def test_get_samples_with_empty_stats(self):
self._mock_inspect_instance(virt_inspector.NoDataException())
mgr = manager.AgentManager(0, self.CONF)
pollster = instance_stats.PerfCPUCyclesPollster(self.CONF)
def all_samples():
return list(pollster.get_samples(mgr, {}, [self.instance]))
def _check_perf_events_cpu_cycles(expected_usage):
pollster = instance_stats.PerfCPUCyclesPollster(self.CONF)
samples = list(pollster.get_samples(mgr, cache, [self.instance]))
self.assertEqual(1, len(samples))
self.assertEqual(set(['perf.cpu.cycles']),
set([s.name for s in samples]))
self.assertEqual(expected_usage, samples[0].volume)