Mercurial > hg
view tests/test-remotefilelog-datapack.py @ 49275:c6a3243567b6
chg: replace mercurial.util.recvfds() by simpler pure Python implementation
On Python 3, we have socket.socket.recvmsg(). This makes it possible to receive
FDs in pure Python code. The new code behaves like the previous
implementations, except that it’s more strict about the format of the ancillary
data. This works because we know in which format the FDs are passed.
Because the code is (and always has been) specific to chg (payload is 1 byte,
number of passed FDs is limited) and we now have only one implementation and
the code is very short, I decided to stop exposing a function in
mercurial.util.
Note on terminology: The SCM_RIGHTS mechanism is used to share open file
descriptions to another process over a socket. The sending side passes an array
of file descriptors and the receiving side receives an array of file
descriptors. The file descriptors are different in general on both sides but
refer to the same open file descriptions. The two terms are often conflated,
even in the official documentation. That’s why I used “FD” above, which could
mean both “file descriptor” and “file description”.
author | Manuel Jacob <me@manueljacob.de> |
---|---|
date | Thu, 02 Jun 2022 23:57:56 +0200 |
parents | 642e31cb55f0 |
children | d44e3c45f0e4 |
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#!/usr/bin/env python import hashlib import os import random import shutil import stat import struct import sys import tempfile import time import unittest import silenttestrunner # Load the local remotefilelog, not the system one sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')] from mercurial.node import sha1nodeconstants from mercurial import policy if not policy._packageprefs.get(policy.policy, (False, False))[1]: if __name__ == '__main__': msg = "skipped: pure module not available with module policy:" print(msg, policy.policy, file=sys.stderr) sys.exit(80) from mercurial import ( pycompat, ui as uimod, ) from hgext.remotefilelog import ( basepack, constants, datapack, ) class datapacktestsbase: def __init__(self, datapackreader, paramsavailable): self.datapackreader = datapackreader self.paramsavailable = paramsavailable def setUp(self): self.tempdirs = [] def tearDown(self): for d in self.tempdirs: shutil.rmtree(d) def makeTempDir(self): tempdir = pycompat.bytestr(tempfile.mkdtemp()) self.tempdirs.append(tempdir) return tempdir def getHash(self, content): return hashlib.sha1(content).digest() def getFakeHash(self): return b''.join( pycompat.bytechr(random.randint(0, 255)) for _ in range(20) ) def createPack(self, revisions=None, packdir=None): if revisions is None: revisions = [ ( b"filename", self.getFakeHash(), sha1nodeconstants.nullid, b"content", ) ] if packdir is None: packdir = self.makeTempDir() packer = datapack.mutabledatapack(uimod.ui(), packdir, version=2) for args in revisions: filename, node, base, content = args[0:4] # meta is optional meta = None if len(args) > 4: meta = args[4] packer.add(filename, node, base, content, metadata=meta) path = packer.close() return self.datapackreader(path) def _testAddSingle(self, content): """Test putting a simple blob into a pack and reading it out.""" filename = b"foo" node = self.getHash(content) revisions = [(filename, node, sha1nodeconstants.nullid, content)] pack = self.createPack(revisions) if self.paramsavailable: self.assertEqual( pack.params.fanoutprefix, basepack.SMALLFANOUTPREFIX ) chain = pack.getdeltachain(filename, node) self.assertEqual(content, chain[0][4]) def testAddSingle(self): self._testAddSingle(b'') def testAddSingleEmpty(self): self._testAddSingle(b'abcdef') def testAddMultiple(self): """Test putting multiple unrelated blobs into a pack and reading them out. """ revisions = [] for i in range(10): filename = b"foo%d" % i content = b"abcdef%d" % i node = self.getHash(content) revisions.append((filename, node, self.getFakeHash(), content)) pack = self.createPack(revisions) for filename, node, base, content in revisions: entry = pack.getdelta(filename, node) self.assertEqual((content, filename, base, {}), entry) chain = pack.getdeltachain(filename, node) self.assertEqual(content, chain[0][4]) def testAddDeltas(self): """Test putting multiple delta blobs into a pack and read the chain.""" revisions = [] filename = b"foo" lastnode = sha1nodeconstants.nullid for i in range(10): content = b"abcdef%d" % i node = self.getHash(content) revisions.append((filename, node, lastnode, content)) lastnode = node pack = self.createPack(revisions) entry = pack.getdelta(filename, revisions[0][1]) realvalue = (revisions[0][3], filename, revisions[0][2], {}) self.assertEqual(entry, realvalue) # Test that the chain for the final entry has all the others chain = pack.getdeltachain(filename, node) for i in range(10): content = b"abcdef%d" % i self.assertEqual(content, chain[-i - 1][4]) def testPackMany(self): """Pack many related and unrelated objects.""" # Build a random pack file revisions = [] blobs = {} random.seed(0) for i in range(100): filename = b"filename-%d" % i filerevs = [] for j in range(random.randint(1, 100)): content = b"content-%d" % j node = self.getHash(content) lastnode = sha1nodeconstants.nullid if len(filerevs) > 0: lastnode = filerevs[random.randint(0, len(filerevs) - 1)] filerevs.append(node) blobs[(filename, node, lastnode)] = content revisions.append((filename, node, lastnode, content)) pack = self.createPack(revisions) # Verify the pack contents for (filename, node, lastnode), content in