tests/test-check-interfaces.py

snapshot: extract parent chain computation

The final step of this series is to include chain related to "prev" in the
search. Before adding that code we do some simple code movement to clarify the
next diff.

# Test that certain objects conform to well-defined interfaces.

from __future__ import absolute_import, print_function

from mercurial import encoding
encoding.environ[b'HGREALINTERFACES'] = b'1'

import os
import subprocess
import sys

# Only run if tests are run in a repo
if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
                    'test-repo']):
    sys.exit(80)

from mercurial.thirdparty.zope import (
    interface as zi,
)
from mercurial.thirdparty.zope.interface import (
    verify as ziverify,
)
from mercurial import (
    changegroup,
    bundlerepo,
    filelog,
    httppeer,
    localrepo,
    manifest,
    pycompat,
    repository,
    revlog,
    sshpeer,
    statichttprepo,
    ui as uimod,
    unionrepo,
    vfs as vfsmod,
    wireprotoserver,
    wireprototypes,
    wireprotov1peer,
    wireprotov2server,
)

rootdir = pycompat.fsencode(
    os.path.normpath(os.path.join(os.path.dirname(__file__), '..')))

def checkzobject(o, allowextra=False):
    """Verify an object with a zope interface."""
    ifaces = zi.providedBy(o)
    if not ifaces:
        print('%r does not provide any zope interfaces' % o)
        return

    # Run zope.interface's built-in verification routine. This verifies that
    # everything that is supposed to be present is present.
    for iface in ifaces:
        ziverify.verifyObject(iface, o)

    if allowextra:
        return

    # Now verify that the object provides no extra public attributes that
    # aren't declared as part of interfaces.
    allowed = set()
    for iface in ifaces:
        allowed |= set(iface.names(all=True))

    public = {a for a in dir(o) if not a.startswith('_')}

    for attr in sorted(public - allowed):
        print('public attribute not declared in interfaces: %s.%s' % (
            o.__class__.__name__, attr))

# Facilitates testing localpeer.
class dummyrepo(object):
    def __init__(self):
        self.ui = uimod.ui()
    def filtered(self, name):
        pass
    def _restrictcapabilities(self, caps):
        pass

class dummyopener(object):
    handlers = []

# Facilitates testing sshpeer without requiring a server.
class badpeer(httppeer.httppeer):
    def __init__(self):
        super(badpeer, self).__init__(None, None, None, dummyopener(), None,
                                      None)
        self.badattribute = True

    def badmethod(self):
        pass

class dummypipe(object):
    def close(self):
        pass

def main():
    ui = uimod.ui()
    # Needed so we can open a local repo with obsstore without a warning.
    ui.setconfig('experimental', 'evolution.createmarkers', True)

    checkzobject(badpeer())

    ziverify.verifyClass(repository.ipeerbase, httppeer.httppeer)
    checkzobject(httppeer.httppeer(None, None, None, dummyopener(), None, None))

    ziverify.verifyClass(repository.ipeerconnection,
                         httppeer.httpv2peer)
    ziverify.verifyClass(repository.ipeercapabilities,
                         httppeer.httpv2peer)
    checkzobject(httppeer.httpv2peer(None, b'', b'', None, None, None))

    ziverify.verifyClass(repository.ipeerbase,
                         localrepo.localpeer)
    checkzobject(localrepo.localpeer(dummyrepo()))

    ziverify.verifyClass(repository.ipeercommandexecutor,
                         localrepo.localcommandexecutor)
    checkzobject(localrepo.localcommandexecutor(None))

    ziverify.verifyClass(repository.ipeercommandexecutor,
                         wireprotov1peer.peerexecutor)
    checkzobject(wireprotov1peer.peerexecutor(None))

    ziverify.verifyClass(repository.ipeerbase, sshpeer.sshv1peer)
    checkzobject(sshpeer.sshv1peer(ui, b'ssh://localhost/foo', b'', dummypipe(),
                                   dummypipe(), None, None))

