docstr: Test faces area.
docstr_tok: ["Test","faces","area","."]
code: def test_faces_area(self, point, expected, atol):
      """Test faces area."""
      res = self.space.face_areas(point=point)
      self.assertAllClose(res, expected, atol=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 4 for calling the DiscreteSurfacesTestCase obj's underlying member method code with example usage: obj.test_faces_area(point, expected, atol) without return types