Drupal Kernel Tests

When to Use

• Testing services that interact with Drupal's service container
• Database operations and entity CRUD
• Hook implementations
• Config operations
• Tests needing a real database but not a full browser

Basic Structure

// tests/src/Kernel/MyServiceTest.php
namespace Drupal\Tests\my_module\Kernel;

use Drupal\KernelTests\KernelTestBase;
use Drupal\node\Entity\Node;
use Drupal\node\Entity\NodeType;