BDD using behat
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The document outlines the principles and practices of Behavior Driven Development (BDD) using Behat, emphasizing the importance of clear communication between business and development teams through human-readable stories. It covers installation steps, feature and scenario creation using Gherkin syntax, and introduces tools like Mink and Selenium for testing web applications. Additionally, it discusses common anti-patterns in writing BDD scenarios and promotes best practices for effective implementation.
![When i fill in 'input.flooble-widgets[:first]' with 'FooBar'
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Write BDD in the domain language
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You should never see any DOM elements](https://image.slidesharecdn.com/bddusingbehat-140118144048-phpapp01/85/BDD-using-behat-29-320.jpg)
BDD using behat
- 1. Behaviour Driven Development using Behat
- 2. Isn’t it obvious…??? ○ What test should I write next? ○ How do I know when I’ve written the last test? ○ Am I writing the right code?
- 4. “ If you can't explain it simply, you don't understand it well enough ! Albert Einstein ”
- 5. Why BDD? ○ Write Human-readable stories that describe the behaviour of your application ○ Focuses the communication between the business and the developers ○ Code is self documenting ○ Code is easier to maintain
- 6. BEHAT INSTALL ○ Composer ○ PHAR ○ GIT INIT ○ mkdir Calculator ○ cd Calculator ○ behat --init ./features /bootstrap FeatureContext.php
- 8. Feature - Gherkins # features/BananaCalculator.features # Describe the business value of this feature Feature: Banana Calculator As Bob the Banana merchant, I want a calculator that can add the amount of bananas so that I can know how many bananas I currently have
- 9. Scenario - Gherkins # features/BananaCalculator.features # Describe the business rules with scenarios Scenario: Will add 2 banana amounts
- 10. Steps - Gherkins # features/BananaCalculator.features # Describe the steps Given I have 3 Bananas When I add 5 Bananas Then I should have 8 Banana
- 11. Example Feature: Banana Calculator As Bob the Banana merchant, I want a calculator that can add the amount of bananas so that I can know how many bananas I currently have Scenario: Will add 2 banana amounts Given I have 3 Bananas When I add 5 Bananas Then I should have 8 Banana
- 15. Scenario Outline
- 16. Passing Parameters and Tagging
- 17. @BeforeSuite
- 18. Managing Sub-Context ○ Context files can get really big really fast ○ Certain steps are repeated across multiple Feature files
- 20. Mink In order to test, that our web application behaves correctly, we need a way to simulate this interaction between browser and web application in our tests Mink is an open source acceptance test framework for web applications
- 22. Goutte ○ Headless Browser ○ No JS support ○ Good for testing REST API
- 23. Selenium ○ JS Support ○ Can run multiple browser ○ Need to start Selenium RC ○ Not Headless ○ Need to load Drivers for different browsers ○ Doesn’t play nice at times java -jar selenium-serverstandalone.jar java -jar selenium-serverstandalone.jar Dwebdriver.chrome.driver= "/usr/local/bin/chromedriver"
- 24. Sahi ○ JS Support (kinda) ○ Can run Multiple browsers ○ Need to setup localhost proxy in browser ○ Not headless ○ Issues with Ajax Request
- 25. PhantomJS ○ JS Support ○ Headless browser ○ Pure Awesomeness ! phantomjs --webdriver=8643
- 27. DEMO
- 29. When i fill in 'input.flooble-widgets[:first]' with 'FooBar' ○ Write BDD in the domain language ○ You should never see any DOM elements
- 30. Anti-pattern When I subscribe to the newsletter rather than And I set the value of 'input#newsletter-signup-checkbox' to '1' and When I search for articles containing the words 'rockets' rather than When I fill in 'input#search-terms' with 'rockets' And I click 'button#search-button'
- 31. And I wait 10 seconds ○ This is not a requirement ○ Roll up the execution into the page element
- 32. Try this public function search($keywords) { $searchForm = $this->find('css', 'form#search'); if (!$searchForm) { throw new ElementNotFoundException($this->getSession(), 'form', 'css', 'form#search'); } $searchForm->fillField('q', $keywords); $searchForm->pressButton('Google Search'); return $this->getPage('Search results'); }
- 33. IN CONCLUSION
- 35. BDD & TDD = BFF
- 36. Thank you