def METHOD_NAME(self, cache, helper, force=False):
    helper().get_size.return_value = 456
    now_val = isoparse('2021-01-01T00:00:00')
    with mock.patch("contentcuration.utils.nodes.timezone.now") as now:
        now.return_value = now_val
        size, stale = calculate_resource_size(self.node, force=force)
    self.assertEqual(456, size)
    self.assertFalse(stale)
    cache().set_size.assert_called_once_with(456)
    cache().set_modified.assert_called_once_with(now_val)