class_docstr: Test case for computing HRPT navigation.
class_docstr_tok: ["Test","case","for","computing","HRPT","navigation","."]
docstr: Set up the test case.
code: def setUp(self) -> None:
      """Set up the test case."""
      super().setUp()
      self.fake_lons = np.ones((NUMBER_OF_SCANS, SWATH_WIDTH))
      self.fake_lats = np.ones((NUMBER_OF_SCANS, SWATH_WIDTH)) * 2
  
imports: import os
  import unittest
  from contextlib import suppress
  from tempfile import NamedTemporaryFile
  from unittest import mock
  import numpy
  import xarray
  from satpy.readers.hrpt import HRPTFile, dtype
  from satpy.tests.reader_tests.test_avhrr_l1b_gaclac import PygacPatcher
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 1 for calling the TestHRPTNavigation obj's underlying member method code with example usage: obj.setUp() without return types