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from collections.abc import Callable
from typing import Any
import pytest
from fastmcp.utilities.decorators import DecoratedFunction
DECORATOR_CALLED = []
def decorator(fn: Callable[..., Any]) -> DecoratedFunction[..., Any]:
@functools.wraps(fn)
def wrapper(*args: Any, **kwargs: Any) -> Any:
DECORATOR_CALLED.append((args, kwargs))
return fn(*args, **kwargs)
return DecoratedFunction(wrapper)
@pytest.fixture(autouse=True)
def reset_decorator_called():
DECORATOR_CALLED.clear()
yield
DECORATOR_CALLED.clear()
@decorator
def add(a: int, b: int) -> int:
return a + b
@decorator
async def add_async(a: int, b: int) -> int:
return a + b
class DecoratedClass:
def __init__(self, x: int):
self.x = x
@decorator
def add(self, a: int, b: int) -> int:
return a + b + self.x
@decorator
async def add_async(self, a: int, b: int) -> int:
return a + b + self.x
@classmethod
@decorator
def add_classmethod(cls, a: int, b: int) -> int:
return a + b
@staticmethod
@decorator
def add_staticmethod(a: int, b: int) -> int:
return a + b
@classmethod
@decorator
async def add_classmethod_async(cls, a: int, b: int) -> int:
return a + b
@staticmethod
@decorator
async def add_staticmethod_async(a: int, b: int) -> int:
return a + b
@decorator
@classmethod
def add_classmethod_reverse_decorator_order(cls, a: int, b: int) -> int:
return a + b
@decorator
@staticmethod
def add_staticmethod_reverse_decorator_order(a: int, b: int) -> int:
return a + b
@decorator
@classmethod
async def add_classmethod_async_reverse_decorator_order(cls, a: int, b: int) -> int:
return a + b
@decorator
@staticmethod
async def add_staticmethod_async_reverse_decorator_order(a: int, b: int) -> int:
return a + b
def test_add():
assert add(1, 2) == 3
assert DECORATOR_CALLED == [((1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert add(a=3, b=4) == 7
assert DECORATOR_CALLED == [((), {"a": 3, "b": 4})]
async def test_add_async():
assert await add_async(1, 2) == 3
assert DECORATOR_CALLED == [((1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert await add_async(a=3, b=4) == 7
assert DECORATOR_CALLED == [((), {"a": 3, "b": 4})]
def test_instance_method():
obj = DecoratedClass(10)
assert obj.add(2, 3) == 15
assert DECORATOR_CALLED == [((obj, 2, 3), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert obj.add(a=4, b=5) == 19
assert DECORATOR_CALLED == [((obj,), {"a": 4, "b": 5})]
async def test_instance_method_async():
obj = DecoratedClass(10)
assert await obj.add_async(2, 3) == 15
assert DECORATOR_CALLED == [((obj, 2, 3), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert await obj.add_async(a=4, b=5) == 19
assert DECORATOR_CALLED == [((obj,), {"a": 4, "b": 5})]
def test_classmethod():
assert DecoratedClass.add_classmethod(1, 2) == 3
assert DECORATOR_CALLED == [((DecoratedClass, 1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert DecoratedClass.add_classmethod(a=3, b=4) == 7
assert DECORATOR_CALLED == [((DecoratedClass,), {"a": 3, "b": 4})]
DECORATOR_CALLED.clear()
# Test via instance
obj = DecoratedClass(10)
assert obj.add_classmethod(5, 6) == 11
assert DECORATOR_CALLED == [((DecoratedClass, 5, 6), {})]
async def test_classmethod_async():
assert await DecoratedClass.add_classmethod_async(1, 2) == 3
assert DECORATOR_CALLED == [((DecoratedClass, 1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert await DecoratedClass.add_classmethod_async(a=3, b=4) == 7
assert DECORATOR_CALLED == [((DecoratedClass,), {"a": 3, "b": 4})]
DECORATOR_CALLED.clear()
# Test via instance
obj = DecoratedClass(10)
assert await obj.add_classmethod_async(5, 6) == 11
assert DECORATOR_CALLED == [((DecoratedClass, 5, 6), {})]
def test_classmethod_wrong_order():
with pytest.raises(
TypeError,
match="To apply this decorator to a classmethod, apply the decorator first, then @classmethod on top.",
):
DecoratedClass.add_classmethod_reverse_decorator_order(1, 2)
async def test_classmethod_async_wrong_order():
with pytest.raises(
TypeError,
match="To apply this decorator to a classmethod, apply the decorator first, then @classmethod on top.",
):
await DecoratedClass.add_classmethod_async_reverse_decorator_order(1, 2)
def test_staticmethod():
assert DecoratedClass.add_staticmethod(1, 2) == 3
assert DECORATOR_CALLED == [((1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert DecoratedClass.add_staticmethod(a=3, b=4) == 7
assert DECORATOR_CALLED == [((), {"a": 3, "b": 4})]
DECORATOR_CALLED.clear()
# Test via instance
obj = DecoratedClass(10)
assert obj.add_staticmethod(5, 6) == 11
assert DECORATOR_CALLED == [((5, 6), {})]
async def test_staticmethod_async():
assert await DecoratedClass.add_staticmethod_async(1, 2) == 3
assert DECORATOR_CALLED == [((1, 2), {})]
DECORATOR_CALLED.clear()
# Test with keyword arguments
assert await DecoratedClass.add_staticmethod_async(a=3, b=4) == 7
assert DECORATOR_CALLED == [((), {"a": 3, "b": 4})]
DECORATOR_CALLED.clear()
# Test via instance
obj = DecoratedClass(10)
assert await obj.add_staticmethod_async(5, 6) == 11
assert DECORATOR_CALLED == [((5, 6), {})]
def test_staticmethod_wrong_order():
assert DecoratedClass.add_staticmethod_reverse_decorator_order(1, 2) == 3
assert DECORATOR_CALLED == [((1, 2), {})]
async def test_staticmethod_async_wrong_order():
assert (
await DecoratedClass.add_staticmethod_async_reverse_decorator_order(1, 2) == 3
)
assert DECORATOR_CALLED == [((1, 2), {})]
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