5 random tests are too small. Consider increasing them to at least 100 to ensure faulty solutions don't pass.

Missing edge case tests with speed == 0 && desiredLength == 0: https://www.codewars.com/kata/reviews/57b99f05a09e1c192d00008e/groups/5e2b1e715c9ce60001a18e7c

Some solution pass all fixed tests and sometimes pass all random tests: https://www.codewars.com/kata/reviews/57b99f05a09e1c192d00008e/groups/5e2b1af7a778610001f7ddc3

Nice kata!

two reduces because reduce is my favourite function

I intended the low number of shaves to be the a secondary condition, as I said.

'If there are multiple possible routes, please return the one with the least shaving required. Tony hates shaving.'

I'll the description to make this clearer! THanks for the feedback.

Definitely, the best choice is not to shave at all, since, least days and least shaves conditions are conflicting.

please return the one with the least shaving required. Tony hates shaving.

This sentence makes me feel that the best choice is not to shave the beard. Because Tony hates shaving.

Least number of days should be main priority. I also intended for each shaving to add a day to the overall time. I will revise the description to make this clearer :)

Test.assertSimilar(beardGrower(1, 1, 5), ['1 shave', '4 days'], 'should work for basic cases')
Why not ['No shave', '5 days']? ;-)

Test.assertSimilar(beardGrower(1, 1, 50), ['4 shaves', '14 days'], 'and for larger beards')
Why not ['4 shave', '10 days']? ;-)

I agree! There's a lot of learning packed into this one kata!

Cool Kata! Made me think about different ways to extract information from strings.