code: def test_violin_single_point(self):
      data = {"x": [1], "y": [1]}
      violin = Violin(data=data, kdims="x", vdims="y").opts(inner="box")
  
      plot = bokeh_renderer.get_plot(violin)
      self.assertEqual(plot.handles["x_range"].factors, ["1"])
  
imports: from unittest import SkipTest
  import numpy
  from bokeh.models import CategoricalColorMapper, LinearColorMapper
  from holoviews.element import Violin
  from holoviews.operation.stats import univariate_kde
  from holoviews.plotting.bokeh.util import property_to_dict
  from holoviews.util.transform import dim
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 8 for calling the TestBokehViolinPlot obj's underlying member method code with example usage: obj.test_violin_single_point() without return types