How to use the pyads.ads function in pyads

def test_read_check_length(self):
        # Write data shorter than what should be read
        ads.write(
            self.endpoint,
            value=1,
            index_group=constants.INDEXGROUP_DATA,
            index_offset=1,
            plc_datatype=constants.PLCTYPE_USINT,
        )

        with self.assertRaises(RuntimeError):
            # Since the length is checked, this must give an error
            ads.read(
                self.endpoint,
                index_group=constants.INDEXGROUP_DATA,
                index_offset=1,
                plc_datatype=constants.PLCTYPE_UINT,
                check_length=True,
            )

        # If the length is not checked, no error should be raised
        value = ads.read(
            self.endpoint,
            index_group=constants.INDEXGROUP_DATA,
            index_offset=1,
            plc_datatype=constants.PLCTYPE_UINT,
            check_length=False,
        )
        self.assertEqual(value, 1)

def test_read_check_length(self):
        # Write data shorter than what should be read
        ads.write(
            self.endpoint,
            value=1,
            index_group=constants.INDEXGROUP_DATA,
            index_offset=1,
            plc_datatype=constants.PLCTYPE_USINT,
        )

        with self.assertRaises(RuntimeError):
            # Since the length is checked, this must give an error
            ads.read(
                self.endpoint,
                index_group=constants.INDEXGROUP_DATA,
                index_offset=1,
                plc_datatype=constants.PLCTYPE_UINT,
                check_length=True,
            )

def test_write_float(self):
        value = 123.456

        ads.write(
            self.endpoint,
            index_group=constants.INDEXGROUP_DATA,
            index_offset=1,
            value=value,
            plc_datatype=constants.PLCTYPE_REAL,
        )

        # Retrieve list of received requests from server
        requests = self.test_server.request_history

        # Assert that the server received a request
        self.assertEqual(len(requests), 1)

        # Assert that the server received the correct command
        self.assert_command_id(requests[0], constants.ADSCOMMAND_WRITE)

def tearDownClass(cls):
        cls.test_server.stop()

        # wait a bit for server to shutdown
        time.sleep(1)

        ads.close_port()

        if platform_is_linux():
            ads.delete_route(cls.endpoint)

cls.test_server = AdsTestServer(AdvancedHandler(), logging=False)
        cls.test_server.start()

        # Endpoint AMS Address
        cls.endpoint = AmsAddr(TEST_SERVER_AMS_NET_ID, TEST_SERVER_AMS_PORT)

        # Open AMS Port
        ads.open_port()

        # wait a bit otherwise error might occur
        time.sleep(1)

        # NOTE: On a Windows machine, this route needs to be configured
        # within the router service for the tests to work.
        if platform_is_linux():
            ads.add_route(cls.endpoint, TEST_SERVER_IP_ADDRESS)

def tearDownClass(cls):
        cls.test_server.stop()

        # wait a bit for server to shutdown
        time.sleep(1)

        ads.close_port()

        if platform_is_linux():
            ads.delete_route(cls.endpoint)

def setUpClass(cls):
        # Start dummy ADS Endpoint
        cls.test_server = AdsTestServer(AdvancedHandler(), logging=False)
        cls.test_server.start()

        # Endpoint AMS Address
        cls.endpoint = AmsAddr(TEST_SERVER_AMS_NET_ID, TEST_SERVER_AMS_PORT)

        # Open AMS Port
        ads.open_port()

        # wait a bit otherwise error might occur
        time.sleep(1)

        # NOTE: On a Windows machine, this route needs to be configured
        # within the router service for the tests to work.
        if platform_is_linux():
            ads.add_route(cls.endpoint, TEST_SERVER_IP_ADDRESS)

def setUpClass(cls):
        # Start dummy ADS Endpoint
        cls.test_server = AdsTestServer(logging=False)
        cls.test_server.start()

        # Endpoint AMS Address
        cls.endpoint = AmsAddr(TEST_SERVER_AMS_NET_ID, TEST_SERVER_AMS_PORT)

        # Open AMS Port
        ads.open_port()

        # wait a bit otherwise error might occur
        time.sleep(1)

        # NOTE: On a Windows machine, this route needs to be configured
        # within the router service for the tests to work.
        if platform_is_linux():
            ads.add_route(cls.endpoint, TEST_SERVER_IP_ADDRESS)

netid = pyads.get_local_address().netid
            self.assertEqual(netid, "0.0.0.0.1.5")

            # Change netid by String
            pyads.set_local_address("0.0.0.0.1.6")
            netid = pyads.get_local_address().netid
            self.assertEqual(netid, "0.0.0.0.1.6")

            # Change netid by Struct
            pyads.set_local_address(org_adr.netIdStruct())
            netid = pyads.get_local_address().netid
            self.assertEqual(netid, org_netid)

            # Check raised error on short netid
            with self.assertRaises(ValueError):
                pyads.ads.set_local_address("1.2.3")

            # Check raised error on invalid netid
            with self.assertRaises(ValueError):
                pyads.set_local_address("1.2.3.a")

            # Check wrong netid datatype
            with self.assertRaises(AssertionError):
                pyads.set_local_address(123)