def test_when_never_never(self):
scheduler = TestScheduler()
xs = Observable.never()
ys = Observable.never()
def create():
def selector(x, y):
return x + y
return Observable.when(xs.and_(ys).then_do(selector))
results = scheduler.start(create)
results.messages.assert_equal()
def create():
def on_next(x):
i[0] += 1
def on_completed():
completed = True
return Observable.never().do_action(on_next=on_next,
on_completed=on_completed)
def test_publish_with_initial_value_multiple_connections(self):
xs = Observable.never()
ys = xs.publish_value(1979)
connection1 = ys.connect()
connection2 = ys.connect()
assert(connection1 == connection2)
connection1.dispose()
connection2.dispose()
connection3 = ys.connect()
assert(connection1 != connection3)
def test_replay_time_multiple_connections(self):
xs = Observable.never()
ys = xs.replay(None, None, 100)
connection1 = ys.connect()
connection2 = ys.connect()
assert(connection1 == connection2)
connection1.dispose()
connection2.dispose()
connection3 = ys.connect()
assert(connection1 != connection3)
def test_publish_with_initial_value_multiple_connections(self):
xs = Observable.never()
ys = xs.publish_value(1979)
connection1 = ys.connect()
connection2 = ys.connect()
assert (connection1 == connection2)
connection1.dispose()
connection2.dispose()
connection3 = ys.connect()
assert (connection1 != connection3)
def timeoutIndividual(self, durationSelector, firstTimeout=None, other=None):
assert isinstance(self, Observable)
if firstTimeout == None:
firstTimeout = Observable.never()
if other == None:
other = Observable.throw(TimeoutException())
assert isinstance(firstTimeout, Observable)
assert isinstance(other, Observable)
return TimeoutObservable(self, firstTimeout, durationSelector, other)
def amb(cls, *args):
"""Propagates the observable sequence that reacts first.
E.g. winner = Rx.Observable.amb(xs, ys, zs)
Returns an observable sequence that surfaces any of the given sequences, whichever reacted first.
"""
acc = Observable.never()
if isinstance(args[0], list):
items = args[0]
else:
items = list(args)
def func(previous, current):
return previous.amb(current)
for item in items:
acc = func(acc, item)
return acc
def amb(cls, *args):
"""Propagates the observable sequence that reacts first.
E.g. winner = Rx.Observable.amb(xs, ys, zs)
Returns an observable sequence that surfaces any of the given sequences, whichever reacted first.
"""
acc = Observable.never()
if isinstance(args[0], list):
items = args[0]
else:
items = list(args)
def func(previous, current):
return previous.amb(current)
for item in items:
acc = func(acc, item)
return acc
def timeout_with_selector(self, first_timeout=None,
timeout_duration_selector=None, other=None):
"""Returns the source observable sequence, switching to the other
observable sequence if a timeout is signaled.
1 - res = source.timeout_with_selector(rx.Observable.timer(500))
2 - res = source.timeout_with_selector(rx.Observable.timer(500),
lambda x: rx.Observable.timer(200))
3 - res = source.timeout_with_selector(rx.Observable.timer(500),
lambda x: rx.Observable.timer(200)),
rx.Observable.return_value(42))
first_timeout -- [Optional] Observable sequence that represents the
timeout for the first element. If not provided, this defaults to
Observable.never().
timeout_Duration_selector -- [Optional] Selector to retrieve an
observable sequence that represents the timeout between the current
element and the next element.
other -- [Optional] Sequence to return in case of a timeout. If not
provided, this is set to Observable.throw_exception().
Returns the source sequence switching to the other sequence in case of
a timeout.
"""
first_timeout = first_timeout or Observable.never()
other = other or Observable.throw_exception(Exception('Timeout'))
source = self
def subscribe(observer):
subscription = SerialDisposable()
timer = SerialDisposable()
original = SingleAssignmentDisposable()
subscription.disposable = original
switched = False
_id = [0]
def set_timer(timeout):
my_id = _id[0]
def timer_wins():
return _id[0] == my_id
d = SingleAssignmentDisposable()
timer.disposable = d
def on_next(x):
if timer_wins():
subscription.disposable = other.subscribe(observer)
d.dispose()
def on_error(e):
if timer_wins():
observer.on_error(e)
def on_completed():
if timer_wins():
subscription.disposable = other.subscribe(observer)
d.disposable = timeout.subscribe(on_next, on_error, on_completed)
set_timer(first_timeout)
def observer_wins():
res = not switched
if res:
_id[0] += 1
return res
def on_next(x):
if observer_wins():
observer.on_next(x)
timeout = None
try:
timeout = timeout_duration_selector(x)
except Exception as e:
observer.on_error(e)
return
set_timer(timeout)
def on_error(e):
if observer_wins():
observer.on_error(e)
def on_completed():
if observer_wins():
observer.on_completed()
original.disposable = source.subscribe(on_next, on_error, on_completed)
return CompositeDisposable(subscription, timer)
return AnonymousObservable(subscribe)
def create():
return Observable.never().as_observable()
def timeout_with_selector(self, first_timeout=None,
timeout_duration_selector=None, other=None):
"""Returns the source observable sequence, switching to the other
observable sequence if a timeout is signaled.
1 - res = source.timeout_with_selector(rx.Observable.timer(500))
2 - res = source.timeout_with_selector(rx.Observable.timer(500),
lambda x: rx.Observable.timer(200))
3 - res = source.timeout_with_selector(rx.Observable.timer(500),
lambda x: rx.Observable.timer(200)),
rx.Observable.return_value(42))
first_timeout -- [Optional] Observable sequence that represents the
timeout for the first element. If not provided, this defaults to
Observable.never().
timeout_Duration_selector -- [Optional] Selector to retrieve an
observable sequence that represents the timeout between the current
element and the next element.
other -- [Optional] Sequence to return in case of a timeout. If not
provided, this is set to Observable.throw_exception().
Returns the source sequence switching to the other sequence in case of
a timeout.
"""
first_timeout = first_timeout or Observable.never()
other = other or Observable.throw_exception(Exception('Timeout'))
source = self
def subscribe(observer):
subscription = SerialDisposable()
timer = SerialDisposable()
original = SingleAssignmentDisposable()
subscription.disposable = original
switched = False
_id = [0]
def set_timer(timeout):
my_id = _id[0]
def timer_wins():
return _id[0] == my_id
d = SingleAssignmentDisposable()
timer.disposable = d
def on_next(x):
if timer_wins():
subscription.disposable = other.subscribe(observer)
d.dispose()
def on_error(e):
if timer_wins():
observer.on_error(e)
def on_completed():
if timer_wins():
subscription.disposable = other.subscribe(observer)
d.disposable = timeout.subscribe(on_next, on_error, on_completed)
set_timer(first_timeout)
def observer_wins():
res = not switched
if res:
_id[0] += 1
return res
def on_next(x):
if observer_wins():
observer.on_next(x)
timeout = None
try:
timeout = timeout_duration_selector(x)
except Exception as e:
observer.on_error(e)
return
set_timer(timeout)
def on_error(e):
if observer_wins():
observer.on_error(e)
def on_completed():
if observer_wins():
observer.on_completed()
original.disposable = source.subscribe(on_next, on_error, on_completed)
return CompositeDisposable(subscription, timer)
return AnonymousObservable(subscribe)
def create():
def on_next(x):
i[0] += 1
def on_completed():
completed = True
return Observable.never().do_action(on_next=on_next, on_completed=on_completed)
def create():
return Observable.never().as_observable()