Page Object Extension Laravel Package

Getting Started

Minimal Steps

1. Installation:

   composer require --dev friends-of-behat/page-object-extension behat/behat
   

2. Configure Behat (behat.yml):

   default:
     extensions:
       FriendsOfBehat\PageObjectExtension:
         alias: PageObject
   

3. Create a Basic Page Class (src/Tests/Behat/Page/HomePage.php):

   namespace Tests\Behat\Page;
   
   use FriendsOfBehat\PageObjectExtension\Page\Page;
   
   class HomePage extends Page
   {
       public static $url = '/';
   
       public function getTitle(): string
       {
           return $this->getDriver()->getTitle();
       }
   }
   

4. Use in a Feature Context (src/Tests/Behat/Context/FeatureContext.php):

   use FriendsOfBehat\PageObjectExtension\Page\Page;
   use Behat\Behat\Context\Context;
   use Tests\Behat\Page\HomePage;
   
   class FeatureContext implements Context
   {
       private HomePage $homePage;
   
       public function __construct(HomePage $homePage)
       {
           $this->homePage = $homePage;
       }
   
       /**
        * @When I visit the homepage
        */
       public function iVisitTheHomepage()
       {
           $this->homePage->open();
       }
   
       /**
        * @Then I should see the title :title
        */
       public function iShouldSeeTheTitle(string $title)
       {
           expect($this->homePage->getTitle())->toBe($title);
       }
   }
   

5. Run Behat:

   vendor/bin/behat
   

First Use Case

Scenario: Test a simple homepage title. File: features/homepage.feature

Feature: Homepage
  As a visitor
  I want to see the correct title
  So I know I'm on the right site

  Scenario: Homepage displays correct title
    Given I am on the homepage
    Then I should see the title "Welcome to Our Site"

Implementation Patterns

Core Workflows

1. Page Object Pattern

• Pages: Represent entire screens or sections (e.g., DashboardPage, CheckoutPage).

  class DashboardPage extends Page
  {
      public static $url = '/dashboard';
      public $title = 'Dashboard';
  
      public function getWelcomeMessage(): string
      {
          return $this->getDriver()->find('css', '.welcome-message')->getText();
      }
  }
  

• Elements: Represent reusable UI components (e.g., buttons, forms).

  class LoginForm extends Element
  {
      public function fillEmail(string $email): void
      {
          $this->fillField('email', $email);
      }
  
      public function fillPassword(string $password): void
      {
          $this->fillField('password', $password);
      }
  }
  

• Composition: Embed elements in pages.

  class LoginPage extends Page
  {
      public static $url = '/login';
      public LoginForm $form;
  
      public function __construct()
      {
          $this->form = new LoginForm($this->getDriver());
      }
  }
  

2. Symfony Integration (Adapted for Laravel)

Use SymfonyPage as a base for Laravel-specific pages by overriding Symfony dependencies:

class LaravelPage extends SymfonyPage
{
    protected function getUrl(): string
    {
        return route($this->getRouteName());
    }

    protected function getParameter(string $name)
    {
        return app($name); // Laravel's container
    }
}

3. Dependency Injection

Leverage Laravel’s service container to inject dependencies:

class FeatureContext
{
    public function __construct(
        HomePage $homePage,
        AuthService $authService // Laravel service
    ) {
        $this->homePage = $homePage;
        $this->authService = $authService;
    }
}

4. Dynamic Selectors

Use methods to generate selectors dynamically:

class UserProfilePage extends Page
{
    public function getUserNameField(): Element\Field
    {
        return $this->find('css', '.user-name', Element\Field::class);
    }
}

5. Reusable Steps

Extract common steps into context methods:

class CommonStepsContext
{
    /**
     * @Given I am logged in as :user
     */
    public function iAmLoggedInAs(string $user)
    {
        $this->authService->login($user);
    }
}

Integration Tips

1. Laravel-Specific URL Handling: Override getUrl() to use Laravel’s route() helper:

   class AdminPage extends LaravelPage
   {
       protected function getRouteName(): string
       {
           return 'admin.dashboard';
       }
   }
   

2. Element Locators: Use Laravel’s Blade directives or custom logic for dynamic IDs:

   public function getDynamicElement(): Element\Button
   {
       return $this->find('css', '.btn[data-id="' . $this->getDynamicId() . '"]', Element\Button::class);
   }
   

3. Test Data Setup: Use Laravel factories or seeders to populate test data:

   /**
    * @BeforeScenario
    */
   public function createTestUser()
   {
       User::factory()->create(['email' => 'test@example.com']);
   }
   

4. Parallel Testing: Configure Behat for parallel execution:

   # behat.yml
   default:
     extensions:
       Behat\MinkExtension:
         base_url: 'http://localhost'
       FriendsOfBehat\PageObjectExtension:
         alias: PageObject
       Behat\ParallelExtension:
         workers: 4
   

5. CI/CD Optimization: Cache dependencies and use Laravel’s queue workers for background jobs during tests.

Gotchas and Tips

Pitfalls

1. Symfony Dependencies in Laravel:

   • Issue: SymfonyPage relies on Symfony’s ContainerInterface. Laravel’s container is compatible but may throw errors for Symfony-specific methods.
   • Fix: Extend SymfonyPage and override unsupported methods:

     class LaravelPage extends SymfonyPage
     {
         protected function getParameter(string $name)
         {
             return app($name); // Laravel's container
         }
     }
     

2. Route Resolution:

   • Issue: Laravel’s route() helper may not work in Behat’s context if the app isn’t bootstrapped.
   • Fix: Manually resolve routes or use Laravel’s UrlGenerator:

     $url = app('url')->route('admin.dashboard');
     

3. Driver Initialization:

   • Issue: Mink drivers (e.g., Selenium) may not auto-initialize in Laravel’s context.
   • Fix: Explicitly configure the driver in behat.yml:

     default:
       extensions:
         Behat\MinkExtension:
           base_url: 'http://localhost'
           sessions:
             default:
               selenium2: ~
     

4. Static $url Conflicts:

   • Issue: Hardcoded $url in pages may break if routes change.
   • Fix: Use dynamic URL generation:

     class DynamicPage extends Page
     {
         public static function getUrl(): string
         {
             return route('dynamic.route', ['param' => 'value']);
         }
     }
     

5. Element Not Found:

   • Issue: Flaky tests due to elements not being found.
   • Fix: Use explicit waits or retry logic:

     public function assertElementExists(): void
     {
         $this->waitFor(5)->until(
             fn() => $this->getDriver()->find('css', '.element') !== null
         );
     }
     

6. Dependency Injection in Contexts:

   • Issue: Behat may not resolve Laravel services in contexts.
   • Fix: Use Behat’s setService() or bind services in behat.yml:

     default:
       extensions:
         FriendsOfBehat\PageObjectExtension:
           alias: PageObject
           services:
             auth_service: '@authService' # Laravel service
     

Debugging Tips

1. Enable Mink Debugging:

   # behat.yml
   default:
     extensions:
       Behat\MinkExtension:
         debug: true
   

   • Outputs Mink session details for troubleshooting.

2. Log Page/Element Interactions: Add debug methods to pages/elements:

   public function debugElement(string $selector): void
   {
       $element = $this->getDriver()->find('css', $selector);
       \Behat\Behat\Hook\Scope\BeforeScenarioScope::log("Element found: " . (bool) $element);
   }
   

3. Use Behat’s --verbose Flag:

   vendor/bin/behat