如何为无参数方法自动生成测试用例？

Question

为了减少boiler-plate代码，我想出了在类测试仪中为所有无参数方法生成测试用例的想法。在

跑步时py.测试，它只识别静态编写的测试用例（测试a、测试b），而不识别使用setattr(Tester,'test_' + name, member)动态创建的测试用例

也许吧py.测试在调用setUpClass之前，是否已经用“test”检查了类测试程序中的方法？有什么提示吗？在

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()

============================= 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 2 items

sandbox.py::Tester::test_a PASSED sandbox.py::Tester::test_b PASSED

========================== 2 passed in 0.03 seconds ===========================

编辑：如果我将setupClass中的代码移动到全局范围（类之外），则py.测试检测并运行自动生成的测试用例。在

Answer 1

为了详细说明我的“编辑”，有一个选项是这样的。我对这个解决方案不满意，因为全局代码执行会产生副作用和其他细微的错误。关于如何将它放入类Tester范围有什么建议吗？在

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.测试. 输出：

^{pr2}$