code: def test_ecef2eci():
      pytest.importorskip("numpy")
      # this example from Matlab ecef2eci docs
      ecef = [-5762640, -1682738, 3156028]
      utc = datetime(2019, 1, 4, 12)
      eci = pm.ecef2eci(*ecef, utc)
  
      rel = 0.01 if astropy is None else 0.0001
  
      assert eci == approx([-2981810.6, 5207039.5, 3161595.1], rel=rel)
  
file_path: pymap3d/src/pymap3d/tests/test_eci.py
imports: from datetime import datetime
  import pymap3d
  import pytest
  from pytest import approx
label_desc: Use image node_id 2 for calling a global function with example usage: test_ecef2eci() without return types