I've built an app that parses and aggregates performances of top London theaters: Southbank Centre, National Theatre, Royal Opera House.
I wrote a parser for What's On page for each theatre using Nokogiri library. Check out app/models/event_fetcher.rb to see the parser code.
Each theatre has it's own filters, depends on information they provide on a website: by tags, by time, by price.
I decided to try using codecov library that calculates code coverage.
That helped me to increase code coverage to 96%.
