Enabling agile devliery through enabling BDD in PHP projects
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The document discusses the significance of Behavior Driven Development (BDD) for enhancing agile processes in PHP projects, led by a BDD expert and creator of various tools like Behat. It emphasizes the role of BDD in improving requirements analysis, design, development, and testing, while also detailing how techniques like StoryBDD help clarify business needs and ensure alignment with client expectations through structured narratives and scenarios. The presentation also addresses the practical implementation of BDD in software development, including feedback loops and examples of feature specifications.
![Requirements
Analysis
Design
Development
Testing
9 months 3 m 2 m 12 m ...
[Royce 1970]](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-12-320.jpg)
![Requirements
Acceptance
Testing
Coding
Refactoring
Weeks Minutes
[Beck & Cunningham 1996-99]](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-15-320.jpg)
![Requirements
Acceptance
Testing
?
Coding
Refactoring
[North 2003]
Weeks Minutes](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-16-320.jpg)
![Requirements
Acceptance
Specification
Implementation
Refactoring
[North 2003]
Weeks Minutes](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-18-320.jpg)
![Adding value
What do you
mean?
Specification
Implementation
Refactoring
[North 2003]
Weeks Minutes](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-20-320.jpg)
![Adding value
What do you
mean?
Specification
Implementation
Refactoring
[North 2003]](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-21-320.jpg)
![Adding value
What do you
mean?
Specification
Implementation
Refactoring
[North 2003]](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-22-320.jpg)
![StoryBDD
SpecBDD
[North 2003]
Adding value
What do you
mean?
Specification
Implementation
Refactoring](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-23-320.jpg)
![Behat
PhpSpec
[North 2003]
Adding value
What do you
mean?
Specification
Implementation
Refactoring](https://image.slidesharecdn.com/enablingagilethroughenablingbdd-140410024004-phpapp01/85/Enabling-agile-devliery-through-enabling-BDD-in-PHP-projects-24-320.jpg)
Enabling agile devliery through enabling BDD in PHP projects
- 1. Enabling Agile Through enabling BDD in PHP projects
- 2. Who? BDD Evangelist ! Creator of Behat, Mink, PhpSpec2, Prophecy ! Contributor to Symfony2, Composer ! Host of the “Elephant in the Room” podcast
- 5. BDD
- 6. – me, this month BDD is a tool to bring structure into the agile processes
- 9. BDD In the Agile process
- 10. BDD is the agile enabler
- 11. How does it enable Agile?
- 12. Requirements Analysis Design Development Testing 9 months 3 m 2 m 12 m ... [Royce 1970]
- 13. Most of the cost in software development is in the feedback delay
- 15. Requirements Acceptance Testing Coding Refactoring Weeks Minutes [Beck & Cunningham 1996-99]
- 20. Adding value What do you mean? Specification Implementation Refactoring [North 2003] Weeks Minutes
- 21. Adding value What do you mean? Specification Implementation Refactoring [North 2003]
- 22. Adding value What do you mean? Specification Implementation Refactoring [North 2003]
- 23. StoryBDD SpecBDD [North 2003] Adding value What do you mean? Specification Implementation Refactoring
- 24. Behat PhpSpec [North 2003] Adding value What do you mean? Specification Implementation Refactoring
- 25. StoryBDD
- 26. StoryBDD looks like a functional TDD to the people from the outside of the BDD community, but it’s a simple confusion.
- 27. We are not testing that application functions as we (developers) expect it to, but instead we’re testing that it fulfils our client business needs.
- 28. Some applications could easily fulfil developers expectations and still not being able to cover business needs.
- 29. You might think about StoryBDD as a technique to teach your clients about testing. In reality it's a tool to teach you about your client business.
- 31. User-story • Narrative • Business rules • Communication • Acceptance criteria
- 32. User-story • Narrative • Business rules == AC • Communication
- 33. User-story • Narrative • Business rules == AC • Comm == Examples
- 34. User-story • Narrative • Business rules • Comm == Examples == AC
- 35. StoryBDD splits every feature in your project into the 3 separate layers.
