brute force solution should not pass the tests. try to finding the law and make a clever solution ;-)

PHP version!Cheers

I concur, it should be used more often for this kind of neat katas :)

@BrianLusina you have made cool kata,thanks!

IMO add puzzle tag ;D

Noted. Crystal translation approved.

Nope, just the same error message and the same type of exception is thrown for each data type that is not an integer.

Noted and updated. Thank you

The second example should be:

Allergies(255).allergies()

this way the description don't give any hints about the implementation.

In python the instruction example says says:
allergies = Allergies(0)
allergies.is_allergic_to('peanuts') = True

In the test it says:
allergies = Allergies(0)
allergies.is_allergic_to('peanuts') = False

Crystal translation kumited too; you might notice the tests for the type missing, but they are kinda pointless in a statically typed language.

The rest is all there :)

My code works fine except for the tests where it's supposed to throw a type error. I've tested the code in my IDE (PyScripter) with all the invalid data types I can think of and it always throws a type error there, but apparently it's not doing it in the kata tests. Is there something I'm missing? Is each invalid data type supposed to show a specific error message?