def METHOD_NAME():
    vm = FakeVM()
    dispatch = FakeDispatch()
    mon = thinp.VolumeMonitor(vm, vm.log, dispatch=dispatch)
    vda = make_drive(vm.log, index=0, iface='virtio')
    vm.drives.append(vda)
    mon.on_block_threshold("vda", vda.path, 512 * MiB, 10 * MiB)
    assert vda.threshold_state == BLOCK_THRESHOLD.UNSET
    assert len(dispatch.calls) == 0