def METHOD_NAME(self):
    cfg = Configuration.default(
        region=dict(br=dict(children=["a"])),
        partitions=dict(a=dict(type="allen", struct_name="VAL")),
    )
    part = cfg.partitions.a
    vs = part.voxelset
    self.assertEqual(52314, len(vs), "VAL is that many voxels")
    self.assertEqual(52314 * 25**3, part.volume(), "VAL occupies this much space")
    self.assertTrue(
        np.allclose([(5975, 3550, 3950), (7125, 5100, 7475)], vs.bounds),
        "VAL has those bounds",
    )
    not_impl = "We don't support transforming voxel partitions yet. Contribute it!"
    for t in ("translate", "scale", "rotate"):
        with self.subTest(transform=t):
            transform = getattr(part, t)
            with self.assertRaises(LayoutError, msg=not_impl):
                transform(0)