'Test that the dropping policy does not change things before it should.'

def test_dropping_grades_normally(self):

    self.dropping_setup()
    self.dropping_homework_stage1()
    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.earned_hw_scores(), [1.0, 2.0, 0])
    self.check_grade_percent(0.75)
