code: def test_contracted_arsenal():
      """Test of contracted Arsenal on unit test data."""
      # load unit test data
      X_train, y_train = load_unit_test(split="train")
  
      # train contracted Arsenal
      arsenal = Arsenal(
          time_limit_in_minutes=0.25,
          contract_max_n_estimators=5,
          num_kernels=20,
          random_state=0,
      )
      arsenal.fit(X_train, y_train)
  
      assert len(arsenal.estimators_) >= 1
  
imports: import pytest
  from sktime.classification.kernel_based import Arsenal
  from sktime.datasets import load_unit_test
  from sktime.tests.test_switch import run_test_for_class
label_desc: Use image node_id 1 for calling a global function with example usage: test_contracted_arsenal() without return types