code: def test_zoom_center(self):
      center = (10.0, 20.0)
      fig = figure(zoom_level=10, center=center)
      map_ = fig._map
      assert map_.initial_viewport.zoom_level == 10
      assert map_.initial_viewport.center == center
  
imports: import unittest
  import traitlets
  from ..figure import figure, Figure, FigureLayout
  from ..maps import Map
  from ..toolbar import Toolbar
  from ..errors_box import ErrorsBox
label_desc: Use image node_id 2 for calling the TestFigureFactory obj's underlying member method code with example usage: obj.test_zoom_center() without return types