<< TF_Message(s);

    ::tensorflow::string filepath =
        ::tensorflow::io::JoinPath(dirpath, "somefile.txt");
    TF_WritableFileHandle* handle;
    TF_NewWritableFile(filepath.c_str(), &handle, s);
    ASSERT_TF_OK(s) << "NewWritableFile failed for " << filepath << ": "
                    << TF_Message(s);

    const char* data = "Hello, world!\n";

  ASSERT_TF_OK(status_) << "Could not initialize filesystem. "
                        << TF_Message(status_);
  std::string filepath = GetURIForPath("a_file");
  TF_RandomAccessFile* file = new TF_RandomAccessFile;
  tf_gcs_filesystem::NewRandomAccessFile(filesystem_, filepath.c_str(), file,
                                         status_);
  ASSERT_TF_OK(status_);
  char* result = new char[content_view.length()];

TEST_P(ModularFileSystemTest, TestRenameFile) {
  const std::string filepath = GetURIForPath("a_file");
  std::unique_ptr<WritableFile> new_file;
  Status status = env_->NewWritableFile(filepath, &new_file);
  if (!status.ok())
    GTEST_SKIP() << "NewWritableFile() not supported: " << status;

  const std::string new_filepath = GetURIForPath("a_new_file");
  status = env_->RenameFile(filepath, new_filepath);