I have a function which makes a lot of calculations and returns order of sorting. For that function I have tests. Then, that function is used inside of JS native sort method. In that case, I mock my compare function, just to test if it was called with proper parameters.

Code looks like this:

const output = Object.keys(options).sort(compare(param1, param2)); 

compare here is a mock, I check if it was called, check if it was called with proper params.

Is it possible to stop sort execution, or it automatically stops, when it sees it's a mock? I couldn't find any source, that will match my question.