getSync example

  public function testGetSync() {

    // Write some random data to the sync storage.     $name = $this->randomMachineName();
    $data = (array) $this->getRandomGenerator()->object();
    $storage = new FileStorage(Settings::get('config_sync_directory'));
    $storage->write($name, $data);

    // Get the sync storage and read from it.     $sync = FileStorageFactory::getSync();
    $this->assertEquals($data, $sync->read($name));

    // Unset the sync directory setting.     $settings = Settings::getInstance() ? Settings::getAll() : [];
    unset($settings['config_sync_directory']);
    new Settings($settings);

    // On an empty settings there is an exception thrown.     $this->expectException(ConfigDirectoryNotDefinedException::class);
    $this->expectExceptionMessage('The config sync directory is not defined in $settings["config_sync_directory"]');
    FileStorageFactory::getSync();
  }