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#!/usr/bin/env python

"""

This module tests :meth:`can.BusABC._matches_filters`.

"""

import unittest

from can import Bus, Message

from .data.example_data import TEST_ALL_MESSAGES

EXAMPLE_MSG = Message(arbitration_id=0x123, is_extended_id=True)

HIGHEST_MSG = Message(arbitration_id=0x1FFFFFFF, is_extended_id=True)

MATCH_EXAMPLE = [{"can_id": 0x123, "can_mask": 0x1FFFFFFF, "extended": True}]

MATCH_ONLY_HIGHEST = [{"can_id": 0xFFFFFFFF, "can_mask": 0x1FFFFFFF, "extended": True}]

class TestMessageFiltering(unittest.TestCase):

def setUp(self):

self.bus = Bus(interface="virtual", channel="testy")

def tearDown(self):

self.bus.shutdown()

def test_match_all(self):

# explicitly

self.bus.set_filters()

self.assertTrue(self.bus._matches_filters(EXAMPLE_MSG))

# implicitly

self.bus.set_filters(None)

self.assertTrue(self.bus._matches_filters(EXAMPLE_MSG))

def test_match_filters_is_empty(self):

self.bus.set_filters([])

for msg in TEST_ALL_MESSAGES:

self.assertTrue(self.bus._matches_filters(msg))

def test_match_example_message(self):

self.bus.set_filters(MATCH_EXAMPLE)

self.assertTrue(self.bus._matches_filters(EXAMPLE_MSG))

self.assertFalse(self.bus._matches_filters(HIGHEST_MSG))

self.bus.set_filters(MATCH_ONLY_HIGHEST)

self.assertFalse(self.bus._matches_filters(EXAMPLE_MSG))

self.assertTrue(self.bus._matches_filters(HIGHEST_MSG))

if __name__ == "__main__":

unittest.main()