《Python编程 从入门到实践》第十一章习题选做

11-1 城市和国家
city_functions.py文件：def get_city(city_name, country_name):
full_name = city_name + ', ' + country_name
return full_name.title()test_cities.py文件：import unittest
from city_functions import get_city
class CityTestCase(unittest.TestCase):
def test_city_country(self):
formatted_name = get_city('beijing', 'china')
self.assertEqual(formatted_name, 'Beijing, China')

unittest.main()输出：.
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Ran 1 test in 0.004s

OK11-2 人口数量
city_functions.py文件：
def get_city(city_name, country_name, population):
full_name = city_name + ', ' + country_name + ' - ' + 'population' + str(
population)
return full_name.title()
test_cities.py文件：import unittest
from city_functions import get_city

class CityTestCase(unittest.TestCase):
def test_city_country(self):
formatted_name = get_city('beijing', 'china')
self.assertEqual(formatted_name, 'Beijing, China')

unittest.main()输出：E
======================================================================
ERROR: test_city_country (__main__.CityTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "c:\Users\HYA\Desktop\大二下\Python大二\python\chapter_11.py", line 7, in test_city_country
formatted_name = get_city('beijing', 'china')
TypeError: get_city() missing 1 required positional argument: 'population'

----------------------------------------------------------------------
Ran 1 test in 0.004s

FAILED (errors=1)修改之后
city_functions.py文件：
def get_city(city_name, country_name, population=''):
if population:
full_name = city_name + ', ' + country_name
full_name = full_name + ' - ' + 'population' + str(
population)
else:
full_name = city_name + ', ' + country_name
return full_name.title()
输出：.
----------------------------------------------------------------------
Ran 1 test in 0.000s

OK对test_cities.py文件进行修改：import unittest
from city_functions import get_city

class CityTestCase(unittest.TestCase):
def test_city_country(self):
formatted_name = get_city('beijing', 'china')
self.assertEqual(formatted_name, 'Beijing, China')

def test_city_country_population(self):
formatted_name = get_city('beijing', 'china', population=5
4000
00000)
str = 'Beijing, China - Population 500000'
self.assertEqual(formatted_name, str)

unittest.main()输出：..
----------------------------------------------------------------------
Ran 2 tests in 0.004s

OK11-3 雇员import unittest

class Employee():
def __init__(self, first_name, last_name, annual_salary):
self.first_name = first_name
self.last_name = last_name
self.annual_salary = annual_salary

def give_raise(self, increment=5000):
self.annual_salary += increment

class TestEmployee(unittest.TestCase):
def setUp(self):
self.a_employee = Employee('Li', 'Hua', 10000)
self.raises = [1000, 6000, 20000]

def test_give_default_raise(self):
self.a_employee.give_raise()
self.assertEqual(self.a_employee.annual_salary, 15000)

def test_give_custom_raise(self):
for item in self.raises:
self.a_employee.give_raise(item)
self.assertEqual(self.a_employee.annual_salary, 37000)

unittest.main()输出：..
----------------------------------------------------------------------
Ran 2 tests in 0.000s

OK