def test_monitorServices_handles_scan_failure(self):
clock = Clock()
service = ActiveDiscoveryService(clock)
self.patch(service, "refreshDiscoveryConfig")
scanIfNeeded = self.patch(service, "scanIfNeeded")
scanIfNeeded.side_effect = Exception
# Pretend the call to refreshDiscoveryConfig enabled discovery,
# as expected.
service.discovery_enabled = True
with TwistedLoggerFixture() as logger:
service.run()
self.assertThat(
logger.output, DocTestMatches(dedent("""\
...: periodic scan failed.
Traceback (most recent call last):
...""")))
def test_scanIfNeeded_logs_success(self):
service = ActiveDiscoveryService(Clock())
try_lock_and_scan = self.patch(service, "try_lock_and_scan")
try_lock_and_scan.return_value = "happy"
service.discovery_enabled = True
service.discovery_last_scan = 0
service.discovery_interval = 1
service.startService()
with TwistedLoggerFixture() as logger:
yield service.run()
self.assertThat(logger.output,
DocTestMatches("...Active network discovery: happy"))