No, I can’t imagine a competent/ethical therapist “testing” any patient. The best way to handle this, and likely a good step for you, would be to talk to your therapist about your fantasies of being abandoned by her. I suspect you might find that difficult if not, you wouldn’t be posing this question here.
I believe your therapist would be pleased if you bring this up and would be happy to discuss this with you. Good luck.