async def test_pipe_complex_pipe():
xs = AsyncObservable.from_iterable([1, 2, 3])
result = []
def mapper(value):
return value * 10
async def predicate(value):
await asyncio.sleep(0.1)
return value > 1
async def long_running(value):
return AsyncObservable.from_iterable([value])
ys = pipe(xs,
op.filter(predicate),
op.map(mapper),
op.flat_map(long_running)
)
async with subscribe(ys) as stream:
async for value in stream:
result.append(value)
assert result == [20, 30]
async def test_pipe_map():
xs = AsyncObservable.from_iterable([1, 2, 3])
result = []
def mapper(value):
return value * 10
ys = pipe(xs, op.map(mapper))
async def asend(value):
result.append(value)
await run(ys, AnonymousAsyncObserver(asend))
assert result == [10, 20, 30]
async def test_pipe_simple_pipe():
xs = AsyncObservable.from_iterable([1, 2, 3])
result = []
def mapper(value):
return value * 10
async def predicate(value):
await asyncio.sleep(0.1)
return value > 1
ys = pipe(xs, _.filter(predicate), _.map(mapper))
async def asend(value):
result.append(value)
await run(ys, AsyncAnonymousObserver(asend))
assert result == [20, 30]