code: def test_raster_nodata_uint(self):
      arr = np.array([[0, 1, 2], [3, 4, 5]], dtype="uint32")
      expected = np.array([[3, 4, 5], [np.nan, 1, 2]])
  
      raster = Raster(arr).opts(nodata=0)
      plot = mpl_renderer.get_plot(raster)
      artist = plot.handles["artist"]
      np.testing.assert_equal(artist.get_array().data, expected)
  
file_path: holoviews/holoviews/tests/plotting/matplotlib/test_rasterplot.py
imports: from unittest import SkipTest
  import numpy
  from matplotlib.colors import ListedColormap
  from holoviews.element import Image, ImageStack, Raster
  from holoviews.plotting.mpl.raster import RGBPlot
  from .test_plot import TestMPLPlot, mpl_renderer
label_desc: Use image node_id 3 for calling the TestRasterPlot obj's underlying member method code with example usage: obj.test_raster_nodata_uint() without return types