pytest and functools decorator
If using a decorator created using functools.wraps with pytest, it will give an error similar to the following if you attempt to use fixtures:
TypeError: test_func() takes exactly 1 argument (0 given).
The solution is to use the decorator package instead of functools to create the decorator.
A comment on the above stackoverflow answer (which is over 4 years old) states that pytest depends upon the decorator package. However as far as I can tell from looking at the current setup.py for pytest, it does not depend upon decorator. However using decorator still fixed the issue.
# Uses functools - *not* compatible with pytest :(
import functools
def my_decorator(some_arg):
def deco(func):
@functools.wraps(*args, **kwargs)
def wrapper(*args, **kwargs)
# do something with some_arg?
ret = func(*args, **kwargs)
# do something else?
return ret
return wrapper
return deco
# Uses decorator - compatible with pytest :)
import decorator
def my_decorator(some_arg):
def deco(func):
def wrapper(func, *args, **kwargs):
# do stuff with some_arg?
ret = func(*args, **kwargs)
# do something else?
return ret
return decorator.decorator(wrapper, func)
return deco
from my_module.decorators import my_decorator
@my_decorator(1234)
def test_something(my_fixture):
# do test