def testUSBPollerThreadException(self):
"""
USBPollerThread exception handling.
"""
class FakeEventPoll(PollDetector):
# pylint: disable=method-hidden
def poll(self, *args, **kw):
self.poll = super(FakeEventPoll, self).poll
return ['dummy']
# pylint: enable=method-hidden
with USBContext() as context:
def fakeHandleEventsLocked():
raise usb1.USBError(0)
context.handleEventsLocked = fakeHandleEventsLocked
exception_event = threading.Event()
exception_list = []
def exceptionHandler(exc):
exception_list.append(exc)
exception_event.set()
try:
poller = usb1.USBPollerThread(context, FakeEventPoll(),
exceptionHandler)
except OSError:
raise unittest.SkipTest(
'libusb without file descriptor events')
poller.start()
exception_event.wait(1)
self.assertTrue(exception_list, exception_list)
self.assertTrue(poller.is_alive())
def __init__(self, scope_id=0):
self.device = None
self.device_handle = None
self.context = usb1.USBContext()
self.usb_poller = usb1.USBPollerThread(self.context, select.poll())
# TODO: Should the poller be started on initialization?
self.usb_poller.start()
self.is_device_firmware_present = False
self.supports_single_channel = False
self.is_iso = False
self.packetsize = None
self.num_channels = 2
self.scope_id = scope_id
def testUSBPollerThreadExit(self):
"""
USBPollerThread must exit by itself when context is destroyed.
"""
with USBContext() as context:
poll_detector = PollDetector()
try:
poller = usb1.USBPollerThread(context, poll_detector)
except OSError:
raise unittest.SkipTest('libusb without file descriptor events')
poller.start()
poll_detector.wait(1)
poller.join(1)
self.assertFalse(poller.is_alive())
