class OverriddenConfigImportTest

class OverriddenConfigImportTest extends KernelTestBase {
  
  /**
   * Config Importer object used for testing.
   *
   * @var \Drupal\Core\Config\ConfigImporter
   */
  protected $configImporter;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'system',
    'language',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installConfig([
      'system',
    ]);
    $this->copyConfig($this->container
      ->get('config.storage'), $this->container
      ->get('config.storage.sync'));
    // Set up the ConfigImporter object for testing.
    $storage_comparer = new StorageComparer($this->container
      ->get('config.storage.sync'), $this->container
      ->get('config.storage'));
    $this->configImporter = new ConfigImporter($storage_comparer->createChangelist(), $this->container
      ->get('event_dispatcher'), $this->container
      ->get('config.manager'), $this->container
      ->get('lock'), $this->container
      ->get('config.typed'), $this->container
      ->get('module_handler'), $this->container
      ->get('module_installer'), $this->container
      ->get('theme_handler'), $this->container
      ->get('string_translation'), $this->container
      ->get('extension.list.module'), $this->container
      ->get('extension.list.theme'));
  }
  
  /**
   * Tests importing overridden config alongside config in the default language.
   */
  public function testConfigImportUpdates() {
    $storage = $this->container
      ->get('config.storage');
    $sync = $this->container
      ->get('config.storage.sync');
    /** @var \Drupal\language\ConfigurableLanguageManagerInterface $language_manager */
    $language_manager = $this->container
      ->get('language_manager');
    // Make a change to the site configuration in the default collection.
    $data = $storage->read('system.site');
    $data['name'] = 'English site name';
    $sync->write('system.site', $data);
    // Also make a change to the same config object, but using a language
    // override.
    /** @var \Drupal\Core\Config\StorageInterface $overridden_sync */
    $overridden_sync = $sync->createCollection('language.fr');
    $overridden_sync->write('system.site', [
      'name' => 'French site name',
    ]);
    // Before we start the import, the change to the site name should not be
    // present. This action also primes the cache in the config factory so that
    // we can test whether the cached data is correctly updated.
    $config = $this->config('system.site');
    $this->assertNotEquals('English site name', $config->getRawData()['name']);
    // Before the import is started the site name should not yet be overridden.
    $this->assertFalse($config->hasOverrides());
    $override = $language_manager->getLanguageConfigOverride('fr', 'system.site');
    $this->assertTrue($override->isNew());
    // Start the import of the new configuration.
    $this->configImporter
      ->reset()
      ->import();
    // Verify the new site name in the default language.
    $config = $this->config('system.site')
      ->getRawData();
    $this->assertEquals('English site name', $config['name']);
    // Verify the overridden site name.
    $override = $language_manager->getLanguageConfigOverride('fr', 'system.site');
    $this->assertEquals('French site name', $override->get('name'));
  }

}