def METHOD_NAME(self):
    """Test loading of basic channels."""
    from satpy.readers import load_reader
    r = load_reader(self.reader_configs)
    loadables = r.select_files_from_pathnames([
        'GW1AM2_202004160129_195B_L2SNSSWLB3300300.h5',
    ])
    self.assertEqual(len(loadables), 1)
    r.create_filehandlers(loadables)
    ds = r.load(['ssw'])
    self.assertEqual(len(ds), 1)
    for d in ds.values():
        self.assertTupleEqual(d.shape, (DEFAULT_FILE_SHAPE[0], int(DEFAULT_FILE_SHAPE[1])))
        self.assertIn('area', d.attrs)
        self.assertIsNotNone(d.attrs['area'])
        self.assertTupleEqual(d.attrs['area'].lons.shape,
                              (DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1]))
        self.assertTupleEqual(d.attrs['area'].lats.shape,
                              (DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1]))