class FileStorageTest

1. 8.x drupal/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php \Drupal\Tests\Component\PhpStorage\FileStorageTest
2. 8.x drupal/core/modules/config/lib/Drupal/config/Tests/Storage/FileStorageTest.php \Drupal\config\Tests\Storage\FileStorageTest

class FileStorageTest extends ConfigStorageTestBase {
  public static function getInfo() {
    return array(
      'name' => 'FileStorage controller operations',
      'description' => 'Tests FileStorage controller operations.',
      'group' => 'Configuration',
    );
  }
  function setUp() {
    parent::setUp();
    $this->storage = new FileStorage($this->configDirectories[CONFIG_ACTIVE_DIRECTORY]);
    $this->invalidStorage = new FileStorage($this->configDirectories[CONFIG_ACTIVE_DIRECTORY] . '/nonexisting');

    // FileStorage::listAll() requires other configuration data to exist.
    $this->storage
      ->write('system.performance', config('system.performance')
      ->get());
  }
  protected function read($name) {
    $data = file_get_contents($this->storage
      ->getFilePath($name));
    return Yaml::parse($data);
  }
  protected function insert($name, $data) {
    file_put_contents($this->storage
      ->getFilePath($name), $data);
  }
  protected function update($name, $data) {
    file_put_contents($this->storage
      ->getFilePath($name), $data);
  }
  protected function delete($name) {
    unlink($this->storage
      ->getFilePath($name));
  }

}