Story BDD with Behat

Transcript

1. Story BDD with Behat
   Agile Testing Days 2015
   

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2. Saša Stamenković
   @umpirsky
   

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4. KNP Labs
   

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6. BDD
   

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7. Bug Driven Development
   

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8. Beer Driven Development
   

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9. Behaviour Driven Development
   

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10. The Problem
    

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11. How the customer explained it.
    

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12. How the project leader understood it.
    

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13. How the programmer wrote it.
    

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14. What the beta testers received.
    

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15. How the project was documented.
    

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16. What the customer really needed.
    

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17. The Solution
    

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18. Let's all use same vocabulary
    Developer Project manager Product owner Business analyst Tester
    

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19. ...for planning, implementing and testing feature
    Developer Project manager Product owner Business analyst Tester
    

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20. ...with the focus on the behavior of the feature
    Developer Project manager Product owner Business analyst Tester
    

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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.
    

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22. But how?
    

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23. By forcing you to answer
    business questions.
    

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24. Who?
    Who benefits
    from this feature?
    

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25. What?
    The business
    value.
    

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26. How?
    Feature description.
    

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27. Gherkin
    

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28. A structured language to
    describe a feature.
    

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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
    

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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
    

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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
    

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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
    

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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.
    

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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"
    

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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
    

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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
    

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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
    

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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...
    

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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
    

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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
    

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41. Gherkin
    Consistent language to describe
    features and their scenarios.
    

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42. it’s something
    

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44. Imagine that we can execute
    Gherkin sentences as functional
    tests.
    

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45. Behat
    Maps each step (Gherkin
    sentence) to a PHP callback.
    

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46. $ composer require behat/behat
    Installing Behat
    

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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
    

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48. I didn't write
    Linux using BDD.
    

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49. But we can!
    

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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
    

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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
    

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52. Talk is cheap.
    Show me the
    code.
    

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54. We can map each step to a PHP
    callback with Behat.
    

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55. NOT BAD
    

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56. Mink
    

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57. Mink
    Mink is an open source browser
    controller/emulator for web
    applications.
    

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58. One API
    ★ Goutte
    ★ Selenium
    ★ Zombie.js
    ★ ...
    

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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();
    

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60. Mink inside
    FeatureContext.
    

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61. Mink Extension
    Easy to use Mink inside
    FeatureContext.
    

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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"
    }
    }
    

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63. Mink inside FeatureContext
    use Behat\MinkExtension\Context\RawMinkContext;
    class FeatureContext extends RawMinkContext
    {
    public function doSomething()
    {
    $this->getSession()
    ->visit('https://github.com/')
    ;
    }
    }
    

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64. Yes, moar of that!
    

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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.');
    }
    }
    

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66. After adding MinkContext
    $ ./bin/behat -dl
    default | Given /^(?:|I )am on "(?P[^"]+)"$/
    default | When /^(?:|I )reload the page$/
    default | When /^(?:|I )move backward one page$/
    default | When /^(?:|I )move forward one page$/
    default | When /^(?:|I )press "(?P(?:[^"]|\\")*)"$/
    default | When /^(?:|I )follow "(?P(?:[^"]|\\")*)"$/
    default | Then /^(?:|I )should be on "(?P[^"]+)"$/
    default | Then /^(?:|I )should see "(?P(?:[^"]|\\")*)"$/
    ...
    

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67. Which means
    We can write functional tests
    without writing a single line of
    PHP code!
    

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69. Feature: Search
    In order to find articles
    As a website visitor
    I need to be able to search for articles
    features/search.feature
    

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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
    

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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
    

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