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taskhandler suppress cancel error

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Added an errback to handle errors within task handler's deferred instance.
Without this instances of deferred cause a traceback when a deferred is canceled without errback or callback having been called.
This traceback does not end execution, and ultimately would only show to main console.
Reference cancel: https://github.com/twisted/twisted/blob/trunk/src/twisted/internet/defer.py

All evennia unit tests pass.
This commit is contained in:
davewiththenicehat 2021-04-16 10:55:24 -04:00
parent 1a18b247e2
commit c7bf773605
2 changed files with 22 additions and 2 deletions
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8
evennia/utils/tests/test_utils.py
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@ -10,7 +10,7 @@ import mock
from django.test import TestCase
from datetime import datetime
from twisted.internet import task, reactor
from twisted.internet import task
from evennia.utils.ansi import ANSIString
from evennia.utils import utils
@ -338,3 +338,9 @@ class TestDelay(EvenniaTest):
_TASK_HANDLER.clock.advance(1) # make time pass
self.assertEqual(self.char1.ndb.dummy_var, 'dummy_func ran')
self.char1.ndb.dummy_var = False
# test canceling a deferral.
deferal_inst = utils.delay(1, dummy_func, self.char1.dbref)
deferal_inst.cancel()
_TASK_HANDLER.clock.advance(1) # make time pass
self.assertEqual(self.char1.ndb.dummy_var, False)
self.char1.ndb.dummy_var = False