Java, CS, JS: the attempt tests should include fixed tests (see authoring guidelines).

Go translation (removes the last line of the description, see issue above).

Rust translation

Rust translation (author is inactive).

Expected: 2. Result: 2. What the heck is that? Every test case was like that.

Duplicate of "multiplying numbers as strings".

In java version:

• expected and actual are swapped in the seccond assert
• assert mesages are terrible. What is Expected: 7 but was: 9 even supposed to mean in context of string reversal?
• it's a pity that length/2 solutions are rejected, but, yeah, at least it's documented.

Note that bignumber.js is not banned, which makes this kata trivial.

All tests cause wrong answers.
It seems to check if I get the answer with correct length, while it actually thinks all answers should have length 1..

Need actual example test cases (javascript; may also be true for other languages)