[TypeScript]
The types for the TypeScript translation are incorrect.

String represents the gloabl string object, it is not the right type to use for a primitive string.
string should be used instead for the parameter.
See https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#the-primitives-string-number-and-boolean
and https://www.typescriptlang.org/docs/handbook/declaration-files/do-s-and-don-ts.html#general-types
in the TypeScript handbook.

Kinda ironic for a kata tagged with "string" and "fundamentals".

I suggest unpublishing the kata before it gets retired.

1. The idea of this kata is by no means novel as there are many DNA-decoding/-encoding katas.
2. IMO "This kata aims to get you to use your knowledge of bitwise operators." is a bit off and
3. "The bin function has been disabled in Python." is kind of pointless. It's easy to get the binary representation of an int without this function (see this example).

Regards, suic

Random tests don't show the lambda expressions as input, making it hard to debug.
They should be added either in the "it" or in the assertion failure message.