By default, if a test passes, Rust’s test library captures anything printed to standard output.
Rust Book

Looks like the solution is flags passed to cargo (e.g. $ cargo test -- --nocapture), but I don't think that's possible...

I'll do some research on that with other Rust Katas and see how to do that.

• I returned 1 by default in the setup to avoid the compiler error about mismatched types
• I switched to u32 (not that it really matters with such small integers)
• I switched to Vectors instead of slices (since in the random tests, we're already creating Vectors)

I favored fold on the Iterator trait (this is the largest change based on something I liked in the JavaScript solutions)

FYI: The output for the random tests only appears if the solution is wrong

Shell translation with random tests for review

Shell translation with random tests submitted

Shell translation added for review.

Java translation added with random tests.

Ruby translation now with random tests! Thanks for the suggestion @Voile

Review and approve, or suggest more edits :)

Sounds like a plan!

Shell translation

Please review and approve

Ruby translation without random tests... feel free to improve with them.

Please review and approve.

Shell translation

Please review and accept

Shell translation
Please review and accept

Ruby translation without random tests.... it was close to timing out with the largest numbers, so I left the random tests out.