class_docstr: Test AMSR2 L1B Reader.
docstr: Test loading of 89GHz channels.
docstr_tok: ["Test","loading","of","89GHz","channels","."]
code: def test_load_89ghz(self):
      """Test loading of 89GHz channels."""
      from satpy.readers import load_reader
  
      r = load_reader(self.reader_configs)
      loadables = r.select_files_from_pathnames(
          [
              "GW1AM2_201607201808_128A_L1DLBTBR_1110110.h5",
          ]
      )
      assert len(loadables) == 1
      r.create_filehandlers(loadables)
      ds = r.load(
          [
              "btemp_89.0av",
              "btemp_89.0ah",
              "btemp_89.0bv",
              "btemp_89.0bh",
          ]
      )
      assert len(ds) == 4
      for d in ds.values():
          assert d.attrs["calibration"] == "brightness_temperature"
          assert d.shape == DEFAULT_FILE_SHAPE
          assert "area" in d.attrs
          assert d.attrs["area"] is not None
          assert d.attrs["area"].lons.shape == DEFAULT_FILE_SHAPE
          assert d.attrs["area"].lats.shape == DEFAULT_FILE_SHAPE
  
file_path: satpy/satpy/tests/reader_tests/test_amsr2_l1b.py
imports: import os
  import unittest
  from unittest import mock
  import numpy
  from satpy.tests.reader_tests.test_hdf5_utils import FakeHDF5FileHandler
  from satpy.tests.utils import convert_file_content_to_data_array
label_desc: Use image node_id 5 for calling the TestAMSR2L1BReader obj's underlying member method code with example usage: obj.test_load_89ghz() without return types