    ziverify.verifyClass(repository.ipeerbase, sshpeer.sshv2peer)
    checkzobject(sshpeer.sshv2peer(ui, b'ssh://localhost/foo', b'', dummypipe(),
                                   dummypipe(), None, None))

    ziverify.verifyClass(repository.ipeerbase, bundlerepo.bundlepeer)
    checkzobject(bundlerepo.bundlepeer(dummyrepo()))

    ziverify.verifyClass(repository.ipeerbase, statichttprepo.statichttppeer)
    checkzobject(statichttprepo.statichttppeer(dummyrepo()))

    ziverify.verifyClass(repository.ipeerbase, unionrepo.unionpeer)
    checkzobject(unionrepo.unionpeer(dummyrepo()))

    ziverify.verifyClass(repository.completelocalrepository,
                         localrepo.localrepository)
    repo = localrepo.localrepository(ui, rootdir)
    checkzobject(repo)

    ziverify.verifyClass(wireprototypes.baseprotocolhandler,
                         wireprotoserver.sshv1protocolhandler)
    ziverify.verifyClass(wireprototypes.baseprotocolhandler,
                         wireprotoserver.sshv2protocolhandler)
    ziverify.verifyClass(wireprototypes.baseprotocolhandler,
                         wireprotoserver.httpv1protocolhandler)
    ziverify.verifyClass(wireprototypes.baseprotocolhandler,
                         wireprotov2server.httpv2protocolhandler)

    sshv1 = wireprotoserver.sshv1protocolhandler(None, None, None)
    checkzobject(sshv1)
    sshv2 = wireprotoserver.sshv2protocolhandler(None, None, None)
    checkzobject(sshv2)

    httpv1 = wireprotoserver.httpv1protocolhandler(None, None, None)
    checkzobject(httpv1)
    httpv2 = wireprotov2server.httpv2protocolhandler(None, None)
    checkzobject(httpv2)

    ziverify.verifyClass(repository.ifilestorage, filelog.filelog)
    ziverify.verifyClass(repository.imanifestdict, manifest.manifestdict)
    ziverify.verifyClass(repository.imanifestrevisionstored,
                         manifest.manifestctx)
    ziverify.verifyClass(repository.imanifestrevisionwritable,
                         manifest.memmanifestctx)
    ziverify.verifyClass(repository.imanifestrevisionstored,
                         manifest.treemanifestctx)
    ziverify.verifyClass(repository.imanifestrevisionwritable,
                         manifest.memtreemanifestctx)
    ziverify.verifyClass(repository.imanifestlog, manifest.manifestlog)
    ziverify.verifyClass(repository.imanifeststorage, manifest.manifestrevlog)

    vfs = vfsmod.vfs(b'.')
    fl = filelog.filelog(vfs, b'dummy.i')
    checkzobject(fl, allowextra=True)

    # Conforms to imanifestlog.
    ml = manifest.manifestlog(vfs, repo)
    checkzobject(ml)
    checkzobject(repo.manifestlog)

    # Conforms to imanifestrevision.
    mctx = ml[repo[0].manifestnode()]
    checkzobject(mctx)

    # Conforms to imanifestrevisionwritable.
    checkzobject(mctx.new())
    checkzobject(mctx.copy())

    # Conforms to imanifestdict.
    checkzobject(mctx.read())

    mrl = manifest.manifestrevlog(vfs)
    checkzobject(mrl)

    ziverify.verifyClass(repository.irevisiondelta,
                         revlog.revlogrevisiondelta)
    ziverify.verifyClass(repository.irevisiondeltarequest,
                         changegroup.revisiondeltarequest)

    rd = revlog.revlogrevisiondelta(
        node=b'',
        p1node=b'',
        p2node=b'',
        basenode=b'',
        linknode=b'',
        flags=b'',
        baserevisionsize=None,
        revision=b'',
        delta=None)
    checkzobject(rd)

    rdr = changegroup.revisiondeltarequest(
        node=b'',
        linknode=b'',
        p1node=b'',
        p2node=b'',
        basenode=b'')
    checkzobject(rdr)

main()