code: def test_transform(self, X_train, y_train, X_test, expected, atol):
      self.estimator.fit(X_train, y_train)
  
      dists = self.estimator.transform(X_test)
      self.assertAllClose(dists, expected, atol=atol)
  
imports: from geomstats.test_cases.learning._base import BaseEstimatorTestCase
label_desc: Use image node_id 4 for calling the RiemannianMinimumDistanceToMeanTestCase obj's underlying member method code with example usage: obj.test_transform(X_train, y_train, X_test, expected, atol) without return types