How to use the stepfunctions.steps.Catch function in stepfunctions

def test_catch_creation():
    catch = Catch(error_equals=['States.ALL'], next_step=Fail('End'))
    assert catch.to_dict() == {
        'ErrorEquals': ['States.ALL'],
        'Next': 'End'
    }

def test_retry_fail_for_unsupported_state():

    c1 = Choice('My Choice')
    
    with pytest.raises(ValueError):
        c1.add_catch(Catch(error_equals=["States.NoChoiceMatched"], next_step=Fail("ChoiceFailed")))

def test_task_state_creation():
    task_state = Task('Task', resource='arn:aws:lambda:us-east-1:1234567890:function:StartLambda')
    task_state.add_retry(Retry(error_equals=['ErrorA', 'ErrorB'], interval_seconds=1, max_attempts=2, backoff_rate=2))
    task_state.add_retry(Retry(error_equals=['ErrorC'], interval_seconds=5))
    task_state.add_catch(Catch(error_equals=['States.ALL'], next_step=Pass('End State')))
    assert task_state.type == 'Task'
    assert len(task_state.retries) == 2
    assert len(task_state.catches) == 1
    assert task_state.to_dict() == {
        'Type': 'Task',
        'Resource': 'arn:aws:lambda:us-east-1:1234567890:function:StartLambda',
        'Retry': [
            {
                'ErrorEquals': ['ErrorA', 'ErrorB'],
                'IntervalSeconds': 1,
                'BackoffRate': 2,
                'MaxAttempts': 2
            },
            {
                'ErrorEquals': ['ErrorC'],
                'IntervalSeconds': 5