将参数传递给灯具功能-Python 实用宝典

将参数传递给灯具功能

我正在使用py.test来测试包装在python类MyTester中的某些DLL代码。为了进行验证,我需要在测试期间记录一些测试数据,然后再进行更多处理。由于我有许多test _...文件,因此我想对大多数测试重用测试器对象的创建(例如MyTester的实例)。 由于tester对象是获得DLL变量和函数的引用的对象,因此我需要将DLL变量列表传递给每个测试文件的tester对象(要记录的变量对于test_是相同的。 。文件)。列表的内容将用于记录指定的数据。 我的想法是像这样做: import pytest class MyTester(): def __init__(self, arg = ["var0", "var1"]): self.arg = arg # self.use_arg_to_init_logging_part() def dothis(self): print "this" def dothat(self): print "that" # located in conftest.py (because other test will reuse it) @pytest.fixture() def tester(request): """ create tester object """ # how to use …

问题:将参数传递给灯具功能

我正在使用py.test来测试包装在python类MyTester中的某些DLL代码。为了进行验证,我需要在测试期间记录一些测试数据,然后再进行更多处理。由于我有许多test _...文件,因此我想对大多数测试重用测试器对象的创建(例如MyTester的实例)。

由于tester对象是获得DLL变量和函数的引用的对象,因此我需要将DLL变量列表传递给每个测试文件的tester对象(要记录的变量对于test_是相同的。 。文件)。列表的内容将用于记录指定的数据。

我的想法是像这样做:

import pytest

class MyTester():
    def __init__(self, arg = ["var0", "var1"]):
        self.arg = arg
        # self.use_arg_to_init_logging_part()

    def dothis(self):
        print "this"

    def dothat(self):
        print "that"

# located in conftest.py (because other test will reuse it)

@pytest.fixture()
def tester(request):
    """ create tester object """
    # how to use the list below for arg?
    _tester = MyTester()
    return _tester

# located in test_...py

# @pytest.mark.usefixtures("tester") 
class TestIt():

    # def __init__(self):
    #     self.args_for_tester = ["var1", "var2"]
    #     # how to pass this list to the tester fixture?

    def test_tc1(self, tester):
       tester.dothis()
       assert 0 # for demo purpose

    def test_tc2(self, tester):
       tester.dothat()
       assert 0 # for demo purpose

是否有可能实现这种目标,或者还有更优雅的方式?

通常,我可以使用某种设置功能(xUnit样式)针对每种测试方法执行此操作。但是我想获得某种重用。有谁知道灯具是否可以做到这一点?

我知道我可以做这样的事情:(来自文档)

@pytest.fixture(scope="module", params=["merlinux.eu", "mail.python.org"])

但是我需要直接在测试模块中进行参数化。 是否可以从测试模块访问灯具的params属性?

I am using py.test to test some DLL code wrapped in a python class MyTester. For validating purpose I need to log some test data during the tests and do more processing afterwards. As I have many test_... files I want to reuse the tester object creation (instance of MyTester) for most of my tests.

As the tester object is the one which got the references to the DLL's variables and functions I need to pass a list of the DLL's variables to the tester object for each of the test files (variables to be logged are the same for a test_... file). The content of the list is shall be used to log the specified data.

My idea is to do it somehow like this:

import pytest

class MyTester():
    def __init__(self, arg = ["var0", "var1"]):
        self.arg = arg
        # self.use_arg_to_init_logging_part()

    def dothis(self):
        print "this"

    def dothat(self):
        print "that"

# located in conftest.py (because other test will reuse it)

@pytest.fixture()
def tester(request):
    """ create tester object """
    # how to use the list below for arg?
    _tester = MyTester()
    return _tester

# located in test_...py

# @pytest.mark.usefixtures("tester") 
class TestIt():

    # def __init__(self):
    #     self.args_for_tester = ["var1", "var2"]
    #     # how to pass this list to the tester fixture?

    def test_tc1(self, tester):
       tester.dothis()
       assert 0 # for demo purpose

    def test_tc2(self, tester):
       tester.dothat()
       assert 0 # for demo purpose

Is it possible to achieve it like this or is there even a more elegant way?

Usually I could do it for each test method with some kind of setup function (xUnit-style). But I want to gain some kind of reuse. Does anyone know if this is possible with fixtures at all?

