pytest-参数化

参数化

pytest使用parametrize标记实现参数化

@pytest.mark.parametrize(argnames,argvalues)

parametrize()的第一个参数时用逗号分割的的字符串列表，第二个参数时一个值列表

#!/usr/bin/python3
#-*- conding:utf-8 -*-
import pytest 
import sys

@pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)])
def test_one(a,b):
    assert a == b

==================================== test session starts =====================================
platform linux -- Python 3.5.3, pytest-5.4.2, py-1.8.1, pluggy-0.13.1
rootdir: /media/_dde_data/python
collected 3 items                                                                            

test_001.py FF.                                                                        [100%]

========================================== FAILURES ==========================================
_______________________________________ test_one[1-2] ________________________________________

a = 1, b = 2

    @pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)])
    def test_one(a,b):
>       assert a == b
E       assert 1 == 2

test_001.py:8: AssertionError
_______________________________________ test_one[a-b] ________________________________________

a = 'a', b = 'b'

    @pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)])
    def test_one(a,b):
>       assert a == b
E       AssertionError: assert 'a' == 'b'
E         - b
E         + a

test_001.py:8: AssertionError
================================== short test summary info ===================================
FAILED test_001.py::test_one[1-2] - assert 1 == 2
FAILED test_001.py::test_one[a-b] - AssertionError: assert 'a' == 'b'
================================ 2 failed, 1 passed in 0.20s =================================

ids
参数化装饰器有一个额外的参数ids，可以标识每一个测试用例，自定义测试数据结果的显示，为了增加可读性，我们可以标记每一个测试用例使用的测试数据是什么，适当的增加一些说明

#!/usr/bin/python3
#-*- conding:utf-8 -*-
import pytest 
import sys

@pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)],ids=["1 != 2","a != b","False = False"])
def test_one(a,b):
    assert a == b

==================================== test session starts =====================================
platform linux -- Python 3.5.3, pytest-5.4.2, py-1.8.1, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: /media/_dde_data/python
collected 3 items                                                                            

test_001.py::test_one[1 != 2] FAILED                                                   [ 33%]
test_001.py::test_one[a != b] FAILED                                                   [ 66%]
test_001.py::test_one[False = False] PASSED                                            [100%]

========================================== FAILURES ==========================================
______________________________________ test_one[1 != 2] ______________________________________

a = 1, b = 2

    @pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)],ids=["1 != 2","a != b","False = False"])
    def test_one(a,b):
>       assert a == b
E       assert 1 == 2
E         +1
E         -2

test_001.py:8: AssertionError
______________________________________ test_one[a != b] ______________________________________

a = 'a', b = 'b'

    @pytest.mark.parametrize("a,b",[(1,2),('a','b'),(False,False)],ids=["1 != 2","a != b","False = False"])
    def test_one(a,b):
>       assert a == b
E       AssertionError: assert 'a' == 'b'
E         - b
E         + a

test_001.py:8: AssertionError
================================== short test summary info ===================================
FAILED test_001.py::test_one[1 != 2] - assert 1 == 2
FAILED test_001.py::test_one[a != b] - AssertionError: assert 'a' == 'b'
================================ 2 failed, 1 passed in 0.21s =================================