Mocks, Stubs, Tests

Transcript

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4. L’instant quizz
   

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5. Qui a déjà écrit
   des tests ?
   

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6. Qui a déjà utilisé
   PHPUnit ?
   

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7. Qui a déjà mocké
   une classe ?
   

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8. Séance de gym terminée.
   Merci
   

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11. •
    

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    Le format des tests dépend du sujet
    

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15. Quand je casserais quelque chose
    Elle ne me ralentira pas dans mon travail
    Le code coverage sera de 100%
    

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16. Quand je casserais quelque chose
    Elle ne me ralentira pas dans mon travail
    Le code coverage sera de 100%
    

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18. 22,4% 97%
    42%
    Pas bien Bien
    

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19. 22,4% 97%
    42%
    Pas bien Bien
    

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20. •
    

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22. •
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24. class PHPTour
    {
    public $totalCost;
    public $attendees;
    public function getPlacePrice()
    {
    return $this->totalCost / $this->attendees;
    }
    }
    

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25. class PHPTourTest extends PHPUnit_Framework_TestCase
    {
    public function testForCoverage()
    {
    $tour = new PHPTour();
    $tour->totalCost = 40000;
    $tour->attendees = 100;
    $this->assertEquals(400, $tour->getPlacePrice());
    }
    }
    

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26. class PHPTourTest extends PHPUnit_Framework_TestCase
    {
    public function testForCoverage()
    {
    $tour = new PHPTour();
    $tour->totalCost = 40000;
    $tour->attendees = 100;
    $this->assertEquals(400, $tour->getPlacePrice());
    }
    }
    

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27. $tour->attendees = 0;
    

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28. $tour->attendees = 0;
    Division par zéro
    

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31. class CodeCoverage
    {
    private $field1;
    // …
    private $fieldN;
    // …
    private $field30;
    // Powerpoint coding standards
    public function setFieldN($n) { $this->fieldn = $n; }
    public function getFieldN() { return $this->fieldN; }
    }
    

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32. class CodeCoverage
    {
    // …
    public function compute()
    {
    $troll = $field1 * $field2 / (($field3 * $field4) * $field5) *
    $field6 / $field7 * $field8;
    $troll2 = $field9 * $field10 / cos($field11);
    $troll3 = $field12 * tan($field13);
    return $troll * log($troll2) / sin($troll3) * $field14 /*
    (;;)(^_^)(;;) */;
    }
    }
    

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33. class CodeCoverageTest extends PHPUnit_Framework_TestCase
    {
    public function testSetField1AndGetField1ReturnsCorrectValue()
    {
    $cc = new CodeCoverage();
    $cc->setField1(’fuu');
    $this->assertEquals(’fuu', $cc->getField1());
    }
    // repeat for each fields
    }
    

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40. // Insert your code here
    

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41. class Car
    {
    public function __construct()
    {
    $this->engine = new Engine();
    }
    }
    

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42. class Car
    {
    public function __construct()
    {
    $this->engine = new Engine();
    }
    }
    

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43. class Car
    {
    public function __construct(EngineInterface $engine)
    {
    $this->engine = $engine;
    }
    }
    

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44. class Car
    {
    public function __construct(EngineInterface $engine)
    {
    $this->engine = $engine;
    }
    }
    

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45. class SausageShop
    {
    public function serve()
    {
    $sausage =
    SausageFactory::getNewSausage();
    $bread =
    BreadFactory::getNewBread();
    return
    $bread->upgradeWith($sausage);
    }
    }
    

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46. class SausageShop
    {
    public function serve()
    {
    $sausage =
    SausageFactory::getNewSausage();
    $bread =
    BreadFactory::getNewBread();
    return
    $bread->upgradeWith($sausage);
    }
    }
    

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47. class SausageShop
    {
    public function __construct(
    SausageFactory $sausageFactory,
    BreadFactory $breadFactory )
    {
    $this->sausageFactory = $sausageFactory;
    $this->breadFactory = $breadFactory;
    }
    public function serve()
    {
    $sausage =
    $this->sausageFactory->getNewSausage();
    $bread =
    $this->breadFactory->getNewBread();
    return $bread->upgradeWith($sausage);
    }
    }
    

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48. class SausageShop
    {
    public function __construct(
    SausageFactory $sausageFactory,
    BreadFactory $breadFactory )
    {
    $this->sausageFactory = $sausageFactory;
    $this->breadFactory = $breadFactory;
    }
    public function serve()
    {
    $sausage =
    $this->sausageFactory->getNewSausage();
    $bread =
    $this->breadFactory->getNewBread();
    return $bread->upgradeWith($sausage);
    }
    }
    

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49. class Customer
    {
    public function orderBeer()
    {
    $url = 'http://waiter/bring-me-a-
    beer/erdinger';
    return file_get_contents($url);
    }
    }
    

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50. class Customer
    {
    public function orderBeer()
    {
    $url = 'http://waiter/bring-me-a-
    beer/erdinger';
    return file_get_contents($url);
    }
    }
    

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51. class Customer
    {
    public function orderBeer(
    WaiterApi $api)
    {
    return $api->bring(‘erdinger’);
    }
    }
    

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52. class Customer
    {
    public function orderBeer(
    WaiterApi $api)
    {
    return $api->bring(‘erdinger’);
    }
    }
    

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53. Design by contract
    

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54. SINGLETONS
    

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59. abstract class BaseMedia
    {
    const TYPE_IMAGE;
    abstract public function getFile();
    public function getType() {
    switch (get_extension($this->getFile()))
    {
    case 'png‘:
    return self::TYPE_IMAGE;
    }
    }
    

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60. abstract class BaseMedia
    {
    const TYPE_IMAGE;
    abstract public function getFile();
    public function getType() {
    switch (get_extension($this->getFile()))
    {
    case 'png‘:
    return self::TYPE_IMAGE;
    }
    }
    

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61. Interface MediaInterface
    {
    const TYPE_IMAGE;
    public function getType();
    }
    

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    Les mocks/stubs à notre secours !
    

