def METHOD_NAME(self):
    """instantiation"""
    try:
        cst = ConfigSectionTree("node1")
    except Exception as ex:
        msg = "Error instantiating ConfigSectionTree:\n"
        msg += str(ex)
        self.fail(msg)
    try:
        helper = TreeHelper(cst)
    except Exception as ex:
        msg = "Error instantiating TreeHelper:\n"
        msg += str(ex)
        self.fail(msg)