code: def log_test_data(self):
      expected = gs.array(
          [
              [[gs.pi / 2, 0, 0], [0, 0, 0]],
              [[0, -gs.pi / 2, 0], [0, 0, 0]],
          ]
      )
  
      data = [
          dict(
              point=gs.array([self.pu1, self.pu0]),
              base_point=gs.array([self.pu0, self.pu1]),
              expected=expected,
          )
      ]
      return self.generate_tests(data)
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
label_desc: Use image node_id 3 for calling the SasakiMetricSphereTestData obj's underlying member method code with example usage: obj.log_test_data() and returns: self