docker build -f Dockerfile  -t sonata .

docker run -it -v $(pwd):/app/ sonata

# bundle exec rspec --format=d spec/
SonataSoftware::SoccerExtractor
  .call
    when it loads the data form the scores file
      must have a file_path attr
      must load 20 records
      use a MINIMAL_COLUMNS_LENGTH_PER_ROW constant
      must print the name of the team with the smallest difference in ‘for’ and ‘against’ goals (i.e. Aston_Villa).

SonataSoftware::WeatherExtractor
  .call
    when it loads the data form the daily file
      must have a file_path attr
      must load 31 records
      use a MINIMAL_COLUMNS_LENGTH_PER_ROW constant
      must output the day number (column one) with the smallest temperature spread (i.e. 14 2).

Finished in 0.01341 seconds (files took 0.084 seconds to load)
8 examples, 0 failures

 * All hardcoded values were extracted into its own file
 * Extractor class was added in order to delegate correctly the classes responsibilities.
 * find_smallest, initialize_smallest_spread are now commonly used methods.
 * Preserve SOLID principles as good practices
 * Introduced new module SonataSoftware to share global properties

* Including its own folder regarding the class hierarchy