code: def test_template_default(self):
      pio.templates.default = "test_template"
      fig = go.Figure()
      self.assertEqual(
          fig.layout.template, pio.templates["test_template"]
      )
  
imports: import copy
  from unittest import TestCase
  import pytest
  import plotly.io
  import plotly.graph_objs
  from plotly.tests.utils import TestCaseNoTemplate
label_desc: Use image node_id 14 for calling the TemplateTest obj's underlying member method code with example usage: obj.test_template_default() without return types