exercise: WordCount
version: 1
plan: 12
imports: '&count-words'
tests: |
  is-deeply (% = .<input>.&count-words), |.<expected description> for @($c-data<cases>);

unit: module
example: |
  sub count-words (Str:D $str --> Hash:D) is export {
    $str.lc.comb(/ <alnum>+ (\'<alnum>+)? /).Bag.hash
  }
stub: |
  sub count-words ($str) is export {
  }