Behat Layered Cake

Speed up Behat tests with a clever use of the layered architecture.

Transcript

1. Behat layered cake 5 Dec 2014
2. Marek Matulka @super_marek Software Engineer at SensioLabs UK Photo by @cakper
4. A project $ bin/behat -fprogress ...................................................................... 70 ...................................................................... 140 ...................................................................... 210 ...................................................................... 280 ........................................ 63 scenarios (63 passed) 320 steps (320 passed) 10m53.01s (61.38Mb)
5. That’s sloooow!
6. Should I get a faster computer? Should I get a faster computer?
7. What is the problem?
8. Where’s the problem? it takes too much time
9. Where’s the problem? Guest VM
10. Where’s the problem? MySQL
11. Where’s the problem? MySQL inside Guest VM
12. Let’s try it on the host!
13. A project $ bin/behat -fprogress ...................................................................... 70 ...................................................................... 140 ...................................................................... 210 ...................................................................... 280 ........................................ 63 scenarios (63 passed) 320 steps (320 passed) 1m15.72 (52.94Mb)
14. (63 scenarios in 320 steps) 10m53 vs 1m16
15. But!
16. But had to install PHP/mySql stack on host
17. What if... my project grows and I’ll have 3000 steps?
18. What if I had 3000 steps? 300 steps took over 10 minutes 3000 steps will take over 100 minutes! (inside guest VM)
19. What if I had 3000 steps? 300 steps took 1.5 minutes 3000 steps will take 15 minutes! (on host)
20. How to make it faster?
22. (short introduction to) Layered Architecture
23. Layered Architecture User Interface Application Domain Infrastructure
24. Dependency Inversion “High level modules should not depend on lower level implementation” – Good old Uncle Bob
25. Dependency Inversion Policy Layer <interface> Policy Service Mechanism Layer <interface> Mechanism Service Utility Layer
26. (short introduction to) Hexagonal Architecture
27. Hexagonal Architecture UI Adapter REST Adapter Data Storage Adapter External Data Adapter Domain
28. Hexagonal Architecture UI Adapter REST Adapter Data Storage Adapter Domain Internal client port external client port persistence layer port Data Provider Adapter data provider port
29. Hexagonal Architecture UI Adapter REST Adapter Test Adapter Test Adapter Data Storage Adapter Test Adapter Domain External Data Adapter Test Adapter
30. Let’s decouple!
31. Repository Interface Acme\Learning\Conference Acme\Learning\ConferenceRepository
32. Describe Communication interface ConferenceRepository { /** * @param Learner $learner * @return Conference[] */ public function findByLearner(Learner $learner); /** * @param string $conferenceId * @return Conference */ public function findOneById($conferenceId); /** * @param Conference $conference */ public function save(Conference $conference); }
33. Your controller class RegistrationController extends Controller { public function registerAction($id) { $conference = $this->getDoctrine() ->getRepository(‘AcmeConferenceBundle:Conference’) ->find($id); if ($this->get(‘acme_conference.enrolment.service’) ->enrol($conference, $this->getUser())) { $this->get(‘acme_conference.notification.service’) ->notify($this->getUser(), ‘success’); $this->redirect(‘registration_successful’) } $this->redirect(‘registration_failed’); } }
34. Spec Controller to use Interface class RegistrationController { private $repository; public function __construct(ConferenceRepository $repository) { $this->repository = $repository; } public function registerAction($id) { $conference = $this->repository->findOneById($id); ... } }
35. Implement your repository namespace Acme\DoctrineAdapter\Repository; class DoctrineConferenceRepository extends EntityRepository implements ConferenceRepository { ... public function findOneById($id) { return parent::find($id); } public function save(Conference $conference) { $this->getEntityManager()->persist($conference); $this->getEntityManager()->flush(); } }
36. Register repository as a Service! // Acme\DoctrineAdapter\Resources\mapping\Learning.Conference.orm.xml <entity name="Acme\Learning\Conference" repository-class="Acme\DoctrineAdapter\DoctrineConferenceRepository" table="conferences"> // Acme\Application\LearningBundle\Resources\config\services.xml <service id="rechannel.brand.repository" class="Doctrine\ORM\EntityManager" factory-service="doctrine.orm.entity_manager" factory-method="getRepository"> <argument>Acme\Learning\Conference</argument> </service>
37. Add another Adapter
38. Implement your repository namespace Acme\TestInfrastructure\Repository; class FilesystemConferenceRepository extends FilesystemCollection implements ConferenceRepository { public function findOneById($id) { return parent::load($id); } public function save(Conference $conference) { parent::add($conference, $conference->getId()); } }
39. Register repository as a Service! // Acme\Application\LearningBundle\Resources\config\filesystem_services.xml <service id="acme.conference.repository" alias="acme.brand.repository.filesystem" /> <service id="acme.conference.repository.filesystem" class="Acme\TestInfrastructure\Repository\FilesystemConferenceRepository"> </service>
40. Configure the Test env
41. Prepare Test Infrastructure config_test.yml: parameters: acme.data_source: filesystem
42. Configure dependency injection class LearningExtension extends Extension { public function load(array $configs, ContainerBuilder $container) { $configuration = new Configuration(); $this->processConfiguration($configuration, $configs); $loader = new Loader\XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config')); $loader->load('services.xml'); if ($container->getParameter('acme.data_source') === 'filesystem') { $loader->load('filesystem_repositories.xml'); } } }
43. How fast can it be?
44. MySql Inside Guest VM 63 scenarios (63 passed) 320 steps (320 passed) 10m53.01s (61.38Mb)
45. MySql On Host 63 scenarios (63 passed) 320 steps (320 passed) 1m15.72s (52.94Mb)
46. Mocked Storage Inside Guest VM 313 scenarios (313 passed) 3574 steps (3574 passed) 9m24.51s (55.64Mb)
47. Mocked Storage On Host 313 scenarios (313 passed) 3574 steps (3574 passed) 1m2.96s (38.09Mb)
48. But! my application uses external services...
49. Hexagonal Architecture UI Adapter REST Adapter Test Adapter Test Adapter Data Storage Adapter Test Adapter Domain External Data Adapter Test Adapter
50. Solution build an abstraction layer: adapter
51. Solution build a test adapter to mock external service
52. Demo
53. Questions?
54. Thank you! https://speakerdeck.com/super_marek @super_marek