#!/usr/bin/env python

""" """

import logging

import unittest

import can

logging.getLogger(__file__).setLevel(logging.DEBUG)

class ZeroDLCTest(unittest.TestCase):

def test_recv_non_zero_dlc(self):

with (

can.interface.Bus(interface="virtual") as bus_send,

can.interface.Bus(interface="virtual") as bus_recv,

):

data = [0, 1, 2, 3, 4, 5, 6, 7]

msg_send = can.Message(

is_extended_id=False, arbitration_id=0x100, data=data

)

bus_send.send(msg_send)

msg_recv = bus_recv.recv()

# Receiving a frame with data should evaluate msg_recv to True

self.assertTrue(msg_recv)

def test_recv_none(self):

with can.interface.Bus(interface="virtual") as bus_recv:

msg_recv = bus_recv.recv(timeout=0)

# Receiving nothing should evaluate msg_recv to False

self.assertFalse(msg_recv)

def test_recv_zero_dlc(self):

with (

can.interface.Bus(interface="virtual") as bus_send,

can.interface.Bus(interface="virtual") as bus_recv,

):

msg_send = can.Message(is_extended_id=False, arbitration_id=0x100, data=[])

bus_send.send(msg_send)

msg_recv = bus_recv.recv()

# Receiving a frame without data (dlc == 0) should evaluate msg_recv to True

self.assertTrue(msg_recv)

if __name__ == "__main__":

unittest.main()