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([]);
  }

}