I know I can do something like this: (from the docs)

@pytest.fixture(scope="module", params=["merlinux.eu", "mail.python.org"])

But I need to the parametrization directly in the test module. Is it possible to access the params attribute of the fixture from the test module?


回答 0

更新:由于这是该问题的公认答案,并且有时仍然会被反对,因此我应该添加一个更新。尽管我的原始答案(如下)是在较旧版本的pytest中执行此操作的唯一方法,因为其他人已经指出 pytest现在支持对灯具进行间接参数化。例如,您可以执行以下操作(通过@imiric):

# test_parameterized_fixture.py
import pytest

class MyTester:
    def __init__(self, x):
        self.x = x

    def dothis(self):
        assert self.x

@pytest.fixture
def tester(request):
    """Create tester object"""
    return MyTester(request.param)


class TestIt:
    @pytest.mark.parametrize('tester', [True, False], indirect=['tester'])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1
$ pytest -v test_parameterized_fixture.py
================================================================================= test session starts =================================================================================
platform cygwin -- Python 3.6.8, pytest-5.3.1, py-1.8.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: .
collected 2 items

test_parameterized_fixture.py::TestIt::test_tc1[True] PASSED                                                                                                                    [ 50%]
test_parameterized_fixture.py::TestIt::test_tc1[False] FAILED

但是,尽管这种形式的间接参数化是明确的,但正如@Yukihiko Shinoda 指出的那样,它现在支持一种形式的隐式间接参数化(尽管我在官方文档中找不到对此的任何明显引用):

# test_parameterized_fixture2.py
import pytest

class MyTester:
    def __init__(self, x):
        self.x = x

    def dothis(self):
        assert self.x

@pytest.fixture
def tester(tester_arg):
    """Create tester object"""
    return MyTester(tester_arg)


class TestIt:
    @pytest.mark.parametrize('tester_arg', [True, False])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1
$ pytest -v test_parameterized_fixture2.py
================================================================================= test session starts =================================================================================
platform cygwin -- Python 3.6.8, pytest-5.3.1, py-1.8.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: .
collected 2 items

test_parameterized_fixture2.py::TestIt::test_tc1[True] PASSED                                                                                                                   [ 50%]
test_parameterized_fixture2.py::TestIt::test_tc1[False] FAILED

我不确切知道这种形式的语义是什么,但是似乎可以pytest.mark.parametrize识别出,尽管该test_tc1方法不接受名为的参数,但它使用tester_argtester夹具却可以,因此它通过tester夹具传递参数化的参数。


我有一个类似的问题-我有一个称为的夹具test_package,后来我希望能够在特定测试中运行该夹具时将可选参数传递给该夹具。例如:

@pytest.fixture()
def test_package(request, version='1.0'):
    ...
    request.addfinalizer(fin)
    ...
    return package

(对于这些目的,夹具是做什么的或返回的对象的类型无关紧要package)。

然后希望以某种方式在测试功能中使用此固定装置,这样我也可以指定该version固定装置的参数以用于该测试。尽管这可能是一个不错的功能,但目前尚不可能。

同时,很容易使我的夹具简单地返回一个函数,该函数完成夹具先前所做的所有工作,但允许我指定version参数:

@pytest.fixture()
def test_package(request):
    def make_test_package(version='1.0'):
        ...
        request.addfinalizer(fin)
        ...
        return test_package

    return make_test_package

现在,我可以在测试函数中使用它,例如:

def test_install_package(test_package):
    package = test_package(version='1.1')
    ...
    assert ...

等等。

OP的尝试解决方案朝着正确的方向发展,正如@ hpk42的答案所暗示的那样,MyTester.__init__可以仅存储对请求的引用,例如:

class MyTester(object):
    def __init__(self, request, arg=["var0", "var1"]):
        self.request = request
        self.arg = arg
        # self.use_arg_to_init_logging_part()

    def dothis(self):
        print "this"

    def dothat(self):
        print "that"

然后使用它来实现固定装置,例如:

@pytest.fixture()
def tester(request):
    """ create tester object """
    # how to use the list below for arg?
    _tester = MyTester(request)
    return _tester

如果需要,MyTester可以对类进行一些重构,以便.args在创建其属性后可以对其进行更新,以调整各个测试的行为。

Update: Since this the accepted answer to this question and still gets upvoted sometimes, I should add an update. Although my original answer (below) was the only way to do this in older versions of pytest as others have noted pytest now supports indirect parametrization of fixtures. For example you can do something like this (via @imiric):

