Driving Your Domain By Examples

How to use Gherkin scenarios and Behat to drive your development into modelling the problem you're trying to solve rather than an arbitrary and possibly inadequate solution.
Slides for the version of the talk delivered at the Developers Paradise conference in Opatija, Croatia on Apr 26, 2016

Related Links:
- Introducing Modelling by Example http://stakeholderwhisperer.com/posts/2014/10/introducing-modelling-by-example
- Named Constructors in PHP http://verraes.net/2014/06/named-constructors-in-php/
- An Introduction to BDD from Konstantin Kudryashov https://www.youtube.com/watch?v=njcHzGYv7nI

Transcript

1. Sample Title DevelopersParadise 2016 / Opatija / Croatia Driving your domain by examples
2. DevelopersParadise 2016 / Opatija / Croatia Marco Lopes Senior Software Engineer - Session Digital @mpmlopes
3. DevelopersParadise 2016 / Opatija / Croatia Once upon a time…
4. DevelopersParadise 2016 / Opatija / Croatia Everything changes
5. DevelopersParadise 2016 / Opatija / Croatia PANIC! NOW!
6. DevelopersParadise 2016 / Opatija / Croatia Why does it happen?
7. DevelopersParadise 2016 / Opatija / Croatia Short feedback cycle
8. DevelopersParadise 2016 / Opatija / Croatia Short feedback cycle AKA Agile
9. DevelopersParadise 2016 / Opatija / Croatia Can we do more?
10. DevelopersParadise 2016 / Opatija / Croatia Shorten feedback cycle
11. DevelopersParadise 2016 / Opatija / Croatia BDD
12. DevelopersParadise 2016 / Opatija / Croatia Behat & PHPSpec
13. DevelopersParadise 2016 / Opatija / Croatia Modelling by Example
14. DevelopersParadise 2016 / Opatija / Croatia Domain Suite
15. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given AwesomePay has credit card payments enabled
 When I fill the credit card number with 4444333322221111 And I fill the expiry date with ”04/2018” And I fill the CCV with 123 And the credit card has unlimited funds on payment gateway
 And I press place order button
 Then the payment should be accepted And the magento order status should be ”processing”
16. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given AwesomePay has credit card payments enabled
 When I fill the credit card number with 4444333322221111 And I fill the expiry date with ”04/2018” And I fill the CCV with 123 And the credit card has unlimited funds on payment gateway
 Then the payment should be accepted And the magento order status should be ”processing”
17. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given AwesomePay has credit card payments enabled
 When I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway
 Then the payment should be accepted And the magento order status should be ”processing”
18. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given AwesomePay has credit card payments enabled
 And I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway When I pay £42 using that credit card
 Then the payment should be accepted And the magento order status should be ”processing”
19. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given the payment gateway has credit card payments enabled
 And I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway When I pay £42 using that credit card
 Then the payment should be accepted And the magento order status should be ”processing”
20. DevelopersParadise 2016 / Opatija / Croatia AwesomePay Magento Interfaces Interfaces Domain
21. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given the payment gateway has credit card payments enabled
 And I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway When I pay £42 using that credit card
 Then the payment should be accepted And the magento order status should be ”processing”
22. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given the payment gateway has credit card payments enabled
 And I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway When I pay £42 using that credit card
 Then the payment should be accepted
23. DevelopersParadise 2016 / Opatija / Croatia /**
 * @Given the payment gateway has credit card payments enabled
 */
 public function thePaymentGatewayHasCreditCardPaymentsEnabled()
 {
 $this->paymentGateway = new FakePaymentGateway();
 expect( $this->paymentGateway->HasCreditCardPaymentsEnabled() )->toBe(true);
 }
24. DevelopersParadise 2016 / Opatija / Croatia /**
 * @Given I have credit card :aCreditCard
 */
 public function iHaveCreditCard(CreditCard $aCreditCard)
 {
 $this->creditCard = $aCreditCard;
 }
25. DevelopersParadise 2016 / Opatija / Croatia /**
 * @Transform :aCreditCard
 */
 public function transformNumberToCreditCard($cardNumber)
 {
