Drupal Test-Driven Development

Drupal 11.x | PHPUnit 10.5+

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Task	Guide
Choose the right test type	Test Type Decision Matrix
Apply RED-GREEN-REFACTOR cycle	TDD Workflow: RED-GREEN-REFACTOR
Set up PHPUnit configuration	PHPUnit Configuration
Write a unit test	Unit Tests with UnitTestCase
Write a kernel test	Kernel Tests with KernelTestBase
Write a browser test	Browser Tests with BrowserTestBase
Write a JavaScript test	JavaScript Tests with WebDriverTestBase
Use test traits	Test Traits & Utilities
Create a test module	Test Modules
Test a service	Testing Services
Test a plugin	Testing Plugins
Test a form	Testing Forms
Test entities	Testing Entities
Test permissions	Testing Access & Permissions
Test routes/controllers	Testing Routes & Controllers
Test configuration	Testing Configuration
Test events/hooks	Testing Events & Hooks
Apply TDD to Drupal modules	Spec-Driven Drupal Development
Test JavaScript with Nightwatch	Nightwatch.js Testing
Run tests	Running Tests
Measure code coverage	Coverage Metrics Strategy
Set up quality gates	Quality Gates & Audit Checklist
Follow best practices	Best Practices & Patterns
Avoid common mistakes	Anti-Patterns & Common Mistakes
Find test resources	Code Reference Map