def test_seq_pipeline(xs: List[int]):
ys = seq.of(xs).pipe(
seq.map(lambda x: x * 10),
seq.filter(lambda x: x > 100),
seq.fold(lambda s, x: s + x, 0),
)
assert ys == functools.reduce(lambda s, x: s + x, filter(lambda x: x > 100, map(lambda x: x * 10, xs)), 0)
def test_seq_pipeline(xs: List[int]):
mapper: Callable[[int], int] = lambda x: x * 10
predicate: Callable[[int], bool] = lambda x: x > 100
folder: Callable[[int, int], int] = lambda s, x: s + x
ys = seq.of_iterable(xs).pipe(
seq.map(mapper),
seq.filter(predicate),
seq.fold(folder, 0),
)
assert ys == functools.reduce(
lambda s, x: s + x, filter(lambda x: x > 100,
map(lambda x: x * 10, xs)), 0)
def test_seq_fold_pipe(xs: List[int], s: int):
folder: Callable[[int, int], int] = lambda s, v: s + v
value = pipe(seq.of(xs), seq.fold(folder, s))
assert value == sum(xs) + s