Pytest之pytest-assume同用例多断言，断言1失败会执行后续代码及断言2

王大力测试进阶之路

发布于 2020-05-29 09:27:35

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发布于 2020-05-29 09:27:35

文章被收录于专栏：橙子探索测试

一般我们做自动化测试时，一个用例会写多个断言，当第一个断言失败后，后面的代码就不会执行了，于是我们引进了pytest-assume插件可以解决断言失败后继续断言的问题。

一、安装依赖包

pip install pytest-assume

二、使用assert进行断言

我们发现test_01用例中，第一个断言assert 0 == 1失败时，后面的代码不会再执行, print('执行test_01断言2')和assert 1 == 2未执行。

#!/usr/bin/env python
# _*_coding:utf-8_*_
import pytest
 
 
class Test(object):
 
    def test_01(self):
        """用例1"""
        print('执行test_01断言1')
        assert 0 == 1
        print('执行test_01断言2')
        assert 1 == 2
 
    def test_02(self):
        """用例2"""
        print('执行test_02断言1')
        assert 3 == 3
        print('执行test_02断言2')
        assert 4 == 4
 
 
 
 
if __name__ == '__main__':
    pytest.main(['-s', 'test_C_01.py'])
 
 
C:\Users\admin\AppData\Local\Programs\Python\Python37\python.exe C:/Users/admin/Desktop/代码/Test/test/test_C_01.py
============================= test session starts =============================
platform win32 -- Python 3.7.7, pytest-5.4.2, py-1.8.1, pluggy-0.13.1
rootdir: C:\Users\admin\Desktop\代码\Test\test
plugins: assume-2.2.1
收集的测试用例:[<Function test_01>, <Function test_02>]
排序后收集的测试用例:[<Function test_01>, <Function test_02>]
collected 2 items
 
test_C_01.py 执行test_01断言1
F执行test_02断言1
执行test_02断言2
.
 
================================== FAILURES ===================================
________________________________ Test.test_01 _________________________________
 
self = <test.test_C_01.Test object at 0x0000018C74AAEF48>
 
    def test_01(self):
        """用例1"""
        print('执行test_01断言1')
>       assert 0 == 1
E       assert 0 == 1
 
test_C_01.py:11: AssertionError
=========================== short test summary info ===========================
FAILED test_C_01.py::Test::test_01 - assert 0 == 1
========================= 1 failed, 1 passed in 0.06s =========================
 
Process finished with exit code 0

二、使用pytest.assume进行断言，用法pytest.assume(预期结果 == 实际结果)

我们发现test_01用例中，第一个断言pytest.assume(0 == 1)失败时，print('执行test_01断言2')和pytest.assume(1 == 2)仍执行了，说明同一个用例中使用pytest.assume进行断言，如果第一个断言失败了，后面的代码仍会继续执行。

#!/usr/bin/env python
# _*_coding:utf-8_*_
import pytest
 
 
class Test(object):
 
    def test_01(self):
        """用例1"""
        print('执行test_01断言1')
        pytest.assume(0 == 1)
        print('执行test_01断言2')
        pytest.assume(1 == 2)
 
    def test_02(self):
        """用例2"""
        print('执行test_02断言1')
        pytest.assume(3 == 3)
        print('执行test_02断言2')
        pytest.assume(4 == 4)
 
 
 
 
if __name__ == '__main__':
    pytest.main(['-s', 'test_C_01.py'])
 
 
C:\Users\admin\AppData\Local\Programs\Python\Python37\python.exe C:/Users/admin/Desktop/代码/Test/test/test_C_01.py
============================= test session starts =============================
platform win32 -- Python 3.7.7, pytest-5.4.2, py-1.8.1, pluggy-0.13.1
rootdir: C:\Users\admin\Desktop\代码\Test\test
plugins: assume-2.2.1
收集的测试用例:[<Function test_01>, <Function test_02>]
排序后收集的测试用例:[<Function test_01>, <Function test_02>]
collected 2 items
 
test_C_01.py 执行test_01断言1
执行test_01断言2
F执行test_02断言1
执行test_02断言2
.
 
================================== FAILURES ===================================
________________________________ Test.test_01 _________________________________
 
tp = <class 'pytest_assume.plugin.FailedAssumption'>, value = None, tb = None
 
    def 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               2 Failed Assumptions:
E               
E               test_C_01.py:12: AssumptionFailure
E               >>  pytest.assume(0 == 1)
E               AssertionError: assert False
E               
E               test_C_01.py:15: AssumptionFailure
E               >>  pytest.assume(1 == 2)
E               AssertionError: assert False
 
..\..\..\..\AppData\Roaming\Python\Python37\site-packages\six.py:702: FailedAssumption
=========================== short test summary info ===========================
FAILED test_C_01.py::Test::test_01 - pytest_assume.plugin.FailedAssumption: 
========================= 1 failed, 1 passed in 0.20s =========================
 
Process finished with exit code 0

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原始发表：2020-05-26，如有侵权请联系 cloudcommunity@tencent.com 删除

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