human
I wrote the below code

    FEATURE = '\n                Feature:    Steps    as    args\n                                Scenario:    Steps    as    args\n                                                When    I    define    this    one\n                '
    @step('When    I    define    this    one')
    def when_i_define_this_one(step):
        assert_equals(step.sentence, 'When    I    define    this    one')
    f = Feature.from_string(FEATURE)
    feature_result = f.run()
    scenario_result = feature_result.scenario_results[0]
    assert_equals(len(scenario_result.steps_passed), 1)
    assert_equals(scenario_result.total_steps, 1)

What's a good function header?
assistant
#Here's a good function header.

@with_setup(step_runner_environ)
def test_step_definitions_takes_the_step_object_as_first_argument():