Presentation for Liverpool Behat UG opening

Transcript

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2. bdd
   

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4. It is a tool to bring
   a structure into
   agile processes.
   

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7. BDD
   

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8. BDD is agile
   enabler.
   

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9. is a BDD
   enabler
   

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10. How?
    

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11. Requirements
    Analysis
    Design
    Develop
    Test
    [Royce 1970]
    9 months 3 months 2 months 12 months ...
    

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12. Most of the cost
    in software
    development is in
    feedback delay
    

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13. Let’s reduce
    feedback delay
    

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14. [Beck & Cunningham 1996-99]
    Refactoring
    Code
    Test
    Requirements
    Acceptance
    

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15. Let’s rename a
    few things
    

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16. Incremental
    Design
    Implement
    Describe
    Object
    Narratives
    What do you
    mean
    [North 03]
    

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17. Incremental
    Design
    Implement
    Describe
    Object
    Narratives
    What do you
    mean
    StoryBDD
    TDD
    

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18. StoryBDD
    

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19. StoryBDD could look like functional
    TDD to people from outside BDD
    community, but it’s a lie.
    

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20. We are not testing that application
    functions as we (developers) expect it
    to, but instead we’re testing that it
    fullfils clients business needs.
    

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21. Some applications could easily fullfill
    developers expectations and still not
    being able to cover business needs.
    

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22. You might think about StoryBDD as a
    technique to teach your clients about
    testing, but in reality it's a tool to
    teach you about client business.
    

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23. Exploration
    OF Domain area
    

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24. 3 levels
    of domain
    exploration
    

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25. 1
    2
    3
    narrative
    possible scenarios
    scenario details
    

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26. Feature: Authorization
    In order to get access to the shopping history
    As a frequent buyer
    I need to be able to authenticate
    1
    2
    3
    possible scenarios
    scenario details
    

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27. Feature: Authorization
    In order to get access to the shopping history
    As a frequent buyer
    I need to be able to authenticate
    Scenario: Successfully authenticating
    with correct credentials
    1
    2
    3
    scenario details
    

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28. Feature: Authorization
    In order to get access to the shopping history
    As a frequent buyer
    I need to be able to authenticate
    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”
    1
    2
    3
    

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29. Feature: Authorization
    In order to get access to the shopping history
    As a frequent buyer
    I need to be able to authenticate
    Scenario: Successfully authenticating
    with correct credentials
    Scenario: Can not authenticate
    with wrong credentials
    Scenario: Blocked user can not
    authenticate, even
    with correct credentials
    

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30. Feature: Authorization
    In order to get access to the shopping history
    As a frequent buyer
    I need to be able to authenticate
    user
    story
    =>
    

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31. StoryBDD helps ensuring that
    development team has understanding
    of business on the same level that
    client does
    

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32. StoryBDD helps ensuring that
    development team has understanding
    of business on the same level that
    client does
    And even leveling up client
    knowledge of his business
    

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33. How?
    

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34. by Forcing you
    business
    questions
    to answer
    

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35. 1. For who?
    

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36. 1. For who?
    2. What?
    

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37. 1. For who?
    2. What?
    3. How?
    

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38. 1. For who?
    2. What?
    3. How?
    Why?
    

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39. example
    Registration
    

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40. ”
    I want visitors to be able to register
    on my website through simple
    registration form.
    Your hypothetical client
    

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41. 1.Who?
    

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42. 1.Who?
    users?
    

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43. 1.Who?
    users visitors
    

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44. 1.Who?
    users visitors
    2.Why?
    

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45. 1.Who?
    users visitors
    2.Why?
    it’s common?
    

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46. 1.Who?
    users visitors
    2.Why?
    it’s common
    buyings history
    

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47. Know
    your client
    clients!
    

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48. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    

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49. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    

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50. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    benefit
    role (benefitiar)
    

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51. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    benefit
    role (benefitiar)
    in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    

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52. in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    in order to ...
    as a ...
    i need to ...
    Feature: ...
    benefit
    role (benefitiar)
    in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    benefit
    role (benefitiar)
    SELECT f.*
    FROM ‘/features’ as f
    ORDER BY f.role, f.benefit
    LIMIT 10
    PSEUDOAgileQL
    

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53. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    

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54. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    Scenario: Successful registration
    when visitor provides
    all the required info
    

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55. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    Scenario: Successful registration
    when visitor provides
    all the required info
    Scenario: Unable to register
    when visitor misses
    required info
    

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56. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    Scenario: Successful registration
    when visitor provides
    all the required info
    Scenario: Unable to register
    when visitor misses
    required info
    Scenario: ...
    