# test_parameterized_fixture.py
import pytest

class MyTester:
    def __init__(self, x):
        self.x = x

    def dothis(self):
        assert self.x

@pytest.fixture
def tester(request):
    """Create tester object"""
    return MyTester(request.param)


class TestIt:
    @pytest.mark.parametrize('tester', [True, False], indirect=['tester'])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1
$ pytest -v test_parameterized_fixture.py
================================================================================= test session starts =================================================================================
platform cygwin -- Python 3.6.8, pytest-5.3.1, py-1.8.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: .
collected 2 items

test_parameterized_fixture.py::TestIt::test_tc1[True] PASSED                                                                                                                    [ 50%]
test_parameterized_fixture.py::TestIt::test_tc1[False] FAILED

However, although this form of indirect parametrization is explicit, as @Yukihiko Shinoda points out it now supports a form of implicit indirect parametrization (though I couldn't find any obvious reference to this in the official docs):

# test_parameterized_fixture2.py
import pytest

class MyTester:
    def __init__(self, x):
        self.x = x

    def dothis(self):
        assert self.x

@pytest.fixture
def tester(tester_arg):
    """Create tester object"""
    return MyTester(tester_arg)


class TestIt:
    @pytest.mark.parametrize('tester_arg', [True, False])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1
$ pytest -v test_parameterized_fixture2.py
================================================================================= test session starts =================================================================================
platform cygwin -- Python 3.6.8, pytest-5.3.1, py-1.8.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: .
collected 2 items

test_parameterized_fixture2.py::TestIt::test_tc1[True] PASSED                                                                                                                   [ 50%]
test_parameterized_fixture2.py::TestIt::test_tc1[False] FAILED

I don't know exactly what are the semantics of this form, but it seems that pytest.mark.parametrize recognizes that although the test_tc1 method does not take an argument named tester_arg, the tester fixture that it's using does, so it passes the parametrized argument on through the tester fixture.


I had a similar problem--I have a fixture called test_package, and I later wanted to be able to pass an optional argument to that fixture when running it in specific tests. For example:

@pytest.fixture()
def test_package(request, version='1.0'):
    ...
    request.addfinalizer(fin)
    ...
    return package

(It doesn't matter for these purposes what the fixture does or what type of object the returned package) is.

It would then be desirable to somehow use this fixture in a test function in such a way that I can also specify the version argument to that fixture to use with that test. This is currently not possible, though might make a nice feature.

In the meantime it was easy enough to make my fixture simply return a function that does all the work the fixture previously did, but allows me to specify the version argument:

@pytest.fixture()
def test_package(request):
    def make_test_package(version='1.0'):
        ...
        request.addfinalizer(fin)
        ...
        return test_package

    return make_test_package

Now I can use this in my test function like:

def test_install_package(test_package):
    package = test_package(version='1.1')
    ...
    assert ...

and so on.

The OP's attempted solution was headed in the right direction, and as @hpk42's answer suggests, the MyTester.__init__ could just store off a reference to the request like:

class MyTester(object):
    def __init__(self, request, arg=["var0", "var1"]):
        self.request = request
        self.arg = arg
        # self.use_arg_to_init_logging_part()

    def dothis(self):
        print "this"

    def dothat(self):
        print "that"

Then use this to implement the fixture like:

@pytest.fixture()
def tester(request):
    """ create tester object """
    # how to use the list below for arg?
    _tester = MyTester(request)
    return _tester

If desired the MyTester class could be restructured a bit so that its .args attribute can be updated after it has been created, to tweak the behavior for individual tests.


回答 1

实际上,py.test中通过间接参数化本身支持此功能。

就您而言,您将:

@pytest.fixture
def tester(request):
    """Create tester object"""
    return MyTester(request.param)


class TestIt:
    @pytest.mark.parametrize('tester', [['var1', 'var2']], indirect=True)
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

This is actually supported natively in py.test via indirect parametrization.

