pytest跟我练07-->fixtrue基础之ids参数

前言

     唯一能持久的竞争优势是胜过竞争对手的学习能力。——盖亚斯
     共勉，多花精力在学习上！

一、ids参数是什么？

• ids参数是配合fixture的params参数用的，如果没有设置params参数，那么ids毫无意义；
• ids参数是给每一项params参数设置自定义名称用的；
• params参数值包含的列表有多少项值，那么ids参数就必须对应有多少项值。

#二、ids参数应用

• 2.1 没带ids参数的示例

import pytest

user_list = ['xiaoming','xiaohong','xiaoli']
@pytest.fixture(params=user_list) 
def setUp(request):          
    return request.param

def testadd(setUp):
    print('
用户名：' + str(setUp))
    assert 1

if __name__=='__main__':
    pytest.main(["-v"])     #-v参数：输出用例详细的执行信息

以上代码执行结果：

/usr/local/bin/python3.8 /Users/lanyin/PycharmProjects/newdream/app_demo/blog_demo/test_demo_01.py
============================= test session starts ==============================
platform darwin -- Python 3.8.2, pytest-5.4.0, py-1.8.1, pluggy-0.13.1 -- /usr/local/bin/python3.8
cachedir: .pytest_cache
metadata: {'Python': '3.8.2', 'Platform': 'macOS-10.15.3-x86_64-i386-64bit', 'Packages': {'pytest': '5.4.0', 'py': '1.8.1', 'pluggy': '0.13.1'}, 'Plugins': {'ordering': '0.6', 'html': '2.1.0', 'allure-pytest': '2.8.11', 'metadata': '1.8.0'}, 'JAVA_HOME': '/Library/Java/JavaVirtualMachines/jdk1.8.0_91.jdk/Contents/Home'}
rootdir: /Users/liuqingjun/PycharmProjects/newdream/app_demo, inifile: pytest.ini
plugins: ordering-0.6, html-2.1.0, allure-pytest-2.8.11, metadata-1.8.0
collecting ... collected 3 items

test_demo_01.py::testadd[xiaoming] PASSED                                [ 33%]
test_demo_01.py::testadd[xiaohong] PASSED                                [ 66%]
test_demo_01.py::testadd[xiaoli] PASSED                                  [100%]

============================== 3 passed in 0.03s ===============================

• 2.2 带正主 ids参数 的示例

import pytest

user_list = ['xiaoming','xiaohong','xiaoli']
param_name = ['first_group_data','second_group_data','third_group_data']
@pytest.fixture(params=user_list,ids=param_name)
def setUp(request):
    return request.param

def testadd(setUp):
    print('
用户名：' + str(setUp))
    assert 1

if __name__=='__main__':
    pytest.main(["-v"])     #-v参数：输出用例详细的执行信息

以上代码执行结果：

/usr/local/bin/python3.8 /Users/lanyin/PycharmProjects/newdream/app_demo/blog_demo/test_demo_01.py
============================= test session starts ==============================
platform darwin -- Python 3.8.2, pytest-5.4.0, py-1.8.1, pluggy-0.13.1 -- /usr/local/bin/python3.8
cachedir: .pytest_cache
metadata: {'Python': '3.8.2', 'Platform': 'macOS-10.15.3-x86_64-i386-64bit', 'Packages': {'pytest': '5.4.0', 'py': '1.8.1', 'pluggy': '0.13.1'}, 'Plugins': {'ordering': '0.6', 'html': '2.1.0', 'allure-pytest': '2.8.11', 'metadata': '1.8.0'}, 'JAVA_HOME': '/Library/Java/JavaVirtualMachines/jdk1.8.0_91.jdk/Contents/Home'}
rootdir: /Users/liuqingjun/PycharmProjects/newdream/app_demo, inifile: pytest.ini
plugins: ordering-0.6, html-2.1.0, allure-pytest-2.8.11, metadata-1.8.0
collecting ... collected 3 items

test_demo_01.py::testadd[first_group_data] PASSED                        [ 33%]
test_demo_01.py::testadd[second_group_data] PASSED                       [ 66%]
test_demo_01.py::testadd[third_group_data] PASSED                        [100%]

============================== 3 passed in 0.02s ===============================

上述两个实例小结：

• 可以从代码的输出结果看出ids参数的作用；
• 笔者这里认为其实设置与否对测试本身没有多大影响。