I would specify 'normalPrice' and 'holidayPrice' as variable names in the method, just as a best practice.

done :)

The method should be called 'whoEatsWhom'

#sorrynotsorry

Great idea! How did I not think of it when creating the test cases :)
Thanks!

No need for double quotes. A single-quoted strings don’t process ASCII escape codes, and they don’t do string interpolation while double-quoted does both.

This solution is clever, but not very scalable in case of other coffee types

consider not including a return statement in the default fill-in solution for ruby, as it's discouraged in the style guide.

Nice solution! Please check my (small) stylistic improvement for this solution - https://www.codewars.com/kumite/577ced176a3c22db770000a8?sel=5a37566b1f7f7095aa000088

~ commences seppuku since my solution was way more convoluted ~