code: def test_sectional_curvature_smoke(self, atol):
      base_point = self.space.identity
      x, y, z = self.space.metric.normal_basis(
          self.space.lie_algebra.basis
      )
  
      self.test_sectional_curvature(x, y, base_point, 1.0 / 8, atol)
      self.test_sectional_curvature(y, y, base_point, 0.0, atol)
      self.test_sectional_curvature(
          gs.stack([y, y]),
          gs.stack([z] * 2),
          base_point,
          gs.array([1.0 / 8, 1.0 / 8]),
          atol,
      )
  
imports: import random
  import pytest
  import geomstats.backend
  from geomstats.geometry.invariant_metric import BiInvariantMetric, _InvariantMetricMatrix, _InvariantMetricVector
  from geomstats.geometry.special_euclidean import SpecialEuclidean
  from geomstats.geometry.special_orthogonal import SpecialOrthogonal
  from geomstats.test.parametrizers import DataBasedParametrizer
  from geomstats.test.random import RandomDataGenerator
  from geomstats.test_cases.geometry.invariant_metric import BiInvariantMetricTestCase, InvariantMetricMatrixTestCase, InvariantMetricVectorTestCase
  from .data.invariant_metric import BiInvariantMetricMatrixTestData, BiInvariantMetricVectorsSOTestData, InvariantMetricMatrixSETestData, InvariantMetricMatrixSO3TestData, InvariantMetricMatrixSOTestData, InvariantMetricVectorTestData
label_desc: Use image node_id 3 for calling the TestInvariantMetricMatrixSO3 obj's underlying member method code with example usage: obj.test_sectional_curvature_smoke(atol) without return types