code: def test_boxarrow():
      styles = mpatches.BoxStyle.get_styles()
  
      n = len(styles)
      spacing = 1.2
  
      figheight = n * spacing + 0.5
      fig = plt.figure(figsize=(4 / 1.5, figheight / 1.5))
  
      fontsize = 0.3 * 72
  
      for i, stylename in enumerate(sorted(styles)):
          fig.text(
              0.5,
              ((n - i) * spacing - 0.5) / figheight,
              stylename,
              ha="center",
              size=fontsize,
              transform=fig.transFigure,
              bbox=dict(boxstyle=stylename, fc="w", ec="k"),
          )
  
file_path: matplotlib/lib/matplotlib/tests/test_arrow_patches.py
imports: import pytest
  import platform
  import matplotlib.pyplot
  from matplotlib.testing.decorators import image_comparison
  import matplotlib.patches
label_desc: Use image node_id 3 for calling a global function with example usage: test_boxarrow() without return types