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import unittest
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 TestIsEmpty(unittest.TestCase):
def test_is_empty_empty(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_completed(250))
def create():
return xs.pipe(ops.is_empty())
res = scheduler.start(create=create).messages
assert res == [on_next(250, True), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_is_empty_return(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(250)
)
def create():
return xs.pipe(ops.is_empty())
res = scheduler.start(create=create).messages
assert res == [on_next(210, False), on_completed(210)]
assert xs.subscriptions == [subscribe(200, 210)]
def test_is_empty_on_error(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_error(210, ex))
def create():
return xs.pipe(ops.is_empty())
res = scheduler.start(create=create).messages
assert res == [on_error(210, ex)]
assert xs.subscriptions == [subscribe(200, 210)]
def test_is_empty_never(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1))
def create():
return xs.pipe(ops.is_empty())
res = scheduler.start(create=create).messages
assert res == []
assert xs.subscriptions == [subscribe(200, 1000)]
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