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#!/usr/bin/env python

import unittest

import can

from can.interfaces.socketcand import socketcand

class TestConvertAsciiMessageToCanMessage(unittest.TestCase):

def test_valid_frame_message(self):

# Example: < frame 123 1680000000.0 01020304 >

ascii_msg = "< frame 123 1680000000.0 01020304 >"

msg = socketcand.convert_ascii_message_to_can_message(ascii_msg)

self.assertIsInstance(msg, can.Message)

self.assertEqual(msg.arbitration_id, 0x123)

self.assertEqual(msg.timestamp, 1680000000.0)

self.assertEqual(msg.data, bytearray([1, 2, 3, 4]))

self.assertEqual(msg.dlc, 4)

self.assertFalse(msg.is_extended_id)

self.assertTrue(msg.is_rx)

def test_valid_error_message(self):

# Example: < error 1ABCDEF0 1680000001.0 >

ascii_msg = "< error 1ABCDEF0 1680000001.0 >"

msg = socketcand.convert_ascii_message_to_can_message(ascii_msg)

self.assertIsInstance(msg, can.Message)

self.assertEqual(msg.arbitration_id, 0x1ABCDEF0)

self.assertEqual(msg.timestamp, 1680000001.0)

self.assertEqual(msg.data, bytearray([0]))

self.assertEqual(msg.dlc, 1)

self.assertTrue(msg.is_extended_id)

self.assertTrue(msg.is_error_frame)

self.assertTrue(msg.is_rx)

def test_invalid_message(self):

ascii_msg = "< unknown 123 0.0 >"

msg = socketcand.convert_ascii_message_to_can_message(ascii_msg)

self.assertIsNone(msg)

def test_missing_ending_character(self):

ascii_msg = "< frame 123 1680000000.0 01020304"

msg = socketcand.convert_ascii_message_to_can_message(ascii_msg)

self.assertIsNone(msg)

if __name__ == "__main__":

unittest.main()