Move test stuff to tests

This commit is contained in:
Erik Johnston 2018-01-18 11:53:21 +00:00
parent 2f18a2647b
commit 1432f7ccd5
2 changed files with 47 additions and 33 deletions

View file

@ -13,7 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer, threads, reactor
from twisted.internet import threads, reactor
from synapse.util.logcontext import make_deferred_yieldable
@ -57,10 +57,6 @@ class BackgroundFileConsumer(object):
# If the _writer thread throws an exception it gets stored here.
self._write_exception = None
# A deferred that gets resolved when the bytes_queue gets empty.
# Mainly used for tests.
self._notify_empty_deferred = None
def registerProducer(self, producer, streaming):
"""Part of IConsumer interface
@ -113,9 +109,6 @@ class BackgroundFileConsumer(object):
if self._bytes_queue.qsize() <= self._RESUME_ON_QUEUE_SIZE:
reactor.callFromThread(self._resume_paused_producer)
if self._notify_empty_deferred and self._bytes_queue.empty():
reactor.callFromThread(self._notify_empty)
bytes = self._bytes_queue.get()
# If we get a None (or empty list) then that's a signal used
@ -144,20 +137,3 @@ class BackgroundFileConsumer(object):
if self._paused_producer and self._producer:
self._paused_producer = False
self._producer.resumeProducing()
def _notify_empty(self):
"""Called when the _writer thread thinks the queue may be empty and
we should notify anything waiting on `wait_for_writes`
"""
if self._notify_empty_deferred and self._bytes_queue.empty():
d = self._notify_empty_deferred
self._notify_empty_deferred = None
d.callback(None)
def wait_for_writes(self):
"""Wait for the write queue to be empty and for writes to have
finished. This is mainly useful for tests.
"""
if not self._notify_empty_deferred:
self._notify_empty_deferred = defer.Deferred()
return self._notify_empty_deferred

View file

@ -14,7 +14,7 @@
# limitations under the License.
from twisted.internet import defer
from twisted.internet import defer, reactor
from mock import NonCallableMock
from synapse.util.file_consumer import BackgroundFileConsumer
@ -53,7 +53,7 @@ class FileConsumerTests(unittest.TestCase):
@defer.inlineCallbacks
def test_push_consumer(self):
string_file = StringIO()
string_file = BlockingStringWrite()
consumer = BackgroundFileConsumer(string_file)
try:
@ -62,14 +62,14 @@ class FileConsumerTests(unittest.TestCase):
consumer.registerProducer(producer, True)
consumer.write("Foo")
yield consumer.wait_for_writes()
yield string_file.wait_for_n_writes(1)
self.assertEqual(string_file.getvalue(), "Foo")
self.assertEqual(string_file.buffer, "Foo")
consumer.write("Bar")
yield consumer.wait_for_writes()
yield string_file.wait_for_n_writes(2)
self.assertEqual(string_file.getvalue(), "FooBar")
self.assertEqual(string_file.buffer, "FooBar")
finally:
consumer.unregisterProducer()
@ -85,15 +85,22 @@ class FileConsumerTests(unittest.TestCase):
try:
producer = NonCallableMock(spec_set=["pauseProducing", "resumeProducing"])
resume_deferred = defer.Deferred()
producer.resumeProducing.side_effect = lambda: resume_deferred.callback(None)
consumer.registerProducer(producer, True)
number_writes = 0
with string_file.write_lock:
for _ in range(consumer._PAUSE_ON_QUEUE_SIZE):
consumer.write("Foo")
number_writes += 1
producer.pauseProducing.assert_called_once()
yield consumer.wait_for_writes()
yield string_file.wait_for_n_writes(number_writes)
yield resume_deferred
producer.resumeProducing.assert_called_once()
finally:
consumer.unregisterProducer()
@ -131,8 +138,39 @@ class BlockingStringWrite(object):
self.closed = False
self.write_lock = threading.Lock()
self._notify_write_deferred = None
self._number_of_writes = 0
def write(self, bytes):
self.buffer += bytes
with self.write_lock:
self.buffer += bytes
self._number_of_writes += 1
reactor.callFromThread(self._notify_write)
def close(self):
self.closed = True
def _notify_write(self):
"Called by write to indicate a write happened"
with self.write_lock:
if not self._notify_write_deferred:
return
d = self._notify_write_deferred
self._notify_write_deferred = None
d.callback(None)
@defer.inlineCallbacks
def wait_for_n_writes(self, n):
"Wait for n writes to have happened"
while True:
with self.write_lock:
if n <= self._number_of_writes:
return
if not self._notify_write_deferred:
self._notify_write_deferred = defer.Deferred()
d = self._notify_write_deferred
yield d