def test_send_to_new_contact_failed_to_connect(self):
"""
Sending a message to a new but unreachable contact results in the
resulting deferred to be resolved with the expected exception.
"""
nc = NetstringConnector(self.event_loop)
contact = PeerNode(PUBLIC_KEY, self.version,
'netstring://192.168.0.1:1908')
msg = OK('uuid', 'recipient', 'sender', 9999, 'version', 'seal')
protocol = mock.MagicMock()
def side_effect(*args, **kwargs):
raise ValueError()
protocol.send_string = mock.MagicMock(side_effect=side_effect)
sender = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
@asyncio.coroutine
def faux_connect(protocol=protocol):
return ('foo', protocol)
with mock.patch.object(self.event_loop, 'create_connection',
return_value=faux_connect()):
result = nc.send(contact, msg, sender)
with self.assertRaises(ValueError) as ex:
self.event_loop.run_until_complete(result)
self.assertEqual(1, protocol.send_string.call_count)
self.assertTrue(result.done())
self.assertEqual(ex.exception, result.exception())
self.assertNotIn(contact.network_id, nc._connections)
def test_receive_valid_json_invalid_message(self):
"""
If a message is received that consists of valid json but a malformed
message then log the incident for later analysis.
"""
patcher = mock.patch('drogulus.net.netstring.log.error')
nc = NetstringConnector(self.event_loop)
ping = {
'uuid': str(uuid.uuid4()),
'recipient': PUBLIC_KEY,
'sender': BAD_PUBLIC_KEY,
'reply_port': 1908,
'version': self.version,
}
seal = get_seal(ping, PRIVATE_KEY)
ping['seal'] = seal
ping['message'] = 'ping'
raw = json.dumps(ping)
sender = '192.168.0.1'
handler = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
protocol = mock.MagicMock()
mock_log = patcher.start()
nc.receive(raw, sender, handler, protocol)
self.assertEqual(3, mock_log.call_count)
patcher.stop()
def test_receive_valid_json_valid_message_from_old_peer(self):
"""
A good message is received then the node handles the message as
expected. The cached protocol object for the peer node is expired since
a new protocol object is used in this instance.
"""
nc = NetstringConnector(self.event_loop)
old_protocol = mock.MagicMock()
network_id = sha512(PUBLIC_KEY.encode('ascii')).hexdigest()
nc._connections[network_id] = old_protocol
ok = {
'uuid': str(uuid.uuid4()),
'recipient': PUBLIC_KEY,
'sender': PUBLIC_KEY,
'reply_port': 1908,
'version': self.version,
}
seal = get_seal(ok, PRIVATE_KEY)
ok['seal'] = seal
ok['message'] = 'ok'
raw = json.dumps(ok)
sender = '192.168.0.1'
handler = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
handler.message_received = mock.MagicMock()
protocol = mock.MagicMock()
nc.receive(raw, sender, handler, protocol)
self.assertIn(network_id, nc._connections)
self.assertEqual(nc._connections[network_id], protocol)
msg = from_dict(ok)
handler.message_received.assert_called_once_with(msg, 'netstring',
sender,
msg.reply_port)
def test_send_to_new_contact_successful_connection(self):
"""
Send a message to a new contact causes a new connection to be made
whose associated protocol object is cached for later use.
"""
nc = NetstringConnector(self.event_loop)
contact = PeerNode(PUBLIC_KEY, self.version,
'netstring://192.168.0.1:1908')
msg = OK('uuid', 'recipient', 'sender', 9999, 'version', 'seal')
protocol = mock.MagicMock()
protocol.send_string = mock.MagicMock()
sender = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
@asyncio.coroutine
def faux_connect(protocol=protocol):
return ('foo', protocol)
with mock.patch.object(self.event_loop, 'create_connection',
return_value=faux_connect()):
result = nc.send(contact, msg, sender)
self.event_loop.run_until_complete(result)
self.assertEqual(1, protocol.send_string.call_count)
self.assertTrue(result.done())
self.assertEqual(True, result.result())
self.assertIn(contact.network_id, nc._connections)
self.assertEqual(nc._connections[contact.network_id], protocol)
expected = to_dict(msg)
actual = json.loads(protocol.send_string.call_args[0][0])
self.assertEqual(expected, actual)
def test_receive_invalid_json(self):
"""
If a message is received that contains bad json then log the incident
for later analysis.
