转载自品略图书馆 http://www.pinlue.com/article/2020/09/0312/5711179354155.html

 

前言

pytest 使用命令行执行用例的时候，有些用例执行失败的时候，屏幕上会出现一大堆的报错内容，不方便快速查看是哪些用例失败。--tb=style 参数可以设置报错的时候回溯打印内容，可以设置参数(auto/long/short/line/native/no)

—tb=style

pytest -h 查看命令行参数，关于 --tb=style 参数的使用方式

>pytest -h --tb=style traceback print mode (auto/long/short/line/native/no).

style 的值可以设置6种打印模式：auto/long/short/line/native/no

—tb=no

先写个简单的pytest用例，让他断言报错

def test_01(): result = "hello" expected = "world" assert result == expected

命令行执行pytest test_tb.py 此时屏幕上会显示整个用例的回溯信息

test_tb.py F [100%] ================================== FAILURES =================================== ___________________________________ test_01 ___________________________________ def test_01(): result = "hello" expected = "world" > assert result == expected E AssertionError: assert "hello" == "world" E - hello E + world test_tb.py:8: AssertionError ========================== 1 failed in 0.08 seconds ===========================

加上 --tb=no 参数执行

test_tb.py F [100%] ========================== 1 failed in 0.05 seconds ===========================

--tb=no 是不显示报错的回溯内容

—tb=line

line 模式使用一行输出所有的错误信息

test_tb.py F [100%] ================================== FAILURES =================================== D:\soft\kecheng202004\demo\test_tb.py:8: AssertionError: assert "hello" == "world" ========================== 1 failed in 0.06 seconds ===========================

—tb=short

short 模式显示断言报错的位置，不显示用例前面的代码

test_tb.py F [100%] ================================== FAILURES =================================== ___________________________________ test_01 ___________________________________ test_tb.py:8: in test_01 assert result == expected E AssertionError: assert "hello" == "world" E - hello E + world ========================== 1 failed in 0.06 seconds ===========================

其它

—tb=auto 有多个用例失败的时候，只打印第一个和最后一个用例的回溯信息—tb=long 输出最详细的回溯信息—tb=short 输入assert的一行和系统判断内容—tb=line 使用一行显示错误信息—tb=native 只输出python标准库的回溯信息—tb=no 不显示回溯信息