functions › greet
  ✅ should log 'Hello <name>' when name is provided
functions › isOdd
  ✅ should return true if the number is odd
  ✅ should return false if the number is even
  ✅ should return false for zero
functions › oddsSmallerThan
  ✅ should return the correct number of odd numbers smaller than an odd number
  ✅ should return the correct number of odd numbers smaller than an even number
  ✅ should return 0 if there are no odd numbers smaller than 1
functions › squareOrDouble
  ✅ should return the square if the number is odd
  ✅ should return double if the number is even
  ✅ should return 0 if the number is 0