编写测试用例

1、编写函数的测试用例

# 函数

def city_country(city,country,population=''):
    """描述城市和所属国家"""
    if population:
        full_message = city + "," + country + " - population " + population
    else:
        full_message =  city + "," + country
    return full_message.title()
# TestCase

import unittest
from city_function import city_country
class CityTestCase(unittest.TestCase):
    """测试city_function.py"""
    def test_city_country(self):
        """能够正确处理像Xian China 这样的城市名吗"""
        city_message = city_country('xian','china')
        self.assertEqual(city_message,'Xian,China')

    def test_city_country_population(self):
        """能够正确处理像Xian China -population 5000000 的值吗"""
        city_message = city_country('xian','china','500000')
        self.assertEqual(city_message,'Xian,China - Population 500000')
unittest.main

2、编写类的测试用例
#类

class Employee():
    """创建一个雇员类"""
    def __init__(self,first_name,givn_name,salary):
        """初始化雇员属性"""
        self.first_name=first_name
        self.givn_name=givn_name
        self .salary=salary

    def give_raise(self,incr_salary=5000):
        """增加年薪"""
        self.salary+=incr_salary
        return self.salary

#TestCase

import unittest
from employee_message import Employee
class TestEmployee(unittest.TestCase):
    """测试雇员类"""
    def setUp(self):
        """使用setUp方法对类进行实例化"""
        self.employee1 = Employee('du','gang',8000).give_raise()
        self.employee2 = Employee('du', 'gang', 8000).give_raise(2500)
    def test_default(self):
        """工资自增方式"""
        self.assertEqual(self.employee1,13000)

    def test_incre(self):
        """工资自定义"""
        self.assertEqual(self.employee2,10500)
unittest.main

3、unittest Module 中的断言方法

方法	用途
assertEqual(a,b)	核实a==b
assertNotEqual(a,b)	核实a!=b
assertTrue(x)	核实x为True
assertFlase(x)	核实x为False
assertIn(item,list)	核实item在list中
assertNotIn(item,list)	核实item不在list中