code: def test_long_path():
      buff = io.BytesIO()
      fig = Figure()
      ax = fig.subplots()
      points = np.ones(100_000)
      points[::2] *= -1
      ax.plot(points)
      fig.savefig(buff, format="png")
  
imports: import io
  import numpy
  from numpy.testing import assert_array_almost_equal
  from PIL import Image, TiffTags
  import pytest
  from matplotlib import collections, patheffects, pyplot, transforms, rcParams, rc_context
  from matplotlib.backends.backend_agg import RendererAgg
  from matplotlib.figure import Figure
  from matplotlib.image import imread
  from matplotlib.path import Path
  from matplotlib.testing.decorators import image_comparison
  from matplotlib.transforms import IdentityTransform
label_desc: Use image node_id 4 for calling a global function with example usage: test_long_path() without return types