You have a minimum viable product or high fidelity prototype. Your venture is lucky enough to get an interest from first customers. The problem is that your software product lacks the main feature – stability. This might spoil the opportunity.

1. Autotesting Rails
Covering Rails MVP with autotests

2. Contents
● Why?
● Rspec, shoulda-matchers, FactoryGirl
● Cucumber
● Simplecov
● What next?

3. WHY?

4. Problem
● MVP is ready
● First customers
● Not stable
FAIL

5. Solution
● Manual testing = expensive (time + $)
● Autotesting?
● Yes, we can!

6. TDD - Rspec, shoulda-matchers, FactoryGirl

7. Rspec - testing framework
● All instructions
https://github.com/rspec/rspec-rails

8. Rspec - update Gemfile
group :development, :test do
gem 'rspec-rails', '~> 3.0'
end

9. Rspec - install and generate files
$ bundle install --without production
$ rails generate rspec:install
$ bundle exec rspec

10. Shoulda-matchers - testing one liners
● All instructions
https://github.com/thoughtbot/shoulda-matchers

11. Shoulda - update Gemfile
group :test do
gem 'shoulda-matchers', require: false
end
Run
$ bundle install --without production

12. Shoulda - update rails_helper
● in spec/rails_helper.rb
● after
require 'rspec/rails'
● add
require 'shoulda/matchers'

13. FactoryGirl - setting up test objects
● All instructions
https://github.com/thoughtbot/factory_girl

14. FactoryGirl - update Gemfile
group :test do
gem 'factory_girl'
end
Run
$ bundle install --without production

15. FactoryGirl - update Gemfile
group :test do
gem 'factory_girl'
end
Run
$ bundle install --without production

16. Generate test files for existing model
Run (replace Post with your existing model)
$ rails generate model Post -s
See generated spec and factory files

17. BDD - Cucumber

18. Cucumber - testing framework
● All instructions specific to Rails
https://github.com/cucumber/cucumber-rails
● And overall http://cukes.info/

19. Cucumber - update Gemfile
group :test do
gem 'cucumber-rails', :require => false
gem 'database_cleaner'
end

20. Cucumber - update env.rb
Add to the end of features/support/env.rb
World FactoryGirl::Syntax::Methods

21. Cucumber - install
$ bundle install --without production
$ rails generate cucumber:install
$ bundle exec cucumber

22. Capybara-webkit - testing javascript
● All instructions
o https://github.com/thoughtbot/capybara-webkit
o https://github.com/leonid-shevtsov/headless

23. Capybara-webkit - update Gemfile
group :test do
gem 'capybara-webkit', '~> 1.3.0'
gem 'headless'
end
Run
$ sudo apt-get install xvfb
$ bundle install --without production

24. Cucumber - update env.rb
Add to features/support/env.rb
Capybara.app = Rack::ShowExceptions.new(Rails.application)
# use webkit driver for javascript testing
Capybara.javascript_driver = :webkit
if Capybara.javascript_driver == :webkit
require 'headless'
headless = Headless.new
headless.start
end

25. Code coverage with tests

26. Simplecov - code coverage
● All instructions
https://github.com/colszowka/simplecov

27. Simplecov - update Gemfile
group :test do
gem 'simplecov', :require => false
end
Run
$ bundle install --without production

28. Simplecov - update rails_helper
Add at the very top of spec/rails_helper.rb
require 'simplecov'
SimpleCov.command_name 'RSpec'

29. Simplecov - update env.rb
Add at the very top of features/support/env.rb
require 'simplecov'
SimpleCov.command_name 'Cucumber'

30. Add file .simplecov to rails app root
SimpleCov.start 'rails' do
end

31. Update .gitignore
Append to the file
/coverage

32. Code coverage
Run
$ bundle exec rspec
$ bundle exec cucumber
Open in the browser
coverage/index.html

33. Code coverage report

34. What next?

35. Get down to work and write tests
● https://www.google.com.ua/search?q=rspec
+tutorial
● https://www.google.com.ua/search?q=cucum
ber+tutorial

36. Setup continuous integration
● $$$ Jira + Stash + Bamboo
● Free (even private) Bitbucket + Jenkins*
● Free Github + Jenkins*
* you need servers

37. Anton Naumenko
www.syndicode.co