b'import "messages.proto";'

@contextlib.contextmanager
def _system_path(path):
  old_system_path = sys.path[:]
  sys.path = sys.path[0:1] + path + sys.path[1:]
  yield
  sys.path = old_system_path


class DummySplitServicer(object):

  def __init__(self, request_class, response_class):
    self.request_class = request_class
    self.response_class = response_class

  def Call(self, request, context):
    return self.response_class()


class SeparateTestMixin(object):

  def testImportAttributes(self):
    with _system_path([self.python_out_directory]):
      pb2 = importlib.import_module(self.pb2_import)
    pb2.Request
    pb2.Response
    if self.should_find_services_in_pb2:
      pb2.TestServiceServicer
    else:
      with self.assertRaises(AttributeError):
        pb2.TestServiceServicer

    with _system_path([self.grpc_python_out_directory]):
      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
    pb2_grpc.TestServiceServicer
    with self.assertRaises(AttributeError):
      pb2_grpc.Request
    with self.assertRaises(AttributeError):
      pb2_grpc.Response

  def testCall(self):
    with _system_path([self.python_out_directory]):
      pb2 = importlib.import_module(self.pb2_import)
    with _system_path([self.grpc_python_out_directory]):
      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
    server = grpc.server(
        futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
    pb2_grpc.add_TestServiceServicer_to_server(
        DummySplitServicer(
            pb2.Request, pb2.Response), server)
    port = server.add_insecure_port('[::]:0')
    server.start()
    channel = grpc.insecure_channel('localhost:{}'.format(port))
    stub = pb2_grpc.TestServiceStub(channel)
    request = pb2.Request()
    expected_response = pb2.Response()
    response = stub.Call(request)
    self.assertEqual(expected_response, response)


class CommonTestMixin(object):

  def testImportAttributes(self):
    with _system_path([self.python_out_directory]):
      pb2 = importlib.import_module(self.pb2_import)
    pb2.Request
    pb2.Response
    if self.should_find_services_in_pb2:
      pb2.TestServiceServicer
    else:
      with self.assertRaises(AttributeError):
        pb2.TestServiceServicer

    with _system_path([self.grpc_python_out_directory]):
      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
    pb2_grpc.TestServiceServicer
    with self.assertRaises(AttributeError):
      pb2_grpc.Request
    with self.assertRaises(AttributeError):
      pb2_grpc.Response

  def testCall(self):
    with _system_path([self.python_out_directory]):
      pb2 = importlib.import_module(self.pb2_import)
    with _system_path([self.grpc_python_out_directory]):
      pb2_grpc = importlib.import_module(self.pb2_grpc_import)
    server = grpc.server(
        futures.ThreadPoolExecutor(max_workers=test_constants.POOL_SIZE))
    pb2_grpc.add_TestServiceServicer_to_server(
        DummySplitServicer(
            pb2.Request, pb2.Response), server)
    port = server.add_insecure_port('[::]:0')
    server.start()
    channel = grpc.insecure_channel('localhost:{}'.format(port))
    stub = pb2_grpc.TestServiceStub(channel)
    request = pb2.Request()
    expected_response = pb2.Response()
    response = stub.Call(request)
    self.assertEqual(expected_response, response)


class SameSeparateTest(unittest.TestCase, SeparateTestMixin):

  def setUp(self):
    same_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
    self.directory = tempfile.mkdtemp(suffix='same_separate', dir='.')
    self.proto_directory = os.path.join(self.directory, 'proto_path')
    self.python_out_directory = os.path.join(self.directory, 'python_out')
    self.grpc_python_out_directory = os.path.join(self.directory, 'grpc_python_out')
    os.makedirs(self.proto_directory)
    os.makedirs(self.python_out_directory)
    os.makedirs(self.grpc_python_out_directory)
    same_proto_file = os.path.join(self.proto_directory, 'same_separate.proto')
    open(same_proto_file, 'wb').write(same_proto_contents)
    protoc_result = protoc.main([
        '',
        '--proto_path={}'.format(self.proto_directory),
        '--python_out={}'.format(self.python_out_directory),
        '--grpc_python_out=grpc_2_0:{}'.format(self.grpc_python_out_directory),
        same_proto_file,
    ])
    if protoc_result != 0:
      raise Exception("unexpected protoc error")
    open(os.path.join(self.grpc_python_out_directory, '__init__.py'), 'w').write('')
    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
    self.pb2_import = 'same_separate_pb2'
    self.pb2_grpc_import = 'same_separate_pb2_grpc'
    self.should_find_services_in_pb2 = False

  def tearDown(self):
    shutil.rmtree(self.directory)


class SameCommonTest(unittest.TestCase, CommonTestMixin):

