FizzBuzz is one of the simpler TDD Katas, and often the first Kata one will solve.
The rules are the following:
Write a function that accepts a number and returns
a. FIzz if the number is divisible by 3
b. Buzz if the number is divisible by 5
c. FizzBuzz if the number by 3 and 5
Otherwise, it returns the number.
Github Solution in Swift:
https://github.com/Fragki/FizzBuzz