class_docstr: Test the scene class.
class_docstr_tok: ["Test","the","scene","class","."]
docstr: Test iteration over the scene.
docstr_tok: ["Test","iteration","over","the","scene","."]
code: def test_iter(self):
      """Test iteration over the scene."""
      scene = Scene()
      scene["1"] = xr.DataArray(np.arange(5))
      scene["2"] = xr.DataArray(np.arange(5))
      scene["3"] = xr.DataArray(np.arange(5))
      for x in scene:
          assert isinstance(x, xr.DataArray)
  
imports: import math
  import numpy
  import pytest
  import xarray
  from dask import array
  from satpy import Scene
  from satpy.dataset.dataid import default_id_keys_config
  from satpy.tests.utils import FAKE_FILEHANDLER_END, FAKE_FILEHANDLER_START, make_cid, make_dataid
label_desc: Use image node_id 3 for calling the TestDataAccessMethods obj's underlying member method code with example usage: obj.test_iter() without return types