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|
import unittest
from datetime import timedelta
from reactivex.scheduler import CatchScheduler, VirtualTimeScheduler
class MyException(Exception):
pass
class CatchSchedulerTestScheduler(VirtualTimeScheduler):
def __init__(self, initial_clock=0.0):
super().__init__(initial_clock)
self.exc = None
def add(self, absolute, relative):
return absolute + relative
def _wrap(self, action):
def _action(scheduler, state=None):
ret = None
try:
ret = action(scheduler, state)
except MyException as e:
self.exc = e
finally:
return ret
return _action
def schedule_absolute(self, duetime, action, state=None):
action = self._wrap(action)
return super().schedule_absolute(duetime, action, state=state)
class TestCatchScheduler(unittest.TestCase):
def test_catch_now(self):
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, lambda ex: True)
diff = scheduler.now - wrapped.now
assert abs(diff) < timedelta(milliseconds=1)
def test_catch_now_units(self):
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, lambda ex: True)
diff = scheduler.now
wrapped.sleep(0.1)
diff = scheduler.now - diff
assert timedelta(milliseconds=80) < diff < timedelta(milliseconds=180)
def test_catch_schedule(self):
ran = False
handled = False
def action(scheduler, state):
nonlocal ran
ran = True
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(action)
wrapped.start()
assert ran is True
assert handled is False
assert wrapped.exc is None
def test_catch_schedule_relative(self):
ran = False
handled = False
def action(scheduler, state):
nonlocal ran
ran = True
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule_relative(0.1, action)
wrapped.start()
assert ran is True
assert handled is False
assert wrapped.exc is None
def test_catch_schedule_absolute(self):
ran = False
handled = False
def action(scheduler, state):
nonlocal ran
ran = True
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule_absolute(0.1, action)
wrapped.start()
assert ran is True
assert handled is False
assert wrapped.exc is None
def test_catch_schedule_error_handled(self):
ran = False
handled = False
def action(scheduler, state):
nonlocal ran
ran = True
raise MyException()
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(action)
wrapped.start()
assert ran is True
assert handled is True
assert wrapped.exc is None
def test_catch_schedule_error_unhandled(self):
ran = False
handled = False
def action(scheduler, state):
nonlocal ran
ran = True
raise MyException()
def handler(_):
nonlocal handled
handled = True
return False
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(action)
wrapped.start()
assert ran is True
assert handled is True
assert isinstance(wrapped.exc, MyException)
def test_catch_schedule_nested(self):
ran = False
handled = False
def inner(scheduler, state):
nonlocal ran
ran = True
def outer(scheduler, state):
scheduler.schedule(inner)
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(outer)
wrapped.start()
assert ran is True
assert handled is False
assert wrapped.exc is None
def test_catch_schedule_nested_error_handled(self):
ran = False
handled = False
def inner(scheduler, state):
nonlocal ran
ran = True
raise MyException()
def outer(scheduler, state):
scheduler.schedule(inner)
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(outer)
wrapped.start()
assert ran is True
assert handled is True
assert wrapped.exc is None
def test_catch_schedule_nested_error_unhandled(self):
ran = False
handled = False
def inner(scheduler, state):
nonlocal ran
ran = True
raise MyException()
def outer(scheduler, state):
scheduler.schedule(inner)
def handler(_):
nonlocal handled
handled = True
return False
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
scheduler.schedule(outer)
wrapped.start()
assert ran is True
assert handled is True
assert isinstance(wrapped.exc, MyException)
def test_catch_schedule_periodic(self):
period = 0.05
counter = 3
handled = False
def action(state):
nonlocal counter
if state:
counter -= 1
return state - 1
if counter == 0:
disp.dispose()
def handler(_):
nonlocal handled
handled = True
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
disp = scheduler.schedule_periodic(period, action, counter)
wrapped.start()
assert counter == 0
assert handled is False
assert wrapped.exc is None
def test_catch_schedule_periodic_error_handled(self):
period = 0.05
counter = 3
handled = False
def action(state):
nonlocal counter
if state:
counter -= 1
return state - 1
if counter == 0:
raise MyException()
def handler(_):
nonlocal handled
handled = True
disp.dispose()
return True
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
disp = scheduler.schedule_periodic(period, action, counter)
wrapped.start()
assert counter == 0
assert handled is True
assert wrapped.exc is None
def test_catch_schedule_periodic_error_unhandled(self):
period = 0.05
counter = 3
handled = False
def action(state):
nonlocal counter
if state:
counter -= 1
return state - 1
if counter == 0:
raise MyException()
def handler(_):
nonlocal handled
handled = True
disp.dispose()
return False
wrapped = CatchSchedulerTestScheduler()
scheduler = CatchScheduler(wrapped, handler)
disp = scheduler.schedule_periodic(period, action, counter)
wrapped.start()
assert counter == 0
assert handled is True
assert isinstance(wrapped.exc, MyException)
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