def METHOD_NAME(self):
    unchunk_dataset(self.TEST_ZARR, var_names=['time'], coords_only=True)
    unchunk_dataset(self.TEST_ZARR, var_names=['time'], coords_only=True)
    unchunk_dataset(self.TEST_ZARR, var_names=['time'], coords_only=True)
    self._assert_cube_files(expected_a_files=self.chunked_a_files,
                            expected_b_files=self.chunked_b_files,
                            expected_time_files={'.zarray', '.zattrs', '0'},
                            expected_lat_files=self.chunked_lat_files,
                            expected_lon_files=self.chunked_lon_files)