new_contents: #!/usr/bin/env python
  import pytest
  from pytest import approx
  import pymap3d as pm
  from math import nan
  
  lla0 = (42, -82, 200)
  az = [0., 10., 125.]
  
  
  def test_losint():
  
      lat, lon, sr = pm.lookAtSpheroid(*lla0, az[1], tilt=0.)
  
      assert (lat, lon, sr) == approx(lla0)
  
      with pytest.raises(ValueError):
          pm.lookAtSpheroid(lla0[0], lla0[1], -1, az, 0)
  
  
  def test_array():
      np = pytest.importorskip("numpy")
      tilt = [30., 45., 90.]
      lat, lon, sr = pm.lookAtSpheroid(*lla0, az, tilt)
  
      truth = np.array([[42.00103959, lla0[1], 230.9413173],
                        [42.00177328, -81.9995808, 282.84715651],
                        [nan, nan, nan]])
  
      assert np.column_stack((lat, lon, sr)) == approx(truth, nan_ok=True)
  
subject: add back tests