将pytest夹具传递给非pytest代码

Question

当f.result通常被调用时，它返回1。但是，在测试f时，我希望将my_var的返回值传递给f，以便test_stuff中的assert返回True。

是否有一个可简化此功能的pytest功能？

# conftest.py
import pytest
@pytest.fixture()
def my_var():
  b = 2
  return b

# test_stuff.py
import pytest
from mycode import f

def test_stuff():
  assert f.result == 2


"""
./tests/test_stuff.py::test_stuff Failed: [undefined]assert 1 == 2
 +  where 1 = f.result
def test_stuff():
>     assert f.result == 2
E     assert 1 == 2
E      +  where 1 = f.result

tests/test_stuff.py:5: AssertionError
"""

# mycode.py
class f:
  
  ## Pytest fixture to cast b as my_var here?
  def thing(a: int, b: int = None) -> int:
    ## Or maybe a way to cast b as my_var here?
    if not b:
      return a
    else:
      return b

  result = thing(1)

if __name__ == "__main__":
  print(f.result)

Answer 1

我认为，当您通过夹具测试函数并使用参数调用f时，它会工作的，如下所示：

def test_stuff(my_var):
  f1 = f(my_var)
  assert f1.result == my_var