diff options
Diffstat (limited to 'tests/unittests/sources/helpers/test_netlink.py')
| -rw-r--r-- | tests/unittests/sources/helpers/test_netlink.py | 357 |
1 files changed, 225 insertions, 132 deletions
diff --git a/tests/unittests/sources/helpers/test_netlink.py b/tests/unittests/sources/helpers/test_netlink.py index 478ce375..5eabf104 100644 --- a/tests/unittests/sources/helpers/test_netlink.py +++ b/tests/unittests/sources/helpers/test_netlink.py @@ -2,48 +2,64 @@ # # This file is part of cloud-init. See LICENSE file for license information. -from tests.unittests.helpers import CiTestCase, mock +import codecs import socket import struct -import codecs + from cloudinit.sources.helpers.netlink import ( - NetlinkCreateSocketError, create_bound_netlink_socket, read_netlink_socket, - read_rta_oper_state, unpack_rta_attr, wait_for_media_disconnect_connect, - wait_for_nic_attach_event, wait_for_nic_detach_event, - OPER_DOWN, OPER_UP, OPER_DORMANT, OPER_LOWERLAYERDOWN, OPER_NOTPRESENT, - OPER_TESTING, OPER_UNKNOWN, RTATTR_START_OFFSET, RTM_NEWLINK, RTM_DELLINK, - RTM_SETLINK, RTM_GETLINK, MAX_SIZE) + MAX_SIZE, + OPER_DORMANT, + OPER_DOWN, + OPER_LOWERLAYERDOWN, + OPER_NOTPRESENT, + OPER_TESTING, + OPER_UNKNOWN, + OPER_UP, + RTATTR_START_OFFSET, + RTM_DELLINK, + RTM_GETLINK, + RTM_NEWLINK, + RTM_SETLINK, + NetlinkCreateSocketError, + create_bound_netlink_socket, + read_netlink_socket, + read_rta_oper_state, + unpack_rta_attr, + wait_for_media_disconnect_connect, + wait_for_nic_attach_event, + wait_for_nic_detach_event, +) +from tests.unittests.helpers import CiTestCase, mock def int_to_bytes(i): - '''convert integer to binary: eg: 1 to \x01''' - hex_value = '{0:x}'.format(i) - hex_value = '0' * (len(hex_value) % 2) + hex_value - return codecs.decode(hex_value, 'hex_codec') + """convert integer to binary: eg: 1 to \x01""" + hex_value = "{0:x}".format(i) + hex_value = "0" * (len(hex_value) % 2) + hex_value + return codecs.decode(hex_value, "hex_codec") class TestCreateBoundNetlinkSocket(CiTestCase): - - @mock.patch('cloudinit.sources.helpers.netlink.socket.socket') + @mock.patch("cloudinit.sources.helpers.netlink.socket.socket") def test_socket_error_on_create(self, m_socket): - '''create_bound_netlink_socket catches socket creation exception''' + """create_bound_netlink_socket catches socket creation exception""" """NetlinkCreateSocketError is raised when socket creation errors.""" m_socket.side_effect = socket.error("Fake socket failure") with self.assertRaises(NetlinkCreateSocketError) as ctx_mgr: create_bound_netlink_socket() self.assertEqual( - 'Exception during netlink socket create: Fake socket failure', - str(ctx_mgr.exception)) + "Exception during netlink socket create: Fake socket failure", + str(ctx_mgr.exception), + ) class TestReadNetlinkSocket(CiTestCase): - - @mock.patch('cloudinit.sources.helpers.netlink.socket.socket') - @mock.patch('cloudinit.sources.helpers.netlink.select.select') + @mock.patch("cloudinit.sources.helpers.netlink.socket.socket") + @mock.patch("cloudinit.sources.helpers.netlink.select.select") def test_read_netlink_socket(self, m_select, m_socket): - '''read_netlink_socket able to receive data''' - data = 'netlinktest' + """read_netlink_socket able to receive data""" + data = "netlinktest" m_select.return_value = [m_socket], None, None m_socket.recv.return_value = data recv_data = read_netlink_socket(m_socket, 2) @@ -52,10 +68,10 @@ class TestReadNetlinkSocket(CiTestCase): self.assertIsNotNone(recv_data) self.assertEqual(recv_data, data) - @mock.patch('cloudinit.sources.helpers.netlink.socket.socket') - @mock.patch('cloudinit.sources.helpers.netlink.select.select') + @mock.patch("cloudinit.sources.helpers.netlink.socket.socket") + @mock.patch("cloudinit.sources.helpers.netlink.select.select") def