Python pytest参数化装饰器不使用**kwargs

在我的测试代码中，我有以下内容：

@pytest.mark.parametrize(("title", "description", 'site'), [
                        ("abc", "this is a proper description","minecraft.net"),
                        ("proper title","short","minecraft.net"),
                        ("proper title", "this is a proper description","bol"),
                        ("","this is a proper description","minecraft.net"),
                        ("proper title","","minecraft.net"),
                        ("proper title","this is a proper description",""),
                        ("proper title","this is a proper description","ftp://myftp.nl")
        ])
@ae_test(loggedin = True)
def test_mod_model_create_validation(title, description,site):
    ... testing code ....

因此，parameterize函数尝试参数化我自己的

@ae_test

decorator返回的函数，如下所示：

def ae_test(prob=1.00,loggedin=False,is_admin=False):
    def create_wrapper(func):
        def run_test(*args,**kwargs):
            ... test setup code ...
            func(*args,**kwargs)
            ... test teardown code ...

到目前为止，这对我的所有测试都有效，但parameterize函数正在抱怨：

ValueError: <function run_test at 0x1029b55f0> has no argument 'title'

ValueError:没有参数“title”

此错误发生在第638行的pytest/python.py中

作为对第一条注释的响应，以下是完整的堆栈跟踪：

==================================== ERRORS ====================================
___________________ ERROR collecting test_content_models.py ____________________
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/runner.py:120: in __init__
>               self.result = func()
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/main.py:304: in _memocollect
>       return self._memoizedcall('_collected', lambda: list(self.collect()))
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/main.py:228: in _memoizedcall
>           res = function()
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/main.py:304: in <lambda>
>   return self._memoizedcall('_collected', lambda: list(self.collect()))
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:207: in collect
>                   res = self.makeitem(name, obj)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:218: in makeitem
>           collector=self, name=name, obj=obj)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/main.py:141: in call_matching_hooks
>       return hookmethod.pcall(plugins, **kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:425: in pcall
>       return self._docall(methods, kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:432: in _docall
>           res = mc.execute()
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:350: in execute
>           res = method(**kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:103: in pytest_pycollect_makeitem
>               return collector._genfunctions(name, obj)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:232: in _genfunctions
>       gentesthook.pcall(plugins, metafunc=metafunc)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:425: in pcall
>       return self._docall(methods, kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:432: in _docall
>           res = mc.execute()
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/core.py:350: in execute
>           res = method(**kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:37: in pytest_generate_tests
>           metafunc.parametrize(*p.args, **p.kwargs)
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_pytest/python.py:638: in parametrize
>                   raise ValueError("%r has no argument %r" %(self.function, arg))
E                   ValueError: <function run_test at 0x1029b55f0> has no argument 'title'
=========================== 1 error in 0.36 seconds ============================

========================================================================错误====================================
___________________收集测试内容时出错。\u models.py____________________
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/runner.py:120:in uu-init__
>self.result=func（）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/main.py:304:in
>返回self.\u memorizedCall（“'u collected'，lambda:list（self.collect（）））
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/main.py:228:in _-memorizedCall
>res=函数（）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/main.py:304:in
>返回self.\u memorizedCall（“'u collected'，lambda:list（self.collect（）））
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:207:in-collect
>res=self.makeitem（名称，obj）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:218:in-makeitem
>收集器=self，name=name，obj=obj）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/main.py:141:in-call_-matching_钩子
>返回hookmethod.pcall（插件，**kwargs）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:425:in-pcall
>返回self.\u docall（方法、kwargs）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:432:in _-docall
>res=mc.execute（）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:350:in-execute
>res=方法（**kwargs）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:103:in-pytest_-pycollect_-makeitem
>返回收集器。\u genfunctions（名称，obj）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:232:in _-genfunctions
>pcall（插件，metafunc=metafunc）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:425:in-pcall
>返回self.\u docall（方法、kwargs）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:432:in _-docall
>res=mc.execute（）
/Library/Python/2.7/site-packages/pytest-2.2.4-py2.7.egg/_-pytest/core.py:350:in-execute
>res=方法（**kwargs）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:37:in-pytest_-generate_测试
>元函数参数化（*p.args，**p.kwargs）
/Library/Python/2.7/site packages/pytest-2.2.4-py2.7.egg/_-pytest/Python.py:638:in参数化
>raise VALUERROR（“%r”没有参数%r“%（self.function，arg））
E ValueError:没有参数“title”
========================================0.36秒内出现1个错误============================

---

但问题实际上归结为

参数化

寻找一个名为“title”的参数，却找不到它。这是因为我使用**kw语法。我希望参数化函数只是在其中放入一个dict。

您最好使用decorator decorator将您的

aeu测试

decorator转换为保留签名的decorator：

from decorator import decorator

def ae_test(prob=1.00,loggedin=False,is_admin=False):
    @decorator
    def run_test(func, *args, **kwargs):
        ... test setup code ...
        func(*args,**kwargs)
        ... test teardown code ...
    return run_test

---

您最好使用decorator decorator将

ae\u测试

decorator转换为保留签名的decorator：

from decorator import decorator

def ae_test(prob=1.00,loggedin=False,is_admin=False):
    @decorator
    def run_test(func, *args, **kwargs):
        ... test setup code ...
        func(*args,**kwargs)
        ... test teardown code ...
    return run_test

---

它在哪里回溯到（错误发生在638，但这导致了什么），上面的一行？它在哪里回溯到（错误发生在638，但这导致了什么），上面的一行？我的

是否可以运行_test

函数保持

（*arg，**kwargs）

，因此它可以用于具有不同签名的函数？@sys.stderr绝对，

decorator.decorator

将捕获

create\u wrapper

的返回值，并恢复其签名，使其看起来像

func

@acatmur现在，在装饰

create\u wrapper

之后，我得到以下错误：“ypeError:create\u wrapprapper（）仅接受1个参数（给定4个）”。这是因为create_包装器只接受函数。我必须使用这三个嵌套函数语法才能将参数传递给我的装饰器。但是，将decorator one函数deeperr移动到实际接受4个参数的

run_test

，会导致此错误（我已经包括了发生此错误的代码行：

first=inspect.getargspec（caller）[0][0]#first arg E indexer:list index超出范围

@sys.stderr hmm，请看+1的说明“decorator.decoratordecorator decorator:”）我的

运行_test

函数能否保留

（*arg，**kwargs）

，因此它可以在具有不同签名的函数上使用？@sys.stderr绝对，

decorator.decorator

将捕获

create\u wrapper

的返回值，并还原其签名，使其看起来像

func

@acatmur现在，在装饰

create\u wrapper

之后，我得到以下错误：“ypeError:create\u wrapper（）只接受1个参数（4个给定）”。这是因为create\u wrapper只接受函数。我必须使用这三个嵌套函数语法才能将参数传递给我的decorator。但是，将decorator移动到一个函数deeperr，以

run\u test

实际接受4个参数，会导致此错误（我已经包括了发生这种情况的代码行：

first=inspect.getargspec（调用者）[0][0]#first-arg\n E indexer:list index out-range

@sys.stderr-hmm，请看+1中的“the

decor”一词