def test_read_piezo_tensor(self): filepath = os.path.join(test_dir, "OUTCAR.lepsilon.gz") outcar = Outcar(filepath) outcar.read_piezo_tensor() self.assertAlmostEqual(outcar.data["piezo_tensor"][0][0], 0.52799) self.assertAlmostEqual(outcar.data["piezo_tensor"][1][3], 0.35998) self.assertAlmostEqual(outcar.data["piezo_tensor"][2][5], 0.35997)