FieldLanguageTest.php

<?php

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

use Drupal\views\Views;

/**
 * Tests the field language handler.
 *
 * @group language
 * @see \Drupal\language\Plugin\views\field\Language
 */
class FieldLanguageTest extends LanguageTestBase {
  
  /**
   * Views used by this test.
   *
   * @var array
   */
  public static $testViews = [
    'test_view',
  ];
  
  /**
   * Tests the language field.
   */
  public function testField() : void {
    $view = Views::getView('test_view');
    $view->setDisplay();
    $view->displayHandlers
      ->get('default')
      ->overrideOption('fields', [
      'langcode' => [
        'id' => 'langcode',
        'table' => 'views_test_data',
        'field' => 'langcode',
      ],
    ]);
    $this->executeView($view);
    $this->assertEquals('English', $view->field['langcode']
      ->advancedRender($view->result[0]));
    $this->assertEquals('Lolspeak', $view->field['langcode']
      ->advancedRender($view->result[1]));
  }

}