[kortilla]

That’s not useful. A swapped out hashing algorithm would have been proving the same thing and would have allowed you to test important things like 3+ collisions and two sets of collisions.

Anyone who demanded the real hashing algorithm in this case doesn’t understand how hash collisions work and what problems you need to solve when using hashing. Your “100% accurate test case” serves very little value.

It’s the same as requiring a real person perform the checkout workflow in your shopping cart integration tests. It’s “100% accurate” but it’s a massive waste of resources and provides terrible coverage of the many other edge cases.