class_docstr: Tests for ``ParamArg``.
class_docstr_tok: ["Tests","for","``","ParamArg","``","."]
docstr: Test that __str__ returns the value of the enum.
docstr_tok: ["Test","that","__str__","returns","the","value","of","the","enum","."]
code: def test_str(self, val):
      """Test that __str__ returns the value of the enum."""
  
      assert str(val) == val.value
  
file_path: pennylane/tests/data/data_manager/test_params.py
imports: import pytest
  from pennylane.data.data_manager.params import Description, ParamArg, format_param_args, format_params
label_desc: Use image node_id 3 for calling the TestParamArg obj's underlying member method code with example usage: obj.test_str(val) without return types