fix: #3612163 When installing themes on the Appearance page, batches added...

<?php

declare(strict_types=1);

namespace Drupal\Tests\locale\Functional;

use Drupal\Tests\BrowserTestBase;

use PHPUnit\Framework\Attributes\Group;

use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;

/**

 * Tests that locale rewrites config langcodes after theme install.

 *

 * When a theme ships config with langcode 'en' and locale is enabled with a

 * non-English site default, locale's updateDefaultConfigLangcodes() batch

 * must rewrite those langcodes to the site default after install.

 */

#[Group('locale')]

#[RunTestsInSeparateProcesses]

class LocaleThemeInstallTest extends BrowserTestBase {

  /**

   * {@inheritdoc}

   */

  protected static $modules = ['language', 'locale'];

  /**

   * {@inheritdoc}

   */

  protected $defaultTheme = 'stark';

  /**

   * {@inheritdoc}

   */

  protected function installParameters(): array {

    $parameters = parent::installParameters();

    $parameters['parameters']['langcode'] = 'de';

    // Create a po file so we don't attempt to download one from

    // localize.drupal.org and to have a test translation that will not change.

    \Drupal::service('file_system')->mkdir($this->publicFilesDirectory . '/translations', NULL, TRUE);

    $contents = <<<PO

msgid ""

msgstr ""

PO;

    file_put_contents($this->publicFilesDirectory . '/translations/drupal-' . \Drupal::VERSION . '.de.po', $contents);

    return $parameters;

  }

  /**

   * {@inheritdoc}

   */

  protected function setUp(): void {

    parent::setUp();

    $admin = $this->drupalCreateUser([

      'administer themes',

      'administer languages',

      'access administration pages',

    ]);

    $this->drupalLogin($admin);

  }

  /**

   * Tests that installing a theme via the UI updates config language.

   *

   * The olivero theme ships core.date_format.olivero_medium with langcode

   * 'en'. With locale enabled and a non-English site default, that langcode

   * should be rewritten to the site default after the install batch runs.

   */

  public function testThemeInstallRewritesConfigLangcode(): void {

    // Install olivero via the Appearance UI.

    $this->drupalGet('admin/appearance');

    $this->cssSelect('a[title="Install Olivero theme"]')[0]->click();

    // The ThemeController redirects to the batch page; follow its meta-refresh

    // chain to process all batch operations before asserting config state.

    $this->checkForMetaRefresh();

    $this->rebuildContainer();

    // core.date_format.olivero_medium ships with langcode 'en'. Locale's

    // updateDefaultConfigLangcodes() should have rewritten it to 'de'.

    $langcode = $this->config('core.date_format.olivero_medium')->get('langcode');

    $this->assertSame('de', $langcode);

    // Ensure that the theme is installed.

    $this->assertSession()->addressEquals('admin/appearance');

    $this->assertSession()->pageTextContains('The Olivero theme has been installed.');

  }

  /**

   * Tests that "install as default" also updates config language.

   */

  public function testThemeSetDefaultRewritesConfigLangcode(): void {

    $this->drupalGet('admin/appearance');

    $this->cssSelect('a[title="Install Olivero as default theme"]')[0]->click();

    $this->checkForMetaRefresh();

    $this->rebuildContainer();

    $langcode = $this->config('core.date_format.olivero_medium')->get('langcode');

    $this->assertSame('de', $langcode);

    $this->assertSession()->addressEquals('admin/appearance');

    $this->assertSession()->pageTextContains('Olivero is now the default theme.');

  }

}

use Drupal\Core\Config\UnmetDependenciesException;

use Drupal\Core\Controller\ControllerBase;

use Drupal\Core\StringTranslation\TranslatableMarkup;

use Drupal\Core\Url;

use Drupal\Core\Extension\MissingDependencyException;

use Drupal\Core\Extension\ThemeExtensionList;

use Drupal\Core\Extension\ThemeHandlerInterface;

      $this->messenger()->addError($this->t('Unable to install @theme due to missing module dependencies.', ['@theme' => $theme]));

    }

    // Process any batch queued by hook_themes_installed (e.g. locale's

    // langcode rewrite). batch_process() redirects to the batch page and

    // then to $redirect after completion, so it is returned directly.

    $batch = &batch_get();

    if (!empty($batch)) {

      return batch_process(Url::fromRoute('system.themes_page'));

    }

    return $this->redirect('system.themes_page');

  }

      $this->messenger()->addError($this->t('The %theme theme was not found.', ['%theme' => $theme]));

    }

    // Process any batch queued by hook_themes_installed (e.g. locale's

    // langcode rewrite). batch_process() redirects to the batch page and

    // then to $redirect after completion, so it is returned directly.

    $batch = &batch_get();

    if (!empty($batch)) {

      return batch_process(Url::fromRoute('system.themes_page'));

    }

    return $this->redirect('system.themes_page');

  }