class_docstr: Test locating the satellite.
docstr: Test getting the position in cartesian coordinates.
docstr_tok: ["Test","getting","the","position","in","cartesian","coordinates","."]
code: def test_eval_polynomial(self, orbit_polynomial, time):
      """Test getting the position in cartesian coordinates."""
      x, y, z = orbit_polynomial.evaluate(time)
      np.testing.assert_allclose(
          [x, y, z],
          [42078421.37095518, -2611352.744615312, -419828.9699940758],
      )
  
imports: import unittest
  from datetime import datetime, timedelta
  import dask.array
  import numpy
  import pytest
  import xarray
  from satpy.readers.seviri_base import MEIRINK_COEFS, MEIRINK_EPOCH, NoValidOrbitParams, OrbitPolynomial, OrbitPolynomialFinder, SEVIRICalibrationHandler, chebyshev, dec10216, get_cds_time, get_padding_area, get_satpos, pad_data_horizontally, pad_data_vertically, round_nom_time
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 3 for calling the TestSatellitePosition obj's underlying member method code with example usage: obj.test_eval_polynomial(orbit_polynomial, time) without return types