def test__logs_failures_from_cancellers(self):
logger = self.useFixture(TwistedLoggerFixture())
canceller = Mock()
canceller.side_effect = factory.make_exception()
dhooks = DeferredHooks()
d = Deferred(canceller)
dhooks.add(d)
dhooks.reset()
self.assertThat(dhooks.hooks, HasLength(0))
# The hook has not been fired, but because the user-supplied canceller
# has failed we're not in a position to know what to do. This reflects
# a programming error and not a run-time error that we ought to be
# prepared for, so it is left as-is.
self.assertThat(d, IsUnfiredDeferred())
self.assertDocTestMatches(
dedent("""\
Failure when cancelling hook.
Traceback (most recent call last):
...
maastesting.factory.TestException#...
"""),
logger.output,
)
def test_init(self):
protocol = common.RPCProtocol()
self.assertThat(protocol.onConnectionMade, IsUnfiredDeferred())
self.assertThat(protocol.onConnectionLost, IsUnfiredDeferred())
self.assertThat(protocol, IsInstance(amp.AMP))
def test__does_not_match_non_deferred(self):
self.assertMismatch(IsUnfiredDeferred().match(object()),
" is not a Deferred")
def test__does_not_match_fired_deferred(self):
d = defer.Deferred()
d.callback(None)
self.assertMismatch(IsUnfiredDeferred().match(d),
" has been called (result=None)")
def test__matches_unfired_deferred(self):
d = defer.Deferred()
self.assertThat(d, IsUnfiredDeferred())