pytest学习和使用19-pytest断言失败后，怎样保持后续的断言继续执行？（pytest-assume）
2024-05-24 00:34:05
19-pytest断言失败后，怎样保持后续的断言继续执行？（pytest-assume）
- 1 引入
- 2 pytest-assume安装
- 3 assert断言
- 4 pytest-assume断言
1 引入
pytest使用assert进行断言，如果有多个断言，第一个失败了，那么后续的断言将不会执行；- 那么如果第一个断言失败了，还想继续保持执行后边的断言，那如何做？
- 我们可以使用
pytest-assume来解决这个问题，即使用多重断言插件。
2 pytest-assume安装
pip3 install pytest-assume
C:\Users\Administrator>pip3 install pytest-assume
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting pytest-assumeDownloading https://pypi.tuna.tsinghua.edu.cn/packages/e8/5d/ecd54af3d3dc3f69e9cf527449a51bd5ca39cd47aaeab9a74e55603a9ce1/pytest_assume-2.4.3-py3-none-any.whl (6.0 kB)
Requirement already satisfied: pytest>=2.7 in d:\python37\lib\site-packages (from pytest-assume) (6.2.4)
Requirement already satisfied: six in d:\python37\lib\site-packages (from pytest-assume) (1.15.0)
Requirement already satisfied: importlib-metadata>=0.12 in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (2.1.1)
Requirement already satisfied: atomicwrites>=1.0 in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (1.4.0)
Requirement already satisfied: toml in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (0.10.2)
Requirement already satisfied: pluggy<1.0.0a1,>=0.12 in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (0.13.1)
Requirement already satisfied: py>=1.8.2 in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (1.10.0)
Requirement already satisfied: colorama in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (0.4.4)
Requirement already satisfied: iniconfig in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (1.1.1)
Requirement already satisfied: packaging in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (20.8)
Requirement already satisfied: attrs>=19.2.0 in d:\python37\lib\site-packages (from pytest>=2.7->pytest-assume) (20.3.0)
Requirement already satisfied: zipp>=0.5 in d:\python37\lib\site-packages (from importlib-metadata>=0.12->pytest>=2.7->pytest-assume) (1.2.0)
Requirement already satisfied: pyparsing>=2.0.2 in d:\python37\lib\site-packages (from packaging->pytest>=2.7->pytest-assume) (2.4.7)
Installing collected packages: pytest-assume
Successfully installed pytest-assume-2.4.3
3 assert断言
- 先看
pytest自带的assert断言效果：
# -*- coding:utf-8 -*-
# 作者：虫无涯
# 日期：2023/3/16
# 文件名称：test_assume.py
# 作用：pytest-assume插件的使用
# 联系：VX(NoamaNelson)
# 博客：https://blog.csdn.net/NoamaNelsonimport pytestdef test_case():a = 100b = 200assert a + b < 100assert a - b > 0assert a * b == 20000assert a / b == 200assert (b - a) / a == 1if __name__ == '__main__':pytest.main(["-s", "test_assume.py"])- 运行结果如下，可以看到第一个断言失败后，后边的断言是无法进行的：
collecting ... collected 1 itemtest_assume.py::test_case FAILED [100%]
test_case\test_j\test_assume.py:8 (test_case)
def test_case():a = 100b = 200
> assert a + b < 100
E assert (100 + 200) < 100test_assume.py:12: AssertionError断言失败断言失败================================== FAILURES ===================================
__________________________________ test_case __________________________________def test_case():a = 100b = 200
> assert a + b < 100
E assert (100 + 200) < 100test_assume.py:12: AssertionError
=========================== short test summary info ===========================
FAILED test_assume.py::test_case - assert (100 + 200) < 100
============================== 1 failed in 0.15s ==============================
4 pytest-assume断言
- 代码如下：
# -*- coding:utf-8 -*-
# 作者：虫无涯
# 日期：2023/3/16
# 文件名称：test_assume.py
# 作用：pytest-assume插件的使用
# 联系：VX(NoamaNelson)
# 博客：https://blog.csdn.net/NoamaNelsonimport pytest# def test_case():
# a = 100
# b = 200
# assert a + b < 100
# assert a - b > 0
# assert a * b == 20000
# assert a / b == 200
# assert (b - a) / a == 1def test_case01():a = 100b = 200pytest.assume(a + b < 100)pytest.assume(a - b > 0)pytest.assume(a * b == 20000)pytest.assume(a / b == 200)pytest.assume((b - a) / a == 1)print("执行到这了~~~~~~~~~~")if __name__ == '__main__':pytest.main(["-s", "test_assume.py"])- 执行结果如下，可以看到前边有断言失败的，后边的断言是继续进行的：
test_assume.py::test_case01 FAILED [100%]执行到这了~~~~~~~~~~test_case\test_j\test_assume.py:21 (test_case01)
tp = <class 'pytest_assume.plugin.FailedAssumption'>, value = None, tb = Nonedef reraise(tp, value, tb=None):try:if value is None:value = tp()if value.__traceback__ is not tb:
> raise value.with_traceback(tb)
E pytest_assume.plugin.FailedAssumption:
E 3 Failed Assumptions:
E
E test_assume.py:25: AssumptionFailure
E >> pytest.assume(a + b < 100)
E AssertionError: assert False
E
E test_assume.py:26: AssumptionFailure
E >> pytest.assume(a - b > 0)
E AssertionError: assert False
E
E test_assume.py:28: AssumptionFailure
E >> pytest.assume(a / b == 200)
E AssertionError: assert FalseD:\Python37\lib\site-packages\six.py:702: FailedAssumption断言失败断言失败================================== FAILURES ===================================
_________________________________ test_case01 _________________________________tp = <class 'pytest_assume.plugin.FailedAssumption'>, value = None, tb = Nonedef reraise(tp, value, tb=None):try:if value is None:value = tp()if value.__traceback__ is not tb:
> raise value.with_traceback(tb)
E pytest_assume.plugin.FailedAssumption:
E 3 Failed Assumptions:
E
E test_assume.py:25: AssumptionFailure
E >> pytest.assume(a + b < 100)
E AssertionError: assert False
E
E test_assume.py:26: AssumptionFailure
E >> pytest.assume(a - b > 0)
E AssertionError: assert False
E
E test_assume.py:28: AssumptionFailure
E >> pytest.assume(a / b == 200)
E AssertionError: assert FalseD:\Python37\lib\site-packages\six.py:702: FailedAssumption
---------------------------- Captured stdout call -----------------------------
执行到这了~~~~~~~~~~
=========================== short test summary info ===========================
FAILED test_assume.py::test_case01 - pytest_assume.plugin.FailedAssumption:
============================== 1 failed in 0.17s ==============================
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