view tests/test-wireproto-framing.py @ 42050:03f6480bfdda

unshelve: disable unshelve during merge (issue5123)

As stated in the issue5123, unshelve can destroy the second parent of
the context when tried to unshelve with an uncommitted merge. This
patch makes unshelve to abort when called with an uncommitted merge.

See how shelve.mergefiles works. Commit structure looks like this:
```
... -> pctx -> tmpwctx -> shelvectx
                  /
                 /
        second
        merge parent

pctx = parent before merging working context(first merge parent)
tmpwctx = commited working directory after merge(with two parents)
shelvectx = shelved context
```
shelve.mergefiles first updates to pctx then it reverts shelvectx to pctx with:

```
cmdutil.revert(ui, repo, shelvectx, repo.dirstate.parents(),
                       *pathtofiles(repo, files),
                       **{'no_backup': True})
```

Reverting tmpwctx files that were merged from second parent to pctx makes them
added because they are not in pctx.

Changing this revert operation is crucial to restore parents after unshelve.
This is a complicated issue as this is not fixing a regression. Thus, for the
time being, unshelve during an uncommitted merge can be aborted.

(Details taken from http://mercurial.808500.n3.nabble.com/PATCH-V3-shelve-restore-parents-after-unshelve-issue5123-tt4036858.html#a4037408)

Differential Revision: https://phab.mercurial-scm.org/D6169

from __future__ import absolute_import, print_function

import unittest

from mercurial import (
    util,
    wireprotoframing as framing,
)

ffs = framing.makeframefromhumanstring

class FrameHumanStringTests(unittest.TestCase):
    def testbasic(self):
        self.assertEqual(ffs(b'1 1 0 1 0 '),
                         b'\x00\x00\x00\x01\x00\x01\x00\x10')

        self.assertEqual(ffs(b'2 4 0 1 0 '),
                         b'\x00\x00\x00\x02\x00\x04\x00\x10')

        self.assertEqual(ffs(b'2 4 0 1 0 foo'),
                         b'\x03\x00\x00\x02\x00\x04\x00\x10foo')

    def testcborint(self):
        self.assertEqual(ffs(b'1 1 0 1 0 cbor:15'),
                         b'\x01\x00\x00\x01\x00\x01\x00\x10\x0f')

        self.assertEqual(ffs(b'1 1 0 1 0 cbor:42'),
                         b'\x02\x00\x00\x01\x00\x01\x00\x10\x18*')

        self.assertEqual(ffs(b'1 1 0 1 0 cbor:1048576'),
                         b'\x05\x00\x00\x01\x00\x01\x00\x10\x1a'
                         b'\x00\x10\x00\x00')

        self.assertEqual(ffs(b'1 1 0 1 0 cbor:0'),
                         b'\x01\x00\x00\x01\x00\x01\x00\x10\x00')

        self.assertEqual(ffs(b'1 1 0 1 0 cbor:-1'),
                         b'\x01\x00\x00\x01\x00\x01\x00\x10 ')

        self.assertEqual(ffs(b'1 1 0 1 0 cbor:-342542'),
                         b'\x05\x00\x00\x01\x00\x01\x00\x10:\x00\x05:\r')

    def testcborstrings(self):
        self.assertEqual(ffs(b"1 1 0 1 0 cbor:b'foo'"),
                         b'\x04\x00\x00\x01\x00\x01\x00\x10Cfoo')

    def testcborlists(self):
        self.assertEqual(ffs(b"1 1 0 1 0 cbor:[None, True, False, 42, b'foo']"),
                         b'\n\x00\x00\x01\x00\x01\x00\x10\x85\xf6\xf5\xf4'
                         b'\x18*Cfoo')

    def testcbordicts(self):
        self.assertEqual(ffs(b"1 1 0 1 0 "
                             b"cbor:{b'foo': b'val1', b'bar': b'val2'}"),
                         b'\x13\x00\x00\x01\x00\x01\x00\x10\xa2'
                         b'CbarDval2CfooDval1')