In your case, you would have:

@pytest.fixture
def tester(request):
    """Create tester object"""
    return MyTester(request.param)


class TestIt:
    @pytest.mark.parametrize('tester', [['var1', 'var2']], indirect=True)
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

回答 2

您可以从Fixture函数(从而从Tester类)访问请求的模块/类/函数,请参见与来自Fixture函数的请求测试上下文进行交互。因此,您可以在类或模块上声明一些参数,然后测试仪固定装置即可进行拾取。

You can access the requesting module/class/function from fixture functions (and thus from your Tester class), see interacting with requesting test context from a fixture function. So you could declare some parameters on a class or module and the tester fixture can pick it up.


回答 3

我找不到任何文档,但是,它似乎可以在最新版本的pytest中使用。

@pytest.fixture
def tester(tester_arg):
    """Create tester object"""
    return MyTester(tester_arg)


class TestIt:
    @pytest.mark.parametrize('tester_arg', [['var1', 'var2']])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

I couldn't find any document, however, it seems to work in latest version of pytest.

@pytest.fixture
def tester(tester_arg):
    """Create tester object"""
    return MyTester(tester_arg)


class TestIt:
    @pytest.mark.parametrize('tester_arg', [['var1', 'var2']])
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

回答 4

改善imiric的答案:解决此问题的另一种优雅方法是创建“参数夹具”。我个人更喜欢它的indirect功能pytest。此功能可从中获得pytest_cases,最初的想法由Sup3rGeo提出。

import pytest
from pytest_cases import param_fixture

# create a single parameter fixture
var = param_fixture("var", [['var1', 'var2']], ids=str)

@pytest.fixture
def tester(var):
    """Create tester object"""
    return MyTester(var)

class TestIt:
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

请注意,这pytest-cases@pytest_fixture_plus允许您在灯具上使用参数化标记,并@cases_data允许您从单独模块中的函数中获取参数。有关详细信息,请参见doc。我是作者;)

To improve a little bit imiric's answer: another elegant way to solve this problem is to create "parameter fixtures". I personally prefer it over the indirect feature of pytest. This feature is available from pytest_cases, and the original idea was suggested by Sup3rGeo.

import pytest
from pytest_cases import param_fixture

# create a single parameter fixture
var = param_fixture("var", [['var1', 'var2']], ids=str)

@pytest.fixture
def tester(var):
    """Create tester object"""
    return MyTester(var)

class TestIt:
    def test_tc1(self, tester):
       tester.dothis()
       assert 1

Note that pytest-cases also provides @fixture that allow you to use parametrization marks directly on your fixtures instead of having to use @pytest.fixture(params=...)

from pytest_cases import fixture, parametrize

@fixture
@parametrize("var", [['var1', 'var2']], ids=str)
def tester(var):
    """Create tester object"""
    return MyTester(var)

and @parametrize_with_cases that allows you to source your parameters from "case functions" that may be grouped in a class or even a separate module. See doc for details. I'm the author by the way 😉


回答 5

我做了一个有趣的装饰器,可以编写如下的灯具:

@fixture_taking_arguments
def dog(request, /, name, age=69):
    return f"{name} the dog aged {age}"

在这里,您的左侧/还有其他固定装置,在右边,您可以使用以下参数提供:

@dog.arguments("Buddy", age=7)
def test_with_dog(dog):
    assert dog == "Buddy the dog aged 7"

这与函数参数的工作方式相同。如果不提供age参数,则使用默认值69。如果您不提供name或省略dog.arguments装饰器,则会得到常规的TypeError: dog() missing 1 required positional argument: 'name'。如果您有另一个接受参数的固定装置name,那么它与此不会冲突。

还支持异步装置。

此外,这为您提供了一个不错的设置计划:

$ pytest test_dogs_and_owners.py --setup-plan

SETUP    F dog['Buddy', age=7]
...
SETUP    F dog['Champion']
SETUP    F owner (fixtures used: dog)['John Travolta']

一个完整的例子:

from plugin import fixture_taking_arguments

@fixture_taking_arguments
def dog(request, /, name, age=69):
    return f"{name} the dog aged {age}"


@fixture_taking_arguments
def owner(request, dog, /, name="John Doe"):
    yield f"{name}, owner of {dog}"


@dog.arguments("Buddy", age=7)
def test_with_dog(dog):
    assert dog == "Buddy the dog aged 7"


@dog.arguments("Champion")
class TestChampion:
    def test_with_dog(self, dog):
        assert dog == "Champion the dog aged 69"

    def test_with_default_owner(self, owner, dog):
        assert owner == "John Doe, owner of Champion the dog aged 69"
        assert dog == "Champion the dog aged 69"

