pytest文档49-命令行参数--tb的使用
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
# test_tb.py # 作者-上海悠悠 QQ交流群:717225969 # blog地址 https://www.cnblogs.com/yoyoketang/ 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
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