
Skill
behat-skill
generate Behat BDD tests for PHP
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".
SKILL.md
Behat BDD Skill
Core Patterns
Feature File (features/login.feature)
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 "user@test.com"
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 "wrong@test.com"
And I fill in "password" with "wrong"
And I press "Login"
Then I should see "Invalid credentials"
Custom Context (features/bootstrap/LoginContext.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
# 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
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
./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
# 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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