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import unittest
import reactivex
from reactivex.testing import MockDisposable, 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 TestUsing(unittest.TestCase):
def test_using_null(self):
disp = [None]
xs = [None]
_d = [None]
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
def create():
def create_resources():
dispose_invoked[0] += 1
disp[0] = None
return disp[0]
def create_observable(d):
_d[0] = d
create_invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_completed(200)
)
return xs[0]
return reactivex.using(create_resources, create_observable)
results = scheduler.start(create)
assert disp[0] == _d[0]
assert results.messages == [on_next(300, 200), on_completed(400)]
assert 1 == create_invoked[0]
assert 1 == dispose_invoked[0]
assert xs[0].subscriptions == [subscribe(200, 400)]
assert disp[0] is None
def test_using_complete(self):
disp = [None]
xs = [None]
_d = [None]
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
def create():
def create_resource():
dispose_invoked[0] += 1
disp[0] = MockDisposable(scheduler)
return disp[0]
def create_observable(d):
_d[0] = d
create_invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_completed(200)
)
return xs[0]
return reactivex.using(create_resource, create_observable)
results = scheduler.start(create)
assert disp == _d
assert results.messages == [on_next(300, 200), on_completed(400)]
assert create_invoked[0] == 1
assert dispose_invoked[0] == 1
assert xs[0].subscriptions == [subscribe(200, 400)]
disp[0].disposes = [200, 400]
def test_using_error(self):
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
ex = "ex"
disp = [None]
xs = [None]
_d = [None]
def create():
def create_resource():
dispose_invoked[0] += 1
disp[0] = MockDisposable(scheduler)
return disp[0]
def create_observable(d):
_d[0] = d
create_invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_error(200, ex)
)
return xs[0]
return reactivex.using(create_resource, create_observable)
results = scheduler.start(create)
assert disp[0] == _d[0]
assert results.messages == [on_next(300, 200), on_error(400, ex)]
assert create_invoked[0] == 1
assert dispose_invoked[0] == 1
assert xs[0].subscriptions == [subscribe(200, 400)]
assert disp[0].disposes == [200, 400]
def test_using_dispose(self):
disp = [None]
xs = [None]
_d = [None]
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
def create():
def create_resource():
dispose_invoked[0] += 1
disp[0] = MockDisposable(scheduler)
return disp[0]
def create_observable(d):
_d[0] = d
create_invoked[0] += 1
xs[0] = scheduler.create_cold_observable(
on_next(100, scheduler.clock), on_next(1000, scheduler.clock + 1)
)
return xs[0]
return reactivex.using(create_resource, create_observable)
results = scheduler.start(create)
assert disp[0] == _d[0]
assert results.messages == [on_next(300, 200)]
assert 1 == create_invoked[0]
assert 1 == dispose_invoked[0]
assert xs[0].subscriptions == [subscribe(200, 1000)]
assert disp[0].disposes == [200, 1000]
def test_using_throw_resource_mapper(self):
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
ex = "ex"
def create():
def create_resource():
dispose_invoked[0] += 1
raise _raise(ex)
def create_observable(d):
create_invoked[0] += 1
return reactivex.never()
return reactivex.using(create_resource, create_observable)
results = scheduler.start(create)
assert results.messages == [on_error(200, ex)]
assert 0 == create_invoked[0]
assert 1 == dispose_invoked[0]
def test_using_throw_resource_usage(self):
scheduler = TestScheduler()
dispose_invoked = [0]
create_invoked = [0]
disp = [None]
ex = "ex"
def create():
def create_resource():
dispose_invoked[0] += 1
disp[0] = MockDisposable(scheduler)
return disp[0]
def create_observable(d):
create_invoked[0] += 1
_raise(ex)
return reactivex.using(create_resource, create_observable)
results = scheduler.start(create)
assert results.messages == [on_error(200, ex)]
assert create_invoked[0] == 1
assert dispose_invoked[0] == 1
assert disp[0].disposes == [200, 200]
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