class_docstr: Test the HRITJMAFileHandler.
class_docstr_tok: ["Test","the","HRITJMAFileHandler","."]
docstr: Test that by default the datetime in the filename is returned.
docstr_tok: ["Test","that","by","default","the","datetime","in","the","filename","is","returned","."]
code: def test_start_time_from_filename(self):
      """Test that by default the datetime in the filename is returned."""
      import datetime as dt
  
      start_time = dt.datetime(2022, 1, 20, 12, 10)
      for platform in ["Himawari-8", "MTSAT-2"]:
          mda = self._get_mda(platform=platform)
          reader = self._get_reader(
              mda=mda, filename_info={"start_time": start_time}
          )
          assert reader._start_time == start_time
  
imports: import unittest
  from unittest import mock
  import dask.array
  import numpy
  from xarray import DataArray
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 12 for calling the TestHRITJMAFileHandler obj's underlying member method code with example usage: obj.test_start_time_from_filename() without return types