def from_io(
cls,
inner_value: IO[_NewValueType],
) -> 'RequiresContextFutureResult[_NewValueType, Any, NoDeps]':
"""
Creates new container from successful ``IO`` value.
.. code:: python
>>> import anyio
>>> from returns.io import IO, IOSuccess
>>> from returns.context import RequiresContextFutureResult
>>> assert anyio.run(
... RequiresContextFutureResult.from_io(IO(1)),
... RequiresContextFutureResult.empty,
... ) == IOSuccess(1)
"""
return RequiresContextFutureResult(
lambda deps: FutureResult.from_io(inner_value), )
async def test_inner_value(subtests):
"""Ensure that coroutine correct value is preserved for all units."""
containers = [
# We have to define these values inside the test, because
# otherwise `anyio` will `await` reused coroutines.
# And they have to be fresh. That's why we use subtests for it.
FutureResult.from_value(1),
FutureResult.from_failure(1),
FutureResult.from_io(IO(1)),
FutureResult.from_failed_io(IO(1)),
FutureResult.from_ioresult(IOSuccess(1)),
FutureResult.from_ioresult(IOFailure(1)),
FutureResult.from_result(Success(1)),
FutureResult.from_result(Failure(1)),
FutureResult.from_future(Future.from_value(1)),
FutureResult.from_failed_future(Future.from_value(1)),
FutureResult.from_typecast(Future.from_value(Success(1))),
]
for container in containers:
with subtests.test(container=container):
result_inst = await container
assert result_inst._inner_value._inner_value == 1 # noqa: WPS437