 return CreditCard::fromNumber($cardNumber);
 }
26. DevelopersParadise 2016 / Opatija / Croatia CreditCard::fromNumber($cardNumber); Named Constructor
27. DevelopersParadise 2016 / Opatija / Croatia /**
 * @Given the credit card has unlimited funds on payment gateway
 */
 public function theCreditCardHasUnlimitedFundsOnPaymentGateway()
 {
 $this->paymentGateway->cardHasUnlimitedCredit( $this->creditCard );
 }
28. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given the payment gateway has credit card payments enabled
 And I have credit card 4444333322221111 And the credit card has unlimited funds on payment gateway When I pay £42 using that credit card
 Then the payment should be accepted
29. DevelopersParadise 2016 / Opatija / Croatia Scenario: Paying with a credit card
 Given the payment gateway has credit card payments enabled
 And I have credit card 4444333322221111
 And the payment gateway has unlimited credit for that card
 When I pay £42 using that credit card
 Then the payment should be accepted
30. DevelopersParadise 2016 / Opatija / Croatia /**
 * @Given the payment gateway has unlimited credit for that card
 */
 public function thePaymentGatewayHasUnlimitedCreditForThatCard()
 {
 $this->paymentGateway->hasUnlimitedCreditFor( $this->creditCard );
 }
31. DevelopersParadise 2016 / Opatija / Croatia Code closer to the business language
32. DevelopersParadise 2016 / Opatija / Croatia Code changes when business changes
33. DevelopersParadise 2016 / Opatija / Croatia Emergent design
34. DevelopersParadise 2016 / Opatija / Croatia Decoupling
35. DevelopersParadise 2016 / Opatija / Croatia AwesomePay Magento Interfaces Interfaces Domain
36. DevelopersParadise 2016 / Opatija / Croatia AwesomePay Magento 2 Interfaces Interfaces Domain
37. DevelopersParadise 2016 / Opatija / Croatia AwesomePay Magento 2 Interfaces Interfaces Domain
38. DevelopersParadise 2016 / Opatija / Croatia AwesomePay Symfony Application Interfaces Interfaces Domain
39. DevelopersParadise 2016 / Opatija / Croatia Mitigates communication problems
40. DevelopersParadise 2016 / Opatija / Croatia Easier development
41. DevelopersParadise 2016 / Opatija / Croatia Docs for free
42. DevelopersParadise 2016 / Opatija / Croatia Test for free
43. DevelopersParadise 2016 / Opatija / Croatia Easier QA
44. DevelopersParadise 2016 / Opatija / Croatia Respond to change
45. DevelopersParadise 2016 / Opatija / Croatia Speaking by experience
46. DevelopersParadise 2016 / Opatija / Croatia How about e2e tests?
47. DevelopersParadise 2016 / Opatija / Croatia default:
 suites:
 domain:
 contexts: [DomainContext]
48. DevelopersParadise 2016 / Opatija / Croatia default:
 suites:
 domain:
 contexts: [DomainContext] 
 web:
 contexts: [WebContext]
 filters: { tags: '@web' }
49. DevelopersParadise 2016 / Opatija / Croatia default:
 suites:
 domain:
 contexts: [DomainContext] filters: { tags: '~@ui' }
 web:
 contexts: [WebContext]
 filters: { tags: '@web' }
50. DevelopersParadise 2016 / Opatija / Croatia default:
 suites:
 domain:
 contexts: [DomainContext] filters: { tags: '~@ui' }
 web:
 contexts: [WebContext]
 filters: { tags: '@web' } mobile:
 contexts: [MobileContext]
 filters: { tags: '@mobile' }
51. DevelopersParadise 2016 / Opatija / Croatia default:
 suites:
 domain:
 contexts: [DomainContext] filters: { tags: '~@ui' }
 web:
 contexts: [WebContext]
 filters: { tags: '@web' } mobile:
 contexts: [MobileContext]
 filters: { tags: '@mobile' } integration:
 contexts: [IntegrationContext]
 filters: { tags: '~@ui' }
52. DevelopersParadise 2016 / Opatija / Croatia In sum
53. DevelopersParadise 2016 / Opatija / Croatia Bounded domain
54. DevelopersParadise 2016 / Opatija / Croatia Decoupled parts of our application
55. DevelopersParadise 2016 / Opatija / Croatia Decoupling from frameworks
56. DevelopersParadise 2016 / Opatija / Croatia Better understanding of the business domain
57. DevelopersParadise 2016 / Opatija / Croatia Reduction of communication gaps
58. DevelopersParadise 2016 / Opatija / Croatia Easier development
59. DevelopersParadise 2016 / Opatija / Croatia Quicker CI builds
60. DevelopersParadise 2016 / Opatija / Croatia Easier handover
61. DevelopersParadise 2016 / Opatija / Croatia Questions? Related Links http://stakeholderwhisperer.com/posts/2014/10/introducing-modelling-by-example Introducing Modelling by Example Named Constructors in PHP http://verraes.net/2014/06/named-constructors-in-php/ Short Intro to BDD from Konstantin Kudryashov https://www.youtube.com/watch?v=njcHzGYv7nI Social Twitter: @mpmlopes
62. DevelopersParadise 2016 / Opatija / Croatia Thank You!