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如何为无参数方法自动生成测试用例？

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为了减少锅炉板代码，我想到了在类Tester中为所有无参数方法生成测试用例的想法 .

在运行py.test时，它只识别静态编写的测试用例（test_a，test_b），但不识别使用 setattr(Tester,'test_' + name, member) 动态创建的测试用例

也许py.test在调用setUpClass之前已经检查了类Tester的'test_ *'方法？任何提示如何运行？

import inspect
import unittest


class Testee:
    def a(self):
        print('a')

    def b(self):
        print('b')    

    #...

    #...
    def z(self):
        print('z')

class Tester(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        testee = Testee()
        for name, member in inspect.getmembers(object=testee, predicate=inspect.ismethod or inspect.iscoroutine):
            if len(inspect.signature(member).parameters):
                print(str(inspect.signature(member).parameters))
                setattr(Tester,'test_' + name, member)
            if inspect.isfunction(member) or inspect.ismethod(member):
                setattr(Tester,'test_' + name, member)
            elif inspect.iscoroutinefunction(member):
                setattr(Tester,'test_' + name, functools.partialmethod(TestInstrument.run_coro, member))
            else:
                print(member)
        return super().setUpClass()

    def test_a(self):
        Tester.testee.a()

    def test_b(self):
        Tester.testee.b()

=============================测试会话开始================= ============平台win32 - Python 3.5.1，pytest-2.9.2，py-1.4.31，pluggy-0.3.1 - c：\ program files \ python35 \ python . exe cachedir：.cache rootdir：C：\ tests，inifile：收集了两个项目sandbox.py::Tester::test_a PASSED sandbox.py::Tester::test_b PASSED ============= ============= 2在0.03秒内通过===========================

EDIT ：如果我将setupClass中的代码移动到全局作用域（类外），则py.test会检测并运行自动生成的测试用例 .

python pytest

1 回答

  • 0

    要详细说明我的'EDIT'，一个选择就是这样 . 我对解决方案不满意，因为全局代码执行会对副作用和其他微妙的错误开放 . 关于如何将其纳入类 Tester 范围的任何建议？

    import inspect
import unittest
import functools
def auto_generate_test_cases(Tester, Testee):
    def run(self, fn):
        fn(Tester._testee)
    for name, member in inspect.getmembers(
        object=Testee, predicate=inspect.isfunction or inspect.iscoroutine):
        if len(inspect.signature(member).parameters) == 1:            
            setattr(Tester,'test_' + name, functools.partialmethod(run, member))

class Testee:
    def __init__(self):
        self._a = 'a'
    def a(self):
        print(self._a)
    def ab(self, a, b):
        print('a')
    def b(self):
        print('b')    
    def h(self):
        print('h')    
    async def q(self):
        print('async q')
    #...

    #...
    def z(self):
        print('z')

class Tester(unittest.TestCase):
    _testee = Testee()
auto_generate_test_cases(Tester, Testee)

    py.test. output:

    C:\tests>py.test sandbox.py --verbose
============================= test session starts =============================
platform win32 -- Python 3.5.1, pytest-2.9.2, py-1.4.31, pluggy-0.3.1 -- c:\program files\python35\python.exe
cachedir: .cache
rootdir: C:\\tests, inifile:
collected 5 items

sandbox.py::Tester::test_a PASSED
sandbox.py::Tester::test_b PASSED
sandbox.py::Tester::test_h PASSED
sandbox.py::Tester::test_q PASSED
sandbox.py::Tester::test_z PASSED

========================== 5 passed in 0.07 seconds ===========================
    回复于

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