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#!/usr/bin/env python
#
# This file is part of pySerial - Cross platform serial port support for Python
# (C) 2016 Chris Liechti <cliechti@gmx.net>
#
# SPDX-License-Identifier: BSD-3-Clause
"""
Test Timeout helper class.
"""
import sys
import unittest
import time
from serial import serialutil
class TestTimeoutClass(unittest.TestCase):
"""Test the Timeout class"""
def test_simple_timeout(self):
"""Test simple timeout"""
t = serialutil.Timeout(2)
self.assertFalse(t.expired())
self.assertTrue(t.time_left() > 0)
time.sleep(2.1)
self.assertTrue(t.expired())
self.assertEqual(t.time_left(), 0)
def test_non_blocking(self):
"""Test nonblocking case (0)"""
t = serialutil.Timeout(0)
self.assertTrue(t.is_non_blocking)
self.assertFalse(t.is_infinite)
self.assertTrue(t.expired())
def test_blocking(self):
"""Test no timeout (None)"""
t = serialutil.Timeout(None)
self.assertFalse(t.is_non_blocking)
self.assertTrue(t.is_infinite)
#~ self.assertFalse(t.expired())
def test_changing_clock(self):
"""Test recovery from chaning clock"""
class T(serialutil.Timeout):
def TIME(self):
return test_time
test_time = 1000
t = T(10)
self.assertEqual(t.target_time, 1010)
self.assertFalse(t.expired())
self.assertTrue(t.time_left() > 0)
test_time = 100 # clock jumps way back
self.assertTrue(t.time_left() > 0)
self.assertTrue(t.time_left() <= 10)
self.assertEqual(t.target_time, 110)
test_time = 10000 # jump way forward
self.assertEqual(t.time_left(), 0) # if will expire immediately
if __name__ == '__main__':
sys.stdout.write(__doc__)
if len(sys.argv) > 1:
PORT = sys.argv[1]
sys.argv[1:] = ['-v']
# When this module is executed from the command-line, it runs all its tests
unittest.main()
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