  def setUp(self):
    same_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing', 'same.proto')
    self.directory = tempfile.mkdtemp(suffix='same_common', dir='.')
    self.proto_directory = os.path.join(self.directory, 'proto_path')
    self.python_out_directory = os.path.join(self.directory, 'python_out')
    self.grpc_python_out_directory = self.python_out_directory
    os.makedirs(self.proto_directory)
    os.makedirs(self.python_out_directory)
    same_proto_file = os.path.join(self.proto_directory, 'same_common.proto')
    open(same_proto_file, 'wb').write(same_proto_contents)
    protoc_result = protoc.main([
        '',
        '--proto_path={}'.format(self.proto_directory),
        '--python_out={}'.format(self.python_out_directory),
        '--grpc_python_out={}'.format(self.grpc_python_out_directory),
        same_proto_file,
    ])
    if protoc_result != 0:
      raise Exception("unexpected protoc error")
    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
    self.pb2_import = 'same_common_pb2'
    self.pb2_grpc_import = 'same_common_pb2_grpc'
    self.should_find_services_in_pb2 = True

  def tearDown(self):
    shutil.rmtree(self.directory)


class SplitCommonTest(unittest.TestCase, CommonTestMixin):

  def setUp(self):
    services_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing.split_services',
        'services.proto')
    messages_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing.split_messages',
        'messages.proto')
    self.directory = tempfile.mkdtemp(suffix='split_common', dir='.')
    self.proto_directory = os.path.join(self.directory, 'proto_path')
    self.python_out_directory = os.path.join(self.directory, 'python_out')
    self.grpc_python_out_directory = self.python_out_directory
    os.makedirs(self.proto_directory)
    os.makedirs(self.python_out_directory)
    services_proto_file = os.path.join(self.proto_directory,
                                       'split_common_services.proto')
    messages_proto_file = os.path.join(self.proto_directory,
                                       'split_common_messages.proto')
    open(services_proto_file, 'wb').write(services_proto_contents.replace(
        _MESSAGES_IMPORT,
        b'import "split_common_messages.proto";'
    ))
    open(messages_proto_file, 'wb').write(messages_proto_contents)
    protoc_result = protoc.main([
        '',
        '--proto_path={}'.format(self.proto_directory),
        '--python_out={}'.format(self.python_out_directory),
        '--grpc_python_out={}'.format(self.grpc_python_out_directory),
        services_proto_file,
        messages_proto_file,
    ])
    if protoc_result != 0:
      raise Exception("unexpected protoc error")
    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
    self.pb2_import = 'split_common_messages_pb2'
    self.pb2_grpc_import = 'split_common_services_pb2_grpc'
    self.should_find_services_in_pb2 = False

  def tearDown(self):
    shutil.rmtree(self.directory)


class SplitSeparateTest(unittest.TestCase, SeparateTestMixin):

  def setUp(self):
    services_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing.split_services',
        'services.proto')
    messages_proto_contents = pkgutil.get_data(
        'tests.protoc_plugin.protos.invocation_testing.split_messages',
        'messages.proto')
    self.directory = tempfile.mkdtemp(suffix='split_separate', dir='.')
    self.proto_directory = os.path.join(self.directory, 'proto_path')
    self.python_out_directory = os.path.join(self.directory, 'python_out')
    self.grpc_python_out_directory = os.path.join(self.directory, 'grpc_python_out')
    os.makedirs(self.proto_directory)
    os.makedirs(self.python_out_directory)
    os.makedirs(self.grpc_python_out_directory)
    services_proto_file = os.path.join(self.proto_directory,
                                       'split_separate_services.proto')
    messages_proto_file = os.path.join(self.proto_directory,
                                       'split_separate_messages.proto')
    open(services_proto_file, 'wb').write(services_proto_contents.replace(
        _MESSAGES_IMPORT,
        b'import "split_separate_messages.proto";'
    ))
    open(messages_proto_file, 'wb').write(messages_proto_contents)
    protoc_result = protoc.main([
        '',
        '--proto_path={}'.format(self.proto_directory),
        '--python_out={}'.format(self.python_out_directory),
        '--grpc_python_out=grpc_2_0:{}'.format(self.grpc_python_out_directory),
        services_proto_file,
        messages_proto_file,
    ])
    if protoc_result != 0:
      raise Exception("unexpected protoc error")
    open(os.path.join(self.python_out_directory, '__init__.py'), 'w').write('')
    self.pb2_import = 'split_separate_messages_pb2'
    self.pb2_grpc_import = 'split_separate_services_pb2_grpc'
    self.should_find_services_in_pb2 = False

  def tearDown(self):
    shutil.rmtree(self.directory)


if __name__ == '__main__':
  unittest.main(verbosity=2)