test_netlink_read_timeout(self, m_select, m_socket): - '''read_netlink_socket should timeout if nothing to read''' + """read_netlink_socket should timeout if nothing to read""" m_select.return_value = [], None, None data = read_netlink_socket(m_socket, 1) m_select.assert_called_with([m_socket], [], [], 1) @@ -63,35 +79,43 @@ class TestReadNetlinkSocket(CiTestCase): self.assertIsNone(data) def test_read_invalid_socket(self): - '''read_netlink_socket raises assert error if socket is invalid''' + """read_netlink_socket raises assert error if socket is invalid""" socket = None with self.assertRaises(AssertionError) as context: read_netlink_socket(socket, 1) - self.assertTrue('netlink socket is none' in str(context.exception)) + self.assertTrue("netlink socket is none" in str(context.exception)) class TestParseNetlinkMessage(CiTestCase): - def test_read_rta_oper_state(self): - '''read_rta_oper_state could parse netlink message and extract data''' + """read_rta_oper_state could parse netlink message and extract data""" ifname = "eth0" bytes = ifname.encode("utf-8") buf = bytearray(48) - struct.pack_into("HH4sHHc", buf, RTATTR_START_OFFSET, 8, 3, bytes, 5, - 16, int_to_bytes(OPER_DOWN)) + struct.pack_into( + "HH4sHHc", + buf, + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(OPER_DOWN), + ) interface_state = read_rta_oper_state(buf) self.assertEqual(interface_state.ifname, ifname) self.assertEqual(interface_state.operstate, OPER_DOWN) def test_read_none_data(self): - '''read_rta_oper_state raises assert error if data is none''' + """read_rta_oper_state raises assert error if data is none""" data = None with self.assertRaises(AssertionError) as context: read_rta_oper_state(data) - self.assertEqual('data is none', str(context.exception)) + self.assertEqual("data is none", str(context.exception)) def test_read_invalid_rta_operstate_none(self): - '''read_rta_oper_state returns none if operstate is none''' + """read_rta_oper_state returns none if operstate is none""" ifname = "eth0" buf = bytearray(40) bytes = ifname.encode("utf-8") @@ -100,65 +124,84 @@ class TestParseNetlinkMessage(CiTestCase): self.assertIsNone(interface_state) def test_read_invalid_rta_ifname_none(self): - '''read_rta_oper_state returns none if ifname is none''' + """read_rta_oper_state returns none if ifname is none""" buf = bytearray(40) - struct.pack_into("HHc", buf, RTATTR_START_OFFSET, 5, 16, - int_to_bytes(OPER_DOWN)) + struct.pack_into( + "HHc", buf, RTATTR_START_OFFSET, 5, 16, int_to_bytes(OPER_DOWN) + ) interface_state = read_rta_oper_state(buf) self.assertIsNone(interface_state) def test_read_invalid_data_len(self): - '''raise assert error if data size is smaller than required size''' + """raise assert error if data size is smaller than required size""" buf = bytearray(32) with self.assertRaises(AssertionError) as context: read_rta_oper_state(buf) - self.assertTrue('length of data is smaller than RTATTR_START_OFFSET' in - str(context.exception)) + self.assertTrue( + "length of data is smaller than RTATTR_START_OFFSET" + in str(context.exception) + ) def test_unpack_rta_attr_none_data(self): - '''unpack_rta_attr raises assert error if data is none''' + """unpack_rta_attr raises assert error if data is none""" data = None with self.assertRaises(AssertionError) as context: unpack_rta_attr(data, RTATTR_START_OFFSET) - self.assertTrue('data is none' in str(context.exception)) + self.assertTrue("data is none" in str(context.exception)) def test_unpack_rta_attr_invalid_offset(self): - '''unpack_rta_attr raises assert error if offset is invalid''' + """unpack_rta_attr raises assert error if offset is invalid""" data = bytearray(48) with self.assertRaises(AssertionError) as context: unpack_rta_attr(data, "offset") - self.assertTrue('offset is not integer' in str(context.exception)) + self.assertTrue("offset