def METHOD_NAME(self):
    ts_db = Touchstone("./tests/data/attenuator-0643_DB.s2p")
    ts_db.load()
    ts_ri = Touchstone("./tests/data/attenuator-0643_RI.s2p")
    ts_ri.load()
    ts_ma = Touchstone("./tests/data/attenuator-0643_MA.s2p")
    ts_ma.load()
    self.assertEqual(len(ts_db.s11), len(ts_ri.s11))
    for dps_db, dps_ri in zip(ts_db.s11, ts_ri.s11):
        self.assertAlmostEqual(dps_db.z, dps_ri.z, places=5)
    self.assertEqual(len(ts_db.s11), len(ts_ma.s11))
    for dps_db, dps_ma in zip(ts_db.s11, ts_ma.s11):
        self.assertAlmostEqual(dps_db.z, dps_ma.z, places=5)