class LanguageLocaleListTest

class LanguageLocaleListTest extends BrowserTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'language',
    'locale',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * @var \Drupal\locale\StringStorageInterface
   */
  protected $storage;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Add a default locale storage for all these tests.
    $this->storage = $this->container
      ->get('locale.storage');
  }
  
  /**
   * Tests adding, editing, and deleting languages.
   */
  public function testLanguageLocaleList() {
    // User to add and remove language.
    $admin_user = $this->drupalCreateUser([
      'administer languages',
      'access administration pages',
    ]);
    $this->drupalLogin($admin_user);
    // Add predefined language.
    $edit = [
      'predefined_langcode' => 'fr',
    ];
    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add language');
    $this->assertSession()
      ->statusMessageContains('The language French has been created and can now be used', 'status');
    $this->assertSession()
      ->addressEquals(Url::fromRoute('entity.configurable_language.collection'));
    $this->rebuildContainer();
    // Translate Spanish language to French (Espagnol).
    $source = $this->storage
      ->createString([
      'source' => 'Spanish',
      'context' => '',
    ])
      ->save();
    $this->storage
      ->createTranslation([
      'lid' => $source->lid,
      'language' => 'fr',
      'translation' => 'Espagnol',
    ])
      ->save();
    // Get language list displayed in select list.
    $this->drupalGet('fr/admin/config/regional/language/add');
    $options = $this->assertSession()
      ->selectExists('edit-predefined-langcode')
      ->findAll('css', 'option');
    $options = array_map(function ($item) {
      return $item->getText();
    }, $options);
    // Remove the 'Custom language...' option form the end.
    array_pop($options);
    // Order language list.
    $options_ordered = $options;
    natcasesort($options_ordered);
    // Check the language list displayed is ordered.
    $this->assertSame($options, $options_ordered, 'Language list is ordered.');
  }

}