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import asyncio
import pytest
from aiostream import stream, pipe
from aiostream.test_utils import add_resource
@pytest.mark.asyncio
async def test_take(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.count() | add_resource.pipe(1) | pipe.take(3)
await assert_run(xs, [0, 1, 2])
with assert_cleanup():
xs = stream.count() | add_resource.pipe(1) | pipe.take(0)
await assert_run(xs, [])
@pytest.mark.asyncio
async def test_takelast(assert_run):
xs = stream.range(10) | add_resource.pipe(1) | pipe.takelast(3)
await assert_run(xs, [7, 8, 9])
@pytest.mark.asyncio
async def test_skip(assert_run, assert_cleanup):
xs = stream.range(10) | add_resource.pipe(1) | pipe.skip(8)
await assert_run(xs, [8, 9])
@pytest.mark.asyncio
async def test_skiplast(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.range(10) | add_resource.pipe(1) | pipe.skiplast(8)
await assert_run(xs, [0, 1])
with assert_cleanup():
xs = stream.range(10) | add_resource.pipe(1) | pipe.skiplast(0)
await assert_run(xs, list(range(10)))
@pytest.mark.asyncio
async def test_filterindex(assert_run, assert_cleanup):
filterindex = stream.select.filterindex
xs = (
stream.range(10)
| add_resource.pipe(1)
| filterindex.pipe(lambda x: x in [4, 7, 8])
)
await assert_run(xs, [4, 7, 8])
@pytest.mark.asyncio
async def test_slice(assert_run, assert_cleanup):
slice = stream.select.slice
with assert_cleanup():
xs = stream.range(10, 20) | add_resource.pipe(1) | slice.pipe(2)
await assert_run(xs, [10, 11])
with assert_cleanup():
xs = stream.range(10, 20) | add_resource.pipe(1) | slice.pipe(8, None)
await assert_run(xs, [18, 19])
with assert_cleanup():
xs = stream.range(10, 20) | add_resource.pipe(1) | slice.pipe(-3, -1)
await assert_run(xs, [17, 18])
with assert_cleanup():
xs = stream.range(10, 20) | add_resource.pipe(1) | slice.pipe(-5, -1, 2)
await assert_run(xs, [15, 17])
with pytest.raises(ValueError):
xs = stream.range(10, 20) | slice.pipe(5, 1, -1)
with pytest.raises(ValueError):
xs = stream.range(10, 20) | slice.pipe(-8, 8)
@pytest.mark.asyncio
async def test_item(assert_run, assert_cleanup):
item = stream.select.item
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1) | item.pipe(2)
await assert_run(xs, [2])
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1) | item.pipe(-2)
await assert_run(xs, [3])
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1) | item.pipe(10)
exception = IndexError(
"Index out of range",
)
await assert_run(xs, [], exception)
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1) | item.pipe(-10)
exception = IndexError(
"Index out of range",
)
await assert_run(xs, [], exception)
@pytest.mark.asyncio
async def test_getitem(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1) | pipe.getitem(2)
await assert_run(xs, [2])
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1)
await assert_run(xs[2], [2])
with assert_cleanup():
s = slice(1, 3)
xs = stream.range(5) | add_resource.pipe(1) | pipe.getitem(s)
await assert_run(xs, [1, 2])
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1)
await assert_run(xs[1:3], [1, 2])
with assert_cleanup():
s = slice(1, 5, 2)
xs = stream.range(5) | add_resource.pipe(1) | pipe.getitem(s)
await assert_run(xs, [1, 3])
with assert_cleanup():
xs = stream.range(5) | add_resource.pipe(1)
await assert_run(xs[1:5:2], [1, 3])
with pytest.raises(TypeError):
xs = stream.range(5)[None] # type: ignore
@pytest.mark.asyncio
async def test_filter(assert_run, assert_cleanup):
with assert_cleanup():
xs = (
stream.range(1, 10)
| add_resource.pipe(1)
| pipe.filter(lambda x: x in [4, 7, 8])
)
await assert_run(xs, [4, 7, 8])
async def afunc(x):
await asyncio.sleep(1)
return x in [3, 6, 9]
with assert_cleanup() as loop:
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.filter(afunc)
await assert_run(xs, [3, 6, 9])
assert loop.steps == [1] * 10
@pytest.mark.asyncio
async def test_until(assert_run, assert_cleanup):
with assert_cleanup():
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.until(lambda x: x == 3)
await assert_run(xs, [1, 2, 3])
async def afunc(x):
await asyncio.sleep(1)
return x == 3
with assert_cleanup() as loop:
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.until(afunc)
await assert_run(xs, [1, 2, 3])
assert loop.steps == [1] * 4
@pytest.mark.asyncio
async def test_takewhile(assert_run, assert_cleanup):
def less_than_4(x: int) -> bool:
return x < 4
with assert_cleanup():
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.takewhile(less_than_4)
await assert_run(xs, [1, 2, 3])
async def afunc(x):
await asyncio.sleep(1)
return x < 4
with assert_cleanup() as loop:
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.takewhile(afunc)
await assert_run(xs, [1, 2, 3])
assert loop.steps == [1] * 5
@pytest.mark.asyncio
async def test_dropwhile(assert_run, assert_cleanup):
def less_than_7(x: int) -> bool:
return x < 7
with assert_cleanup():
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.dropwhile(less_than_7)
await assert_run(xs, [7, 8, 9])
async def afunc(x):
await asyncio.sleep(1)
return x < 7
with assert_cleanup() as loop:
xs = stream.range(1, 10) | add_resource.pipe(1) | pipe.dropwhile(afunc)
await assert_run(xs, [7, 8, 9])
assert loop.steps == [1] * 8
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