ConstraintFactoryTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Validation;

use Drupal\Component\Plugin\PluginBase;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\Validator\Constraint;

/**
 * @coversDefaultClass \Drupal\Core\Validation\ConstraintFactory
 *
 * @group Validation
 */
class ConstraintFactoryTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'entity_test',
    ];
    
    /**
     * @covers ::createInstance
     */
    public function testCreateInstance() : void {
        $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
        // If the plugin is a \Symfony\Component\Validator\Constraint, they will be
        // created first.
        $this->assertInstanceOf(Constraint::class, $constraint_manager->create('Uuid', []));
        // If the plugin implements the
        // \Drupal\Core\Plugin\ContainerFactoryPluginInterface, they will be created
        // second.
        $container_factory_plugin = $constraint_manager->create('EntityTestContainerFactoryPlugin', []);
        $this->assertNotInstanceOf(Constraint::class, $container_factory_plugin);
        $this->assertInstanceOf(ContainerFactoryPluginInterface::class, $container_factory_plugin);
        // Plugins that are not a \Symfony\Component\Validator\Constraint or do not
        // implement the \Drupal\Core\Plugin\ContainerFactoryPluginInterface are
        // created last.
        $default_plugin = $constraint_manager->create('EntityTestDefaultPlugin', []);
        $this->assertNotInstanceOf(Constraint::class, $default_plugin);
        $this->assertNotInstanceOf(ContainerFactoryPluginInterface::class, $default_plugin);
        $this->assertInstanceOf(PluginBase::class, $default_plugin);
    }

}