class_docstr: Test the HRITFileHandler.
class_docstr_tok: ["Test","the","HRITFileHandler","."]
code: def _get_fake_data(self):
      return xr.DataArray(
          data=np.zeros((self.nlines, self.ncols)), dims=("y", "x")
      )
  
imports: import unittest
  from datetime import datetime
  from unittest import mock
  import numpy
  import pytest
  import xarray
  from numpy import testing
  from pyproj import CRS
  import satpy.tests.reader_tests.test_seviri_l1b_hrit_setup
  from satpy.readers.seviri_l1b_hrit import HRITMSGEpilogueFileHandler, HRITMSGFileHandler, HRITMSGPrologueFileHandler
  from satpy.tests.reader_tests.test_seviri_base import ORBIT_POLYNOMIALS_INVALID
  from satpy.tests.reader_tests.test_seviri_l1b_calibration import TestFileHandlerCalibrationBase
  from satpy.tests.utils import assert_attrs_equal, make_dataid
label_desc: Use image node_id 2 for calling the TestHRITMSGFileHandler obj's underlying member method code with example usage: obj._get_fake_data() and returns: xr