def test_dont_modify_list(self):
array = [17, 42, 86, 23, 0, 69]
hs = HighScores(array)
hs.personal_best() # don't need to use it
assert hs.scores == array
def test_scores_after_personal_best(self):
scores = [20, 70, 15, 25, 30]
expected = [20, 70, 15, 25, 30]
highscores = HighScores(scores)
highscores.personal_best()
self.assertEqual(highscores.scores, expected)
