Refactoring using feature spec and service objects

Talk given by me mumbai rb yesterday

Transcript

1. Refactoring Feature Specs Service Objects
2. Avinash Gosavi An engineer by education. Rubyist by profession. Currently working for Freewave. You can catch with me later on twitter @aag1091
3. When do we need to refactor? • A working code is always precious so there is no point in refactoring what is already working. • We need refactoring only for the code which is not working as it should (slow, flawed, buggy, etc). • Which brings me too legacy code
4. Legacy Code source code inherited from someone else and source code inherited from an older version of the software. A y code that was writte a couple of o ths ago is a legacy code. – by me code is legacy code as soon as it's written. – from stackoverflow
6. The best definition for Legacy code Michael Feathers i troduced a definition of legacy code as code without tests.’
7. How to tackle legacy code • Make sure you know the requirements of the code you are going to work on before you start browsing the code. • Checkout the test cases that have been already added if any. • Assess which are the important parts, so that you can cover them first.
8. So how do we start? Lets configure our test environment for feature spec
9. gems required for testing. # test gems group :test do gem 'database_cleaner' gem 'shoulda-matchers' gem 'capybara' gem 'capybara-webkit' gem 'guard-rspec' gem 'spork-rails' gem 'launchy' gem 'faker' gem 'selenium-webdriver' gem 'simplecov', :require =< false End # For checking syntax and logical errors group :development do gem 'rails_best_practices' gem 'rubocop' end
10. A feature spec example. . https://gist.github.com/aag1091/716 6309
11. Now that we have covered legacy code with feature specs. We are now ready to refactor
12. A sample example of a service object. https://github.com/aag1091/soa- demo
13. A simple inherited service object example https://gist.github.com/aag1091/f92 436ec9d775d66e0d5
14. Refactoring Spells http://ghendry.net/refactor.html
15. That s all – happy coding