Python Pytest装饰器@pytest.mark.parametrize详解

pytest中装饰器@pytest.mark.parametrize('参数名',list)可以实现测试用例参数化，类似ddt
如：@pytest.mark.parametrize('请求方式,接口地址,传参,预期结果',[('get','www.baidu.com','{"page":1}','{"code":0,"msg":"成功"})',('post','www.baidu.com','{"page":2}','{"code":0,"msg":"成功"}')])

1、第一个参数是字符串，多个参数中间用逗号隔开

2、第二个参数是list,多组数据用元祖类型;传三个或更多参数也是这样传。list的每个元素都是一个元组，元组里的每个元素和按参数顺序一一对应

3、传一个参数 @pytest.mark.parametrize('参数名'，list) 进行参数化

4、传两个参数@pytest.mark.parametrize('参数名1，参数名2'，[(参数1_data[0], 参数2_data[0]),(参数1_data[1], 参数2_data[1])]) 进行参数化

import pytest
#单参数单值
@pytest.mark.parametrize("user",["18221124104"])
def test(user):
    print(user)
    assert user=="18221124104"
 
"c:\program files\python35\python.exe" c:/users/wangli/pycharmprojects/test/test/test03.py
============================= test session starts =============================
platform win32 -- python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: c:\users\wangli\pycharmprojects\test\test
collected 1 item
 
test03.py 18221124104
.
 
============================== 1 passed in 0.15s ==============================
 
process finished with exit code 0
 
#单参数多值
@pytest.mark.parametrize("user",["18221124104","18200000000","18200000001"])
def test(user):
    print(user)
    assert user=="18221124104"
 
 
"c:\program files\python35\python.exe" c:/users/wangli/pycharmprojects/test/test/test03.py
============================= test session starts =============================
platform win32 -- python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: c:\users\wangli\pycharmprojects\test\test
collected 3 items
 
test03.py 18221124104
.18200000000
f18200000001
f
 
================================== failures ===================================
______________________________ test[18200000000] ______________________________
 
user = '18200000000'
 
    @pytest.mark.parametrize("user",["18221124104","18200000000","18200000001"])
    def test(user):
        print(user)
>       assert user=="18221124104"
e       assertionerror
 
test03.py:74: assertionerror
______________________________ test[18200000001] ______________________________
 
user = '18200000001'
 
    @pytest.mark.parametrize("user",["18221124104","18200000000","18200000001"])
    def test(user):
        print(user)
>       assert user=="18221124104"
e       assertionerror
 
test03.py:74: assertionerror
========================= 2 failed, 1 passed in 0.21s =========================
 
process finished with exit code 0

#多参数多值
@pytest.mark.parametrize("user,pwd",[("18221124104",111111),("18200000000",111111)])
def test(user,pwd):
    print(user,pwd)
  
"c:\program files\python35\python.exe" c:/users/wangli/pycharmprojects/test/test/test03.py
============================= test session starts =============================
platform win32 -- python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: c:\users\wangli\pycharmprojects\test\test
collected 2 items
 
test03.py 18221124104 111111
.18200000000 111111
.
 
============================== 2 passed in 0.03s ==============================
 
process finished with exit code 0
 
# 使用内置的mark.xfail标记为失败的用例就不运行了，直接跳过显示xfailed
@pytest.mark.parametrize("user,pwd",[("18221124104",111111),pytest.param("18200000000",111111,marks=pytest.mark.xfail)])
def test(user,pwd):
    print(user,pwd)
    assert user == "18221124104"
    assert pwd== 111111
  
"c:\program files\python35\python.exe" c:/users/wangli/pycharmprojects/test/test/test03.py
============================= test session starts =============================
platform win32 -- python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: c:\users\wangli\pycharmprojects\test\test
collected 2 items
 
test03.py 18221124104 111111
.18200000000 111111
x
 
======================== 1 passed, 1 xfailed in 0.14s =========================
 
process finished with exit code 0
 
#若要获得多个参数化参数的所有组合，可以堆叠参数化装饰器
@pytest.mark.parametrize("x", [0, 1])
@pytest.mark.parametrize("y", [2, 3])
def test_foo(x, y):
    print("测试数据组合：x->%s, y->%s" % (x, y))
 
if __name__=="__main__":
    pytest.main(["-s","test03.py"])
 
 
"c:\program files\python35\python.exe" c:/users/wangli/pycharmprojects/test/test/test03.py
============================= test session starts =============================
platform win32 -- python 3.5.2, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: c:\users\wangli\pycharmprojects\test\test
collected 4 items
 
test03.py 测试数据组合：x->0, y->2
.测试数据组合：x->1, y->2
.测试数据组合：x->0, y->3
.测试数据组合：x->1, y->3
.
 
============================== 4 passed in 0.03s ==============================
 
process finished with exit code 0

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