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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 RxException(Exception):
pass
# Helper function for raising exceptions within lambdas
def _raise(ex):
raise RxException(ex)
class TestSample(unittest.TestCase):
def test_sample_regular(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(230, 3),
on_next(260, 4),
on_next(300, 5),
on_next(350, 6),
on_next(380, 7),
on_completed(390),
)
def create():
return xs.pipe(ops.sample(50))
results = scheduler.start(create)
assert results.messages == [
on_next(250, 3),
on_next(300, 5),
on_next(350, 6),
on_next(400, 7),
on_completed(400),
]
def test_sample_error_in_flight(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(230, 3),
on_next(260, 4),
on_next(300, 5),
on_next(310, 6),
on_error(330, ex),
)
def create():
return xs.pipe(ops.sample(50))
results = scheduler.start(create)
assert results.messages == [on_next(250, 3), on_next(300, 5), on_error(330, ex)]
def test_sample_empty(self):
scheduler = TestScheduler()
def create():
return reactivex.empty().pipe(ops.sample(0))
results = scheduler.start(create)
assert results.messages == [on_completed(200)]
def test_sample_error(self):
ex = "ex"
scheduler = TestScheduler()
def create():
return reactivex.throw(ex).pipe(ops.sample(0))
results = scheduler.start(create)
assert results.messages == [on_error(200, ex)]
def test_sample_never(self):
scheduler = TestScheduler()
def create():
return reactivex.never().pipe(ops.sample(1))
results = scheduler.start(create)
assert results.messages == []
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