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import unittest
import reactivex
from reactivex import operators as ops
from reactivex.testing import ReactiveTest, TestScheduler
on_next = ReactiveTest.on_next
on_completed = ReactiveTest.on_completed
on_error = ReactiveTest.on_error
subscribe = ReactiveTest.subscribe
subscribed = ReactiveTest.subscribed
disposed = ReactiveTest.disposed
created = ReactiveTest.created
class TestReduce(unittest.TestCase):
def test_reduce_with_seed_empty(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_completed(250)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(lambda acc, x: acc + x, 42))
res = scheduler.start(create=create).messages
assert res == [on_next(250, 42), on_completed(250)]
def test_reduce_with_seed_return(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_next(210, 24), on_completed(250)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x, seed=42))
res = scheduler.start(create=create).messages
assert res == [on_next(250, 42 + 24), on_completed(250)]
def test_reduce_with_seed_on_error(self):
ex = "ex"
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_error(210, ex)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x, seed=42))
res = scheduler.start(create=create).messages
assert res == [on_error(210, ex)]
def test_reduce_with_seed_never(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x, seed=42))
res = scheduler.start(create=create).messages
assert res == []
def test_reduce_with_seed_range(self):
scheduler = TestScheduler()
msgs = [
on_next(150, 1),
on_next(210, 0),
on_next(220, 1),
on_next(230, 2),
on_next(240, 3),
on_next(250, 4),
on_completed(260),
]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x, seed=42))
res = scheduler.start(create=create).messages
assert res == [on_next(260, 10 + 42), on_completed(260)]
def test_reduce_without_seed_empty(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_completed(250)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x))
res = scheduler.start(create=create).messages
assert len(res) == 1
assert res[0].value.kind == "E" and res[0].value.exception is not None
assert res[0].time == 250
def test_reduce_without_seed_return(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_next(210, 24), on_completed(250)]
def create():
return xs.pipe(ops.reduce(accumulator=lambda acc, x: acc + x))
xs = scheduler.create_hot_observable(msgs)
res = scheduler.start(create=create).messages
assert res == [on_next(250, 24), on_completed(250)]
def test_reduce_without_seed_on_error(self):
ex = "ex"
scheduler = TestScheduler()
msgs = [on_next(150, 1), on_error(210, ex)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(lambda acc, x: acc + x))
res = scheduler.start(create=create).messages
assert res == [on_error(210, ex)]
def test_reduce_without_seed_never(self):
scheduler = TestScheduler()
msgs = [on_next(150, 1)]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(lambda acc, x: acc + x))
res = scheduler.start(create=create).messages
assert res == []
def test_reduce_without_seed_range(self):
scheduler = TestScheduler()
msgs = [
on_next(150, 1),
on_next(210, 0),
on_next(220, 1),
on_next(230, 2),
on_next(240, 3),
on_next(250, 4),
on_completed(260),
]
xs = scheduler.create_hot_observable(msgs)
def create():
return xs.pipe(ops.reduce(lambda acc, x: acc + x))
res = scheduler.start(create=create).messages
assert res == [on_next(260, 10), on_completed(260)]
def test_reduce_seed_none_does_not_crash(self):
reactivex.empty().pipe(ops.reduce(lambda acc, v: v, seed=None)).subscribe()
if __name__ == "__main__":
unittest.main()
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