code: def test_allnan():
      np = pytest.importorskip("numpy")
      anan = np.empty((10, 10))
      anan.fill(nan)
      assert np.isnan(pm.geodetic2aer(anan, anan, anan, *lla0)).all()
      assert np.isnan(pm.aer2geodetic(anan, anan, anan, *lla0)).all()
  
file_path: pymap3d/src/pymap3d/tests/test_geodetic.py
imports: from math import isnan, nan, radians, sqrt
  import pymap3d
  import pytest
  from pytest import approx
label_desc: Use image node_id 13 for calling a global function with example usage: test_allnan() without return types