class_docstr: Test reading a single CLAAS2 file.
class_docstr_tok: ["Test","reading","a","single","CLAAS2","file","."]
docstr: Get expected area definition.
docstr_tok: ["Get","expected","area","definition","."]
code: def area_exp(self, area_extent_exp):
      """Get expected area definition."""
      proj_dict = {
          "a": 6378169.0,
          "b": 6356583.8,
          "h": 35785831.0,
          "lon_0": 0.0,
          "proj": "geos",
          "units": "m",
      }
      return AreaDefinition(
          area_id="msg_seviri_fes_3km",
          description="MSG SEVIRI Full Earth Scanning service area definition with 3 km resolution",
          proj_id="geos",
          projection=proj_dict,
          area_extent=area_extent_exp,
          width=3636,
          height=3636,
      )
  
imports: import datetime
  import os
  import numpy
  import pytest
  import xarray
  from pyresample.geometry import AreaDefinition
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 3 for calling the TestCLAAS2SingleFile obj's underlying member method code with example usage: obj.area_exp(area_extent_exp) and returns: AreaDefinition