createTestConfiguration example

private const EM_NAME = 'foo';

    protected ?ObjectManager $em;
    protected ManagerRegistry $registry;
    protected MockObject&EntityRepository $repository;
    protected TestRepositoryFactory $repositoryFactory;

    protected function setUp(): void
    {
        $this->repositoryFactory = new TestRepositoryFactory();

        $config = DoctrineTestHelper::createTestConfiguration();
        $config->setRepositoryFactory($this->repositoryFactory);

        if (!Type::hasType('string_wrapper')) {
            Type::addType('string_wrapper', StringWrapperType::class);
        }

        $this->em = DoctrineTestHelper::createTestEntityManager($config);
        $this->registry = $this->createRegistryMock($this->em);
        $this->createSchema($this->em);

        parent::setUp();
    }

public static function createTestEntityManager(Configuration $config = null): EntityManager
    {
        if (!\extension_loaded('pdo_sqlite')) {
            TestCase::markTestSkipped('Extension pdo_sqlite is required.');
        }

        $params = [
            'driver' => 'pdo_sqlite',
            'memory' => true,
        ];

        $config ??= self::createTestConfiguration();
        $eventManager = new EventManager();

        return new EntityManager(DriverManager::getConnection($params, $config, $eventManager), $config, $eventManager);
    }

    public static function createTestConfiguration(): Configuration
    {
        $config = ORMSetup::createConfiguration(true);
        $config->setEntityNamespaces(['SymfonyTestsDoctrine' => 'Symfony\Bridge\Doctrine\Tests\Fixtures']);
        $config->setAutoGenerateProxyClasses(true);
        $config->setProxyDir(sys_get_temp_dir());