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import twisted.python.failure
from twisted.internet import defer, reactor
from synapse.logging.context import (
SENTINEL_CONTEXT,
LoggingContext,
PreserveLoggingContext,
current_context,
make_deferred_yieldable,
nested_logging_context,
run_in_background,
)
from synapse.util import Clock
from .. import unittest
class LoggingContextTestCase(unittest.TestCase):
def _check_test_key(self, value):
self.assertEqual(current_context().name, value)
def test_with_context(self):
with LoggingContext("test"):
self._check_test_key("test")
@defer.inlineCallbacks
def test_sleep(self):
clock = Clock(reactor)
@defer.inlineCallbacks
def competing_callback():
with LoggingContext("competing"):
yield clock.sleep(0)
self._check_test_key("competing")
reactor.callLater(0, competing_callback)
with LoggingContext("one"):
yield clock.sleep(0)
self._check_test_key("one")
def _test_run_in_background(self, function):
sentinel_context = current_context()
callback_completed = [False]
with LoggingContext("one"):
# fire off function, but don't wait on it.
d2 = run_in_background(function)
def cb(res):
callback_completed[0] = True
return res
d2.addCallback(cb)
self._check_test_key("one")
# now wait for the function under test to have run, and check that
# the logcontext is left in a sane state.
d2 = defer.Deferred()
def check_logcontext():
if not callback_completed[0]:
reactor.callLater(0.01, check_logcontext)
return
# make sure that the context was reset before it got thrown back
# into the reactor
try:
self.assertIs(current_context(), sentinel_context)
d2.callback(None)
except BaseException:
d2.errback(twisted.python.failure.Failure())
reactor.callLater(0.01, check_logcontext)
# test is done once d2 finishes
return d2
def test_run_in_background_with_blocking_fn(self):
@defer.inlineCallbacks
def blocking_function():
yield Clock(reactor).sleep(0)
return self._test_run_in_background(blocking_function)
def test_run_in_background_with_non_blocking_fn(self):
@defer.inlineCallbacks
def nonblocking_function():
with PreserveLoggingContext():
yield defer.succeed(None)
return self._test_run_in_background(nonblocking_function)
def test_run_in_background_with_chained_deferred(self):
# a function which returns a deferred which looks like it has been
# called, but is actually paused
def testfunc():
return make_deferred_yieldable(_chained_deferred_function())
return self._test_run_in_background(testfunc)
def test_run_in_background_with_coroutine(self):
async def testfunc():
self._check_test_key("one")
d = Clock(reactor).sleep(0)
self.assertIs(current_context(), SENTINEL_CONTEXT)
await d
self._check_test_key("one")
return self._test_run_in_background(testfunc)
def test_run_in_background_with_nonblocking_coroutine(self):
async def testfunc():
self._check_test_key("one")
return self._test_run_in_background(testfunc)
@defer.inlineCallbacks
def test_make_deferred_yieldable(self):
# a function which returns an incomplete deferred, but doesn't follow
# the synapse rules.
def blocking_function():
d = defer.Deferred()
reactor.callLater(0, d.callback, None)
return d
sentinel_context = current_context()
with LoggingContext("one"):
d1 = make_deferred_yieldable(blocking_function())
# make sure that the context was reset by make_deferred_yieldable
self.assertIs(current_context(), sentinel_context)
yield d1
# now it should be restored
self._check_test_key("one")
@defer.inlineCallbacks
def test_make_deferred_yieldable_with_chained_deferreds(self):
sentinel_context = current_context()
with LoggingContext("one"):
d1 = make_deferred_yieldable(_chained_deferred_function())
# make sure that the context was reset by make_deferred_yieldable
self.assertIs(current_context(), sentinel_context)
yield d1
# now it should be restored
self._check_test_key("one")
def test_nested_logging_context(self):
with LoggingContext("foo"):
nested_context = nested_logging_context(suffix="bar")
self.assertEqual(nested_context.name, "foo-bar")
# a function which returns a deferred which has been "called", but
# which had a function which returned another incomplete deferred on
# its callback list, so won't yet call any other new callbacks.
def _chained_deferred_function():
d = defer.succeed(None)
def cb(res):
d2 = defer.Deferred()
reactor.callLater(0, d2.callback, res)
return d2
d.addCallback(cb)
return d
|
