Method foreach

src/tests/files_tests.cpp:89–93

  void TearDown() override
  {
    foreach (const string& realm, realms) {
      // We need to wait in order to ensure that the operation completes before
      // we leave `TearDown`. Otherwise, we may leak a mock object.
      AWAIT_READY(unsetAuthenticator(realm));
    }

    realms.clear();