code: def test_one_arrow(self):
      # we should be able to create a single arrow using create_quiver
  
      quiver = ff.create_quiver(x=[1], y=[1], u=[1], v=[1], scale=1)
      expected_quiver = {
          "data": [
              {
                  "mode": "lines",
                  "type": "scatter",
                  "x": [
                      1,
                      2,
                      None,
                      1.820698256761928,
                      2,
                      1.615486170766527,
                      None,
                  ],
                  "y": [
                      1,
                      2,
                      None,
                      1.615486170766527,
                      2,
                      1.820698256761928,
                      None,
                  ],
              }
          ],
          "layout": {"hovermode": "closest"},
      }
      self.assert_fig_equal(
          quiver["data"][0], expected_quiver["data"][0]
      )
      self.assert_fig_equal(quiver["layout"], expected_quiver["layout"])
  
imports: import math
  from unittest import TestCase
  import datetime
  import plotly.figure_factory
  import plotly.io
  from plotly.exceptions import PlotlyError
  from plotly.tests.test_optional.optional_utils import NumpyTestUtilsMixin
  from plotly.graph_objs import graph_objs
  from plotly.tests.utils import TestCaseNoTemplate
label_desc: Use image node_id 4 for calling the TestQuiver obj's underlying member method code with example usage: obj.test_one_arrow() without return types