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from reactivex import Observer
from reactivex.notification import OnCompleted, OnError, OnNext, from_notifier
class MyObserver(Observer):
def __init__(self):
super().__init__()
self.has_on_next = None
self.has_on_completed = None
self.has_on_error = None
def _on_next_core(self, value):
self.has_on_next = value
def _on_error_core(self, error: Exception):
self.has_on_error = str(error)
def _on_completed_core(self):
self.has_on_completed = True
def test_to_observer_notification_on_next():
i = 0
def next(n):
assert i == 0
assert n.kind == "N"
assert n.value == 42
assert not hasattr(n, "exception")
assert n.has_value
from_notifier(next).on_next(42)
def test_to_observer_notification_on_error():
ex = "ex"
i = 0
def next(n):
assert i == 0
assert n.kind == "E"
assert str(n.exception) == ex
assert not n.has_value
from_notifier(next).on_error(ex)
def test_to_observer_notification_completed():
i = 0
def next(n):
assert i == 0
assert n.kind == "C"
assert not n.has_value
from_notifier(next).on_completed()
def test_to_notifier_forwards():
obsn = MyObserver()
obsn.to_notifier()(OnNext(42))
assert obsn.has_on_next == 42
ex = "ex"
obse = MyObserver()
obse.to_notifier()(OnError(ex))
assert ex == obse.has_on_error
obsc = MyObserver()
obsc.to_notifier()(OnCompleted())
assert obsc.has_on_completed
def test_create_on_next():
next = [False]
def on_next(x):
assert 42 == x
next[0] = True
res = Observer(on_next)
res.on_next(42)
assert next[0]
return res.on_completed()
def test_create_on_next_has_error():
ex = "ex"
next = [False]
_e = None
def on_next(x):
assert 42 == x
next[0] = True
res = Observer(on_next)
res.on_next(42)
assert next[0]
try:
res.on_error(ex)
assert False
except Exception as e:
e_ = e.args[0]
assert ex == e_
def test_create_on_next_on_completed():
next = [False]
completed = [False]
def on_next(x):
assert 42 == x
next[0] = True
return next[0]
def on_completed():
completed[0] = True
return completed[0]
res = Observer(on_next, None, on_completed)
res.on_next(42)
assert next[0]
assert not completed[0]
res.on_completed()
assert completed[0]
def test_create_on_next_close_has_error():
e_ = None
ex = "ex"
next = [False]
completed = [False]
def on_next(x):
assert 42 == x
next[0] = True
def on_completed():
completed[0] = True
res = Observer(on_next, None, on_completed)
res.on_next(42)
assert next[0]
assert not completed[0]
try:
res.on_error(ex)
assert False
except Exception as e:
e_ = e.args[0]
assert ex == e_
assert not completed[0]
def test_create_on_next_on_error():
ex = "ex"
next = [True]
error = [False]
def on_next(x):
assert 42 == x
next[0] = True
def on_error(e):
assert ex == e
error[0] = True
res = Observer(on_next, on_error)
res.on_next(42)
assert next[0]
assert not error[0]
res.on_error(ex)
assert error[0]
def test_create_on_next_throw_hit_completed():
ex = "ex"
next = [True]
error = [False]
def on_next(x):
assert 42 == x
next[0] = True
def on_error(e):
assert ex == e
error[0] = True
res = Observer(on_next, on_error)
res.on_next(42)
assert next[0]
assert not error[0]
res.on_completed()
assert not error[0]
def test_create_on_next_throw_close1():
ex = "ex"
next = [True]
error = [False]
completed = [False]
def on_next(x):
assert 42 == x
next[0] = True
def on_error(e):
assert ex == e
error[0] = True
def on_completed():
completed[0] = True
res = Observer(on_next, on_error, on_completed)
res.on_next(42)
assert next[0]
assert not error[0]
assert not completed[0]
res.on_completed()
assert completed[0]
assert not error[0]
def test_create_on_next_throw_close2():
ex = "ex"
next = [True]
error = [False]
completed = [False]
def on_next(x):
assert 42 == x
next[0] = True
def on_error(e):
assert ex == e
error[0] = True
def on_completed():
completed[0] = True
res = Observer(on_next, on_error, on_completed)
res.on_next(42)
assert next[0]
assert not error[0]
assert not completed[0]
res.on_error(ex)
assert not completed[0]
assert error[0]
def test_as_observer_hides():
obs = MyObserver()
res = obs.as_observer()
assert res != obs
assert not isinstance(res, obs.__class__)
def test_as_observer_forwards():
obsn = MyObserver()
obsn.as_observer().on_next(42)
assert obsn.has_on_next == 42
ex = "ex"
obse = MyObserver()
obse.as_observer().on_error(ex)
assert obse.has_on_error == ex
obsc = MyObserver()
obsc.as_observer().on_completed()
assert obsc.has_on_completed
if __name__ == "__main__":
test_to_notifier_forwards()
|
