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import asyncio
import traceback
import pytest
import outcome
from outcome import AlreadyUsedError, Error, Value
pytestmark = pytest.mark.asyncio
async def test_acapture():
async def add(x, y):
await asyncio.sleep(0)
return x + y
v = await outcome.acapture(add, 3, y=4)
assert v == Value(7)
async def raise_ValueError(x):
await asyncio.sleep(0)
raise ValueError(x)
e = await outcome.acapture(raise_ValueError, 9)
assert type(e.error) is ValueError
assert e.error.args == (9,)
async def test_asend():
async def my_agen_func():
assert (yield 1) == "value"
with pytest.raises(KeyError):
yield 2
yield 3
my_agen = my_agen_func().__aiter__()
v = Value("value")
e = Error(KeyError())
assert (await my_agen.asend(None)) == 1
assert (await v.asend(my_agen)) == 2
with pytest.raises(AlreadyUsedError):
await v.asend(my_agen)
assert (await e.asend(my_agen)) == 3
with pytest.raises(AlreadyUsedError):
await e.asend(my_agen)
with pytest.raises(StopAsyncIteration):
await my_agen.asend(None)
async def test_traceback_frame_removal():
async def raise_ValueError(x):
raise ValueError(x)
e = await outcome.acapture(raise_ValueError, 'abc')
with pytest.raises(ValueError) as exc_info:
e.unwrap()
frames = traceback.extract_tb(exc_info.value.__traceback__)
functions = [function for _, _, function, _ in frames]
assert functions[-2:] == ['unwrap', 'raise_ValueError']
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