php_repo.php

<?php

// Entity

/**
 * @ORM\Repository(DoctrinePricesRepository::class)
 */
class Price {

    public function __construct(
        /**
         * @ORM\Column(type="integer)
         */
        public int $value
    ) {}
}

// REpository
interface PricesRepository
{
    public function findOneByThing(int $value): ?Price;
}

// configured as PricesRepository in `services.yaml`
class DoctrinePricesRepository extends ServiceEntityRepository implements PricesRepository
{
    public function __construct(Manager $manager) {
        parent::__construct($manager, Price::class);
    }
    public function findOneByThing(int $value): ?Price
    {
        return $this->entityManager->findOneBy(['value' => $value]);
    }
}

// Only used in tests
class MemoryPricesRepository implements PricesRepository
{
    public function __construct(private array $prices) {}

    public function findOneByThing(int $value): ?Price
    {
        foreach($this->prices as $price) {
            if($price->value === $value) {
                return $price;
            }
        }
        return null;
    }
}


class PricesControllerTest extends KerneltestCase
{
    public function testGetFilteredPricesByPage(): void
    {
        $repository = new MemoryPricesRepository([new Price(1), new Price(2)]);
        $data = $repository->findOneByThing(1);

        // Price 1
        dd($data);
    }
}