def testDiskIOCounters(self, io_mock):
Counters = collections.namedtuple('sdiskio', ['read_count', 'write_count',
'read_bytes', 'write_bytes',
'read_time', 'write_time'])
io_mock.return_value = Counters(0, 1, 2, 3, 4, 5)
hostinfo = HostInfo(MagicMock())
disk_counters = hostinfo.get_combined_disk_io_counters()
self.assertEqual(disk_counters['read_count'], 0)
self.assertEqual(disk_counters['write_count'], 1)
self.assertEqual(disk_counters['read_bytes'], 2)
self.assertEqual(disk_counters['write_bytes'], 3)
self.assertEqual(disk_counters['read_time'], 4)
self.assertEqual(disk_counters['write_time'], 5)
