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zero_dlc_test.py

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#!/usr/bin/env python

# coding: utf-8

"""

"""

from time import sleep

import unittest

import logging

import can

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

class ZeroDLCTest(unittest.TestCase):

def test_recv_non_zero_dlc(self):

bus_send = can.interface.Bus(bustype="virtual")

bus_recv = can.interface.Bus(bustype="virtual")

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):

bus_recv = can.interface.Bus(bustype="virtual")

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):

bus_send = can.interface.Bus(bustype="virtual")

bus_recv = can.interface.Bus(bustype="virtual")

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()