ExtensionNameConstraintTest.php

<?php

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

use Drupal\Core\TypedData\DataDefinition;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the ExtensionName constraint.
 *
 * @group Validation
 *
 * @covers \Drupal\Core\Extension\Plugin\Validation\Constraint\ExtensionNameConstraint
 */
class ExtensionNameConstraintTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * Tests the ExtensionName constraint.
     */
    public function testValidation() : void {
        // Create a data definition that specifies the value must be a string with
        // the name of a valid extension.
        $definition = DataDefinition::create('string')->addConstraint('ExtensionName');
        
        /** @var \Drupal\Core\TypedData\TypedDataManagerInterface $typed_data */
        $typed_data = $this->container
            ->get('typed_data_manager');
        $data = $typed_data->create($definition, 'user');
        $this->assertCount(0, $data->validate());
        $data->setValue('invalid-name');
        $violations = $data->validate();
        $this->assertCount(1, $violations);
        $this->assertSame('This value is not valid.', (string) $violations->get(0)
            ->getMessage());
    }

}