code: def test_font_eq(default_theme):
      defa_theme = pv.plotting.themes.Theme()
      assert defa_theme.font == default_theme.font
  
      paraview_theme = pv.plotting.themes.ParaViewTheme()
      assert paraview_theme.font != default_theme.font
      assert paraview_theme.font != 1
  
imports: import os
  import pytest
  import vtk
  import pyvista
  from pyvista import colors
  from pyvista.examples.downloads import download_file
  from pyvista.plotting.themes import DarkTheme, Theme, _set_plot_theme_from_env
  from pyvista.plotting.utilities.gl_checks import uses_egl
label_desc: Use image node_id 13 for calling a global function with example usage: test_font_eq(default_theme) without return types