pytest多重断言的实现

2023-02-14 12:01

短信预约 -IT技能 免费直播动态提醒

当我们写用例断言时，往往一个断言结果是不够的，所以需要加入多重断言，而多重断言，当断言中间出现断言结果False时，会中断后续的断言执行，会导致测试用例执行结果的准确性不高
使用pytest框架的插件pytest-assume, 实现用例执行时，其中一个断言失败后，执行后续的断言

安装：pip install pytest-assume

以下为使用示例：

import pytest
from pytest_assume.plugin import assume
  
class TestTwo:
    def test001(self):
        with assume:
            assert True
        with assume:
            assert 1 == 2
 
    def test002(self):
        assert 1 == 1
 
if __name__ == '__main__':
    pytest.main(['-v', 'test_002.py'])

我们很容易在以下信息中找出相应的日志信息：

在行有E标记的信息中，我们可以清晰看到提示 pytest_assume.plugin.FailedAssumption: 1 Failed Assumptions

collecting ... collected 2 items

test_002.py::TestTwo::test001 FAILED [ 50%]
test_002.py::TestTwo::test002 PASSED [100%]

================================== FAILURES ===================================
_______________________________ TestTwo.test001 _______________________________

self = <test_002.TestTwo object at 0x000001B24B284C40>

def test001(self):
with assume:
assert True
with assume:
> assert 1 == 2
E pytest_assume.plugin.FailedAssumption:
E 1 Failed Assumptions:
E
E test_002.py:10: AssumptionFailure
E >> assert 1 == 2
E AssertionError: assert 1 == 2
E +1
E -2

test_002.py:10: FailedAssumption
============================== warnings summary ===============================
D:\Python3.9.10\lib\site-packages\_pytest\config\__init__.py:1126
D:\Python3.9.10\lib\site-packages\_pytest\config\__init__.py:1126: PytestAssertRewriteWarning: Module already imported so cannot be rewritten: pytest_assume
self._mark_plugins_for_rewrite(hook)

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================== short test summary info ===========================
FAILED test_002.py::TestTwo::test001 - pytest_assume.plugin.FailedAssumption:
=================== 1 failed, 1 passed, 1 warning in 0.19s ====================

进程已结束，退出代码 0