class_docstr: Test the Scene's handling of various dependencies.
class_docstr_tok: ["Test","the","Scene","'s","handling","of","various","dependencies","."]
docstr: Test available_composite_ids when a composites dep is missing.
code: def test_available_composite_ids_missing_available(self):
      """Test available_composite_ids when a composites dep is missing."""
      scene = Scene(filenames=["fake1_1ds_1.txt"], reader="fake1_1ds")
      assert "comp2" not in scene.available_composite_names()
  
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 8 for calling the TestSceneAllAvailableDatasets obj's underlying member method code with example usage: obj.test_available_composite_ids_missing_available() without return types