text: """Unit tests for the examples."""
  
  import logging
  import os
  import sys
  import warnings
  
  import examples.empirical_frechet_mean_uncertainty_sn as empirical_frechet_mean_uncertainty_sn  # NOQA
  import examples.gradient_descent_s2 as gradient_descent_s2
  import examples.kalman_filter as kalman_filter
  import examples.learning_graph_structured_data_h2 as learning_gsd_h2
  import examples.loss_and_gradient_se3 as loss_and_gradient_se3
  import examples.loss_and_gradient_so3 as loss_and_gradient_so3
  import examples.plot_bch_so3 as plot_bch_so3
  import examples.plot_expectation_maximization_manifolds as plot_em_manifolds
  import examples.plot_geodesics_h2 as plot_geodesics_h2
  import examples.plot_geodesics_poincare_polydisk as plot_geodesics_poincare_polydisk # NOQA
  import examples.plot_geodesics_s2 as plot_geodesics_s2
  import examples.plot_geodesics_se2 as plot_geodesics_se2
  import examples.plot_geodesics_se3 as plot_geodesics_se3
  import examples.plot_geodesics_so3 as plot_geodesics_so3
  import examples.plot_grid_h2 as plot_grid_h2
  import examples.plot_kernel_density_estimation_classifier_s2 as plot_kernel_density_estimation_classifier_s2 # NOQA
  import examples.plot_kmeans_manifolds as plot_kmeans_manifolds
  import examples.plot_kmedoids_manifolds as plot_kmedoids_manifolds
  import examples.plot_knn_s2 as plot_knn_s2
  import examples.plot_mdm_spd as plot_mdm_spd
  import examples.plot_online_kmeans_s1 as plot_online_kmeans_s1
  import examples.plot_online_kmeans_s2 as plot_online_kmeans_s2
  import examples.plot_pole_ladder_s2 as plot_pole_ladder_s2
  import examples.plot_square_h2_klein_disk as plot_square_h2_klein_disk
  import examples.plot_square_h2_poincare_disk as plot_square_h2_poincare_disk
  import examples.plot_square_h2_poincare_half_plane as plot_square_h2_poincare_half_plane  # NOQA
  import examples.tangent_pca_h2 as tangent_pca_h2
  import examples.tangent_pca_s2 as tangent_pca_s2
  import examples.tangent_pca_so3 as tangent_pca_so3
  import matplotlib
  import matplotlib.pyplot as plt
  
  import geomstats.backend as gs
  import geomstats.tests
  
  matplotlib.use('Agg')  # NOQA
  
  
  class TestExamples(geomstats.tests.TestCase):
      @classmethod
      def setUpClass(cls):
          sys.stdout = open(os.devnull, 'w')
  
      @staticmethod
      def setUp():
          gs.random.seed(1234)
          logger = logging.getLogger()
          logger.disabled = True
          warnings.simplefilter('ignore', category=ImportWarning)
          warnings.simplefilter('ignore', category=UserWarning)
          plt.rcParams.update({'figure.max_open_warning': 0})
          plt.figure()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_empirical_frechet_mean_uncertainty_sn():
          empirical_frechet_mean_uncertainty_sn.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_gradient_descent_s2():
          gradient_descent_s2.main(max_iter=64, output_file=None)
  
      @staticmethod
      def test_loss_and_gradient_so3():
          loss_and_gradient_so3.main()
  
      @staticmethod
      def test_loss_and_gradient_se3():
          loss_and_gradient_se3.main()
  
      @staticmethod
      def test_kalman_filter():
          kalman_filter.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_learning_graph_structured_data_h2():
          learning_gsd_h2.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_bch_so3():
          plot_bch_so3.main()
  
      @staticmethod
      def test_plot_geodesics_h2():
          plot_geodesics_h2.main()
  
      @staticmethod
      def test_plot_geodesics_poincare_polydisk():
          plot_geodesics_poincare_polydisk.main()
  
      @staticmethod
      def test_plot_geodesics_s2():
          plot_geodesics_s2.main()
  
      @staticmethod
      def test_plot_geodesics_se3():
          plot_geodesics_se3.main()
  
      @staticmethod
      def test_plot_geodesics_so3():
          plot_geodesics_so3.main()
  
      @staticmethod
      def test_plot_grid_h2():
          plot_grid_h2.main()
  
      @geomstats.tests.np_and_pytorch_only
      @staticmethod
      def test_plot_mdm_spd():
          plot_mdm_spd.main()
  
      @staticmethod
      def test_plot_square_h2_square_poincare_disk():
          plot_square_h2_poincare_disk.main()
  
      @staticmethod
      def test_plot_square_h2_square_poincare_half_plane():
          plot_square_h2_poincare_half_plane.main()
  
      @staticmethod
      def test_plot_square_h2_square_klein_disk():
          plot_square_h2_klein_disk.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_tangent_pca_s2():
          tangent_pca_h2.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_tangent_pca_h2():
          tangent_pca_s2.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_tangent_pca_so3():
          tangent_pca_so3.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_kernel_density_estimation_classifier_s2():
          plot_kernel_density_estimation_classifier_s2.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_kmeans_manifolds():
          plot_kmeans_manifolds.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_kmedoids_manifolds():
          plot_kmedoids_manifolds.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_em_manifolds():
          plot_em_manifolds.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_knn_s2():
          plot_knn_s2.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_online_kmeans_s1():
          plot_online_kmeans_s1.main()
  
      @staticmethod
      @geomstats.tests.np_only
      def test_plot_online_kmeans_s2():
          plot_online_kmeans_s2.main()
  
      @staticmethod
      def test_plot_pole_ladder_s2():
          plot_pole_ladder_s2.main()
  
      @staticmethod
      def test_plot_geodesics_se2():
          plot_geodesics_se2.main()
  