is not integer" in str(context.exception)) with self.assertRaises(AssertionError) as context: unpack_rta_attr(data, 31) - self.assertTrue('rta offset is less than expected length' in - str(context.exception)) + self.assertTrue( + "rta offset is less than expected length" in str(context.exception) + ) -@mock.patch('cloudinit.sources.helpers.netlink.socket.socket') -@mock.patch('cloudinit.sources.helpers.netlink.read_netlink_socket') +@mock.patch("cloudinit.sources.helpers.netlink.socket.socket") +@mock.patch("cloudinit.sources.helpers.netlink.read_netlink_socket") class TestNicAttachDetach(CiTestCase): with_logs = True def _media_switch_data(self, ifname, msg_type, operstate): - '''construct netlink data with specified fields''' + """construct netlink data with specified fields""" if ifname and operstate is not None: data = bytearray(48) bytes = ifname.encode("utf-8") - struct.pack_into("HH4sHHc", data, RTATTR_START_OFFSET, 8, 3, - bytes, 5, 16, int_to_bytes(operstate)) + struct.pack_into( + "HH4sHHc", + data, + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(operstate), + ) elif ifname: data = bytearray(40) bytes = ifname.encode("utf-8") struct.pack_into("HH4s", data, RTATTR_START_OFFSET, 8, 3, bytes) elif operstate: data = bytearray(40) - struct.pack_into("HHc", data, RTATTR_START_OFFSET, 5, 16, - int_to_bytes(operstate)) + struct.pack_into( + "HHc", + data, + RTATTR_START_OFFSET, + 5, + 16, + int_to_bytes(operstate), + ) struct.pack_into("=LHHLL", data, 0, len(data), msg_type, 0, 0, 0) return data def test_nic_attached_oper_down(self, m_read_netlink_socket, m_socket): - '''Test for a new nic attached''' + """Test for a new nic attached""" ifname = "eth0" data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) m_read_netlink_socket.side_effect = [data_op_down] @@ -167,7 +210,7 @@ class TestNicAttachDetach(CiTestCase): self.assertEqual(ifname, ifread) def test_nic_attached_oper_up(self, m_read_netlink_socket, m_socket): - '''Test for a new nic attached''' + """Test for a new nic attached""" ifname = "eth0" data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) m_read_netlink_socket.side_effect = [data_op_up] @@ -176,7 +219,7 @@ class TestNicAttachDetach(CiTestCase): self.assertEqual(ifname, ifread) def test_nic_attach_ignore_existing(self, m_read_netlink_socket, m_socket): - '''Test that we read only the interfaces we are interested in.''' + """Test that we read only the interfaces we are interested in.""" data_eth0 = self._media_switch_data("eth0", RTM_NEWLINK, OPER_DOWN) data_eth1 = self._media_switch_data("eth1", RTM_NEWLINK, OPER_DOWN) m_read_netlink_socket.side_effect = [data_eth0, data_eth1] @@ -185,7 +228,7 @@ class TestNicAttachDetach(CiTestCase): self.assertEqual("eth1", ifread) def test_nic_attach_read_first(self, m_read_netlink_socket, m_socket): - '''Test that we read only the interfaces we are interested in.''' + """Test that we read only the interfaces we are interested in.""" data_eth0 = self._media_switch_data("eth0", RTM_NEWLINK, OPER_DOWN) data_eth1 = self._media_switch_data("eth1", RTM_NEWLINK, OPER_DOWN) m_read_netlink_socket.side_effect = [data_eth0, data_eth1] @@ -194,7 +237,7 @@ class TestNicAttachDetach(CiTestCase): self.assertEqual("eth0", ifread) def test_nic_detached(self, m_read_netlink_socket, m_socket): - '''Test for an existing nic detached''' + """Test for an existing nic detached""" ifname = "eth0" data_op_down = self._media_switch_data(ifname, RTM_DELLINK, OPER_DOWN) m_read_netlink_socket.side_effect = [data_op_down] @@ -203,32 +246,46 @@ class TestNicAttachDetach(CiTestCase): self.assertEqual(ifname, ifread) -@mock.patch('cloudinit.sources.helpers.netlink.socket.socket') -@mock.patch('cloudinit.sources.helpers.netlink.read_netlink_socket') +@mock.patch("cloudinit.sources.helpers.netlink.socket.socket") +@mock.patch("cloudinit.sources.helpers.netlink.read_netlink_socket") class