class FrameTests(unittest.TestCase):
    def testdataexactframesize(self):
        data = util.bytesio(b'x' * framing.DEFAULT_MAX_FRAME_SIZE)

        stream = framing.stream(1)
        frames = list(framing.createcommandframes(stream, 1, b'command',
                                                  {}, data))
        self.assertEqual(frames, [
            ffs(b'1 1 stream-begin command-request new|have-data '
                b"cbor:{b'name': b'command'}"),
            ffs(b'1 1 0 command-data continuation %s' % data.getvalue()),
            ffs(b'1 1 0 command-data eos ')
        ])

    def testdatamultipleframes(self):
        data = util.bytesio(b'x' * (framing.DEFAULT_MAX_FRAME_SIZE + 1))

        stream = framing.stream(1)
        frames = list(framing.createcommandframes(stream, 1, b'command', {},
                                                  data))
        self.assertEqual(frames, [
            ffs(b'1 1 stream-begin command-request new|have-data '
                b"cbor:{b'name': b'command'}"),
            ffs(b'1 1 0 command-data continuation %s' % (
                b'x' * framing.DEFAULT_MAX_FRAME_SIZE)),
            ffs(b'1 1 0 command-data eos x'),
        ])

    def testargsanddata(self):
        data = util.bytesio(b'x' * 100)

        stream = framing.stream(1)
        frames = list(framing.createcommandframes(stream, 1, b'command', {
            b'key1': b'key1value',
            b'key2': b'key2value',
            b'key3': b'key3value',
        }, data))

        self.assertEqual(frames, [
            ffs(b'1 1 stream-begin command-request new|have-data '
                b"cbor:{b'name': b'command', b'args': {b'key1': b'key1value', "
                b"b'key2': b'key2value', b'key3': b'key3value'}}"),
            ffs(b'1 1 0 command-data eos %s' % data.getvalue()),
        ])

    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 testtextoutputformattingstringtype(self):
        """Formatting string must be bytes."""
        with self.assertRaisesRegex(ValueError, 'must use bytes formatting '):
            list(framing.createtextoutputframe(None, 1, [
                (b'foo'.decode('ascii'), [], [])]))

    def testtextoutputargumentbytes(self):
        with self.assertRaisesRegex(ValueError, 'must use bytes for argument'):
            list(framing.createtextoutputframe(None, 1, [
                (b'foo', [b'foo'.decode('ascii')], [])]))

    def testtextoutputlabelbytes(self):
        with self.assertRaisesRegex(ValueError, 'must use bytes for labels'):
            list(framing.createtextoutputframe(None, 1, [
                (b'foo', [], [b'foo'.decode('ascii')])]))

    def testtextoutput1simpleatom(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo', [], [])]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo'}]"),
        ])

    def testtextoutput2simpleatoms(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo', [], []),
            (b'bar', [], []),
        ]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo'}, {b'msg': b'bar'}]")
        ])

    def testtextoutput1arg(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo %s', [b'val1'], []),
        ]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo %s', b'args': [b'val1']}]")
        ])

    def testtextoutput2arg(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo %s %s', [b'val', b'value'], []),
        ]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo %s %s', b'args': [b'val', b'value']}]")
        ])

    def testtextoutput1label(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo', [], [b'label']),
        ]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo', b'labels': [b'label']}]")
        ])

    def testargandlabel(self):
        stream = framing.stream(1)
        val = list(framing.createtextoutputframe(stream, 1, [
            (b'foo %s', [b'arg'], [b'label']),
        ]))

        self.assertEqual(val, [
            ffs(b'1 1 stream-begin text-output 0 '
                b"cbor:[{b'msg': b'foo %s', b'args': [b'arg'], "
                b"b'labels': [b'label']}]")
        ])

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