Function pull

packages/dofs/src/fs/writeFile.test.ts:57–63

(controller)

  let i = 0;
  return new ReadableStream<Uint8Array>({
    pull(controller) {
      if (i < chunks.length) {
        controller.enqueue(chunks[i++]);
      } else {
        controller.close();
      }
    },
  });
}