content: import random
  import unittest
  from unittest.mock import patch
  
  from pyecharts import options as opts
  from pyecharts.charts import GraphGL
  
  
  class TestGraphGLChart(unittest.TestCase):
      @patch("pyecharts.render.engine.write_utf8_html_file")
      def test_graph_gl_base(self, fake_writer):
          nodes = []
          for i in range(50):
              for j in range(50):
                  nodes.append(
                      opts.GraphGLNode(
                          x=random.random() * 958,
                          y=random.random() * 777,
                          value=1,
                      )
                  )
  
          links = []
          for i in range(50):
              for j in range(50):
                  if i < 50 - 1:
                      links.append(
                          opts.GraphGLLink(
                              source=i + j * 50,
                              target=i + 1 + j * 50,
                              value=1,
                          )
                      )
                  if j < 50 - 1:
                      links.append(
                          opts.GraphGLLink(
                              source=i + j * 50,
                              target=i + (j + 1) * 50,
                              value=1,
                          )
                      )
  
          c = (
              GraphGL(init_opts=opts.InitOpts())
              .add(
                  series_name="",
                  nodes=nodes,
                  links=links,
                  itemstyle_opts=opts.ItemStyleOpts(color="rgba(255,255,255,0.8)"),
                  linestyle_opts=opts.LineStyleOpts(
                      color="rgba(255,255,255,0.8)", width=3
                  ),
                  force_atlas2_opts=opts.GraphGLForceAtlas2Opts(
                      steps=5,
                      edge_weight_influence=4,
                  ),
              )
              .set_dark_mode()
          )
          c.render()
          _, content = fake_writer.call_args[0]
          self.assertEqual(c.theme, "dark")
          self.assertEqual(c.renderer, "canvas")
  