code: def test_colorbar_shift(tmp_path):
      cmap = mcolors.ListedColormap(["r", "g", "b"])
      norm = mcolors.BoundaryNorm([-1, -0.5, 0.5, 1], cmap.N)
      plt.scatter([0, 1], [1, 1], c=[0, 1], cmap=cmap, norm=norm)
      plt.colorbar()
  
imports: from collections import Counter
  from pathlib import Path
  import io
  import re
  import tempfile
  import numpy
  import pytest
  from matplotlib import cbook, path, patheffects, font_manager
  from matplotlib.figure import Figure
  from matplotlib.patches import Ellipse
  from matplotlib.testing._markers import needs_ghostscript, needs_usetex
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  import matplotlib
  import matplotlib.collections
  import matplotlib.colors
  import matplotlib.pyplot
label_desc: Use image node_id 23 for calling a global function with example usage: test_colorbar_shift(tmp_path) without return types