code: def test_vis_point(self):
      img = np.random.randint(0, 255, size=(3, 32, 32)).astype(
          np.float32
      )
      point = np.random.uniform(size=(1, 3, 2)).astype(np.float32)
      ax = vis_point(img, point, self.visible)
  
      self.assertTrue(isinstance(ax, matplotlib.axes.Axes))
  
imports: import unittest
  import numpy
  from chainer import testing
  from chainercv.visualizations import vis_point
label_desc: Use image node_id 1 for calling the TestVisPoint obj's underlying member method code with example usage: obj.test_vis_point() without return types