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#!/usr/bin/env python
""" """
import asyncio
import logging
import os
import random
import tempfile
import unittest
import warnings
from os.path import dirname, join
import can
from .data.example_data import generate_message
logging.basicConfig(level=logging.DEBUG)
# makes the random number generator deterministic
random.seed(13339115)
class ListenerImportTest(unittest.TestCase):
def testClassesImportable(self):
self.assertTrue(hasattr(can, "Listener"))
self.assertTrue(hasattr(can, "BufferedReader"))
self.assertTrue(hasattr(can, "Notifier"))
self.assertTrue(hasattr(can, "Logger"))
self.assertTrue(hasattr(can, "ASCWriter"))
self.assertTrue(hasattr(can, "ASCReader"))
self.assertTrue(hasattr(can, "BLFReader"))
self.assertTrue(hasattr(can, "BLFWriter"))
self.assertTrue(hasattr(can, "CSVReader"))
self.assertTrue(hasattr(can, "CSVWriter"))
self.assertTrue(hasattr(can, "CanutilsLogWriter"))
self.assertTrue(hasattr(can, "CanutilsLogReader"))
self.assertTrue(hasattr(can, "SqliteReader"))
self.assertTrue(hasattr(can, "SqliteWriter"))
self.assertTrue(hasattr(can, "Printer"))
self.assertTrue(hasattr(can, "LogReader"))
self.assertTrue(hasattr(can, "MessageSync"))
class BusTest(unittest.TestCase):
def setUp(self):
# Save all can.rc defaults
self._can_rc = can.rc
can.rc = {"interface": "virtual"}
self.bus = can.interface.Bus()
def tearDown(self):
self.bus.shutdown()
# Restore the defaults
can.rc = self._can_rc
class ListenerTest(BusTest):
def testBasicListenerCanBeAddedToNotifier(self):
a_listener = can.Printer()
notifier = can.Notifier(self.bus, [a_listener], 0.1)
notifier.stop()
self.assertIn(a_listener, notifier.listeners)
def testAddListenerToNotifier(self):
a_listener = can.Printer()
notifier = can.Notifier(self.bus, [], 0.1)
notifier.stop()
self.assertNotIn(a_listener, notifier.listeners)
notifier.add_listener(a_listener)
self.assertIn(a_listener, notifier.listeners)
def testRemoveListenerFromNotifier(self):
a_listener = can.Printer()
notifier = can.Notifier(self.bus, [a_listener], 0.1)
notifier.stop()
self.assertIn(a_listener, notifier.listeners)
notifier.remove_listener(a_listener)
self.assertNotIn(a_listener, notifier.listeners)
def testPlayerTypeResolution(self):
def test_filetype_to_instance(extension, klass):
print(f"testing: {extension}")
try:
if extension == ".blf":
delete = False
file_handler = open(
join(dirname(__file__), "data", "test_CanMessage.blf")
)
else:
delete = True
file_handler = tempfile.NamedTemporaryFile(
suffix=extension, delete=False
)
with file_handler as my_file:
filename = my_file.name
with can.LogReader(filename) as reader:
self.assertIsInstance(reader, klass)
finally:
if delete:
os.remove(filename)
test_filetype_to_instance(".asc", can.ASCReader)
test_filetype_to_instance(".blf", can.BLFReader)
test_filetype_to_instance(".csv", can.CSVReader)
test_filetype_to_instance(".db", can.SqliteReader)
test_filetype_to_instance(".log", can.CanutilsLogReader)
def testPlayerTypeResolutionUnsupportedFileTypes(self):
for should_fail_with in ["", ".", ".some_unknown_extention_42"]:
with self.assertRaises(ValueError):
with can.LogReader(should_fail_with): # make sure we close it anyways
pass
def testLoggerTypeResolution(self):
def test_filetype_to_instance(extension, klass):
print(f"testing: {extension}")
try:
with tempfile.NamedTemporaryFile(
suffix=extension, delete=False
) as my_file:
filename = my_file.name
with can.Logger(filename) as writer:
self.assertIsInstance(writer, klass)
finally:
os.remove(filename)
test_filetype_to_instance(".asc", can.ASCWriter)
test_filetype_to_instance(".blf", can.BLFWriter)
test_filetype_to_instance(".csv", can.CSVWriter)
test_filetype_to_instance(".db", can.SqliteWriter)
test_filetype_to_instance(".log", can.CanutilsLogWriter)
test_filetype_to_instance(".txt", can.Printer)
with can.Logger(None) as logger:
self.assertIsInstance(logger, can.Printer)
def testLoggerTypeResolutionUnsupportedFileTypes(self):
for should_fail_with in ["", ".", ".some_unknown_extention_42"]:
with self.assertRaises(ValueError):
with can.Logger(should_fail_with): # make sure we close it anyways
pass
def testBufferedListenerReceives(self):
a_listener = can.BufferedReader()
a_listener(generate_message(0xDADADA))
a_listener(generate_message(0xDADADA))
self.assertIsNotNone(a_listener.get_message(0.1))
a_listener.stop()
self.assertIsNotNone(a_listener.get_message(0.1))
def test_deprecated_loop_arg(recwarn):
try:
loop = asyncio.get_running_loop()
except RuntimeError:
loop = asyncio.new_event_loop()
warnings.simplefilter("always")
can.AsyncBufferedReader(loop=loop)
assert len(recwarn) > 0
assert recwarn.pop(DeprecationWarning)
recwarn.clear()
# assert that no warning is shown when loop argument is not used
can.AsyncBufferedReader()
assert len(recwarn) == 0
if __name__ == "__main__":
unittest.main()
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