python编程：单元测试

'''
Created on 2018年7月16日

@author: SYSTEM
'''
import unittest
class Dict(dict):
    def __init__(self, **kw):
        super(Dict, self).__init__(**kw)

    def __getattr__(self, key):
        try:
            return self[key]
        except KeyError:
            raise AttributeError(r"'Dict' object has no attribute '%s'" % key)

    def __setattr__(self, key, value):
        self[key] = value




class TestDict(unittest.TestCase):
    def test_init(self):
        d = Dict(a=1, b='test')
        self.assertEqual(d.a, 1)  # 判断d.a是否等于1
        self.assertEqual(d.b, 'test')  # 判断d.b是否等于test
        self.assertTrue(isinstance(d, dict))  # 判断d是否是dict类型

    def test_key(self):
        d = Dict()
        d['key'] = 'value'
        self.assertEqual(d.key, 'value')

    def test_attr(self):
        d = Dict()
        d.key = 'value'
        self.assertTrue('key' in d)
        self.assertEqual(d['key'], 'value')

    def test_keyerror(self):
        d = Dict()
        with self.assertRaises(KeyError):  # 通过d['empty']访问不存在的key时，断言会抛出keyerror
            value = d['empty']

    def test_attrerror(self):
        d = Dict()
        with self.assertRaises(AttributeError):  # 通过d.empty访问不存在的key时，我们期待抛出AttributeError
            value = d.empty


if __name__ == '__main__':
    unittest.main()

输出

.....
----------------------------------------------------------------------
Ran 5 tests in 0.022s

OK