code: def test_histogram_padding_datetime_square(self):
      histogram = Histogram(
          [
              (np.datetime64("2016-04-0%d" % i, "ns"), i)
              for i in range(1, 4)
          ]
      ).opts(padding=0.1)
      plot = bokeh_renderer.get_plot(histogram)
      x_range, y_range = (
          plot.handles["x_range"],
          plot.handles["y_range"],
      )
      self.assertEqual(
          x_range.start, np.datetime64("2016-03-31T04:48:00.000000000")
      )
      self.assertEqual(
          x_range.end, np.datetime64("2016-04-03T19:12:00.000000000")
      )
      self.assertEqual(y_range.start, 0)
      self.assertEqual(y_range.end, 3.2)
  
imports: import datetime
  import numpy
  from bokeh.models import CategoricalColorMapper, DatetimeAxis, LinearColorMapper
  from holoviews.core.overlay import NdOverlay
  from holoviews.element import Dataset, Histogram, Image, Points
  from holoviews.operation import histogram
  from holoviews.plotting.bokeh.util import property_to_dict
  from ...utils import LoggingComparisonTestCase
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 11 for calling the TestSideHistogramPlot obj's underlying member method code with example usage: obj.test_histogram_padding_datetime_square() without return types