**意图：**我想测试School实体上是否有我想要的验证，为此我想编写一个扩展TypeTestCase的测试类
疑问/问题：

1.我要清 debugging 误Error: Class "doctrine.orm.validator.unique" not found
1.我想为元素的每个约束Assert错误消息。当我从模型中删除#[UniqueEntity('name')]时，问题1消失了，但Assertself::assertCount(1, $form->getErrors());仍然失败。这意味着$form->getErrors()没有名称为空的验证错误。
我正在尝试编写一个symfony测试一个带有DB实体的symfony Form类型，定义如下：

namespace App\Entity;

use App\Repository\SchoolRepository;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Validator\Constraints as Assert;

#[ORM\Entity(repositoryClass: SchoolRepository::class)]
// >>>>>>> If I remove it problem 1 will be solved 
#[UniqueEntity('name')]
class School implements TenantAwareInterface
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column(type: 'integer')]
    private $id;

    #[Assert\NotBlank]
    #[ORM\Column(type: 'string', length: 255, unique: true)]
    private $name;
    public function getId(): ?int
    {
        return $this->id;
    }

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName(string $name): self
    {
        $this->name = $name;

        return $this;
    }
}

而形式是：

namespace App\Form;

use App\Entity\School;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class SchoolType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        $builder->add('name');
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'data_class' => School::class,
            'required' => false
        ]);
    }
}

测试：

namespace App\Tests\Integration\Form;

use App\Entity\School;
use App\Form\SchoolType;
use Doctrine\Persistence\ManagerRegistry;
use Mockery as m;
use Symfony\Bridge\Doctrine\Form\DoctrineOrmExtension;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
use Symfony\Component\Form\PreloadedExtension;
use Symfony\Component\Form\Test\Traits\ValidatorExtensionTrait;
use Symfony\Component\Form\Test\TypeTestCase;
use Symfony\Component\Validator\Validation;
use Symfony\Contracts\Translation\TranslatorInterface;

class SchoolTypeTest extends TypeTestCase
{
    use ValidatorExtensionTrait;

    protected function getExtensions(): array
    {
        $validator = Validation::createValidatorBuilder()
            ->enableAnnotationMapping()
            ->addDefaultDoctrineAnnotationReader()
            ->getValidator();

        $mockedManagerRegistry = m::mock(ManagerRegistry::class, ['getManagers' => []]);

        return [
            new ValidatorExtension($validator),
            new DoctrineOrmExtension($mockedManagerRegistry),
        ];
    }

    public function testValidationReturnsError()
    {
        $school = new School();
        $form = $this->factory->create(SchoolType::class, $school);

        $form->submit([]);

        self::assertTrue($form->isSynchronized());
        self::assertFalse($form->isValid());

        // >>>>>>> I want this to assert, problem 2
        self::assertCount(1, $form->getErrors());
    }
}