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 函数尝试参数化由我自己的 @ae_test 装饰器返回的函数，它看起来像这样:
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，但参数化函数有问题:
ValueError: <function run_test at 0x1029b55f0> has no argument 'title'
这个错误出现在pytest/python.py的第638行
为了回应第一条评论，这里是完整的堆栈跟踪:
==================================== 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 ============================
但问题实际上归结为 parameterize 寻找名为“title”的参数但没有找到它。那是因为我使用的是 **kw 语法。我希望 parameterize 函数只是将一个字典放在那里。
请您参考如下方法:
您最好使用 decorator.decorator decorator 装饰器将您的 ae_test 装饰器转换为保留签名的装饰器:
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
