text: from unittest import mock
  import pytest
  import math
  
  from autocnet.transformation import spatial
  
  def test_oc2og():
      lon = 0
      lat = 20
      lon_og, lat_og = spatial.oc2og(lon, lat, 3396190, 3376200)
  
      # calculate lat conversion by hand
      dlat = math.radians(lat)
      dlat = math.atan(((3396190 / 3376200)**2) * (math.tan(dlat)))
      dlat = math.degrees(dlat)
  
      assert math.isclose(lat_og, dlat)
  
  def test_og2oc():
      lon = 0
      lat = 20
      lon_oc, lat_oc = spatial.og2oc(lon, lat, 3396190, 3376200)
  
      dlat = math.radians(lat)
      dlat = math.atan((math.tan(dlat) / ((3396190 / 3376200)**2)))
      dlat = math.degrees(dlat)
  
      assert math.isclose(lat_oc, dlat)
  
  
  def test_reproject():
      with mock.patch('pyproj.transform', return_value=[1,1,1]) as mock_pyproj:
          res = spatial.reproject([1,1,1], 10, 10, 'geocent', 'latlon')
          mock_pyproj.assert_called_once()
          assert res == (1,1,1)
  