Story BDD with Behat

Transcript

1. Story BDD with Behat Agile Testing Days 2015
2. Saša Stamenković @umpirsky
4. KNP Labs
6. BDD
7. Bug Driven Development
8. Beer Driven Development
9. Behaviour Driven Development
10. The Problem
11. How the customer explained it.
12. How the project leader understood it.
13. How the programmer wrote it.
14. What the beta testers received.
15. How the project was documented.
16. What the customer really needed.
17. The Solution
18. Let's all use same vocabulary Developer Project manager Product owner Business analyst Tester
19. ...for planning, implementing and testing feature Developer Project manager Product owner Business analyst Tester
20. ...with the focus on the behavior of the feature Developer Project manager Product owner Business analyst Tester
21. StoryBDD helps ensuring that development team has understanding of business on the same level that client does. And even leveling up clients knowledge of his own business.
22. But how?
23. By forcing you to answer business questions.
24. Who? Who benefits from this feature?
25. What? The business value.
26. How? Feature description.
27. Gherkin
28. A structured language to describe a feature.
29. Feature: News admin panel In order to maintain a list of news As a site administrator I need to be able to edit news
30. Feature: News admin panel In order to maintain a list of news As a site administrator I need to be able to edit news custom title
31. Feature: News admin panel In order to maintain a list of news As a site administrator I need to be able to edit news business value
32. Feature: News admin panel In order to maintain a list of news As a site administrator I need to be able to edit news who benefits
33. Feature: News admin panel In order to maintain a list of news As a site administrator I need to be able to edit news feature desc.
34. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added"
35. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" scenario title
36. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" initial state
37. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" taking action
38. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" can be added to create multiple...
39. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" ...Given/When/Then
40. Scenario: Add new article Given I am on the "/admin/news" page When I click "New Article" And I fill in "Title" with "Learn BDD" And I press "Save" Then I should see "A new article was added" asserting state of the system
41. Gherkin Consistent language to describe features and their scenarios.
42. it’s something
44. Imagine that we can execute Gherkin sentences as functional tests.
45. Behat Maps each step (Gherkin sentence) to a PHP callback.
46. $ composer require behat/behat Installing Behat
47. $ php bin/behat --init +d features - place your *.feature files here +d features/bootstrap - place your context classes here +f features/bootstrap/FeatureContext.php - place your definitions, transformations and hooks here Initialization
48. I didn't write Linux using BDD.
49. But we can!
50. Feature: ls In order to see the directory structure As a UNIX user I need to be able to list directory's contents features/ls.feature
51. Scenario: List 2 files in a directory Given I have a file named "foo" And I have a file named "bar" When I run "ls" Then I should see "foo" in the output And I should see "bar" in the output features/ls.feature
52. Talk is cheap. Show me the code.
54. We can map each step to a PHP callback with Behat.
55. NOT BAD
56. Mink
57. Mink Mink is an open source browser controller/emulator for web applications.
58. One API ★ Goutte ★ Selenium ★ Zombie.js ★ ...
59. Using Mink use Behat\Mink\Session; use Behat\Mink\Driver\GoutteDriver; $session = new Session(new GoutteDriver()); $session->visit($startUrl); $session->getPage()->findLink('Downloads')->click(); echo 'Status: '.$session->getPage()->getStatusCode(); echo 'Content: '.$session->getPage()->getContent();
60. Mink inside FeatureContext.
61. Mink Extension Easy to use Mink inside FeatureContext.
62. Update dependencies { "require": { "behat/behat": "~3.0", "behat/mink-extension": "~2.0", "behat/mink-goutte-driver": "~1.0", "behat/mink-selenium2-driver": "~1.1" } }
63. Mink inside FeatureContext use Behat\MinkExtension\Context\RawMinkContext; class FeatureContext extends RawMinkContext { public function doSomething() { $this->getSession() ->visit('https://github.com/') ; } }
64. Yes, moar of that!
65. FeatureContext extends MinkContext use Behat\MinkExtension\Context\MinkContext; class FeatureContext extends MinkContext { public function doSomething() { $this->visit('/foo'); $this->selectOption('Country', 'Germany'); $this->pressButton('Save'); $this->assertPageContainsText('Country changed.'); } }
66. After adding MinkContext $ ./bin/behat -dl default | Given /^(?:|I )am on "(?P<page>[^"]+)"$/ default | When /^(?:|I )reload the page$/ default | When /^(?:|I )move backward one page$/ default | When /^(?:|I )move forward one page$/ default | When /^(?:|I )press "(?P<button>(?:[^"]|\\")*)"$/ default | When /^(?:|I )follow "(?P<link>(?:[^"]|\\")*)"$/ default | Then /^(?:|I )should be on "(?P<page>[^"]+)"$/ default | Then /^(?:|I )should see "(?P<text>(?:[^"]|\\")*)"$/ ...
67. Which means We can write functional tests without writing a single line of PHP code!
69. Feature: Search In order to find articles As a website visitor I need to be able to search for articles features/search.feature
70. Scenario: Searching for an article that exists Given I am on the homepage When I fill in "search" with "BDD" And I press "go" And I follow "Behavior-driven development" Then I should see "History" And I should see "Principles of BDD" And I should see "Story versus specification" features/search.feature
72. Scenario: Finishing my talk Given I am done with talking When I ask "Are there any questions?" Then I should see your hands in the air