class_docstr: Tests for the area utilities.
class_docstr_tok: ["Tests","for","the","area","utilities","."]
docstr: Test conversion from angular sampling to line/column offset.
docstr_tok: ["Test","conversion","from","angular","sampling","to","line\/column","offset","."]
code: def test_sampling_to_lfac_cfac(self):
      """Test conversion from angular sampling to line/column offset."""
      lfac = 13642337  # SEVIRI LFAC
      sampling = np.deg2rad(2**16 / lfac)
      np.testing.assert_allclose(sampling_to_lfac_cfac(sampling), lfac)
  
file_path: satpy/satpy/tests/reader_tests/test_geos_area.py
imports: import unittest
  import numpy
  from satpy.readers._geos_area import get_area_definition, get_area_extent, get_geos_area_naming, get_resolution_and_unit_strings, get_xy_from_linecol, sampling_to_lfac_cfac
label_desc: Use image node_id 5 for calling the TestGEOSProjectionUtil obj's underlying member method code with example usage: obj.test_sampling_to_lfac_cfac() without return types