"""

Unittest for ixxat interface.

Run only this test:

python setup.py test --addopts "--verbose -s test/test_interface_ixxat.py"

"""

import unittest

import can

class SoftwareTestCase(unittest.TestCase):

"""

Test cases that test the software only and do not rely on an existing/connected hardware.

"""

def setUp(self):

try:

bus = can.Bus(interface="ixxat", channel=0)

bus.shutdown()

except ImportError:

raise(unittest.SkipTest())

def tearDown(self):

pass

def test_bus_creation(self):

# channel must be >= 0

with self.assertRaises(ValueError):

bus = can.Bus(interface="ixxat", channel=-1)

# rxFifoSize must be > 0

with self.assertRaises(ValueError):

bus = can.Bus(interface="ixxat", channel=0, rxFifoSize=0)

# txFifoSize must be > 0

with self.assertRaises(ValueError):

bus = can.Bus(interface="ixxat", channel=0, txFifoSize=0)

class HardwareTestCase(unittest.TestCase):

"""

Test cases that rely on an existing/connected hardware.

"""

def setUp(self):

try:

bus = can.Bus(interface="ixxat", channel=0)

bus.shutdown()

except ImportError:

raise(unittest.SkipTest())

def tearDown(self):

pass

def test_bus_creation(self):

# non-existent channel -> use arbitrary high value

with self.assertRaises(can.CanInitializationError):

bus = can.Bus(interface="ixxat", channel=0xFFFF)

def test_send_after_shutdown(self):

bus = can.Bus(interface="ixxat", channel=0)

msg = can.Message(arbitration_id=0x3FF, dlc=0)

bus.shutdown()

with self.assertRaises(can.CanOperationError):

bus.send(msg)

if __name__ == '__main__':

unittest.main()