'Test that the lowest is dropped for a perfect score.'

def test_dropping_all_correct(self):

    self.dropping_setup()
    self.dropping_homework_stage1()
    for name in self.hw3_names:
        self.submit_question_answer(name, {'2_1': 'Correct'})
    self.check_grade_percent(1.0)
    self.assertEqual(self.earned_hw_scores(), [1.0, 2.0, 2.0])
    self.assertEqual(self.score_for_hw('homework3'), [1.0, 1.0])
