class FeedValidationTest

class FeedValidationTest extends EntityKernelTestBase {
  
  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = [
    'aggregator',
    'options',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installEntitySchema('aggregator_feed');
  }
  
  /**
   * Tests the feed validation constraints.
   */
  public function testValidation() {
    // Add feed.
    $feed = Feed::create([
      'title' => 'Feed 1',
      'url' => 'https://www.drupal.org/planet/rss.xml',
      'refresh' => 900,
    ]);
    $violations = $feed->validate();
    $this->assertCount(0, $violations);
    $feed->save();
    // Add another feed.
    /** @var \Drupal\aggregator\FeedInterface $feed */
    $feed = Feed::create([
      'title' => 'Feed 1',
      'url' => 'https://www.drupal.org/planet/rss.xml',
      'refresh' => 900,
    ]);
    $violations = $feed->validate();
    $this->assertCount(2, $violations);
    $this->assertEquals('title', $violations[0]->getPropertyPath());
    $this->assertEquals(t('A feed named %value already exists. Enter a unique title.', [
      '%value' => $feed->label(),
    ]), $violations[0]->getMessage());
    $this->assertEquals('url', $violations[1]->getPropertyPath());
    $this->assertEquals(t('A feed with this URL %value already exists. Enter a unique URL.', [
      '%value' => $feed->getUrl(),
    ]), $violations[1]->getMessage());
  }

}