LGTM

Thanks man!

Happy to hear that ^_^

There is a problem with random tests. There were some failing tests and then, when I tried to debug it, all tests were passing

I added the test case. Thank you!

Javascript translation

Description updated, Thank you :)

oh! my bad! I guess it's a little bit late to fix that typo, all solutions mill marked as invalid :/

Testing error's message will help especially for random tests, to make sure you're throwing the right exception

Hi!

expected and actual are inverted

Fixed.

nothing is said about it in the description

I updated the description

this is double pain for the user: it's perfectly possible to implement the parser so that it throws an exception when required, but without using a try/catch block to actually set the message (or using a regexp or whatever to check the input string. And same observation for the rollback method).

Didn't unserstand your point

EDIT: and that thing is not really appealing:

Fixed.

I updated the description

I updated the description

.

Done

I changed the version generator algorithm. thank you for your feedback :)