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cara_pseud_test.py
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cara_pseud_test.py
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import collections
from unittest import mock
import tornado.testing
import pseud
import pytest
import zmq
import cara
from cara import cara_pseud
from tests.cara_pseud_test_capnp import (
FooIface, BarIface, BazIface, ThreeIface, Super, Inherit, InheritAcceptor)
@pytest.fixture
def stream_mock(request):
# Don't let pseud make any real contexts.
patch = mock.patch.object(zmq.Context, 'instance')
mock_context = patch.start()
request.addfinalizer(patch.stop)
# Create a new mock socket so the binds and connects don't combine.
def create_socket(sock_type):
socket = mock.MagicMock()
socket.mechanism = zmq.PLAIN
return socket
mock_context.return_value.socket.side_effect = create_socket
# Return a stream mock that sends packets to the other stream.
patch = mock.patch.object(
zmq.eventloop.zmqstream, 'ZMQStream')
stream_mock = patch.start()
request.addfinalizer(patch.stop)
# endpoint -> stream
stream_mock.servers = servers = {}
# endpoint -> routing_id -> stream
stream_mock.clients = clients = collections.defaultdict(dict)
stream_mock.packets = packets = []
streams = {}
def create_stream(socket, io_loop):
stream = mock.MagicMock()
stream.socket = socket
is_server = False
endpoint = None
def send_effect(data):
if not is_server:
clients[endpoint][stream.socket.plain_username] = stream
# Send data to the _other_ stream.
if is_server:
# Server uses the ROUTER's routing id (which we set).
other_stream = clients[endpoint][data[0]]
else:
other_stream = servers[endpoint]
if not is_server:
# Act like a ROUTER socket and set our username as the
# routing id.
data[0] = stream.socket.plain_username
packets.append((streams[stream], streams[other_stream], data))
data = [zmq.Frame(frame) for frame in data]
call = other_stream.on_recv.mock_calls[0]
name, args, kwargs = call
on_recv_cb = args[0]
with mock.patch.object(data[-1], 'get'):
# Have to make the User-Id return our username.
if not is_server or True:
username = stream.socket.plain_username
if isinstance(username, (bytes, str)):
data[-1].get.return_value = username.decode('utf-8')
on_recv_cb(data)
# Get the last endpoint the socket was bound to.
for (name, args, kwargs) in reversed(socket.mock_calls):
if name == 'bind':
endpoint = args[0]
is_server = True
break
if name == 'connect':
endpoint = args[0]
break
if is_server:
servers[endpoint] = stream
streams[stream] = socket.identity
stream.send_multipart.side_effect = send_effect
else:
# routing id unknown until first send for clients.
streams[stream] = stream.socket.plain_username
stream.send_multipart.side_effect = send_effect
return stream
stream_mock.side_effect = create_stream
# Make the stream mock available on the class.
request.cls.stream_mock = stream_mock
return stream_mock
class BasePseudTest(tornado.testing.AsyncTestCase):
def create_server(self, endpoint):
server = pseud.Server(
b'server', io_loop=self.io_loop, security_plugin='trusted_peer')
server.bind(endpoint)
return cara_pseud.setup_server(server)
def create_client(self, endpoint, user_id=b'client'):
client = pseud.Client(
b'server', io_loop=self.io_loop,
security_plugin='plain', user_id=user_id, password=b'_')
client.connect(endpoint)
return cara_pseud.setup_client(client)
@pytest.mark.usefixtures('stream_mock')
class PseudTest(BasePseudTest):
def create_client_server(self):
endpoint = b'ipc://pseud-test-ipc'
self.server = self.create_server(endpoint)
self.client = self.create_client(endpoint)
starts = [self.server.start(), self.client.start()]
self.server_stream = self.server.reader
self.client_stream = self.client.reader
return starts
@tornado.testing.gen_test(timeout=0.1)
def test_simple(self):
this = self
yield self.create_client_server()
@self.server.register_rpc
def test():
self.stop(True)
@cara_pseud.register_interface(self.server)
class BazIfaceImpl(BazIface):
def call(self, is_called):
this.stop(True)
yield self.client.test()
assert self.wait()
yield BazIface(self.client).call(True)
assert self.wait()
@tornado.testing.gen_test(timeout=0.1)
