tests/test-wireproto-clientreactor.py

lfs: infer the blob store URL from an explicit push dest or default-push

Unlike pull, the blobs are uploaded within the exchange.push() window, so simply
wrap it and swap in a properly configured remote store.  The '_subtoppath' field
shouldn't be available during this window, but give the passed path priority for
clarity.

At one point I hit an AttributeError in one of the convert tests when trying to
save the original remote blobstore when the swap was run unconditionally.  I
wrapped it in a util.safehasattr(), but then today I wasn't able to reproduce
it.  But now the whole thing is tucked under the requirement guard because
without the requirement, there are no blobs in the repo, even if the extension
is loaded.

from __future__ import absolute_import

import unittest

from mercurial import (
    error,
    wireprotoframing as framing,
)

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."""
    def testbasic(self):
        reactor = framing.clientreactor(hasmultiplesend=False, buffersends=True)

        request, action, meta = reactor.callcommand(b'foo', {})
        self.assertEqual(request.state, 'pending')
        self.assertEqual(action, 'noop')

        action, meta = reactor.flushcommands()
        self.assertEqual(action, 'sendframes')

        for frame in meta['framegen']:
            self.assertEqual(request.state, 'sending')

        self.assertEqual(request.state, 'sent')

        with self.assertRaisesRegexp(error.ProgrammingError,
                                     'cannot issue new commands'):
            reactor.callcommand(b'foo', {})

        with self.assertRaisesRegexp(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, 'sendframes')

        self.assertEqual(request.state, 'pending')

        for frame in meta['framegen']:
            self.assertEqual(request.state, 'sending')

        self.assertEqual(request.state, 'sent')

        action, meta = reactor.flushcommands()
        self.assertEqual(action, 'noop')

        # And we can send another command.
        request, action, meta = reactor.callcommand(b'command2', {})
        self.assertEqual(request.requestid, 3)
        self.assertEqual(action, 'sendframes')

        for frame in meta['framegen']:
            self.assertEqual(request.state, 'sending')

        self.assertEqual(request.state, 'sent')

class BadFrameRecvTests(unittest.TestCase):
    def testoddstream(self):
        reactor = framing.clientreactor()

        action, meta = sendframe(reactor, ffs(b'1 1 0 1 0 foo'))
        self.assertEqual(action, 'error')
        self.assertEqual(meta['message'],
                         '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, 'error')
        self.assertEqual(meta['message'],
                         'received frame on unknown stream without beginning '
                         'of stream flag set')

    def testunhandledframetype(self):
        reactor = framing.clientreactor(buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})
        for frame in meta['framegen']:
            pass

        with self.assertRaisesRegexp(error.ProgrammingError,
                                     'unhandled frame type'):
            sendframe(reactor, ffs(b'1 0 stream-begin text-output 0 foo'))

if __name__ == '__main__':
    import silenttestrunner
    silenttestrunner.main(__name__)