TestWaitForMediaDisconnectConnect(CiTestCase): with_logs = True def _media_switch_data(self, ifname, msg_type, operstate): - '''construct netlink data with specified fields''' + """construct netlink data with specified fields""" if ifname and operstate is not None: data = bytearray(48) bytes = ifname.encode("utf-8") - struct.pack_into("HH4sHHc", data, RTATTR_START_OFFSET, 8, 3, - bytes, 5, 16, int_to_bytes(operstate)) + struct.pack_into( + "HH4sHHc", + data, + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(operstate), + ) elif ifname: data = bytearray(40) bytes = ifname.encode("utf-8") struct.pack_into("HH4s", data, RTATTR_START_OFFSET, 8, 3, bytes) elif operstate: data = bytearray(40) - struct.pack_into("HHc", data, RTATTR_START_OFFSET, 5, 16, - int_to_bytes(operstate)) + struct.pack_into( + "HHc", + data, + RTATTR_START_OFFSET, + 5, + 16, + int_to_bytes(operstate), + ) struct.pack_into("=LHHLL", data, 0, len(data), msg_type, 0, 0, 0) return data - def test_media_down_up_scenario(self, m_read_netlink_socket, - m_socket): - '''Test for media down up sequence for required interface name''' + def test_media_down_up_scenario(self, m_read_netlink_socket, m_socket): + """Test for media down up sequence for required interface name""" ifname = "eth0" # construct data for Oper State down data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) @@ -238,15 +295,16 @@ class TestWaitForMediaDisconnectConnect(CiTestCase): wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 2) - def test_wait_for_media_switch_diff_interface(self, m_read_netlink_socket, - m_socket): - '''wait_for_media_disconnect_connect ignores unexpected interfaces. + def test_wait_for_media_switch_diff_interface( + self, m_read_netlink_socket, m_socket + ): + """wait_for_media_disconnect_connect ignores unexpected interfaces. The first two messages are for other interfaces and last two are for expected interface. So the function exit only after receiving last 2 messages and therefore the call count for m_read_netlink_socket has to be 4 - ''' + """ other_ifname = "eth1" expected_ifname = "eth0" data_op_down_eth1 = self._media_switch_data( @@ -259,51 +317,50 @@ class TestWaitForMediaDisconnectConnect(CiTestCase): expected_ifname, RTM_NEWLINK, OPER_DOWN ) data_op_up_eth0 = self._media_switch_data( - expected_ifname, RTM_NEWLINK, OPER_UP) + expected_ifname, RTM_NEWLINK, OPER_UP + ) m_read_netlink_socket.side_effect = [ data_op_down_eth1, data_op_up_eth1, data_op_down_eth0, - data_op_up_eth0 + data_op_up_eth0, ] wait_for_media_disconnect_connect(m_socket, expected_ifname) - self.assertIn('Ignored netlink event on interface %s' % other_ifname, - self.logs.getvalue()) + self.assertIn( + "Ignored netlink event on interface %s" % other_ifname, + self.logs.getvalue(), + ) self.assertEqual(m_read_netlink_socket.call_count, 4) def test_invalid_msgtype_getlink(self, m_read_netlink_socket, m_socket): - '''wait_for_media_disconnect_connect ignores GETLINK events. + """wait_for_media_disconnect_connect ignores GETLINK events. The first two messages are for oper down and up for RTM_GETLINK type which netlink module will ignore. The last 2 messages are RTM_NEWLINK with oper state down and up messages. Therefore the call count for m_read_netlink_socket has to be 4 ignoring first 2 messages of RTM_GETLINK - ''' + """ ifname = "eth0" data_getlink_down = self._media_switch_data( ifname, RTM_GETLINK, OPER_DOWN ) - data_getlink_up = self._media_switch_data( - ifname, RTM_GETLINK, OPER_UP - ) + data_getlink_up = self._media_switch_data(ifname, RTM_GETLINK, OPER_UP) data_newlink_down = self._media_switch_data( ifname, RTM_NEWLINK, OPER_DOWN ) - data_newlink_up = self._media_switch_data( - ifname, RTM_NEWLINK, OPER_UP - ) + data_newlink_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) m_read_netlink_socket.side_effect = [ data_getlink_down, data_getlink_up, data_newlink_down, - data_newlink_up + data_newlink_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 4) def test_invalid_msgtype_setlink(self, m_read_netlink_socket, m_socket): - '''wait_for_media_disconnect_connect ignores SETLINK events. + """wait_for_media_disconnect_connect ignores SETLINK events. The first two messages are for oper down and up for RTM_GETLINK type which it will ignore. 