问题

所以假设允许：

```python
＃ services/foo.py

from apps.bar import BarClass

static_foos = BarClass().get_statics()

class FooService():
     ....

和测试代码如下：

＃ tests/test_foo.py

from services.foo import FooService

def test_foo_something():
    assert FooService.something() == True

在这里，当pytest收集测试时，它似乎在我的任何尝试在conftest.py中模拟或阻止访问之前执行了BarClass.get_statics()。

更具体地说，假设get_statics() 在其中有一些requests.get，pytest中阻止网络的典型方法，即模拟socket.socket，并不起作用。

据我所知，在测试被收集之前执行某些操作的唯一方法是在conftest.py中使用pytest_configure，但是据我所知，它不允许我进行模拟，这让我现在完全失去了希望（而且由于各种原因，我实际上也无法真正更改test_something的内容）。

在这种情况下有可能的解决方案吗？

<details>
<summary>英文:</summary>

So assume the allowing :

services/foo.py

from apps.bar import BarClass

static_foos = BarClass().get_statics()

class FooService() :
....

and test code looking like :

tests/test_foo.py

from services.foo import FooService

def test_foo_something() :
assert FooService.something() == True

So here, when the pytest collects the test, it seems like it executes `BarClass.get_statics()` even before any of my attempts to mock or block access in `conftest.py` to kick in.

To be more specific, assuming `get_statics()` has some `requests.get` in it, a typical way of blocking network in pytest, which is mocking `socket.socket`, is not working.


From my knowledge, the only way to do something before tests get collected is to use `pytest_configure` in `conftest.py`, but also AFAIK it doesn't allow me to mock meaning that I'm just completely losing hope right now (Also it's not like I can really change the content of `test_something` for various reasons).

Is there any possible solution in this case?
 

</details>


# 答案1
**得分**: 2

```python
您可以在测试函数内部导入`services.foo`模块，*在*您对`requests.get`进行monkey-patch之后：

    import requests

    # 在这里定义您的MockResponse类

    def test_foo_something(monkeypatch):
        def mock_get(*args, **kwargs):
            return MockResponse()

        monkeypatch.setattr(requests, "get", mock_get)
        from services.foo import FooService

        assert FooService.something() == True

import requests

# define your MockResponse class here

def test_foo_something(monkeypatch):
    def mock_get(*args, **kwargs):
        return MockResponse()

    monkeypatch.setattr(requests, "get", mock_get)
    from services.foo import FooService

    assert FooService.something() == True

答案2

得分: 2

您可以在导入`FooService`之前，从`apps.bar`中导入`BarClass`并模拟`get_statics`。例如：

from apps.bar import BarClass

def do_nothing(*args, **kwargs):
pass

BarClass.get_statics = do_nothing

from services.foo import FooService

def test_foo_something():
assert FooService.something() == True

但是我认为最好在`services.foo`中添加一些初始化函数，并在需要时调用它。类似于：

from apps.bar import BarClass

static_foos = None

def init():
static_foos = BarClass().get_statics()

class FooService():
...

<details>
<summary>英文:</summary>

You can import `BarClass` from `apps.bar` right before importing `FooService` and mock the `get_statics`. For example:

from apps.bar import BarClass

def do_nothing(*args, **kwargs):
pass

BarClass.get_statics = do_nothing

from services.foo import FooService

def test_foo_something() :
assert FooService.something() == True

However I think it would be better to add some initializing function to `services.foo` and call it when its needed. Something like:

from apps.bar import BarClass

static_foos = None

def init():
static_foos = BarClass().get_statics()

class FooService():
...

</details>