def test_bool(self):
        prio_set_list = event._PrioritizedSetList()

        assert bool(prio_set_list) is False

        prio_set_list.add(0, None)
        assert bool(prio_set_list) is True
def reset_should_print_backtrace_to_terminal(cls, should_print_backtrace):
        """Set whether a backtrace gets printed to the terminal error stream on a fatal error.

        Class state:
        - Overwrites `cls._should_print_backtrace_to_terminal`.
        """
        cls._should_print_backtrace_to_terminal = should_print_backtrace