code: def test_spikes_padding_square(self):
      spikes = Spikes([1, 2, 3]).opts(padding=0.1)
      plot = mpl_renderer.get_plot(spikes)
      x_range = plot.handles["axis"].get_xlim()
      self.assertEqual(x_range[0], 0.8)
      self.assertEqual(x_range[1], 3.2)
  
imports: import numpy
  import pytest
  from holoviews.core.options import AbbreviatedException
  from holoviews.core.overlay import NdOverlay
  from holoviews.core.spaces import HoloMap
  from holoviews.element import Spikes
  from ..utils import ParamLogStream
  from .test_plot import TestMPLPlot, mpl_renderer
label_desc: Use image node_id 1 for calling the TestSpikesPlot obj's underlying member method code with example usage: obj.test_spikes_padding_square() without return types