Question

我从一个简单的游戏练习单元测试和鼻子测试，我有一个游戏部分，有一个我需要测试的random.randint骰子。我一直在关注如何使用mock

测试随机事件

http://www.jjinux.com/2014/01/python-lightning-quick-introduction-to.html

我在运行nosetests时遇到此错误

ERROR: tests.ex47_tests.test_dice_roll
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/usr/local/lib/python2.7/site-packages/mock/mock.py", line 1297, in patched
    arg = patching.__enter__()
  File "/usr/local/lib/python2.7/site-packages/mock/mock.py", line 1353, in __enter__
    self.target = self.getter()
  File "/usr/local/lib/python2.7/site-packages/mock/mock.py", line 1520, in <lambda>
    getter = lambda: _importer(target)
  File "/usr/local/lib/python2.7/site-packages/mock/mock.py", line 1210, in _importer
    thing = _dot_lookup(thing, comp, import_path)
  File "/usr/local/lib/python2.7/site-packages/mock/mock.py", line 1199, in _dot_lookup
    __import__(import_path)
ImportError: No module named random

我已经随机导入，所以不确定为什么它不起作用或者这与模拟有关吗？

以下是游戏文件和测试文件中的代码部分（我没有把所有代码放在这里，因为我认为不需要）

game.py

class Intro(Rooms):

def enter(self):
    print "Intro room"

    print "You see the Gothon, you have to fight him!"

def dice_roll_fight(self):
    print 'DICE ROLL'

    dice_roll = randint(1,6)
    print "You rolled a ", dice_roll
    if dice_roll <= 2:
        return 'death'

    elif dice_roll >= 3:
        return 'starter'

    else:

        print "ERROR try again"

ex47_tests.py

from nose.tools import *
from ex47.game import Intro
from mock import mock
import random


@mock.patch('ex47.game.random.randint')
def test_dice_roll(randint_mock):
randint_mock.return_value = 1
assert_equal(game.dice_roll_fight(), 'death')


@mock.patch('ex47.game.random.randint')
def test_dice_roll(randint_mock):
randint_mock.return_value = 2
assert_equal(game.dice_roll_fight(), 'death')

@mock.patch('ex47.game.random.randint')
def test_dice_roll(randint_mock):
randint_mock.return_value = 3
assert_equal(game.dice_roll_fight(), 'starter')

Answer 1

根据您在rand_int课程中如何调用Intro，您可能会以这种方式导入：

from random import randint

在这种情况下，您的修补应该是这样的：

@mock.patch('ex47.game.randint')

你打补丁的方式：

@mock.patch('ex47.game.random.randint')

表示您是这样导入的：

import random

此外，我在测试代码中看到了一些问题。

您在测试中随机导入。你不应该这样做。您正在修补（根据您正在测试的内容进行修补），因此您无需随机导入，因为您将根据game模块正确修补随机方法。
看起来你试图在没有实际实例化你的类的情况下调用你的方法。如果您还没有，则应将测试设置为：

class ThisIsMyTest(unittest.TestCase): def setUp(self): self.game = Intro()
您的测试方法的名称都相同。这将最终只运行一个测试，您将不会收到您想要测试的其他结果。

考虑到上述三个提及，以下代码应足以帮助您进行单元测试：

import unittest
from nose.tools import assert_equal
from game import Intro
from mock import mock


class GameTest(unittest.TestCase):

    def setUp(self):
        self.game = Intro()

    @mock.patch('game.randint')
    def test_dice_roll_one(self, randint_mock):
        randint_mock.return_value = 1
        from nose.tools import assert_equal
        assert_equal(self.game.dice_roll_fight(), 'death')

    @mock.patch('game.randint')
    def test_dice_roll_two(self, randint_mock):
        randint_mock.return_value = 2
        assert_equal(self.game.dice_roll_fight(), 'death')

    @mock.patch('game.randint')
    def test_dice_roll_three(self, randint_mock):
        randint_mock.return_value = 3
        assert_equal(self.game.dice_roll_fight(), 'starter')


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

在nosetest中随机不使用mock

1 个答案: