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import unittest
from reactivex import operators as _
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 TestCount(unittest.TestCase):
def test_count_empty(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_completed(250))
res = scheduler.start(create=lambda: xs.pipe(_.count())).messages
assert res == [on_next(250, 0), on_completed(250)]
def test_count_empty_ii(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(250)
)
def create():
return xs.pipe(_.count())
res = scheduler.start(create=create).messages
assert res == [on_next(250, 1), on_completed(250)]
def test_count_some(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(220, 3),
on_next(230, 4),
on_completed(250),
)
res = scheduler.start(create=lambda: xs.pipe(_.count())).messages
assert res == [on_next(250, 3), on_completed(250)]
def test_count_on_error(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_error(210, ex))
res = scheduler.start(create=lambda: xs.pipe(_.count())).messages
assert res == [on_error(210, ex)]
def test_count_never(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1))
res = scheduler.start(create=lambda: xs.pipe(_.count())).messages
assert res == []
def test_count_predicate_empty_true(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_completed(250))
def create():
return xs.pipe(_.count(lambda _: True))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 0), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_empty_false(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_completed(250))
def create():
return xs.pipe(_.count(lambda _: False))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 0), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_return_true(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(250)
)
def create():
return xs.pipe(_.count(lambda _: True))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 1), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_return_false(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(250)
)
def create():
return xs.pipe(_.count(lambda _: False))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 0), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_some_all(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(220, 3),
on_next(230, 4),
on_completed(250),
)
def create():
return xs.pipe(_.count(lambda x: x < 10))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 3), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_some_none(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(220, 3),
on_next(230, 4),
on_completed(250),
)
def create():
return xs.pipe(_.count(lambda x: x > 10))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 0), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_some_even(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1),
on_next(210, 2),
on_next(220, 3),
on_next(230, 4),
on_completed(250),
)
def create():
return xs.pipe(_.count(lambda x: x % 2 == 0))
res = scheduler.start(create=create)
assert res.messages == [on_next(250, 2), on_completed(250)]
assert xs.subscriptions == [subscribe(200, 250)]
def test_count_predicate_throw_true(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_error(210, ex))
def create():
return xs.pipe(_.count(lambda _: True))
res = scheduler.start(create=create)
assert res.messages == [on_error(210, ex)]
assert xs.subscriptions == [subscribe(200, 210)]
def test_count_predicate_throw_false(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_error(210, ex))
def create():
return xs.pipe(_.count(lambda _: False))
res = scheduler.start(create=create)
assert res.messages == [on_error(210, ex)]
assert xs.subscriptions == [subscribe(200, 210)]
def test_count_predicate_never(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1))
def create():
return xs.pipe(_.count(lambda _: True))
res = scheduler.start(create=create)
assert res.messages == []
assert xs.subscriptions == [subscribe(200, 1000)]
def test_count_predicate_predicate_throws(self):
ex = "ex"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_next(230, 3), on_completed(240)
)
def create():
def predicate(x):
if x == 3:
raise Exception(ex)
else:
return True
return xs.pipe(_.count(predicate))
res = scheduler.start(create=create)
assert res.messages == [on_error(230, ex)]
assert xs.subscriptions == [subscribe(200, 230)]
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