一.DDT简介

Data Driven Testing，数据驱动，简单来说就是测试数据的参数化

Python数据驱动模块DDT，包含类的装饰器ddt和两个方法装饰器data（直接输入测试数据）

通常情况下，data中的数据按照一个参数传递给测试用例，如果data中含有多个数据，以元组，列表，字典等数据，需要自行在脚本中对数据进行分解或者使用unpack分解数据。

@data(*参数)

拆分参数为多个，运行多次用例

@data(a,b)

那么a和b各运行一次用例

@data([a,d],[c,d])

如果没有@unpack，那么[a,b]当成一个参数传入用例运行

如果有@unpack，那么[a,b]被分解开，按照用例中的两个参数传递

二、安装DDT

pip install ddt

三、导入模块

import requests,json,unittest
from ddt import ddt,data,unpack

四、案例

@ddt
@data(参数)实验证明：
1、@data可传列表、元祖、字典
2、@data（参数）时，是把参数当做一个变量传入处理的#data是元祖import requests,json,unittest
from ddt import ddt,data,unpack
@ddt
class Test(unittest.TestCase):name=(('橙子','橘子'),('柠檬','柚子'))@data(name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
.
----------------------------------------------------------------------
Ran 1 test in 0.000sOK
(('橙子', '橘子'), ('柠檬', '柚子'))Process finished with exit code 0#data是列表@ddt
class Test(unittest.TestCase):name=[['橙子','橘子'],['柠檬','柚子']]@data(name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
[['橙子', '橘子'], ['柠檬', '柚子']]
.
----------------------------------------------------------------------
Ran 1 test in 0.000sOKProcess finished with exit code 0#data是字典@ddt
class Test(unittest.TestCase):name={'name':'王荔','age':11}@data(name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
.
{'name': '王荔', 'age': 11}
----------------------------------------------------------------------
Ran 1 test in 0.000sOKProcess finished with exit code 0

@ddt
@data(*参数)实验证明：
1、@data可传列表、元祖、字典
2、@data（*参数）时，是把参数拆分成多个迭代次数import requests,json,unittest
from ddt import ddt,data,unpack
@ddt
class Test(unittest.TestCase):name=(('橙子','橘子'),('柠檬','柚子'))@data(*name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
..
('橙子', '橘子')
----------------------------------------------------------------------
('柠檬', '柚子')
Ran 2 tests in 0.000sOKProcess finished with exit code 0@ddt
class Test(unittest.TestCase):name=[['橙子','橘子'],['柠檬','柚子']]@data(*name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
..
['橙子', '橘子']
----------------------------------------------------------------------
['柠檬', '柚子']
Ran 2 tests in 0.000sOKProcess finished with exit code 0@ddt
class Test(unittest.TestCase):name=[{'name':'王荔','age':11},{'name':'王荔','age':11}]@data(*name)def test(self,name):print(name)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
..
{'age': 11, 'name': '王荔'}
{'age': 11, 'name': '王荔'}
----------------------------------------------------------------------
Ran 2 tests in 0.001sOKProcess finished with exit code 0

@ddt
@data(*参数)
@unpack实验证明：
1、@data可传列表、元祖、字典
2、@data（*参数）时，是把参数拆分成多个迭代次数
3、@unpack 是把参数拆分成多个参数传入import requests,json,unittest
from ddt import ddt,data,unpack
@ddt
class Test(unittest.TestCase):name=(('橙子','橘子'),('柠檬','柚子'))@data(*name)@unpackdef test(self,name1,name2):print(name1,name2)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
橙子 橘子
柠檬 柚子
..
----------------------------------------------------------------------
Ran 2 tests in 0.000sOKProcess finished with exit code 0@ddt
class Test(unittest.TestCase):name=[['橙子','橘子'],['柠檬','柚子']]@data(*name)@unpackdef test(self,name1,name2):print(name1,name2)
if __name__=='__main__':unittest.main()"C:\Program Files\Python35\python.exe" C:/Users/wangli/PycharmProjects/Test/Test/test.py
..
橙子 橘子
----------------------------------------------------------------------
Ran 2 tests in 0.001sOK
柠檬 柚子Process finished with exit code 0