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import re
import sys
from unittest import mock
import pytest
from aiosignal import Signal
if sys.version_info >= (3, 11):
from typing import Unpack
else:
from typing_extensions import Unpack
class Owner:
def __repr__(self) -> str:
return "<Owner 0xdeadbeef>"
@pytest.fixture
def owner() -> Owner:
return Owner()
async def test_signal_positional_args(owner: Owner) -> None:
async def callback(a: int, b: str) -> None:
return
signal = Signal[int, str](owner)
signal.append(callback)
signal.freeze()
await signal.send(42, "foo")
async def test_add_signal_handler_not_a_callable(owner: Owner) -> None:
callback = True
signal = Signal(owner)
signal.append(callback) # type: ignore[arg-type]
signal.freeze()
with pytest.raises(TypeError):
await signal.send()
async def test_function_signal_dispatch_kwargs(owner: Owner) -> None:
signal = Signal(owner)
kwargs = {"foo": 1, "bar": 2}
callback_mock = mock.Mock()
async def callback(**kwargs: object) -> None:
callback_mock(**kwargs)
signal.append(callback)
signal.freeze()
await signal.send(**kwargs)
callback_mock.assert_called_once_with(**kwargs)
async def test_function_signal_dispatch_args_kwargs(owner: Owner) -> None:
signal = Signal[Unpack[tuple[str, ...]]](owner)
kwargs = {"foo": 1, "bar": 2}
callback_mock = mock.Mock()
async def callback(*args: str, **kwargs: object) -> None:
callback_mock(*args, **kwargs)
signal.append(callback)
signal.freeze()
await signal.send("a", "b", **kwargs)
callback_mock.assert_called_once_with("a", "b", **kwargs)
async def test_non_coroutine(owner: Owner) -> None:
signal = Signal(owner)
kwargs = {"foo": 1, "bar": 2}
callback = mock.Mock()
signal.append(callback)
signal.freeze()
with pytest.raises(TypeError):
await signal.send(**kwargs)
def test_setitem(owner: Owner) -> None:
signal = Signal(owner)
m1 = mock.Mock()
signal.append(m1)
assert signal[0] is m1
m2 = mock.Mock()
signal[0] = m2
assert signal[0] is m2
def test_delitem(owner: Owner) -> None:
signal = Signal(owner)
m1 = mock.Mock()
signal.append(m1)
assert len(signal) == 1
del signal[0]
assert len(signal) == 0
def test_cannot_append_to_frozen_signal(owner: Owner) -> None:
signal = Signal(owner)
m1 = mock.Mock()
m2 = mock.Mock()
signal.append(m1)
signal.freeze()
with pytest.raises(RuntimeError):
signal.append(m2)
assert list(signal) == [m1]
def test_cannot_setitem_in_frozen_signal(owner: Owner) -> None:
signal = Signal(owner)
m1 = mock.Mock()
m2 = mock.Mock()
signal.append(m1)
signal.freeze()
with pytest.raises(RuntimeError):
signal[0] = m2
assert list(signal) == [m1]
def test_cannot_delitem_in_frozen_signal(owner: Owner) -> None:
signal = Signal(owner)
m1 = mock.Mock()
signal.append(m1)
signal.freeze()
with pytest.raises(RuntimeError):
del signal[0]
assert list(signal) == [m1]
async def test_cannot_send_non_frozen_signal(owner: Owner) -> None:
signal = Signal(owner)
callback_mock = mock.Mock()
async def callback(**kwargs: object) -> None:
callback_mock(**kwargs) # pragma: no cover # mustn't be called
signal.append(callback)
with pytest.raises(RuntimeError):
await signal.send()
assert not callback_mock.called
def test_repr(owner: Owner) -> None:
signal = Signal(owner)
signal.append(mock.Mock(__repr__=lambda *a: "<callback>"))
assert (
re.match(
r"<Signal owner=<Owner 0xdeadbeef>, frozen=False, " r"\[<callback>\]>",
repr(signal),
)
is not None
)
async def test_decorator_callback_dispatch_args_kwargs(owner: Owner) -> None:
signal = Signal(owner)
args = {"a", "b"}
kwargs = {"foo": 1, "bar": 2}
callback_mock = mock.Mock()
@signal
async def callback(*args: object, **kwargs: object) -> None:
callback_mock(*args, **kwargs)
signal.freeze()
await signal.send(*args, **kwargs)
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