一般我們做自動化測試時,一個用例會寫多個斷言,當第一個斷言失敗後,後面的代碼就不會執行了,於是我們引進了pytest-assume插件可以解決斷言失敗後繼續斷言的問題。
一、安裝依賴包
pip install pytest-assume
二、使用assert進行斷言
我們發現test_01用例中,第一個斷言assert 0 == 1失敗時,後面的代碼不會再執行, print('執行test_01斷言2')和assert 1 == 2未執行。
#!/usr/bin/env python
# _*_coding:utf-8_*_
import pytest
class Test(object):
def test_01(self):
"""用例1"""
print('執行test_01斷言1')
assert 0 == 1
print('執行test_01斷言2')
assert 1 == 2
def test_02(self):
"""用例2"""
print('執行test_02斷言1')
assert 3 == 3
print('執行test_02斷言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/代碼/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\代碼\Test\test
plugins: assume-2.2.1
收集的測試用例:[<Function test_01>, <Function test_02>]
排序後收集的測試用例:[<Function test_01>, <Function test_02>]
collected 2 items
test_C_01.py 執行test_01斷言1
F執行test_02斷言1
執行test_02斷言2
.
================================== FAILURES ===================================
________________________________ Test.test_01 _________________________________
self = <test.test_C_01.Test object at 0x0000018C74AAEF48>
def test_01(self):
"""用例1"""
print('執行test_01斷言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進行斷言,用法pytest.assume(預期結果 == 實際結果)
我們發現test_01用例中,第一個斷言pytest.assume(0 == 1)失敗時,print('執行test_01斷言2')和pytest.assume(1 == 2)仍執行了,說明同一個用例中使用pytest.assume進行斷言,如果第一個斷言失敗了,後面的代碼仍會繼續執行。
#!/usr/bin/env python
# _*_coding:utf-8_*_
import pytest
class Test(object):
def test_01(self):
"""用例1"""
print('執行test_01斷言1')
pytest.assume(0 == 1)
print('執行test_01斷言2')
pytest.assume(1 == 2)
def test_02(self):
"""用例2"""
print('執行test_02斷言1')
pytest.assume(3 == 3)
print('執行test_02斷言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/代碼/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\代碼\Test\test
plugins: assume-2.2.1
收集的測試用例:[<Function test_01>, <Function test_02>]
排序後收集的測試用例:[<Function test_01>, <Function test_02>]
collected 2 items
test_C_01.py 執行test_01斷言1
執行test_01斷言2
F執行test_02斷言1
執行test_02斷言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