The class Mock_* was not found in the chain configured namespaces App\Entity [Symfony 5.3][PHPUnit 8.5] - symfony

Question

I am trying to write PHPUnit tests for my Symfony 5.3 project with some Repositories mocked with others real.
$ bin/console -v
Symfony 5.3.10 (env: dev, debug: true)
$ bin/phpunit -V
PHPUnit 8.5.19 by Sebastian Bergmann and contributors.
Doctrine\Persistence\Mapping\MappingException: The class 'Mock_SType_b1b7aee4' was not found in the chain configured namespaces App\Entity
/var/www/cir/vendor/doctrine/persistence/lib/Doctrine/Persistence/Mapping/MappingException.php:23
/var/www/cir/vendor/doctrine/persistence/lib/Doctrine/Persistence/Mapping/Driver/MappingDriverChain.php:91
/var/www/cir/vendor/doctrine/doctrine-bundle/Mapping/MappingDriver.php:45
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php:156
/var/www/cir/vendor/doctrine/doctrine-bundle/Mapping/ClassMetadataFactory.php:19
/var/www/cir/vendor/doctrine/persistence/lib/Doctrine/Persistence/Mapping/AbstractClassMetadataFactory.php:382
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php:85
/var/www/cir/vendor/doctrine/persistence/lib/Doctrine/Persistence/Mapping/AbstractClassMetadataFactory.php:251
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php:293
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php:1789
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php:1764
/var/www/cir/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php:629
/var/www/cir/src/Component/User/UserManager.php:1059
/var/www/cir/src/Component/User/UserManager.php:383
/var/www/cir/tests/Component/User/Manager/Creation/ATCPTest.php:146
I have created a KernelTestCase where:
$sTypeRepository = $this->createStub(STypeRepository::class);
So I tried to use the actual Repository:
$sTypeRepository = static::getContainer()->get('doctrine')->getRepository(SType::class);
and I get error:
TypeError: Argument 2 passed to App\Component\User\UserManager::__construct() must be an instance of App\Repository\STypeRepository, instance of Doctrine\ORM\EntityRepository given, called in /var/www/cir/tests/Component/User/Manager/Creation/ATCPTest.php on line 122
/var/www/cir/src/Component/User/UserManager.php:214
/var/www/cir/tests/Component/User/Manager/Creation/ATCPTest.php:122
Other tests run fine for other mocked classes, like here:
$this->SUserRoleRepository = $this->createStub(SUserRoleRepository::class);
So, why do I get a MappingException or TypeError, respectively, for some repositories but not others? Perhaps help me to understand the errors better? Thanks!

Answer 1

The issue was that my SType entity did not have an accurate #ORM\Entity(...) annotation. I had:
/**
* SType.
*
* #ORM\Table(name="s_type", indexes={#ORM\Index(name="idx_s_type_1", columns={"type_group"}), #ORM\Index(name="idx_s_type_2", columns={"code"})})
* #ORM\Entity
*/
class SType {}
Needed the repositoryClass relation:
/**
* SType.
*
* #ORM\Table(name="s_type", indexes={#ORM\Index(name="idx_s_type_1", columns={"type_group"}), #ORM\Index(name="idx_s_type_2", columns={"code"})})
* #ORM\Entity(repositoryClass="App\Repository\STypeRepository")
*/
class SType {}