What is the ruling on a fasting person intentionally expelling saliva or food remnants from the throat?

Swallowing one's saliva does not affect the validity of the fast by consensus, and one is not required to expel it. However, it is disliked to accumulate it in the mouth and then swallow it. As for food remnants in the mouth, if they are minor and cannot be expelled, then swallowing them does not break the fast. But if they are substantial and can be expelled, then swallowing them intentionally invalidates the fast according to the majority of scholars.