code: def test_image_state(self):
      img = Points([(0, 0)]).opts(width=345, height=456)
      state = self._get_plot_state(img)
  
      self.assertEqual(state["layout"]["width"], 345)
      self.assertEqual(state["layout"]["height"], 456)
  
imports: from holoviews.element import Points
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 1 for calling the TestImagePlot obj's underlying member method code with example usage: obj.test_image_state() without return types