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#!/usr/bin/env python
import unittest
from ctypes import (
POINTER,
byref,
c_ubyte,
cast,
sizeof,
)
from unittest.mock import Mock
import can
from can.interfaces.neousys import neousys
class TestNeousysBus(unittest.TestCase):
def setUp(self) -> None:
can.interfaces.neousys.neousys.NEOUSYS_CANLIB = Mock()
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_RegisterReceived = Mock(
return_value=1
)
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_RegisterStatus = Mock(
return_value=1
)
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Setup = Mock(return_value=1)
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Start = Mock(return_value=1)
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Send = Mock(return_value=1)
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Stop = Mock(return_value=1)
self.bus = can.Bus(channel=0, interface="neousys")
def tearDown(self) -> None:
if self.bus:
self.bus.shutdown()
self.bus = None
def test_bus_creation(self) -> None:
self.assertIsInstance(self.bus, neousys.NeousysBus)
self.assertEqual(self.bus.protocol, can.CanProtocol.CAN_20)
neousys.NEOUSYS_CANLIB.CAN_Setup.assert_called()
neousys.NEOUSYS_CANLIB.CAN_Start.assert_called()
neousys.NEOUSYS_CANLIB.CAN_RegisterReceived.assert_called()
neousys.NEOUSYS_CANLIB.CAN_RegisterStatus.assert_called()
neousys.NEOUSYS_CANLIB.CAN_Send.assert_not_called()
neousys.NEOUSYS_CANLIB.CAN_Stop.assert_not_called()
CAN_Start_args = (
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Setup.call_args[0]
)
# sizeof struct should be 16
self.assertEqual(CAN_Start_args[0], 0)
self.assertEqual(CAN_Start_args[2], 16)
NeousysCanSetup_struct = cast(
CAN_Start_args[1], POINTER(neousys.NeousysCanSetup)
)
self.assertEqual(NeousysCanSetup_struct.contents.bitRate, 500000)
self.assertEqual(
NeousysCanSetup_struct.contents.recvConfig,
neousys.NEOUSYS_CAN_MSG_USE_ID_FILTER,
)
def test_bus_creation_bitrate(self) -> None:
self.bus = can.Bus(channel=0, interface="neousys", bitrate=200000)
self.assertIsInstance(self.bus, neousys.NeousysBus)
self.assertEqual(self.bus.protocol, can.CanProtocol.CAN_20)
CAN_Start_args = (
can.interfaces.neousys.neousys.NEOUSYS_CANLIB.CAN_Setup.call_args[0]
)
# sizeof struct should be 16
self.assertEqual(CAN_Start_args[0], 0)
self.assertEqual(CAN_Start_args[2], 16)
NeousysCanSetup_struct = cast(
CAN_Start_args[1], POINTER(neousys.NeousysCanSetup)
)
self.assertEqual(NeousysCanSetup_struct.contents.bitRate, 200000)
self.assertEqual(
NeousysCanSetup_struct.contents.recvConfig,
neousys.NEOUSYS_CAN_MSG_USE_ID_FILTER,
)
def test_receive(self) -> None:
recv_msg = self.bus.recv(timeout=0.05)
self.assertEqual(recv_msg, None)
msg_data = [0x01, 0x02, 0x03, 0x04, 0x05]
NeousysCanMsg_msg = neousys.NeousysCanMsg(
0x01, 0x00, 0x00, 0x05, (c_ubyte * 8)(*msg_data)
)
self.bus._neousys_recv_cb(byref(NeousysCanMsg_msg), sizeof(NeousysCanMsg_msg))
recv_msg = self.bus.recv(timeout=0.05)
self.assertEqual(recv_msg.dlc, 5)
self.assertSequenceEqual(recv_msg.data, msg_data)
def test_send(self) -> None:
msg = can.Message(
arbitration_id=0x01, data=[1, 2, 3, 4, 5, 6, 7, 8], is_extended_id=False
)
self.bus.send(msg)
neousys.NEOUSYS_CANLIB.CAN_Send.assert_called()
def test_shutdown(self) -> None:
self.bus.shutdown()
neousys.NEOUSYS_CANLIB.CAN_Stop.assert_called()
if __name__ == "__main__":
unittest.main()
|
