def METHOD_NAME(generate_calculation_node):
    """`get_results` should raise `ValueError` if process class does not define default output node."""
    # This is a valid process class however ArithmeticAddCalculation does define a default output node
    node = generate_calculation_node(entry_point='aiida.calculations:core.arithmetic.add')
    manager = CalcJobResultManager(node)
    with pytest.raises(ValueError):
        manager.get_results()