Thanks for suggesting, they're now in task segment.

There's actually no point. I reduced max string length from 10000 to 500 but increase the number of tests now.

It's possible for fixed tests only. The random tests produce error from randomizing function. And I put "It" around the fixed tests now.
There's probably a way to do it on random tests, but I don't know.

Thanks for suggesting, this test is now added.

There're sample tests now.

There're random tests now.

This is my first time generating random numbers and strings, so I don't really know how it works. It's now fixed.

The function is now only input the string. Thanks for pointing this out.

I removed that sentence already. You're right, it makes no sense.