docstr: Test the shape of the vectorized covariance.
docstr_tok: ["Test","the","shape","of","the","vectorized","covariance","."]
code: def test_covec_shape(self):
      """Test the shape of the vectorized covariance."""
      n_elec = self.transformer.n_timeseries
      dim_vec = int(n_elec * (n_elec + 1) / 2)
      result_shape = (len(self.transformer.batches), dim_vec)
      shape = self.transformer.covecs.shape
      self.assertTrue(shape == result_shape)
  
file_path: geomstats/tests/tests_geomstats/test_datasets/test_prepare_emg_data.py
imports: import pytest
  import geomstats.backend
  from geomstats.datasets.prepare_emg_data import TimeSeriesCovariance
  from geomstats.datasets.utils import load_emg
  from geomstats.test.parametrizers import DataBasedParametrizer
  from geomstats.test.test_case import TestCase, np_and_autograd_only, pytorch_backend
  from .data.prepare_emg_data import TimeSeriesCovarianceTestData
label_desc: Use image node_id 3 for calling the TestTimeSeriesCovariance obj's underlying member method code with example usage: obj.test_covec_shape() without return types