def test_call_client_cb(self):
this = self
yield self.create_client_server()
class Foo(FooIface):
def callback(self):
this.stop(True)
@cara_pseud.register_interface(self.server, FooIface)
def calls_cb(foo):
foo.callback()
yield self.client.callback(Foo())
assert self.wait()
@tornado.testing.gen_test(timeout=0.1)
def test_call_server_cb(self):
yield self.create_client_server()
@cara_pseud.register_interface(self.server, BarIface)
def returnCb():
def cb(is_called):
self.stop(is_called)
return cb
cb = yield BarIface(self.client).returnCb()
yield cb.call(True)
assert self.wait()
@tornado.testing.gen_test(timeout=0.1)
def test_inheritance(self):
yield self.create_client_server()
inherit_iface = {
'superMethod': lambda: self.stop('super'),
'inheritedMethod': lambda: self.stop('inherited'),
'second': lambda: self.stop('second'),
'third': lambda: self.stop('third'),
'overlapped': lambda: self.stop('overlapped'),
}
cara_pseud.register_interface(self.server, Inherit, inherit_iface)
yield Inherit(self.client).inheritedMethod()
assert self.wait() == 'inherited'
yield Inherit(self.client).superMethod()
assert self.wait() == 'super'
cara_pseud.register_interface(self.server, InheritAcceptor, {
'accept': lambda iface: self.stop(iface)
})
yield InheritAcceptor(self.client).accept(inherit_iface)
accepted = self.wait()
assert isinstance(accepted, cara_pseud.RemoteInterfaceClient)
yield accepted.superMethod()
assert self.wait() == 'super'
yield accepted.superMethod()
assert self.wait() == 'super'
yield accepted.inheritedMethod()
assert self.wait() == 'inherited'
@pytest.mark.usefixtures('stream_mock')
class ProxyTest(BasePseudTest):
class ThreeIfaceImpl(ThreeIface):
def __init__(self):
self._last = None
def returnIface(self):
return self._last
def acceptIface(self, accept):
self._last = accept
@tornado.testing.gen_test(timeout=0.1)
def test_three_parties(self):
# Test three parties, A, B, and C. B sends an interface to A, then C
# gets that interface from B. Calling a method on that interface on C
# should proxy through A to B.
# interface goes B -> A -> C
server_a = self.create_server('ipc://party')
client_b = self.create_client('ipc://party', user_id=b'client-b')
client_c = self.create_client('ipc://party', user_id=b'client-c')
cara_pseud.register_interface(
server_a, ThreeIface, self.ThreeIfaceImpl())
yield [server_a.start(), client_b.start(), client_c.start()]
client_b = ThreeIface(client_b)
client_c = ThreeIface(client_c)
# B -> A
yield client_b.acceptIface({'normalMethod': lambda input: 'output'})
# C <- A
iface_from_b = yield client_c.returnIface()
# Call the interface from B through C.
result = yield iface_from_b.normalMethod('input')
assert result == 'output'
expected = [
# B -> A
(b'client-b', b'server'),
(b'server', b'client-b'),
# C <- A
(b'client-c', b'server'),
(b'server', b'client-c'),
# Call interface from B through C.
(b'client-c', b'server'), # C -> A
(b'server', b'client-b'), # A -> B
(b'client-b', b'server'), # A <- B
(b'server', b'client-c'), # C <- A
]
for (expected_sender, expected_recv), (sender, recv, _) in zip(
expected, self.stream_mock.packets):
assert expected_sender == sender
assert expected_recv == recv
@tornado.testing.gen_test(timeout=0.1)
def test_back_forth(self):
server = self.create_server('ipc://date')
client = self.create_client('ipc://date')
cara_pseud.register_interface(server, ThreeIface, self.ThreeIfaceImpl)
yield [server.start(), client.start()]
client = ThreeIface(client)
# Send interface.
yield client.acceptIface({'normalMethod': lambda input: 'out'})
# Get it back.
mine = yield client.returnIface()
# Should proxy through the server to ourselves.
result = yield mine.normalMethod('in')
assert result == 'out'
expected = [
# Send interface.
(b'client', b'server'),
(b'server', b'client'),
# Get it back
(b'client', b'server'),
(b'server', b'client'),
# Call the interface
(b'client', b'server'),
(b'server', b'client'),
# Proxied through us.
(b'client', b'server'),
(b'server', b'client'),
]
for (expected_sender, expected_recv), (sender, recv, _) in zip(
expected, self.stream_mock.packets):
assert expected_sender == sender
assert expected_recv == recv