code: def test_predict(self, X_train, y_train, X_test, y_test):
      self.estimator.fit(X_train, y_train)
  
      y_pred = self.estimator.predict(X_test)
      self.assertAllEqual(y_pred, y_test)
  
imports: from geomstats.test_cases.learning._base import BaseEstimatorTestCase
label_desc: Use image node_id 1 for calling the KNearestNeighborsClassifierTestCase obj's underlying member method code with example usage: obj.test_predict(X_train, y_train, X_test, y_test) without return types