I know, and also exactly this tests in "Attempt" was marked as failed. I figured it with output in console all input data. More strange that 1 test marks as Passed and failed in one time.

When pressed "Test", your solution is tested through fixed small number of tests, but when you press "Attempt", your solution is tested through lots of edge cases and random tests.

In anycase, that's not an issue.

I'm not sure what's wrong with my solution. It must work and do all right, when i press "Test" button - it passes all basic tests, but when i press "Attempt" button - it show "Passed: 2 Failed: 2", every test marks red color, but after every test i got label "Test Passed", and also at end i got message in log "Congratulations! You have passed all the tests! I'm waiting for your feedback, rank and vote.many thanks! ;-)". I got points for solving this kata, can see other solutions, but can't send my solution. What can it be?

Here no test for more open braces, than close. I mean my first attempt code will return "true" on string like "(((" and it passes all tests.

p.s. Sorry for my english :P