    @owner.arguments("John Travolta")
    def test_with_named_owner(self, owner):
        assert owner == "John Travolta, owner of Champion the dog aged 69"

装饰器的代码:

import pytest
from dataclasses import dataclass
from functools import wraps
from inspect import signature, Parameter, isgeneratorfunction, iscoroutinefunction, isasyncgenfunction
from itertools import zip_longest, chain


_NOTHING = object()


def _omittable_parentheses_decorator(decorator):
    @wraps(decorator)
    def wrapper(*args, **kwargs):
        if not kwargs and len(args) == 1 and callable(args[0]):
            return decorator()(args[0])
        else:
            return decorator(*args, **kwargs)
    return wrapper


@dataclass
class _ArgsKwargs:
    args: ...
    kwargs: ...

    def __repr__(self):
        return ", ".join(chain(
               (repr(v) for v in self.args), 
               (f"{k}={v!r}" for k, v in self.kwargs.items())))


def _flatten_arguments(sig, args, kwargs):
    assert len(sig.parameters) == len(args) + len(kwargs)
    for name, arg in zip_longest(sig.parameters, args, fillvalue=_NOTHING):
        yield arg if arg is not _NOTHING else kwargs[name]


def _get_actual_args_kwargs(sig, args, kwargs):
    request = kwargs["request"]
    try:
        request_args, request_kwargs = request.param.args, request.param.kwargs
    except AttributeError:
        request_args, request_kwargs = (), {}
    return tuple(_flatten_arguments(sig, args, kwargs)) + request_args, request_kwargs


@_omittable_parentheses_decorator
def fixture_taking_arguments(*pytest_fixture_args, **pytest_fixture_kwargs):
    def decorator(func):
        original_signature = signature(func)

        def new_parameters():
            for param in original_signature.parameters.values():
                if param.kind == Parameter.POSITIONAL_ONLY:
                    yield param.replace(kind=Parameter.POSITIONAL_OR_KEYWORD)

        new_signature = original_signature.replace(parameters=list(new_parameters()))

        if "request" not in new_signature.parameters:
            raise AttributeError("Target function must have positional-only argument `request`")

        is_async_generator = isasyncgenfunction(func)
        is_async = is_async_generator or iscoroutinefunction(func)
        is_generator = isgeneratorfunction(func)

        if is_async:
            @wraps(func)
            async def wrapper(*args, **kwargs):
                args, kwargs = _get_actual_args_kwargs(new_signature, args, kwargs)
                if is_async_generator:
                    async for result in func(*args, **kwargs):
                        yield result
                else:
                    yield await func(*args, **kwargs)
        else:
            @wraps(func)
            def wrapper(*args, **kwargs):
                args, kwargs = _get_actual_args_kwargs(new_signature, args, kwargs)
                if is_generator:
                    yield from func(*args, **kwargs)
                else:
                    yield func(*args, **kwargs)

        wrapper.__signature__ = new_signature
        fixture = pytest.fixture(*pytest_fixture_args, **pytest_fixture_kwargs)(wrapper)
        fixture_name = pytest_fixture_kwargs.get("name", fixture.__name__)

        def parametrizer(*args, **kwargs):
            return pytest.mark.parametrize(fixture_name, [_ArgsKwargs(args, kwargs)], indirect=True)

        fixture.arguments = parametrizer

        return fixture
    return decorator

I made a funny decorator that allows writing fixtures like this:

@fixture_taking_arguments
def dog(request, /, name, age=69):
    return f"{name} the dog aged {age}"

Here, to the left of / you have other fixtures, and to the right you have parameters that are supplied using:

@dog.arguments("Buddy", age=7)
def test_with_dog(dog):
    assert dog == "Buddy the dog aged 7"

This works the same way function arguments work. If you don't supply the age argument, the default one, 69, is used instead. if you don't supply name, or omit the dog.arguments decorator, you get the regular TypeError: dog() missing 1 required positional argument: 'name'. If you have another fixture that takes argument name, it doesn't conflict with this one.

Async fixtures are also supported.

