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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 TestFind(unittest.TestCase):
def test_find_never(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1))
def create():
return xs.pipe(ops.find(lambda x, i, s: True))
res = scheduler.start(create)
assert res.messages == []
def test_find_empty(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(on_next(150, 1), on_completed(210))
def create():
return xs.pipe(ops.find(lambda x, i, s: True))
res = scheduler.start(create)
assert res.messages == [on_next(210, None), on_completed(210)]
def test_find_single(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(220)
)
def create():
return xs.pipe(ops.find(lambda x, i, s: x == 2))
res = scheduler.start(create)
assert res.messages == [on_next(210, 2), on_completed(210)]
def test_find_notfound(self):
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(220)
)
def create():
return xs.pipe(ops.find(lambda x, i, s: x == 3))
res = scheduler.start(create)
assert res.messages == [on_next(220, None), on_completed(220)]
def test_find_Error(self):
ex = Exception("error")
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_error(220, ex)
)
def create():
return xs.pipe(ops.find(lambda x, i, s: x == 3))
res = scheduler.start(create)
assert res.messages == [on_error(220, ex)]
def test_find_throws(self):
ex = "error"
scheduler = TestScheduler()
xs = scheduler.create_hot_observable(
on_next(150, 1), on_next(210, 2), on_completed(220)
)
def create():
def predicate(x, i, source):
raise Exception(ex)
return xs.pipe(ops.find(predicate))
res = scheduler.start(create)
assert res.messages == [on_error(210, ex)]
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