68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
#!/usr/bin/env python
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#
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# This file is part of pySerial - Cross platform serial port support for Python
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# (C) 2015 Chris Liechti <cliechti@gmx.net>
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#
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# SPDX-License-Identifier: BSD-3-Clause
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"""\
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Test RS485 related functionality.
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"""
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import unittest
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import serial
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import serial.rs485
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# on which port should the tests be performed:
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PORT = 'loop://'
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class Test_RS485_settings(unittest.TestCase):
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"""Test RS485 related functionality"""
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def setUp(self):
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# create a closed serial port
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self.s = serial.serial_for_url(PORT, do_not_open=True)
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def tearDown(self):
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self.s.close()
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def test_enable_RS485(self):
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# XXX open() port - but will result in fail for most HW...
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#~ self.s.open()
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self.assertEqual(self.s._rs485_mode, None, 'RS485 is disabled by default')
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self.assertEqual(self.s.rs485_mode, None, 'RS485 is disabled by default')
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self.s.rs485_mode = serial.rs485.RS485Settings()
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self.assertTrue(self.s._rs485_mode is not None, 'RS485 is enabled')
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self.assertTrue(self.s.rs485_mode is not None, 'RS485 is enabled')
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self.s.rs485_mode = None
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self.assertEqual(self.s._rs485_mode, None, 'RS485 is disabled again')
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self.assertEqual(self.s.rs485_mode, None, 'RS485 is disabled again')
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class Test_RS485_class(unittest.TestCase):
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"""Test RS485 class"""
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def setUp(self):
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if not isinstance(serial.serial_for_url(PORT), serial.Serial):
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raise unittest.SkipTest("RS485 test only compatible with real serial port")
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self.s = serial.rs485.RS485(PORT, timeout=1)
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def tearDown(self):
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self.s.close()
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def test_RS485_class(self):
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self.s.rs485_mode = serial.rs485.RS485Settings()
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self.s.write(b'hello')
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self.assertEqual(self.s.read(5), b'hello')
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if __name__ == '__main__':
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import sys
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sys.stdout.write(__doc__)
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if len(sys.argv) > 1:
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PORT = sys.argv[1]
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sys.stdout.write("Testing port: {!r}\n".format(PORT))
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sys.argv[1:] = ['-v']
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# When this module is executed from the command-line, it runs all its tests
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unittest.main()
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