new_contents: # -*- coding: utf-8 -*-
  # -----------------------------------------------------------------------------
  # Copyright (c) Vispy Development Team. All Rights Reserved.
  # Distributed under the (new) BSD License. See LICENSE.txt for more info.
  # -----------------------------------------------------------------------------
  from vispy.scene.widgets import ViewBox
  from vispy.testing import run_tests_if_main
  
  
  def test_turntable_camera_link():
      vbs = [ViewBox(camera='turntable') for _ in range(3)]
      cams = [vb.camera for vb in vbs]
  
      for cam in cams:
          cam.elevation = 45.0
          cam.azimuth = 120.0
          cam.scale_factor = 4.0
  
      cams[0].link(cams[1])
      cams[0].link(cams[2], props=['azimuth', 'elevation'])
  
      cams[1].elevation = 30.0
      cams[1].azimuth = 90.0
      cams[1].scale_factor = 2.0
  
      assert cams[0].elevation == 30.0
      assert cams[0].azimuth == 90.0
      assert cams[0].scale_factor == 2.0
  
      assert cams[2].elevation == 30.0
      assert cams[2].azimuth == 90.0
      assert cams[2].scale_factor == 4.0
  
  
  def test_panzoom_link():
      vbs = [ViewBox(camera='panzoom') for _ in range(4)]
      cams = [vb.camera for vb in vbs]
  
      for cam in cams:
          cam.rect = (0, 0, 100, 100)
  
      cams[0].link(cams[1])
      cams[0].link(cams[2], axis='x')
      cams[0].link(cams[3], axis='y')
  
      cams[1].rect = (-20, -20, 130, 130)
  
      assert cams[0].rect.pos == (-20, -20) and cams[0].rect.size == (130, 130)
      assert cams[2].rect.pos == (-20, 0) and cams[2].rect.size == (130, 100)
      assert cams[3].rect.pos == (0, -20) and cams[3].rect.size == (100, 130)
  
  
  run_tests_if_main()
  
subject: Add tests for camera linking