code: def test_potato_1channel(get_mats):
      n_matrices, n_channels = 6, 1
      covmats_1chan = get_mats(n_matrices, n_channels, "spd")
      pt = Potato()
      pt.fit_transform(covmats_1chan)
      pt.predict(covmats_1chan)
      pt.predict_proba(covmats_1chan)
  
imports: from conftest import get_metrics
  import numpy
  from numpy.testing import assert_array_equal
  import pytest
  from pyriemann.clustering import Kmeans, KmeansPerClassTransform, Potato, PotatoField
label_desc: Use image node_id 8 for calling a global function with example usage: test_potato_1channel(get_mats) without return types