Lots of questions on this forum revolve around how to identify a shit test and maintain frame. I'm going to give you a maxim that should help frame the problem.

Strength doesn't justify itself to weakness.

Every shit test boils down to this: it involves a woman asking you to justify yourself or your actions to her. If you do so, she can only assume you occupy a position of weakness, and dudes, nothing generates more feminine disgust than a weak man.

Nothing.

The reason a woman relies on the shit test is because she doesn't have any real frame of reference. She isn't worried about having to physically fight for her place in the social hierarchy. She hasn't lived a life of male competition. She has no idea what strength really looks like.

So, she asks you to justify yourself to her in order to find out. If you do so, you must be weaker than her, ergo you are certainly weaker than other potential suitors.

So, if you want to identify a shit test, just ask yourself, "is she asking me to justify myself or my actions?" If the answer is "yes," it's a shit test.

Don't fucking do it.

In fact, as a general rule, don't do it to anyone, unless they are legitimately in a position such that they might ruin your universe. The number of people in such a position are pretty rare, though, and include such people as your employer or the cop who pulled you over on suspicion of a DWI. The list doesn't include some girl you're talking shot to at a bar, nor does it include her beta orbiter who's sitting beside her throwing salt in your game with little snark comments.

So, become strong. That's what study and exercise are for. Once you're strong, just remember: you don't need to justify yourself to (almost) anyone.