code: def test_render(fake_writer):
      my_render_content = "my_render_content"
      bar = Bar()
      bar.add_xaxis(["1"]).add_yaxis("", [1]).render(
          my_render_content=my_render_content
      )
      assert "test ok" == "test ok"
  
file_path: pyecharts/test/test_base.py
imports: from datetime import datetime
  from unittest.mock import patch
  from nose.tools import assert_equal, assert_in, assert_not_in
  from pyecharts.charts import Bar
  from pyecharts.commons import utils
  from pyecharts.datasets import EXTRA
  from pyecharts.options import InitOpts, RenderOpts
  from pyecharts.globals import CurrentConfig
  from pyecharts.charts.base import Base, default
  from pyecharts.options.global_options import AnimationOpts
label_desc: Use image node_id 3 for calling a global function with example usage: test_render(fake_writer) without return types