Behaviour driven development present
- 1. Behaviour Driven Development with using Cucumber and Rspec By Rahul Panjiyar
- 2. What is BDD? • Increase collaboration • Test Driven • Outside-in* • Natural Language • What you were thinking and what you were trying to achieve?
- 3. Why Test? • ‘The bigger they come, the harder they fall’. • Easier to debug • Better understanding of requirements • More flexible • A bug is not an error in logic, it is a test you forget to write.
- 4. Outside-in • Satisfy the needs of stakeholders • Speak in natural language • Test in natural language • Red- Green- Refactor*
- 5. The Perfect Suite • Cucumber • BDD Acceptance Testing Framework • RSpec • BDD Unit Testing Framework
- 6. Cucumber • Users plain text to convey test cases • Speak & address to stakeholders needs • Automate functional validation • Executable specifications • Living Documentation
- 7. Why use Cucumber? • Easy to setup* • Supports multiple report formats • Supports different ways of describing executable specifications • Supports writing specifications in about 40 spoken languages • Web testing libraries
- 10. Using Cucumber with other platforms Platform Tools Frank Cuke4AS3 Cuke4PHP Cucumber-js SpecFlow Cucumber-jvm CukeBins
- 11. Cucumber code • Typical Feature Description In order to <gain business value> As a <role> I want to <perform an action> • Typical Test Scenario Given <some context> When I <perform some action> Then I should <observe expected outcome>
- 12. Cucumber in the real world • One feature summary per file <Role> <Performs action> • Feature: User Submits blog post In order to share my thoughts with the world As a blog author I want to post to my blog • Multiple scenarios (Test Cases) per feature • Exercise entire application stack • Write from stakeholders perspective
- 13. Contd.. Scenario: Submit valid blog post Given I am on the blog page When I fill in “title” with “My first post” And I fill “body” with “Test page” And I press “submit” Then I should be on the blog page And I should see “My first post”
- 14. Cucumber step definitions • Maps test code to plain text steps Given I am on the new post page Given /^I am on the (.+)$/ do |page_name| visit path_to(page_name) end
- 15. RSpec • Unit tests in plain English • Integrated mocking and stubbing framework • Plays nice with Test::Unit
- 16. RSpec By Example describe “guess” do it "sends the mark to output" do game.start('1234') output.should_receive(:puts).with('++++') game.guess('1234') end
- 17. Red Green Refactor • Get to Red Write your test First! Use the code you Wish You Had Run the suite and watch your test fail • Get to Green Write your implementation code Run the site and watch it pass • Refactor Look for opportunities to improve your code Run the tests again, you should see still see Green
- 18. R G R in practice • From cucumber Write your scenario Get to Red • Drill down into Rspec Red-Green-Refactor • Back up to Cucumber Get to Green
- 19. $ gem install cucumber
- 20. $ rails generate cucumber:install $ rails generate rspec:install
- 22. $ cucumber --i18n help $ cucumber –i18n pt #language: pt Cenário: Realizar uma pesquisa Dado que acessei o site “http://www.google.com.br” Quando eu informar o texto “ele é um fofo” no campo de busca. E acionar o botao Pesquisa Google Então a lista de resultados deve conter o texto “todateen.uol.com.br/garotastt/ele-e-fofo-mas-nao-e- bonito-vale-a-pena-dar-uma-chance-pra-ele”
- 24. features/ companies.feature steps/ company_steps.rb
- 25. Given == Setup
- 28. When == Change
- 29. When == Change
- 30. Then == Outcome
- 32. THANK YOU