code: def test_get_tightbbox_polar():
      fig, ax = plt.subplots(subplot_kw={"projection": "polar"})
      fig.canvas.draw()
      bb = ax.get_tightbbox(fig.canvas.get_renderer())
      assert_allclose(
          bb.extents,
          [107.7778, 29.2778, 539.7847, 450.7222],
          rtol=1e-03,
      )
  
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  import matplotlib
  from matplotlib import pyplot
  from matplotlib.testing.decorators import image_comparison, check_figures_equal
label_desc: Use image node_id 23 for calling a global function with example usage: test_get_tightbbox_polar() without return types