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import unittest
import reactivex
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 RxException(Exception):
pass
# Helper function for raising exceptions within lambdas
def _raise(ex):
raise RxException(ex)
class TestGenerate(unittest.TestCase):
def test_generate_finite(self):
scheduler = TestScheduler()
def create():
return reactivex.generate(
0,
lambda x: x <= 3,
lambda x: x + 1,
)
results = scheduler.start(create)
assert results.messages == [
on_next(200, 0),
on_next(200, 1),
on_next(200, 2),
on_next(200, 3),
on_completed(200),
]
def test_generate_throw_condition(self):
scheduler = TestScheduler()
ex = "ex"
def create():
return reactivex.generate(
0,
lambda x: _raise("ex"),
lambda x: x + 1,
)
results = scheduler.start(create)
assert results.messages == [on_error(200, ex)]
def test_generate_throw_iterate(self):
scheduler = TestScheduler()
ex = "ex"
def create():
return reactivex.generate(
0,
lambda x: True,
lambda x: _raise(ex),
)
results = scheduler.start(create)
assert results.messages == [on_next(200, 0), on_error(200, ex)]
def test_generate_dispose(self):
scheduler = TestScheduler()
ex = "ex"
def create():
return reactivex.generate(
0,
lambda x: True,
lambda x: x + 1,
)
results = scheduler.start(create, disposed=200)
assert results.messages == []
def test_generate_repeat(self):
scheduler = TestScheduler()
def create():
return reactivex.generate(
0,
lambda x: x <= 3,
lambda x: x + 1,
).pipe(ops.repeat(2))
results = scheduler.start(create)
assert results.messages == [
on_next(200, 0),
on_next(200, 1),
on_next(200, 2),
on_next(200, 3),
on_next(200, 0),
on_next(200, 1),
on_next(200, 2),
on_next(200, 3),
on_completed(200),
]
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