code: def test_imagegrid():
      fig = plt.figure()
      grid = ImageGrid(fig, 111, nrows_ncols=(1, 1))
      ax = grid[0]
      im = ax.imshow([[1, 2]], norm=mpl.colors.LogNorm())
      cb = ax.cax.colorbar(im)
      assert isinstance(cb.locator, mticker.LogLocator)
  
imports: from itertools import product
  import io
  import platform
  import matplotlib
  import matplotlib.pyplot
  import matplotlib.ticker
  from matplotlib import cbook
  from matplotlib.backend_bases import MouseEvent
  from matplotlib.colors import LogNorm
  from matplotlib.patches import Circle, Ellipse
  from matplotlib.transforms import Bbox, TransformedBbox
  from matplotlib.testing.decorators import check_figures_equal, image_comparison, remove_ticks_and_titles
  from mpl_toolkits.axes_grid1 import axes_size, host_subplot, make_axes_locatable, Grid, AxesGrid, ImageGrid
  from mpl_toolkits.axes_grid1.anchored_artists import AnchoredAuxTransformBox, AnchoredDrawingArea, AnchoredEllipse, AnchoredDirectionArrows, AnchoredSizeBar
  from mpl_toolkits.axes_grid1.axes_divider import Divider, HBoxDivider, make_axes_area_auto_adjustable, SubplotDivider, VBoxDivider
  from mpl_toolkits.axes_grid1.axes_rgb import RGBAxes
  from mpl_toolkits.axes_grid1.inset_locator import zoomed_inset_axes, mark_inset, inset_axes, BboxConnectorPatch, InsetPosition
  import mpl_toolkits.axes_grid1.mpl_axes
  import pytest
  import numpy
  from numpy.testing import assert_array_equal, assert_array_almost_equal
label_desc: Use image node_id 34 for calling a global function with example usage: test_imagegrid() without return types