python作业06代码测试

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Description (test)

Select from exercise 11-1 to 11-3

Code (test)

11-1

in city_functions.py:

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def city_functions( city, country):
    return city+', '+country

in test module:

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# 11-1 城市和国家 ：编写一个函数，它接受两个形参：一个城市名和一个国家名。这个函数返回一个格式为City, Country 的字符串，
# 如Santiago, Chile 。将这个函数存储在一个名为city_functions.py的模块中。创建一个名为test_cities.py的程序，对刚编写的函
# 数进行测试（别忘了，你需要导入模块unittest 以及要测试的函数）。编写一个名为test_city_country() 的方法，核实使用类似于
# 'santiago' 和'chile' 这样的值来调用前述函数时，得到的字符串是正确的。运行test_cities.py ，确认测试test_city_country() 通过了。

import unittest
from city_functions import city_functions

class CityCountryTestCase( unittest.TestCase):

    def test_city_functions(self):
        res = city_functions('Santiago', 'Chile')
        self.assertEqual(res, 'Santiago, Chile')

result:

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Testing started at 13:15 ...
D:\pyproject\homework1\venv\Scripts\python.exe "C:\Program Files\JetBrains\PyCharm Community Edition 2017.3.3\helpers\pycharm\_jb_unittest_runner.py" --path D:/pyproject/homework1/11-1.py


Ran 1 test in 0.001s

OK
Launching unittests with arguments python -m unittest D:/pyproject/homework1/11-1.py in D:\pyproject\homework1

11-2

  • 修改前面的函数，使其包含第三个必不可少的形参population ，并返回一个格式为City, Country - population xxx 的字符串，
    如Santiago, Chile - population 5000000 。运行test_cities.py，确认测试test_city_country() 未通过。

in city_functions.py:

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def city_functions( city, country, population):
    return city + ', ' + country + ' - population ' + str(population)

in test module:

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import unittest
from city_functions import city_functions

class CityCountryTestCase( unittest.TestCase):

    def test_city_functions(self):
        res = city_functions('Santiago', 'Chile')
        self.assertEqual(res, 'Santiago, Chile')

result:

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Testing started at 13:25 ...
D:\pyproject\homework1\venv\Scripts\python.exe "C:\Program Files\JetBrains\PyCharm Community Edition 2017.3.3\helpers\pycharm\_jb_unittest_runner.py" --target 11-2.CityCountryTestCase.test_city_functions
Launching unittests with arguments python -m unittest 11-2.CityCountryTestCase.test_city_functions in D:\pyproject\homework1


Ran 1 test in 0.004s

FAILED (errors=1)

Error
Traceback (most recent call last):
  File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36-32\lib\unittest\case.py", line 59, in testPartExecutor
    yield
  File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36-32\lib\unittest\case.py", line 601, in run
    testMethod()
  File "D:\pyproject\homework1\11-2.py", line 12, in test_city_functions
    res = city_functions('Santiago', 'Chile')
TypeError: city_functions() missing 1 required positional argument: 'population'


Process finished with exit code 1

  • 修改上述函数，将形参population 设置为可选的。再次运行test_cities.py，确认测试test_city_country() 又通过了。
    再编写一个名为test_city_country_population() 的测试，核实可以使用类似于'santiago' 、'chile' 和'population=5000000' 这样的值来调用
    这个函数。再次运行test_cities.py，确认测试test_city_country_population() 通过了。

in city_functions.py:

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def city_functions( city, country, population=-1):
    if population == -1:
        return city + ', ' + country
    else:
        return city + ', ' + country + ' - population ' + str(population)

in test module:

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import unittest
from city_functions import city_functions

class CityCountryTestCase( unittest.TestCase):

    def test_city_functions(self):
        res = city_functions('Santiago', 'Chile')
        self.assertEqual(res, 'Santiago, Chile')

    def test_city_functions_population(self):
        res = city_functions('Santiago', 'Chile', 500000)
        self.assertEqual(res, 'Santiago, Chile - population 500000')

result:

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Testing started at 13:34 ...
D:\pyproject\homework1\venv\Scripts\python.exe "C:\Program Files\JetBrains\PyCharm Community Edition 2017.3.3\helpers\pycharm\_jb_unittest_runner.py" --path D:/pyproject/homework1/11-2.py
Launching unittests with arguments python -m unittest D:/pyproject/homework1/11-2.py in D:\pyproject\homework1


Ran 2 tests in 0.001s

OK

Process finished with exit code 0