def METHOD_NAME(self):
    # Test cylindrical geometry
    fields = ["density", "cell_mass"]
    units = ["g/cm**3", "g"]
    ds = fake_amr_ds(
        fields=fields, units=units, geometry="cylindrical", particles=16**3
    )
    dd = ds.all_data()
    proj = ds.proj(
        ("gas", "density"),
        weight_field=("gas", "cell_mass"),
        axis=1,
        data_source=dd,
    )
    frb = proj.to_frb((1.0, "unitary"), 64)
    assert_equal(frb.radius, (1.0, "unitary"))
    assert_equal(frb.buff_size, 64)