"""
patcher = mock.patch('drogulus.net.netstring.log.error')
nc = NetstringConnector(self.event_loop)
sender = '192.168.0.1'
handler = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
protocol = mock.MagicMock()
raw = 'invalid JSON'
mock_log = patcher.start()
nc.receive(raw, sender, handler, protocol)
self.assertEqual(3, mock_log.call_count)
patcher.stop()
def test_init(self):
"""
Check the class instantiates as expected.
"""
nc = NetstringConnector(self.event_loop)
self.assertEqual(nc._connections, {})
self.assertEqual(nc.event_loop, self.event_loop)
def test_send_with_cached_protocol(self):
"""
Send the message to the referenced contact using a cached protocol
object.
"""
nc = NetstringConnector(self.event_loop)
nc._send_message_with_protocol = mock.MagicMock()
contact = PeerNode(PUBLIC_KEY, self.version,
'netstring://192.168.0.1:1908')
msg = OK('uuid', 'recipient', 'sender', 9999, 'version', 'seal')
protocol = mock.MagicMock()
sender = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
nc._connections[contact.network_id] = protocol
result = nc.send(contact, msg, sender)
self.assertIsInstance(result, asyncio.Future)
self.assertTrue(result.done())
self.assertEqual(result.result(), True)
nc._send_message_with_protocol.assert_called_once_with(msg, protocol)
def setUp(self):
"""
A whole bunch of generic stuff we regularly need to faff about with
that are set to some sane defaults.
"""
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
self.event_loop = asyncio.get_event_loop()
self.connector = NetstringConnector(self.event_loop)
self.version = get_version()
def test_send_message_with_protocol(self):
"""
Ensures that the message is translated into a dictionary and passed
into the protocol object in the expected way.
"""
nc = NetstringConnector(self.event_loop)
protocol = mock.MagicMock()
protocol.send_string = mock.MagicMock()
msg = OK('uuid', 'recipient', 'sender', 9999, 'version', 'seal')
nc._send_message_with_protocol(msg, protocol)
expected = {
'message': 'ok',
'uuid': 'uuid',
'recipient': 'recipient',
'sender': 'sender',
'reply_port': 9999,
'version': 'version',
'seal': 'seal'
}
actual = json.loads(protocol.send_string.call_args[0][0])
self.assertEqual(expected, actual)
def test_send_with_failing_cached_protocol(self):
"""
Attempting to send a message to the referenced contact using a
cached protocol object that cannot send (e.g. perhaps the transport
was dropped?) causes a retry as if the contact were new.
"""
nc = NetstringConnector(self.event_loop)
contact = PeerNode(PUBLIC_KEY, self.version,
'netstring://192.168.0.1:1908')
msg = OK('uuid', 'recipient', 'sender', 9999, 'version', 'seal')
protocol = mock.MagicMock()
def side_effect(*args, **kwargs):
raise ValueError()
protocol.send_string = mock.MagicMock(side_effect=side_effect)
nc._connections[contact.network_id] = protocol
new_protocol = mock.MagicMock()
new_protocol.send_string = mock.MagicMock()
sender = Node(PUBLIC_KEY, PRIVATE_KEY, self.event_loop, nc, 1908)
@asyncio.coroutine
def faux_connect(protocol=new_protocol):
return ('foo', protocol)
with mock.patch.object(self.event_loop, 'create_connection',
return_value=faux_connect()):
result = nc.send(contact, msg, sender)
self.event_loop.run_until_complete(result)
self.assertEqual(1, new_protocol.send_string.call_count)
self.assertTrue(result.done())
self.assertEqual(True, result.result())
self.assertIn(contact.network_id, nc._connections)
self.assertEqual(nc._connections[contact.network_id],
new_protocol)
expected = to_dict(msg)
actual = json.loads(protocol.send_string.call_args[0][0])
self.assertEqual(expected, actual)
def start_node(event_loop, port):
"""
Starts a local drogulus node using throw away keys, logging to the
referenced directory and listening on the referenced port.
Return the Process encapsulating this node.
"""
connector = NetstringConnector(event_loop)
private_key, public_key = get_keypair()
instance = Drogulus(private_key, public_key, event_loop, connector, port)
def protocol_factory(connector=connector, node=instance._node):
"""
Returns an appropriately configured NetstringProtocol object for
each connection.
"""
return lambda: NetstringProtocol(connector, node)
factory = protocol_factory()
setup_server = event_loop.create_server(factory, port=port)
event_loop.run_until_complete(setup_server)
return instance
