code: def test_scatter_base(fake_writer):
      c = (
          Scatter()
          .add_xaxis(["A", "B", "C"])
          .add_yaxis("series0", [1, 2, 4])
          .add_yaxis("series1", [2, 3, 6])
      )
      c.render()
      _, content = fake_writer.call_args[0]
      assert_equal(c.theme, "white")
      assert_equal(c.renderer, "canvas")
  
file_path: pyecharts/test/test_scatter.py
imports: import json
  from unittest.mock import patch
  from nose.tools import assert_equal, assert_in
  from pyecharts import options
  from pyecharts.charts import Scatter, Grid
  from pyecharts.commons.utils import JsCode
  from pyecharts.faker import Faker
label_desc: Use image node_id 1 for calling a global function with example usage: test_scatter_base(fake_writer) without return types