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import pytest
import asyncio
from aiostream import stream, pipe
from aiostream.test_utils import add_resource
@pytest.mark.asyncio
async def test_starmap(assert_run, assert_cleanup):
def target(a: int, b: int, *_) -> int:
return a + b
with assert_cleanup():
xs = stream.range(5)
ys = stream.range(5)
zs = xs | pipe.zip(ys) | pipe.starmap(target)
expected = [x * 2 for x in range(5)]
await assert_run(zs, expected)
async def async_target(arg: float, result: int, *_) -> int:
return await asyncio.sleep(arg, result)
with assert_cleanup() as loop:
xs = stream.range(1, 4)
ys = stream.range(1, 4)
zs = xs | pipe.zip(ys) | pipe.starmap(async_target)
await assert_run(zs, [1, 2, 3])
assert loop.steps == [1, 1, 1]
with assert_cleanup() as loop:
xs = stream.range(1, 4)
ys = stream.range(1, 4)
zs = xs | pipe.zip(ys) | pipe.starmap(async_target, task_limit=1)
await assert_run(zs, [1, 2, 3])
assert loop.steps == [1, 2, 3]
@pytest.mark.asyncio
async def test_cycle(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.empty() | pipe.cycle() | pipe.timeout(1)
await assert_run(xs, [], asyncio.TimeoutError())
with assert_cleanup():
xs = stream.empty() | add_resource.pipe(1) | pipe.cycle() | pipe.timeout(1)
await assert_run(xs, [], asyncio.TimeoutError())
with assert_cleanup() as loop:
xs = stream.just(1) | add_resource.pipe(1) | pipe.cycle()
await assert_run(xs[:5], [1] * 5)
assert loop.steps == [1] * 5
@pytest.mark.asyncio
async def test_chunks(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.range(3, interval=1) | pipe.chunks(3)
await assert_run(xs, [[0, 1, 2]])
with assert_cleanup():
xs = stream.range(4, interval=1) | pipe.chunks(3)
await assert_run(xs, [[0, 1, 2], [3]])
with assert_cleanup():
xs = stream.range(5, interval=1) | pipe.chunks(3)
await assert_run(xs, [[0, 1, 2], [3, 4]])
with assert_cleanup():
xs = stream.count(interval=1) | add_resource.pipe(1) | pipe.chunks(3)
await assert_run(xs[:1], [[0, 1, 2]])
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