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#!/usr/bin/env python

"""

This module tests :meth:`can.interface.virtual`.

"""

import unittest

from can import Bus, Message

EXAMPLE_MSG1 = Message(timestamp=1639739471.5565314, arbitration_id=0x481, data=b"\x01")

class TestMessageFiltering(unittest.TestCase):

def setUp(self):

self.node1 = Bus("test", interface="virtual", preserve_timestamps=True)

self.node2 = Bus("test", interface="virtual")

def tearDown(self):

self.node1.shutdown()

self.node2.shutdown()

def test_sendmsg(self):

self.node2.send(EXAMPLE_MSG1)

r = self.node1.recv(0.1)

assert r.timestamp != EXAMPLE_MSG1.timestamp

assert r.arbitration_id == EXAMPLE_MSG1.arbitration_id

assert r.data == EXAMPLE_MSG1.data

def test_sendmsg_preserve_timestamp(self):

self.node1.send(EXAMPLE_MSG1)

r = self.node2.recv(0.1)

assert r.timestamp == EXAMPLE_MSG1.timestamp

assert r.arbitration_id == EXAMPLE_MSG1.arbitration_id

assert r.data == EXAMPLE_MSG1.data

if __name__ == "__main__":

unittest.main()