wireprotov2: handle stream encoding settings frames
Like what we just did for the server reactor, we teach the client
reactor to handle stream encoding settings frames. The code is
very similar.
We define a method on the stream class to handle processing the data
within the decoded frames. However, it doesn't yet do anything useful.
Differential Revision: https://phab.mercurial-scm.org/D4918
from __future__ import absolute_import
import unittest
from mercurial import (
error,
wireprotoframing as framing,
)
from mercurial.utils import (
cborutil,
)
ffs = framing.makeframefromhumanstring
def sendframe(reactor, frame):
"""Send a frame bytearray to a reactor."""
header = framing.parseheader(frame)
payload = frame[framing.FRAME_HEADER_SIZE:]
assert len(payload) == header.length
return reactor.onframerecv(framing.frame(header.requestid,
header.streamid,
header.streamflags,
header.typeid,
header.flags,
payload))
class SingleSendTests(unittest.TestCase):
"""A reactor that can only send once rejects subsequent sends."""
if not getattr(unittest.TestCase, 'assertRaisesRegex', False):
# Python 3.7 deprecates the regex*p* version, but 2.7 lacks
# the regex version.
assertRaisesRegex = (# camelcase-required
unittest.TestCase.assertRaisesRegexp)
def testbasic(self):
reactor = framing.clientreactor(hasmultiplesend=False, buffersends=True)
request, action, meta = reactor.callcommand(b'foo', {})
self.assertEqual(request.state, b'pending')
self.assertEqual(action, b'noop')
action, meta = reactor.flushcommands()
self.assertEqual(action, b'sendframes')
for frame in meta[b'framegen']:
self.assertEqual(request.state, b'sending')
self.assertEqual(request.state, b'sent')
with self.assertRaisesRegex(error.ProgrammingError,
'cannot issue new commands'):
reactor.callcommand(b'foo', {})
with self.assertRaisesRegex(error.ProgrammingError,
'cannot issue new commands'):
reactor.callcommand(b'foo', {})
class NoBufferTests(unittest.TestCase):
"""A reactor without send buffering sends requests immediately."""
def testbasic(self):
reactor = framing.clientreactor(hasmultiplesend=True, buffersends=False)
request, action, meta = reactor.callcommand(b'command1', {})
self.assertEqual(request.requestid, 1)
self.assertEqual(action, b'sendframes')
self.assertEqual(request.state, b'pending')
for frame in meta[b'framegen']:
self.assertEqual(request.state, b'sending')
self.assertEqual(request.state, b'sent')
action, meta = reactor.flushcommands()
self.assertEqual(action, b'noop')
# And we can send another command.
request, action, meta = reactor.callcommand(b'command2', {})
self.assertEqual(request.requestid, 3)
self.assertEqual(action, b'sendframes')
for frame in meta[b'framegen']:
self.assertEqual(request.state, b'sending')
self.assertEqual(request.state, b'sent')
class BadFrameRecvTests(unittest.TestCase):
if not getattr(unittest.TestCase, 'assertRaisesRegex', False):
# Python 3.7 deprecates the regex*p* version, but 2.7 lacks
# the regex version.
assertRaisesRegex = (# camelcase-required
unittest.TestCase.assertRaisesRegexp)
def testoddstream(self):
reactor = framing.clientreactor()
action, meta = sendframe(reactor, ffs(b'1 1 0 1 0 foo'))
self.assertEqual(action, b'error')
self.assertEqual(meta[b'message'],
b'received frame with odd numbered stream ID: 1')
def testunknownstream(self):
reactor = framing.clientreactor()
action, meta = sendframe(reactor, ffs(b'1 0 0 1 0 foo'))
self.assertEqual(action, b'error')
self.assertEqual(meta[b'message'],
b'received frame on unknown stream without beginning '
b'of stream flag set')
def testunhandledframetype(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for frame in meta[b'framegen']:
pass
with self.assertRaisesRegex(error.ProgrammingError,
'unhandled frame type'):
sendframe(reactor, ffs(b'1 0 stream-begin text-output 0 foo'))
class StreamTests(unittest.TestCase):
def testmultipleresponseframes(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
self.assertEqual(action, b'sendframes')
for f in meta[b'framegen']:
pass
action, meta = sendframe(
reactor,
ffs(b'%d 0 stream-begin command-response 0 foo' %
request.requestid))
self.assertEqual(action, b'responsedata')
action, meta = sendframe(
reactor,
ffs(b'%d 0 0 command-response eos bar' % request.requestid))
self.assertEqual(action, b'responsedata')
class RedirectTests(unittest.TestCase):
def testredirect(self):
reactor = framing.clientreactor(buffersends=False)
redirect = {
b'targets': [b'a', b'b'],
b'hashes': [b'sha256'],
}
request, action, meta = reactor.callcommand(
b'foo', {}, redirect=redirect)
self.assertEqual(action, b'sendframes')
frames = list(meta[b'framegen'])
self.assertEqual(len(frames), 1)
self.assertEqual(frames[0],
ffs(b'1 1 stream-begin command-request new '
b"cbor:{b'name': b'foo', "
b"b'redirect': {b'targets': [b'a', b'b'], "
b"b'hashes': [b'sha256']}}"))
class StreamSettingsTests(unittest.TestCase):
def testnoflags(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings 0 '))
self.assertEqual(action, b'error')
self.assertEqual(meta, {
b'message': b'stream encoding settings frame must have '
b'continuation or end of stream flag set',
})
def testconflictflags(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings continuation|eos '))
self.assertEqual(action, b'error')
self.assertEqual(meta, {
b'message': b'stream encoding settings frame cannot have both '
b'continuation and end of stream flags set',
})
def testemptypayload(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings eos '))
self.assertEqual(action, b'error')
self.assertEqual(meta, {
b'message': b'stream encoding settings frame did not contain '
b'CBOR data'
})
def testbadcbor(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings eos badvalue'))
self.assertEqual(action, b'error')
def testsingleobject(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings eos cbor:b"identity"'))
self.assertEqual(action, b'noop')
self.assertEqual(meta, {})
def testmultipleobjects(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
data = b''.join([
b''.join(cborutil.streamencode(b'identity')),
b''.join(cborutil.streamencode({b'foo', b'bar'})),
])
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings eos %s' % data))
self.assertEqual(action, b'noop')
self.assertEqual(meta, {})
def testmultipleframes(self):
reactor = framing.clientreactor(buffersends=False)
request, action, meta = reactor.callcommand(b'foo', {})
for f in meta[b'framegen']:
pass
data = b''.join(cborutil.streamencode(b'identity'))
action, meta = sendframe(reactor,
ffs(b'1 2 stream-begin stream-settings continuation %s' %
data[0:3]))
self.assertEqual(action, b'noop')
self.assertEqual(meta, {})
action, meta = sendframe(reactor,
ffs(b'1 2 0 stream-settings eos %s' % data[3:]))
self.assertEqual(action, b'noop')
self.assertEqual(meta, {})
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)