Writing unit tests for custom generators and types

[LeoAdamek]

My application makes use of a custom id type which maps to a time-based identity, it also makes use of a custom generator for these values. What's the best way to write tests for this? e.g. Initializing the EntityManager etc (within Symfony Flex.)

namespace App\Tests\Support\Database\Identity;


use App\Support\Database\Identity\Type;
use Doctrine\DBAL\Platforms\PostgreSQL100Platform;
use PHPUnit\Framework\TestCase;

final class TypeTests extends TestCase
{

    public function testGetSqlDeclaration(): void
    {
        $type = new Type();
        $this->assertEquals('ksuid', $type->getSQLDeclaration([], new PostgreSQL100Platform()));
    }


}

This works well enough to handle the SQL declaration, but to test serialization and deserialization of DB values, or the ID generator which needs an active EntityManager, how would I approach this?

[beberlei]

For an integration test, Use the KernelTestCase from Symfony and fetch the entity manager service from the container.

[LeoAdamek]

Thanks, using KernelTestCase to have a container to get the service from was exactly what I needed.