如何用Python编写GRPC服务器的单元测试?

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问题描述

我想使用Python unittest为我的GRPC服务器实现编写测试.我找到了 grpcio-testing 程序包，但找不到任何文档来使用它.

I would like to use Python unittest to write tests for my GRPC server implementation. I have found grpcio-testing package but I could not find any documentation how to use this.

假设我有以下服务器:

import helloworld_pb2
import helloworld_pb2_grpc


class Greeter(helloworld_pb2_grpc.GreeterServicer):
    def SayHello(self, request, context):
        return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)

如何创建调用SayHello的单元测试并检查响应?

How do I create an unit test to call SayHello and check the response?

推荐答案

您可以在setUp时启动真实的服务器，在tearDown时停止服务器.

You can start a real server When setUp and stop the server when tearDown.

import unittest
from concurrent import futures


class RPCGreeterServerTest(unittest.TestCase):
    server_class = Greeter
    port = 50051

    def setUp(self):
        self.server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))

        helloworld_pb2_grpc.add_GreeterServicer_to_server(self.server_class(), self.server)
        self.server.add_insecure_port(f'[::]:{self.port}')
        self.server.start()

    def tearDown(self):
        self.server.stop(None)

    def test_server(self):
        with grpc.insecure_channel(f'localhost:{self.port}') as channel:
            stub = helloworld_pb2_grpc.GreeterStub(channel)
            response = stub.SayHello(helloworld_pb2.HelloRequest(name='Jack'))
        self.assertEqual(response.message, 'Hello, Jack!')

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sayhello