# unittest单元测试
import unittest
from class_demo import Car

class TestCar(unittest.TestCase):
    ‘‘‘测试Car类‘‘‘

    def setUp(self):
        ‘‘‘初始化数据‘‘‘
        self.car_obj = Car(‘Audi‘, ‘A6‘, 2017)

    def test_set_odometer(self):
        ‘‘‘测试Car类的set_odometer方法‘‘‘
        self.car_obj.set_odometer(1000)
        self.assertEqual(1000, self.car_obj.odometer)

    def test_set_odometer_wrong(self):
        self.car_obj.set_odometer(5000)
        self.assertEqual(1000, self.car_obj.odometer)

assertEqual(a, b)       核实a = b
assertNotEqual(a, b)    核实a != b
assertTrue(x)           核实x为True
assertFalse(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