City and State 11-1: Write a function that takes two parameters: the name of a city and a country name. This function returns a string format City, Country, such as Santiago, Chile. This function is stored in a module called the city_functions.py.
Create a program called test_cities.py, and just write a function test (do not forget to import unittest module and function to be tested). Write named test_city_country () method, while using similar verification 'santiago' and 'chile' such value to call the function, resulting string is correct. Run test_cities.py, validation testing test_city_country () passed.
city_functions.py
def city_country(city, country): return city.title() + ', ' + country.title()
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test_cities.py
import unittestfrom city_functions import city_countryclass CityFunctionsTestCase(unittest.TestCase): """测试city_functions.py""" def test_city_country(self): """测试函数能够返回这样的字符串：Santiago, Chile""" c_c = city_country('santiago', 'chile') self.assertEqual(c_c, 'Santiago, Chile')if __name__ == "__main__": unittest.main()[url=][/url]
Run test_cities.py:
Ran 1 test in 0.002sOK
Confirmed test test_city_country () passed.
Population Number 11-2: front modification function, essential to include the third parameter Population, and returns a format City, Country - population xxx string, such as Santiago, Chile - population 5000000. Run test_cities.py, validation testing test_city_country () does not pass.
Modifying the above function, the parameter is set to optional population. Test_cities.py run again, validation testing test_city_country () passed.
And then write a name test_city_country_population () test, may be used to verify the value such as 'santiago', 'chile' and 'population = 5000000' call this function. Test_cities.py run again, validation testing test_city_country_population () passed.
city_functions.py
def city_country(city, country, population): return city.title() + '. ' + country.title() + '- population ' + str(population)
Modification function -> Run test_cities.py -> confirmation test test_city_country () failed.
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city_functions.py
def city_country(city, country, population=''): if population: return city.title() + ', ' + country.title() + ' - population ' + str(population) else: return city.title() + ', ' + country.title()[url=]
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Modify the function -> Run test_cities.py -> confirm test test_city_country () passed.
def test_city_country_population (self): "" "test function can return a string like: Santiago, Chile - population 5000000" "" c_c_p = city_country ( 'santiago', 'chile', population = 5000000) self.assertEqual (c_c_p, ' santiago, Chile - population 5000000 ')
Add test_cities.py in a named test_city_country_population () Test -> Run test_cities.py again -> confirm test test_city_country_population () passed.
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