Additionally, this gives you a nice setup plan:

$ pytest test_dogs_and_owners.py --setup-plan

SETUP    F dog['Buddy', age=7]
...
SETUP    F dog['Champion']
SETUP    F owner (fixtures used: dog)['John Travolta']

A full example:

from plugin import fixture_taking_arguments

@fixture_taking_arguments
def dog(request, /, name, age=69):
    return f"{name} the dog aged {age}"


@fixture_taking_arguments
def owner(request, dog, /, name="John Doe"):
    yield f"{name}, owner of {dog}"


@dog.arguments("Buddy", age=7)
def test_with_dog(dog):
    assert dog == "Buddy the dog aged 7"


@dog.arguments("Champion")
class TestChampion:
    def test_with_dog(self, dog):
        assert dog == "Champion the dog aged 69"

    def test_with_default_owner(self, owner, dog):
        assert owner == "John Doe, owner of Champion the dog aged 69"
        assert dog == "Champion the dog aged 69"

    @owner.arguments("John Travolta")
    def test_with_named_owner(self, owner):
        assert owner == "John Travolta, owner of Champion the dog aged 69"

The code for the decorator:

import pytest
from dataclasses import dataclass
from functools import wraps
from inspect import signature, Parameter, isgeneratorfunction, iscoroutinefunction, isasyncgenfunction
from itertools import zip_longest, chain


_NOTHING = object()


def _omittable_parentheses_decorator(decorator):
    @wraps(decorator)
    def wrapper(*args, **kwargs):
        if not kwargs and len(args) == 1 and callable(args[0]):
            return decorator()(args[0])
        else:
            return decorator(*args, **kwargs)
    return wrapper


@dataclass
class _ArgsKwargs:
    args: ...
    kwargs: ...

    def __repr__(self):
        return ", ".join(chain(
               (repr(v) for v in self.args), 
               (f"{k}={v!r}" for k, v in self.kwargs.items())))


def _flatten_arguments(sig, args, kwargs):
    assert len(sig.parameters) == len(args) + len(kwargs)
    for name, arg in zip_longest(sig.parameters, args, fillvalue=_NOTHING):
        yield arg if arg is not _NOTHING else kwargs[name]


def _get_actual_args_kwargs(sig, args, kwargs):
    request = kwargs["request"]
    try:
        request_args, request_kwargs = request.param.args, request.param.kwargs
    except AttributeError:
        request_args, request_kwargs = (), {}
    return tuple(_flatten_arguments(sig, args, kwargs)) + request_args, request_kwargs


@_omittable_parentheses_decorator
def fixture_taking_arguments(*pytest_fixture_args, **pytest_fixture_kwargs):
    def decorator(func):
        original_signature = signature(func)

        def new_parameters():
            for param in original_signature.parameters.values():
                if param.kind == Parameter.POSITIONAL_ONLY:
                    yield param.replace(kind=Parameter.POSITIONAL_OR_KEYWORD)

        new_signature = original_signature.replace(parameters=list(new_parameters()))

        if "request" not in new_signature.parameters:
            raise AttributeError("Target function must have positional-only argument `request`")

        is_async_generator = isasyncgenfunction(func)
        is_async = is_async_generator or iscoroutinefunction(func)
        is_generator = isgeneratorfunction(func)

        if is_async:
            @wraps(func)
            async def wrapper(*args, **kwargs):
                args, kwargs = _get_actual_args_kwargs(new_signature, args, kwargs)
                if is_async_generator:
                    async for result in func(*args, **kwargs):
                        yield result
                else:
                    yield await func(*args, **kwargs)
        else:
            @wraps(func)
            def wrapper(*args, **kwargs):
                args, kwargs = _get_actual_args_kwargs(new_signature, args, kwargs)
                if is_generator:
                    yield from func(*args, **kwargs)
                else:
                    yield func(*args, **kwargs)

        wrapper.__signature__ = new_signature
        fixture = pytest.fixture(*pytest_fixture_args, **pytest_fixture_kwargs)(wrapper)
        fixture_name = pytest_fixture_kwargs.get("name", fixture.__name__)

        def parametrizer(*args, **kwargs):
            return pytest.mark.parametrize(fixture_name, [_ArgsKwargs(args, kwargs)], indirect=True)

        fixture.arguments = parametrizer

        return fixture
    return decorator

本文由 Python 实用宝典 作者:Python实用宝典 发表,其版权均为 Python 实用宝典 所有,文章内容系作者个人观点,不代表 Python 实用宝典 对观点赞同或支持。如需转载,请注明文章来源。
11

抱歉,评论已关闭!