ContactFormValidationTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\contact\Kernel;

use Drupal\contact\ContactFormInterface;
use Drupal\contact\Entity\ContactForm;
use Drupal\KernelTests\Core\Config\ConfigEntityValidationTestBase;

/**
 * Tests validation of contact_form entities.
 *
 * @group contact
 */
class ContactFormValidationTest extends ConfigEntityValidationTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'contact',
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->entity = ContactForm::create([
            'id' => 'test',
            'label' => 'Test',
        ]);
        $this->entity
            ->save();
    }
    
    /**
     * Tests validation of message.
     */
    public function testMessageValidation() : void {
        assert($this->entity instanceof ContactFormInterface);
        // Messages should be able to span multiple lines.
        $this->entity
            ->setMessage("Multi\nLine");
        $this->assertValidationErrors([]);
    }

}