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57. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    Scenario: Successful registration
    when visitor provides
    all the required info
    Scenario: Unable to register
    when visitor misses
    required info
    Scenario: ...
    Scenario: ...
    Scenario: ...
    Scenario: ...
    Scenario: ...
    

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58. in order to maintain my shopping history
    as a site visitor
    i need to be able to register on this site
    Feature: registration
    Scenario: Successful registration
    when visitor provides
    all the required info
    Given I am on homepage
    And I follow “sign up”
    When I fill in “email” with “linkedin@example.com”
    And I fill in “username” with “linkedin”
    And I fill in “password” with “sha1_without_salt”
    And I press “register”
    Then I should see “You have been successfully registered”
    And I should be on homepage
    

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60. $> vim composer.json
    {
    “require-dev”: {
    “behat/behat”: “~2.4.5”,
    },
    “config”: { “bin-dir”: “bin/” }
    }
    $> curl http://getcomposer.org/installer | php
    $> php composer.phar install --dev
    

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61. $> bin/behat --init
    +d features
    +d features/bootstrap
    +f features/bootstrap/FeatureContext.php
    

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62. use Behat\Behat\Context\ClosuredContextInterface,
    Behat\Behat\Context\TranslatedContextInterface,
    Behat\Behat\Context\BehatContext,
    Behat\Behat\Exception\PendingException;
    use Behat\Gherkin\Node\PyStringNode,
    Behat\Gherkin\Node\TableNode;
    class FeatureContext extends BehatContext
    {
    public function __construct(array $parameters)
    {
    // Initialize your context here
    }
    }
    

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63. $> bin/behat
    ...
    You can implement step definitions for undefined steps with these snippets:
    /**
    * @When /^I fill in “([^”]+)” with “([^”]+)”$/
    */
    public function iFillInWith($val1, $val2)
    {
    throw new PendingException();
    }
    ...
    

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64. $> bin/behat
    ...
    You can implement step definitions for undefined steps with these snippets:
    /**
    * @When /^I fill in “([^”]+)” with “([^”]+)”$/
    */
    public function iFillInWith($val1, $val2)
    {
    throw new PendingException();
    }
    ...
    

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65. $> bin/behat --append-snippets
    

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66. /**
    * @Given /^I am on homepage$/
    */
    public function iAmOnHomepage()
    {
    throw new PendingException();
    }
    /**
    * @Given /^I follow “sign up”$/
    */
    public function iFollowSignUp()
    {
    throw new PendingException();
    }
    /**
    * @When /^I fill in “([^”]+)” with “([^”]+)”$/
    */
    public function iFillInWith($val1, $val2)
    {
    throw new PendingException();
    }
    

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67. $> 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 homepage
    TODO: write pending definition
    And I follow “sign up”
    When I fill in “email” with “linkedin@example.com”
    And I fill in “username” with “linkedin”
    And I fill in “password” with “sha1_without_salt”
    And I press “register”
    Then I should see “You have been successfully registered”
    And I should be on homepage
    1 scenario (1 pending)
    8 steps (7 skipped, 1 pending)
    0m0.015s
    

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68. /**
    * @Given /^I am on homepage$/
    */
    public function iAmOnHomepage()
    {
    $crawler = new \Some\Crawler\Lib\Crawler();
    $crawler->goto(“http://localhost:8080/”);
    if (200 !== $crawler->getCurrentStatusCode())
    {
    throw new \RuntimeException(‘Can not open homepage’);
    }
    }
    

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69. $> 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 homepage
    Can not open homepage
    And I follow “sign up”
    When I fill in “email” with “linkedin@example.com”
    And I fill in “username” with “linkedin”
    And I fill in “password” with “sha1_without_salt”
    And I press “register”
    Then I should see “You have been successfully registered”
    And I should be on homepage
    1 scenario (1 failed)
    8 steps (7 skipped, 1 failed)
    0m0.015s
    

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70. $> vim src/
    

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71. Incremental
    Design
    Implement
    Describe
    Object
    Narratives
    What do you
    mean
    StoryBDD
    TDD
    

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72. $> 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 homepage
    And I follow “sign up”
    TODO: write pending definition
    When I fill in “email” with “linkedin@example.com”
    And I fill in “username” with “linkedin”
    And I fill in “password” with “sha1_without_salt”
    And I press “register”
    Then I should see “You have been successfully registered”
    And I should be on homepage
    1 scenario (1 pending)
    8 steps (1 passed, 1 pending, 6 skipped)
    0m0.015s
    

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