Behat BDD Skill

Description

--- name: behat-skill description: > Generates Behat BDD tests for PHP with Gherkin feature files and MinkContext for browser testing. Use when user mentions "Behat", "PHP BDD", "Mink", "behat.yml". Triggers on: "Behat", "PHP BDD", "Mink", "behat.yml", "FeatureContext PHP". languages: - PHP category: bdd-testing license: MIT metadata: author: TestMu AI version: "1.0" --- # Behat BDD Skill ## Core Patterns ### Feature File (features/login.feature) ```gherkin Feature: User Login As a user I want to log in Scenario: Successful login Given I am on "/login" When I fill in "email" with "[email protected]" And I fill in "password" with "password123" And I press "Login" Then I should see "Dashboard" And I should be on "/dashboard" Scenario: Invalid credentials Given I am on "/login" When I fill in "email" with "[email protected]" And I fill in "password" with "wrong" And I press "Login" Then I should see "Invalid credentials" ``` ### Custom Context (features/bootstrap/LoginContext.php) ```php <?php use Behat\MinkExtension\Context\MinkContext; use Behat\Behat\Context\Context; class LoginContext extends MinkContext implements Context { /** * @When I login as :email with password :password */ public function iLoginAs(string $email, string $password): void { $this->visit('/login'); $this->fillField('email', $email); $this->fillField('password', $password); $this->pressButton('Login'); } /** * @Then I should see the dashboard */ public function iShouldSeeTheDashboard(): void { $this->assertSession()->addressEquals('/dashboard'); $this->assertSession()->pageTextContains('Welcome'); } /** * @Then the response time should be under :ms milliseconds */ public function responseUnder(int $ms): void { // Custom performance assertion } } ``` ### Built-in MinkContext Steps ```gherkin # Navigation Given I am on "/path" When I go to "/path" When I reload the page # Forms When I fill in "field" with "value" When I select "option" from "select" When I check "checkbox" When I uncheck "checkbox" When I press "button" When I attach the file "path" to "field" # Assertions Then I should see "text" Then I should not see "text" Then I should be on "/path" Then the response status code should be 200 Then the "field" field should contain "value" Then I should see an "css-selector" element Then print current URL ``` ### behat.yml ```yaml default: suites: default: contexts: - LoginContext - Behat\MinkExtension\Context\MinkContext extensions: Behat\MinkExtension: base_url: 'http://localhost:3000' sessions: default: selenium2: browser: chrome wd_host: 'http://localhost:4444/wd/hub' ``` ### Tags ```bash ./vendor/bin/behat --tags=@smoke ./vendor/bin/behat --tags="@smoke&&~@slow" ``` ## Setup: `composer require --dev behat/behat behat/mink-extension behat/mink-selenium2-driver` ## Init: `./vendor/bin/behat --init` ### Cloud Execution on TestMu AI Set environment variables: `LT_USERNAME`, `LT_ACCESS_KEY` ```yaml # behat.yml default: extensions: Behat\MinkExtension: base_url: 'https://your-app.com' selenium2: wd_host: 'https://hub.lambdatest.com/wd/hub' capabilities: browser: 'chrome' extra_capabilities: 'LT:Options': user: '%env(LT_USERNAME)%' accessKey: '%env(LT_ACCESS_KEY)%' build: 'Behat Build' name: 'Behat Test' platformName: 'Windows 11' video: true console: true network: true ``` ## Run: `./vendor/bin/behat` or `./vendor/bin/behat features/login.feature` ## Deep Patterns See `reference/playbook.md` for production-grade patterns: | Section | What You Get | |---------|-------------| | §1 Project Setup | behat.yml with suites, Mink extension, profiles, project structure | | §2 Feature Files | Gherkin with Scenario Outline, Background, TableNode data | | §3 Context Classes | Step definitions, dependency injection, API context, assertions | | §4 Hooks | BeforeSuite/Scenario/Step, screenshot on failure, transaction rollback | | §5 Page Objects | Page Object pattern with elements map, reusable components | | §6 LambdaTest Integration | Remote Selenium config, cloud browser profiles | | §7 Custom Formatters | HTML report formatter, result collection | | §8 CI/CD Integration | GitHub Actions with MySQL, Selenium, JUnit reports | | §9 Debugging Table | 12 common problems with causes and fixes | | §10 Best Practices | 14-item BDD testing checklist |

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