def METHOD_NAME(self):
    dfbuilder = rsdf._RSGDFBuilder(cell, auxcell, kpts)
    dfbuilder.__dict__.update(dfobj.__dict__)
    dfbuilder.build()
    with tempfile.NamedTemporaryFile() as tmpf:
        dfbuilder.make_j3c(tmpf.name)
        v2 = load(tmpf.name, kpts[[0, 0]])
        self.assertAlmostEqual(lib.fp(v2), 1.4877735852543206, 8)