code: def test_check_estimator_passed(estimator_class):
      """Test that check_estimator returns only passed tests for examples we know pass."""
      estimator_instance = estimator_class.create_test_instance()
  
      result_class = check_estimator(estimator_class, verbose=False)
      assert all(x == "PASSED" for x in result_class.values())
  
      result_instance = check_estimator(
          estimator_instance, verbose=False
      )
      assert all(x == "PASSED" for x in result_instance.values())
  
imports: import pytest
  from sktime.classification.dummy import DummyClassifier
  from sktime.forecasting.dummy import ForecastKnownValues
  from sktime.transformations.series.exponent import ExponentTransformer
  from sktime.utils.estimator_checks import check_estimator
label_desc: Use image node_id 1 for calling a global function with example usage: test_check_estimator_passed(estimator_class) without return types