def test_drive_selection():
devs = DeviceSelection(paths=['/dev/sda'])
spec = DriveGroupSpec('node_name', data_devices=devs)
assert spec.data_devices.paths == ['/dev/sda']
with pytest.raises(DriveGroupValidationError, match='exclusive'):
DeviceSelection(paths=['/dev/sda'], rotates=False)
def test_drivegroup_pattern():
dg = DriveGroupSpec('node[1-3]', DeviceSelection())
assert dg.hosts(['node{}'.format(i)
for i in range(10)]) == ['node1', 'node2', 'node3']