code: def test_path_energy_is_positive(self, path, atol):
      energy = self.space.metric.path_energy(path)
      self.assertTrue(gs.all(energy > -1 * atol))
  
file_path: geomstats/geomstats/test_cases/geometry/discrete_surfaces.py
imports: import geomstats.backend
  from geomstats.test_cases.geometry.manifold import ManifoldTestCase
  from geomstats.test_cases.geometry.riemannian_metric import RiemannianMetricTestCase
  from geomstats.vectorization import get_n_points
label_desc: Use image node_id 1 for calling the ElasticMetricTestCase obj's underlying member method code with example usage: obj.test_path_energy_is_positive(path, atol) without return types