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import unittest
from reactivex import Observable, operators
from reactivex.testing import ReactiveTest
from reactivex.testing.subscription import Subscription
from reactivex.testing.testscheduler import 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 RxException(Exception):
pass
class TestConcatMap(unittest.TestCase):
def test_concat_map_and_flatten_each_item(self):
scheduler = TestScheduler()
e1 = scheduler.create_hot_observable(
on_next(220, 1),
on_next(300, 3),
on_next(330, 5),
on_completed(500),
)
e2 = scheduler.create_cold_observable(
on_next(0, 10), on_next(10, 10), on_next(20, 10), on_completed(30)
)
def create_inner(x: int) -> Observable[int]:
return e2.pipe(operators.map(lambda i: i * x))
def test_create():
return e1.pipe(operators.concat_map(create_inner))
results = scheduler.start(test_create)
assert results.messages == [
on_next(220, 10),
on_next(230, 10),
on_next(240, 10),
on_next(300, 30),
on_next(310, 30),
on_next(320, 30),
on_next(330, 50),
on_next(340, 50),
on_next(350, 50),
on_completed(500),
]
assert e1.subscriptions == [Subscription(200, 500)]
assert e2.subscriptions == [
Subscription(220, 250),
Subscription(300, 330),
Subscription(330, 360),
]
def test_concat_map_many_inner_inner_never_completes(self):
"""should concat_ap many outer to many inner, inner never completes"""
scheduler = TestScheduler()
e1 = scheduler.create_hot_observable(
on_next(210, 1),
on_next(300, 4), # take 4 will never complete
on_next(400, 5),
)
e2 = scheduler.create_cold_observable(
on_next(0, 5), on_next(10, 55), on_next(20, 555)
)
def create_inner(x: int) -> Observable[int]:
return e2.pipe(operators.take(x))
def test_create():
return e1.pipe(operators.concat_map(create_inner))
results = scheduler.start(test_create)
assert results.messages == [
on_next(210, 5),
on_next(300, 5),
on_next(310, 55),
on_next(320, 555),
]
assert e1.subscriptions == [Subscription(200, 1000)]
assert e2.subscriptions == [
Subscription(210, 210),
Subscription(300, 1000), # unsubs when we dispose of e1 at end of test
]
def test_concat_map_finalize_before_next(self):
"""should finalize before moving to the next observable"""
scheduler = TestScheduler()
e1 = scheduler.create_hot_observable(
on_next(210, 2),
on_next(220, 4),
on_next(600, 6),
)
e2 = scheduler.create_cold_observable(
on_next(50, 5), on_next(100, 55), on_completed(100)
)
def create_inner(x: int) -> Observable[int]:
return e2.pipe(operators.map(lambda i: i * x))
def test_create():
return e1.pipe(operators.concat_map(create_inner))
results = scheduler.start(test_create)
assert results.messages == [
on_next(260, 10),
on_next(310, 110),
on_next(310 + 50, 20),
on_next(410, 220),
on_next(650, 30),
on_next(700, 330),
]
assert e1.subscriptions == [Subscription(200, 1000)]
assert e2.subscriptions == [
Subscription(210, 310),
Subscription(310, 410),
Subscription(600, 700),
]
def test_concat_map_inner_errors(self):
"""should propagate errors if the mapped inner throws"""
scheduler = TestScheduler()
e1 = scheduler.create_cold_observable(
on_next(0, 0),
on_next(50, 1),
on_next(100, 2),
)
inners = [
scheduler.create_cold_observable(
on_next(10, 1), on_next(100, 2), on_completed(100)
),
scheduler.create_cold_observable(
on_next(10, 50), on_error(80, Exception("no"))
),
scheduler.create_cold_observable(
on_next(10, 1), on_next(100, 2), on_completed(100)
),
]
def create_inner(x: int) -> Observable[int]:
return inners[x]
def test_create():
return e1.pipe(operators.concat_map(create_inner))
results = scheduler.start(test_create)
assert results.messages == [
on_next(210, 1),
on_next(300, 2),
on_next(310, 50),
on_error(380, Exception("no")),
]
assert e1.subscriptions == [Subscription(200, 380)]
e2, e3, e4 = inners
assert e2.subscriptions == [
Subscription(200, 300),
]
assert e3.subscriptions == [
Subscription(300, 380),
]
assert e4.subscriptions == []
def test_concat_map_outer_errors(self):
scheduler = TestScheduler()
e1 = scheduler.create_hot_observable(
on_next(210, 2),
on_next(220, 4),
on_error(230, Exception("a")),
)
e2 = scheduler.create_cold_observable(on_next(0, 5), on_completed(100))
def create_inner(x: int) -> Observable[int]:
return e2.pipe(operators.map(lambda i: i * x))
def test_create():
return e1.pipe(operators.concat_map(create_inner))
results = scheduler.start(test_create)
assert results.messages == [on_next(210, 10), on_error(230, Exception("a"))]
assert e1.subscriptions == [Subscription(200, 230)]
assert e2.subscriptions == [
Subscription(210, 230)
] # should not be any further sub and should unsub from e2 on outer error
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