code: def test_mathdefault():
      plt.rcParams["axes.formatter.use_mathtext"] = True
      fig = plt.figure()
      fig.add_subplot().set_xlim(-1, 1)
      # Check that \mathdefault commands generated by tickers don't cause
      # problems when later switching usetex on.
      mpl.rcParams["text.usetex"] = True
      fig.canvas.draw()
  
imports: from tempfile import TemporaryFile
  import numpy
  from packaging.version import parse
  import pytest
  import matplotlib
  from matplotlib import dviread
  from matplotlib.testing import _has_tex_package
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  from matplotlib.testing._markers import needs_usetex
  import matplotlib.pyplot
label_desc: Use image node_id 4 for calling a global function with example usage: test_mathdefault() without return types