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70. JIHANE MOSSALIM
    

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71. •
    

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72. class MyClassTest extends PHPUnit_Framework_TestCase
    {
    public function testFoo()
    {
    $engine = $this->getMock('Engine');
    $car = new Car($engine);
    }
    }
    Tous les appels à Engine
    renverront « null »
    En fait…
    c‘est un stub
    

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74. // ...
    $engine = $this->getMock('Engine');
    $engine
    ->expects($this->once())
    ->method(‘start‘)
    ->will($this->returnValue(true))
    ;
    Un contrat est établi
    C’est un mock,
    un vrai
    

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75. • $mock
    • ->expects(…)
    • ->method('name')
    • ->with(…)
    • ->will(…)
    

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76. expects(PHPUnit_…_Matcher_Invocation)
    $this->exactly($n)
    $this->never()
    $this->any()
    $this->atLeastOnce()
    

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77. with(PHPUnit_Framework_Constraint)
    $this->exactly($n)
    $this->arrayHasKey ('...')
    $this->any()
    

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78. will(PHPUnit_Framework_MockObject_Stub)
    $this->returnValue($value)
    $this->returnArgument($n)
    $this->returnCallback($c)
    $this->throwException($e)
    $this->onConsecutiveCalls(1, 2, 3)
    

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80. namespace Sensio\Bundle\PlatformBundle\OAuth;
    use Symfony\Component\HttpFoundation\Session;
    class OAuthClient
    {
    // … properties declaration …
    public function __construct($serviceName, \OAuth $oauth, $endPoint, $authorizeUri,
    $requestTokenUri, $accessTokenUri, Session $session = null)
    {
    $this->serviceName = $serviceName;
    $this->oauth = $oauth;
    $this->endPoint = $endPoint;
    $this->authorizeUri = $authorizeUri;
    $this->requestTokenUri = $requestTokenUri;
    $this->accessTokenUri = $accessTokenUri;
    $this->session = $session;
    $this->sessionOAuthTokenName = sprintf('oauth/_%s.oauth_token',
    $this->serviceName);
    $this->sessionOAuthTokenSecretName = sprintf('oauth/_%s.oauth_token_secret',
    $this->serviceName);
    }
    // … other methods …
    

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81. public function getRequestToken($redirectUri = null)
    {
    if ($this->session) {
    $this->session->remove($this->sessionOAuthTokenName);
    $this->session->remove($this->sessionOAuthTokenSecretName);
    }
    $requestToken = $this->oauth->getRequestToken(
    $this->requestTokenUri,
    $redirectUri);
    if ($requestToken === false) {
    throw new \OAuthException('Failed fetching request token,
    response was: ’
    .$this->oauth->getLastResponse());
    }
    if ($this->session) {
    $this->session->set($this->sessionOAuthTokenName,
    $requestToken['oauth_token']);
    $this->session->set($this->sessionOAuthTokenSecretName,
    $requestToken['oauth_token_secret']);
    }
    return $requestToken;
    }
    

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82. public function retrieveAccessToken($oauthSessionHandle = '', $verifierToken)
    {
    if ($this->session) {
    if (($token = $this->session->get($this->sessionOAuthTokenName))
    && ($tokenSecret = $this->session->get(
    $this->sessionOAuthTokenSecretName))
    ) {
    $this->oauth->setToken($token, $tokenSecret);
    }
    }
    $response = $this->oauth->getAccessToken($this->accessTokenUri,
    $oauthSessionHandle,
    $verifierToken);
    if (false === $response) {
    throw new \OAuthException('Failed fetching access token, response was: '.
    $this->oauth->getLastResponse());
    }
    return $response;
    }
    }
    

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83. public function setToken($token, $tokenSecret)
    {
    $this->oauth->setToken($token, $tokenSecret);
    }
    public function get($path)
    {
    $url = sprintf('%s/%s', $this->endPoint, ltrim($path, '/'));
    $state = $this->oauth->fetch($url);
    if (!$state) {
    throw new \RuntimeException(sprintf(Can\’t fetch resource %s',
    $url));
    }
    return $this->oauth->getLastResponse();
    }
    

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85. class myTest extends PHPUnit_Framework_TestCase {
    public function testGetRequestToken() {
    $oauth = $this->getMock('OAuth');
    $oauth
    ->expects($this->once())
    ->method('getRequestToken')
    ->will($this->returnValue('ok'))
    ;
    $client = new OAuthClient(
    'foo', $oauth,
    'bar', 'bar', 'bar', 'bar', 'bar');
    $this->assertEquals('ok', $client->getRequestToken());
    }
    }
    

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86. class myTest extends PHPUnit_Framework_TestCase {
    /** @expectedException LogicException */
    public function testGetRequestTokenWithError() {
    $oauth = $this->getMock('OAuth');
    $oauth
    ->expects($this->once())
    ->method('getRequestToken')
    ->will($this->returnValue(false));
    $client = new OAuthClient('foo',
    $oauth,
    'bar', 'bar', 'bar', 'bar', 'bar');
    $client->getRequestToken();
    }
    }
    

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88. Questions?
    

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