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import unittest
import reactivex
from reactivex.disposable import SerialDisposable
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 TestReturnValue(unittest.TestCase):
def test_return_basic(self):
scheduler = TestScheduler()
def factory():
return reactivex.return_value(42)
results = scheduler.start(factory)
assert results.messages == [on_next(200, 42), on_completed(200)]
def test_return_disposed(self):
scheduler = TestScheduler()
def factory():
return reactivex.return_value(42)
results = scheduler.start(factory, disposed=200)
assert results.messages == []
def test_return_disposed_after_next(self):
scheduler = TestScheduler()
d = SerialDisposable()
xs = reactivex.return_value(42)
results = scheduler.create_observer()
def action(scheduler, state):
def on_next(x):
d.dispose()
results.on_next(x)
def on_error(e):
results.on_error(e)
def on_completed():
results.on_completed()
d.disposable = xs.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
return d.disposable
scheduler.schedule_absolute(100, action)
scheduler.start()
assert results.messages == [on_next(100, 42)]
def test_return_observer_throws(self):
scheduler1 = TestScheduler()
xs = reactivex.return_value(1)
xs.subscribe(lambda x: _raise("ex"), scheduler=scheduler1)
self.assertRaises(RxException, scheduler1.start)
scheduler2 = TestScheduler()
ys = reactivex.return_value(1)
ys.subscribe(
lambda x: x, lambda ex: ex, lambda: _raise("ex"), scheduler=scheduler2
)
self.assertRaises(RxException, scheduler2.start)
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