code: def test_method_content(
      self, client: OpenAI, respx_mock: MockRouter
  ) -> None:
      respx_mock.get("/files/string/content").mock(
          return_value=httpx.Response(200, json={"foo": "bar"})
      )
      file = client.files.content(
          "string",
      )
      assert isinstance(
          file, _legacy_response.HttpxBinaryResponseContent
      )
      assert file.json() == {"foo": "bar"}
  
imports: from __future__ import annotations
  import os
  from typing import Any, cast
  import httpx
  import pytest
  from respx import MockRouter
  import openai._legacy_response
  from openai import OpenAI, AsyncOpenAI
  from tests.utils import assert_matches_type
  from openai.types import FileObject, FileDeleted
  from openai._client import OpenAI, AsyncOpenAI
  from openai.pagination import SyncPage, AsyncPage
label_desc: Use image node_id 16 for calling the TestFiles obj's underlying member method code with example usage: obj.test_method_content(client, respx_mock) without return types