Preview lead flow through a smart campaign

Every time we need to develop a lead flow logic, smart campaigns are required in the first place. Sometimes we have to create multiple test campaigns for achieving the desired results.

It would be best if we can have a Lead Flow Preview in place without having to run single or multiple campaigns while testing the logic. We can use dummy or real leads and see whether they'd pass or not through the smartlist criteria, choices, flows, etc without having to make a campaign live.