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import unittest
import reactivex
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 TestDefer(unittest.TestCase):
def test_defer_complete(self):
xs = [None]
invoked = [0]
scheduler = TestScheduler()
def create():
def defer(scheduler):
invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_completed(200)
)
return xs[0]
return reactivex.defer(defer)
results = scheduler.start(create)
assert results.messages == [on_next(300, 200), on_completed(400)]
assert 1 == invoked[0]
assert xs[0].subscriptions == [subscribe(200, 400)]
def test_defer_error(self):
scheduler = TestScheduler()
invoked = [0]
xs = [None]
ex = "ex"
def create():
def defer(scheduler):
invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_error(200, ex)
)
return xs[0]
return reactivex.defer(defer)
results = scheduler.start(create)
assert results.messages == [on_next(300, 200), on_error(400, ex)]
assert 1 == invoked[0]
assert xs[0].subscriptions == [subscribe(200, 400)]
def test_defer_dispose(self):
scheduler = TestScheduler()
invoked = [0]
xs = [None]
def create():
def defer(scheduler):
invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock),
on_next(200, invoked[0]),
on_next(1100, 1000),
)
return xs[0]
return reactivex.defer(defer)
results = scheduler.start(create)
assert results.messages == [on_next(300, 200), on_next(400, 1)]
assert 1 == invoked[0]
assert xs[0].subscriptions == [subscribe(200, 1000)]
def test_defer_on_error(self):
scheduler = TestScheduler()
invoked = [0]
ex = "ex"
def create():
def defer(scheduler):
invoked[0] += 1
raise Exception(ex)
return reactivex.defer(defer)
results = scheduler.start(create)
assert results.messages == [on_error(200, ex)]
assert 1 == invoked[0]
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