- 36. Each new layer adds more information to the table.
- 38. 1 2 3 possible scenarios scenario details Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate
- 39. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate 1 2 3scenario details Scenario: Successfully authenticating with correct credentials
- 40. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate 1 2 3 Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” !
- 41. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate 1 2 3 Example: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” !
- 42. Structure In the Agile process
- 43. StoryBDD forces you to answer questions you did not know you need to ask.
- 44. 1. Why? aka: how to prioritise my backlog
- 45. Feature: Authorisation Why might your users want this feature?
- 46. Feature: Authorisation In order to get access to the shopping history
- 47. Feature: Authorisation In order to get access to the shopping history Who is mostly interested in this feature?
- 48. Feature: Authorisation In order to get access to the shopping history As a frequent buyer
- 49. Feature: Authorisation In order to get access to the shopping history As a frequent buyer How can you help him get this value?
- 50. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate
- 51. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate benefit beneficiar
- 52. Feature: Authorisation In order to get access to the shopping history As a frequent buyer I need to be able to authenticate Feature: … In order to … As a … I need to … Feature: … In order to … As a … I need to … Feature: … In order to … As a … I need to … benefit beneficiar
- 53. SELECT f.* as sprint FROM ‘/features’ as f ORDER BY f.role, f.benefit LIMIT 10 PSEUDOAgileQL
- 54. 2. What do you mean? aka: defining done through examples
- 55. How much “done” is “done”?
- 56. How much of the feature should be delivered?
- 57. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” !
- 58. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” ! Given defines initial context
- 59. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” ! When defines a user action (or state transition)
- 60. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” ! Then defines an expected outcome
- 61. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” ! And, But add more context, actions or outcomes
- 62. Scenario: Successfully authenticating with correct credentials Given there is a user “everzet” with password “123” And I am on the login page When I fill in “username” with “everzet” And I fill in “password” with “123” And I press “login” Then I should see “Hello, everzet” !
- 63. 3. When are we done? aka: closing feedback loop
- 65. assertEquals(Your Feature, Your App)
- 66. Setup • Dump your sprint features into text files • Put those text files into the `features/` folder inside project • Install behat (via composer or behat.phar) • Initialize behat test suite by running `bin/behat —init`
- 67. Context <?php ! use BehatBehatContextClosuredContextInterface, BehatBehatContextTranslatedContextInterface, BehatBehatContextBehatContext, BehatBehatExceptionPendingException; use BehatGherkinNodePyStringNode, BehatGherkinNodeTableNode; ! class FeatureContext extends BehatContext { }
- 68. First run $> bin/behat ... You can implement step definitions for undefined steps with these snippets: ! /** * @Then I should see :arg1 */ public function iShouldSee($arg1) { throw new PendingException(); } ...
- 69. Append snippets $> bin/behat --append-snippets
- 70. Feedback loop $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage TODO: write pending definition When I follow “sign up” And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 73. Colour it red.
- 74. Making it fail /** * @Given /^I am on the homepage$/ */ public function iAmOnTheHomepage() { $crawler = new SomeCrawlerLibCrawler(); $crawler->goto(“http://localhost:8080/”); if (200 !== $crawler->getCurrentStatusCode()) { throw new RuntimeException(‘Can not open homepage’); } }
- 75. Making it fail $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage Can not open homepage (RuntimeException) When I follow “sign up” And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 77. Change the message As quickly as you can
- 78. Change the message $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage Can not open homepage (RuntimeException) When I follow “sign up” And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 79. Change the message $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage Route … not found (FrameworkException) When I follow “sign up” And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 80. Change the message $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage Template … not found (FrameworkException) When I follow “sign up” And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 81. Change the message $> bin/behat ! Feature: registration in order to maintain my shopping history as a site visitor i need to be able to register on this site ! Scenario: Successful registration when visitor provides all the required info Given I am on the homepage When I follow “sign up” TODO: write pending definition And I fill in registration form And I submit it Then I should be successfully registered And I should be on the homepage again
- 88. That’s all nice theoretical stuff
- 91. Thank you!