class_docstr: Unit tests for SEVIRI netCDF reader.
class_docstr_tok: ["Unit","tests","for","SEVIRI","netCDF","reader","."]
docstr: Test repeat cycle handling for FD or ReduscedScan.
docstr_tok: ["Test","repeat","cycle","handling","for","FD","or","ReduscedScan","."]
code: def test_repeat_cycle_duration(self, file_handler):
      """Test repeat cycle handling for FD or ReduscedScan."""
      assert 15 == file_handler._repeat_cycle_duration
      # Change the reducescan scenario to test the repeat cycle duration handling
      file_handler.nc.attrs["nominal_image_scanning"] = ""
      file_handler.nc.attrs["reduced_scanning"] = "T"
      # file_handler.trailer['15TRAILER']['ImageProductionStats']['ActualScanningSummary']['ReducedScan'] = 1
      assert 5 == file_handler._repeat_cycle_duration
  
imports: from datetime import datetime
  from unittest import mock
  import numpy
  import pytest
  import xarray
  from satpy.readers.seviri_l1b_nc import NCSEVIRIFileHandler
  from satpy.tests.reader_tests.test_seviri_base import ORBIT_POLYNOMIALS
  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 8 for calling the TestNCSEVIRIFileHandler obj's underlying member method code with example usage: obj.test_repeat_cycle_duration(file_handler) without return types