class_docstr: Class for testing enhancements in satpy.enhancements.
class_docstr_tok: ["Class","for","testing","enhancements","in","satpy.enhancements","."]
docstr: Test applying the cira_stretch.
code: def test_cira_stretch(self):
      """Test applying the cira_stretch."""
      from satpy.enhancements import cira_stretch
  
      expected = np.array(
          [
              [
                  [
                      np.nan,
                      -7.04045974,
                      -7.04045974,
                      0.79630132,
                      0.95947296,
                  ],
                  [
                      1.05181359,
                      1.11651012,
                      1.16635571,
                      1.20691137,
                      1.24110186,
                  ],
              ]
          ]
      )
      run_and_check_enhancement(cira_stretch, self.ch1, expected)
  
imports: import contextlib
  import os
  from tempfile import NamedTemporaryFile
  from unittest import mock
  import dask.array
  import numpy
  import pytest
  import xarray
  from satpy.enhancements import create_colormap, on_dask_array, on_separate_bands, using_map_blocks
label_desc: Use image node_id 3 for calling the TestEnhancementStretch obj's underlying member method code with example usage: obj.test_cira_stretch() without return types