sorted(blobs.items()): chain = pack.getdeltachain(filename, node) for entry in chain: expectedcontent = blobs[(entry[0], entry[1], entry[3])] self.assertEqual(entry[4], expectedcontent) def testPackMetadata(self): revisions = [] for i in range(100): filename = b'%d.txt' % i content = b'put-something-here \n' * i node = self.getHash(content) meta = { constants.METAKEYFLAG: i ** 4, constants.METAKEYSIZE: len(content), b'Z': b'random_string', b'_': b'\0' * i, } revisions.append( (filename, node, sha1nodeconstants.nullid, content, meta) ) pack = self.createPack(revisions) for name, node, x, content, origmeta in revisions: parsedmeta = pack.getmeta(name, node) # flag == 0 should be optimized out if origmeta[constants.METAKEYFLAG] == 0: del origmeta[constants.METAKEYFLAG] self.assertEqual(parsedmeta, origmeta) def testGetMissing(self): """Test the getmissing() api.""" revisions = [] filename = b"foo" lastnode = sha1nodeconstants.nullid for i in range(10): content = b"abcdef%d" % i node = self.getHash(content) revisions.append((filename, node, lastnode, content)) lastnode = node pack = self.createPack(revisions) missing = pack.getmissing([(b"foo", revisions[0][1])]) self.assertFalse(missing) missing = pack.getmissing( [(b"foo", revisions[0][1]), (b"foo", revisions[1][1])] ) self.assertFalse(missing) fakenode = self.getFakeHash() missing = pack.getmissing( [(b"foo", revisions[0][1]), (b"foo", fakenode)] ) self.assertEqual(missing, [(b"foo", fakenode)]) def testAddThrows(self): pack = self.createPack() try: pack.add(b'filename', sha1nodeconstants.nullid, b'contents') self.assertTrue(False, "datapack.add should throw") except RuntimeError: pass def testBadVersionThrows(self): pack = self.createPack() path = pack.path + b'.datapack' with open(path, 'rb') as f: raw = f.read() raw = struct.pack('!B', 255) + raw[1:] os.chmod(path, os.stat(path).st_mode | stat.S_IWRITE) with open(path, 'wb+') as f: f.write(raw) try: self.datapackreader(pack.path) self.assertTrue(False, "bad version number should have thrown") except RuntimeError: pass def testMissingDeltabase(self): fakenode = self.getFakeHash() revisions = [(b"filename", fakenode, self.getFakeHash(), b"content")] pack = self.createPack(revisions) chain = pack.getdeltachain(b"filename", fakenode) self.assertEqual(len(chain), 1) def testLargePack(self): """Test creating and reading from a large pack with over X entries. This causes it to use a 2^16 fanout table instead.""" revisions = [] blobs = {} total = basepack.SMALLFANOUTCUTOFF + 1 for i in pycompat.xrange(total): filename = b"filename-%d" % i content = filename node = self.getHash(content) blobs[(filename, node)] = content revisions.append( (filename, node, sha1nodeconstants.nullid, content) ) pack = self.createPack(revisions) if self.paramsavailable: self.assertEqual( pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX ) for (filename, node), content in blobs.items(): actualcontent = pack.getdeltachain(filename, node)[0][4] self.assertEqual(actualcontent, content) def testPacksCache(self): """Test that we remember the most recent packs while fetching the delta chain.""" packdir = self.makeTempDir() deltachains = [] numpacks = 10 revisionsperpack = 100 for i in range(numpacks): chain = [] revision = ( b'%d' % i, self.getFakeHash(), sha1nodeconstants.nullid, b"content", ) for _ in range(revisionsperpack): chain.append(revision) revision = ( b'%d' % i, self.getFakeHash(), revision[1], self.getFakeHash(), ) self.createPack(chain, packdir) deltachains.append(chain) class testdatapackstore(datapack.datapackstore): # Ensures that we are not keeping everything in the cache. DEFAULTCACHESIZE = numpacks // 2 store = testdatapackstore(uimod.ui(), packdir) random.shuffle(deltachains) for randomchain in deltachains: revision = random.choice(randomchain) chain = store.getdeltachain(revision[0], revision[1]) mostrecentpack = next(iter(store.packs), None) self.assertEqual( mostrecentpack.getdeltachain(revision[0], revision[1]), chain ) self.assertEqual(randomchain.index(revision) + 1, len(chain)) # perf test off by default since it's slow def _testIndexPerf(self): random.seed(0) print("Multi-get perf test") packsizes = [ 100, 10000, 100000, 500000, 1000000, 3000000, ] lookupsizes = [ 10, 100, 1000, 10000, 100000, 1000000, ] for packsize in packsizes: revisions = [] for i in pycompat.xrange(packsize): filename = b"filename-%d" % i content = b"content-%d" % i node = self.getHash(content) revisions.append( (filename, node, sha1nodeconstants.nullid, content) ) path = self.createPack(revisions).path # Perf of large multi-get import gc gc.disable() pack = self.datapackreader(path) for lookupsize in lookupsizes: if lookupsize > packsize: continue random.shuffle(revisions) findnodes = [(rev[0], rev[1]) for rev in revisions] start = time.time() pack.getmissing(findnodes[:lookupsize]) elapsed = time.time() - start print( "%s pack %d lookups = %0.04f" % ( ('%d' % packsize).rjust(7), ('%d' % lookupsize).rjust(7), elapsed, ) ) print("") gc.enable() # The perf test is meant to produce output, so we always fail the test # so the user sees the output. raise RuntimeError("perf test always fails") class datapacktests(datapacktestsbase, unittest.TestCase): def __init__(self, *args, **kwargs): datapacktestsbase.__init__(self, datapack.datapack, True) unittest.TestCase.__init__(self, *args, **kwargs) # TODO: # datapack store: # - getmissing # - GC two packs into one if __name__ == '__main__': if pycompat.iswindows: sys.exit(80) # Skip on Windows silenttestrunner.main(__name__)