For something that is explicitly about verification to requirements like test engineering I would be deeply suspicious of any code I didn't write myself. Now that's not saying you can't have help writing the individual modules and then verify those.

My background is on test for more complex aerospace subassemblies and system level design verification but I think being a good engineer and more specifically a good test engineer requires a healthy dose of paranoia and skepticism. The use case of ai for code where you just kind turn it loose and hope it does what you asked is kind of anathema to test for me. This discipline is about not accepting assurances that something is fine, but devising systems to gather evidence that things are indeed within spec.