I was actually looking for a method that calculates days. Atleast i know there's formula for that.

JS: Node v14 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

Nice kata.

JS: Node v12 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

JS: No fixed tests

nice kata! :) feels like a good one for learning to balance "clever" and "readable" code... there are many steps that need to be done, but too many one-liners makes for very hard-to-read code.

JS: Should increase the amount of test cases to increase the chance of generating the same string. Otherwise the photoManager is useless and the users don't have to check for existing strings.

That's because there's only 10 test cases so it's highly unlikely that your function will generate the same string twice.

Return true if the number of days passed from last to today is greater than cycleLength. Otherwise, return false.

date(2016, 6, 13) = June 13th, 2016.
date(2016, 7, 16) = July 7th, 2016

There are 33 days between these 2 dates.

On the first test, 33 is smaller than the cycle_length (35), hence returns False.
On the second test, 33 is greater than the cycle_length (28), hence returns True

Hope that clears it up.

I should just return false whenever its invalid, then return true if it's passed. Then the solution is more elegant.