code: def christoffels_test_data(self):
      data = [
          dict(
              base_point=gs.array([0.1]), expected=gs.zeros((1, 1, 1))
          ),
          dict(
              base_point=gs.array([0.88]), expected=gs.zeros((1, 1, 1))
          ),
      ]
      return self.generate_tests(data)
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .riemannian_metric import RiemannianMetricComparisonTestData, RiemannianMetricTestData
label_desc: Use image node_id 5 for calling the CircleIntrinsicMetricTestData obj's underlying member method code with example usage: obj.christoffels_test_data() and returns: self