code: def test_pyplot_box():
      fig, ax = plt.subplots()
      plt.box(False)
      assert not ax.get_frame_on()
      plt.box(True)
      assert ax.get_frame_on()
      plt.box()
      assert not ax.get_frame_on()
      plt.box()
      assert ax.get_frame_on()
  
imports: import difflib
  import numpy
  import sys
  from pathlib import Path
  import pytest
  import matplotlib
  from matplotlib.testing import subprocess_run_for_testing
  from matplotlib import pyplot
label_desc: Use image node_id 3 for calling a global function with example usage: test_pyplot_box() without return types