Python TCP / IP客户端单元测试

Question

我使用以下那些代码的目的是通过TCP / IP连接连接到设备，并从该设备获取一些数据。我想与TDD一起发展。因此，我还使用unittest模块为此类编写了测试类。

设备类

class Device():

        def __init__(self, dev=None, **kwargs):
            if device:
                self.ip = dev.ip
                self.port = dev.port
            elif 'ip' in kwargs and 'port' in kwargs:
                self.ip = kwargs['ip']
                self.port = kwargs['port']
            else:
                raise ValueError("Dev object or ip and port must be provided!")

        def is_active(self):
            """Check if device is active"""
            with socket.socket() as s:
                try:
                    s.connect((self.ip, self.port))
                    s.sendall(b'temperature')
                    return True
                except Exception:
                    return False

        def get(self):

            with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
                s.connect((self.ip, self.port))
                print("connected")
                s.sendall(b'Hello, world')
                data = s.recv(1024)


            return self.data

测试类

logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)

def sample_device_model(ip='127.0.0.1', port=3306):
    return Dev.objects.create(
        ip=ip,
        port=port,
        name='testname'
    )

def run_fake_server():
    HOST = '127.0.0.1'  # Standard loopback interface address (localhost)
    PORT = 3306        # Port to listen on (non-privileged ports are > 1023)

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind((HOST, PORT))
        s.listen()
        conn, addr = s.accept()
        with conn:
            log = logging.getLogger("TestLog")
            log.debug('Connected by', addr)
            while True:
                data = conn.recv(1024)
                if not data:
                    break
                conn.sendall(data)

class TestDevice(TestCase):

    def setUp(self):
        self.server_thread = threading.Thread(target=run_fake_server, daemon=True)
        self.server_thread.start()

    def tearDown(self):
        self.server_thread.join()

    def test_is_active_property_working_server(self):
        """Test if is_active function working properly
        while server running"""
        ip = '127.0.0.6'
        port = 3306

        device = Device(
            ip=ip,
            port=port
        )
        self.assertTrue(device.is_active())

    def test_is_active_property_not_working_server(self):
        """Test is is_active function working properly
        while server not running"""
        ip = '127.0.0.5'
        port = 3306
        device = Device(ip=ip, port=port)
        self.assertFalse(device.is_active())

    def test_is_active_property_working_server_using_device(self):
        """Test if is_active function working properly
        while server running"""
        device = sample_device_model()

        device = Device(
            dev=dev
        )
        self.assertTrue(device.is_active())

    def test_is_active_property_not_working_server_using_device(self):
        """Test is is_active function working properly
        while server not running"""
        dev = sample_device_model(ip='127.0.0.5')

        device = Device(
            dev=dev
        )
        self.assertFalse(miner.is_active())

当我运行此测试时，它正在开始，然后只是等待。控制台输出如下。

Creating test database for alias 'default'...
DEBUG:asyncio:Using selector: EpollSelector
System check identified no issues (0 silenced).

很可能伪造服务器不接受连接。 是因为踩脚吗？我该如何解决这个问题？

还有其他方法可以对TCP客户端进行单元测试吗？

谢谢