NameError 中的单元测试结果

Question

import unittest
from blackjack import Blackjack
from blackjack import Player


class TestCardGame(unittest.TestCase):
    bj = Blackjack(4)

    def test_choose_card(self):
        self.assertEqual(bj.choose_card(['A',1],0),'A')
        self.assertEqual(bj.choose_card(['A', 1], 1), 1)

    def test_return_card_val(self):
        self.assertEqual(bj.return_card_val(['A',1],'A'),11)
        self.assertEqual(bj.return_card_val(['A',1], 1), 1)

class TestPlayer(unittest.TestCase):
    pl = Player('Apple')

    def test_add_score(self):
        self.assertEqual(pl.add_score('A'), 11)

if __name__ == '__main__':
    unittest.main()

I get three NameErrors: NameError: name 'bj' is not defined Likewise for pl.

It seems I'm making a syntax error but I'm not sure where. First, I had missing arguments so I created instances of Blackjack and Player and now it doesn't seem to recognize the instances that I created.

Answer 1

You are calling them from a bound method so access them as instance/class variables, or in other words access them using self

import unittest
from blackjack import Blackjack
from blackjack import Player


class TestCardGame(unittest.TestCase):
    bj = Blackjack(4)

    def test_choose_card(self):
        self.assertEqual(self.bj.choose_card(['A',1],0),'A')
        self.assertEqual(self.bj.choose_card(['A', 1], 1), 1)

    def test_return_card_val(self):
        self.assertEqual(self.bj.return_card_val(['A',1],'A'),11)
        self.assertEqual(self.bj.return_card_val(['A',1], 1), 1)

class TestPlayer(unittest.TestCase):
    pl = Player('Apple')

    def test_add_score(self):
        self.assertEqual(self.pl.add_score('A'), 11)

if __name__ == '__main__':
    unittest.main()