class_docstr: Test the Scene's handling of various dependencies.
class_docstr_tok: ["Test","the","Scene","'s","handling","of","various","dependencies","."]
docstr: Test all datasets for one reader.
code: def test_all_datasets_one_reader(self):
      """Test all datasets for one reader."""
      scene = Scene(filenames=["fake1_1.txt"], reader="fake1")
      id_list = scene.all_dataset_ids()
      # 20 data products + 6 lon/lat products
      num_reader_ds = 21 + 6
      assert len(id_list) == num_reader_ds
      id_list = scene.all_dataset_ids(composites=True)
      assert len(id_list) == num_reader_ds + 33
  
imports: from unittest import mock
  import pytest
  import xarray
  from dask import array
  from satpy import Scene
  from satpy.tests.utils import make_cid, make_dataid, make_dsq, spy_decorator
label_desc: Use image node_id 5 for calling the TestSceneAllAvailableDatasets obj's underlying member method code with example usage: obj.test_all_datasets_one_reader() without return types