3rd and 4th messages are RTM_NEWLINK with down @@ -311,34 +368,31 @@ class TestWaitForMediaDisconnectConnect(CiTestCase): sees down->up scenario. So the call count for m_read_netlink_socket has to be 4 ignoring first 2 messages of RTM_GETLINK and last 2 messages of RTM_NEWLINK - ''' + """ ifname = "eth0" data_setlink_down = self._media_switch_data( ifname, RTM_SETLINK, OPER_DOWN ) - data_setlink_up = self._media_switch_data( - ifname, RTM_SETLINK, OPER_UP - ) + data_setlink_up = self._media_switch_data(ifname, RTM_SETLINK, OPER_UP) data_newlink_down = self._media_switch_data( ifname, RTM_NEWLINK, OPER_DOWN ) - data_newlink_up = self._media_switch_data( - ifname, RTM_NEWLINK, OPER_UP - ) + data_newlink_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) m_read_netlink_socket.side_effect = [ data_setlink_down, data_setlink_up, data_newlink_down, data_newlink_up, data_newlink_down, - data_newlink_up + data_newlink_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 4) - def test_netlink_invalid_switch_scenario(self, m_read_netlink_socket, - m_socket): - '''returns only if it receives UP event after a DOWN event''' + def test_netlink_invalid_switch_scenario( + self, m_read_netlink_socket, m_socket + ): + """returns only if it receives UP event after a DOWN event""" ifname = "eth0" data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) @@ -358,114 +412,153 @@ class TestWaitForMediaDisconnectConnect(CiTestCase): ifname, RTM_NEWLINK, OPER_UNKNOWN ) m_read_netlink_socket.side_effect = [ - data_op_up, data_op_up, - data_op_dormant, data_op_up, - data_op_notpresent, data_op_up, - data_op_lowerdown, data_op_up, - data_op_testing, data_op_up, - data_op_unknown, data_op_up, - data_op_down, data_op_up + data_op_up, + data_op_up, + data_op_dormant, + data_op_up, + data_op_notpresent, + data_op_up, + data_op_lowerdown, + data_op_up, + data_op_testing, + data_op_up, + data_op_unknown, + data_op_up, + data_op_down, + data_op_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 14) - def test_netlink_valid_inbetween_transitions(self, m_read_netlink_socket, - m_socket): - '''wait_for_media_disconnect_connect handles in between transitions''' + def test_netlink_valid_inbetween_transitions( + self, m_read_netlink_socket, m_socket + ): + """wait_for_media_disconnect_connect handles in between transitions""" ifname = "eth0" data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) data_op_dormant = self._media_switch_data( - ifname, RTM_NEWLINK, OPER_DORMANT) + ifname, RTM_NEWLINK, OPER_DORMANT + ) data_op_unknown = self._media_switch_data( - ifname, RTM_NEWLINK, OPER_UNKNOWN) + ifname, RTM_NEWLINK, OPER_UNKNOWN + ) m_read_netlink_socket.side_effect = [ - data_op_down, data_op_dormant, - data_op_unknown, data_op_up + data_op_down, + data_op_dormant, + data_op_unknown, + data_op_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 4) def test_netlink_invalid_operstate(self, m_read_netlink_socket, m_socket): - '''wait_for_media_disconnect_connect should handle invalid operstates. + """wait_for_media_disconnect_connect should handle invalid operstates. The function should not fail and return even if it receives invalid operstates. It always should wait for down up sequence. - ''' + """ ifname = "eth0" data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) data_op_invalid = self._media_switch_data(ifname, RTM_NEWLINK, 7) m_read_netlink_socket.side_effect = [ - data_op_invalid, data_op_up, - data_op_down, data_op_invalid, - data_op_up + data_op_invalid, + data_op_up, + data_op_down, + data_op_invalid, + data_op_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 5) def test_wait_invalid_socket(self, m_read_netlink_socket, m_socket): - '''wait_for_media_disconnect_connect handle none netlink socket.''' + """wait_for_media_disconnect_connect handle none netlink socket.""" socket = None ifname = "eth0" with self.assertRaises(AssertionError) as context: wait_for_media_disconnect_connect(socket, ifname) - self.assertTrue('netlink socket is none' in str(context.exception)) + self.assertTrue("netlink socket is none" in str(context.exception)) def test_wait_invalid_ifname(self, m_read_netlink_socket, m_socket): - '''wait_for_media_disconnect_connect handle none interface name''' + """wait_for_media_disconnect_connect handle none interface name""" ifname = None with self.assertRaises(AssertionError) as context: wait_for_media_disconnect_connect(m_socket, ifname) - self.assertTrue('interface name is none' in str(context.exception)) + self.assertTrue("interface name is none" in str(context.exception)) ifname = "" with self.assertRaises(AssertionError) as context: wait_for_media_disconnect_connect(m_socket, ifname) - self.assertTrue('interface name cannot be empty' in - str(context.exception)) + self.assertTrue( + "interface name cannot be empty" in str(context.exception) + ) def test_wait_invalid_rta_attr(self, m_read_netlink_socket, m_socket): - ''' wait_for_media_disconnect_connect handles invalid rta data''' + """wait_for_media_disconnect_connect handles invalid rta data""" ifname = "eth0" data_invalid1 = self._media_switch_data(None, RTM_NEWLINK, OPER_DOWN) data_invalid2 = self._media_switch_data(ifname, RTM_NEWLINK, None) data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN) data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP) m_read_netlink_socket.side_effect = [ - data_invalid1, data_invalid2, data_op_down, data_op_up + data_invalid1, + data_invalid2, + data_op_down, + data_op_up, ] wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 4) def test_read_multiple_netlink_msgs(self, m_read_netlink_socket, m_socket): - '''Read multiple messages in single receive call''' + """Read multiple messages in single receive call""" ifname = "eth0" bytes = ifname.encode("utf-8") data = bytearray(96) struct.pack_into("=LHHLL", data, 0, 48, RTM_NEWLINK, 0, 0, 0) struct.pack_into( - "HH4sHHc", data, RTATTR_START_OFFSET, 8, 3, - bytes, 5, 16, int_to_bytes(OPER_DOWN) + "HH4sHHc", + data, + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(OPER_DOWN), ) struct.pack_into("=LHHLL", data, 48, 48, RTM_NEWLINK, 0, 0, 0) struct.pack_into( - "HH4sHHc", data, 48 + RTATTR_START_OFFSET, 8, - 3, bytes, 5, 16, int_to_bytes(OPER_UP) + "HH4sHHc", + data, + 48 + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(OPER_UP), ) m_read_netlink_socket.return_value = data wait_for_media_disconnect_connect(m_socket, ifname) self.assertEqual(m_read_netlink_socket.call_count, 1) def test_read_partial_netlink_msgs(self, m_read_netlink_socket, m_socket): - '''Read partial messages in receive call''' + """Read partial messages in receive call""" ifname = "eth0" bytes = ifname.encode("utf-8") data1 = bytearray(112) data2 = bytearray(32) struct.pack_into("=LHHLL", data1, 0, 48, RTM_NEWLINK, 0, 0, 0) struct.pack_into( - "HH4sHHc", data1, RTATTR_START_OFFSET, 8, 3, - bytes, 5, 16, int_to_bytes(OPER_DOWN) + "HH4sHHc", + data1, + RTATTR_START_OFFSET, + 8, + 3, + bytes, + 5, + 16, + int_to_bytes(OPER_DOWN), ) struct.pack_into("=LHHLL", data1, 48, 48, RTM_NEWLINK, 0, 0, 0) struct.pack_into( |