Now that the preparations are done, we can apply the 2-book-discount rule to every pair of books in our order. This finally makes our test go green! ► All Potter Kata Episodes: http://goo.gl/m9E4vF ► Let’s Develop! http://letsdeveloper.com ► Don’t Miss an Episode: http://goo.gl/whzDi1 ► CodingDojo: http://codingdojo.org/cgi-bin/index.pl?KataPotter ► The Code: https://github.com/letsdeveloper/Lets-Develop-Code-Kata […]