code: def test_single_box(self):
      box = Box(0, 0, (1, 2), orientation=1)
      state = self._get_plot_state(box)
      shapes = state["layout"]["shapes"]
      self.assertEqual(len(shapes), 1)
      self.assert_path_shape_element(shapes[0], box)
  
imports: import numpy
  from holoviews.element import Bounds, Box, HLine, Path, Rectangles, Segments, Tiles, VLine
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 1 for calling the TestBox obj's underlying member method code with example usage: obj.test_single_box() without return types