'Tests that grade does not change when making the global homework grade minimum not unique.'

def test_dropping_nochange(self):

    self.dropping_setup()
    self.dropping_homework_stage1()
    self.submit_question_answer(self.hw3_names[0], {'2_1': 'Correct'})
    self.assertEqual(self.score_for_hw('homework1'), [1.0, 0.0])
    self.assertEqual(self.score_for_hw('homework2'), [1.0, 1.0])
    self.assertEqual(self.score_for_hw('homework3'), [1.0, 0.0])
    self.assertEqual(self.earned_hw_scores(), [1.0, 2.0, 1.0])
    self.check_grade_percent(0.75)
