class_docstr: Test that ``DatasetNone`` is correctly bind and value
  initialized.
class_docstr_tok: ["Test","that","``","DatasetNone","``","is","correctly","bind","and","value","initialized","."]
code: def test_default_value(self):
      dsets_none = DatasetNone(None)
      dsets_default = DatasetNone()
  
      assert dsets_none == dsets_default
  
imports: import pytest
  from pennylane.data.attributes.none import DatasetNone
label_desc: Use image node_id 3 for calling the TestDatasetsNone obj's underlying member method code with example usage: obj.test_default_value() without return types