pytest文档53-命令行实时输出错误信息(pytest-instafail)
2024-09-07 23:38:31
前言
pytest 运行全部用例的时候，在控制台会先显示用例的运行结果(.或F), 用例全部运行完成后最后把报错信息全部一起抛出到控制台。
这样我们每次都需要等用例运行结束，才知道为什么报错，不方便实时查看报错信息。
pytest-instafail 插件可以在运行用例的时候，需实时查看用例报错内容，这样方便跟踪问题。
--instafail
执行全部用例，报错内容等用例运行完成才显示出来
>pytest
============================= test session starts =============================
collected 11 items
test_s.py .. [ 18%]
test_t.py ... [ 45%]
test_x.py .F.F [ 81%]
test_y.py .. [100%]
================================== FAILURES ===================================
___________________________________ test_02 ___________________________________
def test_02():
a = "hello"
b = "hello world"
> assert a == b
E AssertionError: assert 'hello' == 'hello world'
E - hello
E + hello world
test_x.py:12: AssertionError
___________________________________ test_04 ___________________________________
def test_04():
a = "hello"
b = "hello world"
> assert a not in b
E AssertionError: assert 'hello' not in 'hello world'
E 'hello' is contained here:
E hello world
test_x.py:24: AssertionError
===================== 2 failed, 9 passed in 1.32 seconds ======================
当用例很多的时候，不方便我们查看具体哪个报错对应哪条用例，加上--instafail参数，方便实时查看报错内容
>pytest --instafail
============================= test session starts =============================
collected 11 items
test_s.py .. [ 18%]
test_t.py ... [ 45%]
test_x.py .F
___________________________________ test_02 ___________________________________
def test_02():
a = "hello"
b = "hello world"
> assert a == b
E AssertionError: assert 'hello' == 'hello world'
E - hello
E + hello world
test_x.py:12: AssertionError
test_x.py .F
___________________________________ test_04 ___________________________________
def test_04():
a = "hello"
b = "hello world"
> assert a not in b
E AssertionError: assert 'hello' not in 'hello world'
E 'hello' is contained here:
E hello world
test_x.py:24: AssertionError
test_y.py .. [100%]
===================== 2 failed, 9 passed in 1.37 seconds ======================
结合--tb=line参数，看起来更直观
>pytest --instafail --tb=line
============================= test session starts =============================
collected 11 items
test_s.py .. [ 18%]
test_t.py ... [ 45%]
test_x.py .F
D:\test_x.py:12: AssertionError: assert 'hello' == 'hello world'
test_x.py .F
D:\test_x.py:24: AssertionError: assert 'hello' not in 'hello world'
test_y.py .. [100%]
===================== 2 failed, 9 passed in 1.30 seconds ======================
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