tests/test-remotefilelog-datapack.py
author Matt Harbison <matt_harbison@yahoo.com>
Wed, 15 Jul 2020 14:06:12 -0400
changeset 45137 3ad0855cc602
parent 44432 dca4b5da417d
child 45830 c102b704edb5
permissions -rwxr-xr-x
phabupdate: allow revisions to be marked "closed" (Yes, the transaction name and final state in the comment here do differ.) Differential Revision: https://phab.mercurial-scm.org/D8753
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#!/usr/bin/env python
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from __future__ import absolute_import, print_function
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import hashlib
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import os
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import random
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import shutil
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import stat
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import struct
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import sys
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import tempfile
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import time
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import unittest
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import silenttestrunner
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# Load the local remotefilelog, not the system one
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sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')]
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from mercurial.node import nullid
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from mercurial import policy
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if not policy._packageprefs.get(policy.policy, (False, False))[1]:
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    if __name__ == '__main__':
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        msg = "skipped: pure module not available with module policy:"
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        print(msg, policy.policy, file=sys.stderr)
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        sys.exit(80)
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from mercurial import (
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    pycompat,
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    ui as uimod,
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)
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from hgext.remotefilelog import (
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    basepack,
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    constants,
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    datapack,
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)
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class datapacktestsbase(object):
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    def __init__(self, datapackreader, paramsavailable):
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        self.datapackreader = datapackreader
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        self.paramsavailable = paramsavailable
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    def setUp(self):
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        self.tempdirs = []
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    def tearDown(self):
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        for d in self.tempdirs:
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            shutil.rmtree(d)
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    def makeTempDir(self):
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        tempdir = pycompat.bytestr(tempfile.mkdtemp())
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        self.tempdirs.append(tempdir)
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        return tempdir
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    def getHash(self, content):
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        return hashlib.sha1(content).digest()
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    def getFakeHash(self):
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        return b''.join(
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            pycompat.bytechr(random.randint(0, 255)) for _ in range(20)
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        )
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    def createPack(self, revisions=None, packdir=None):
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        if revisions is None:
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            revisions = [(b"filename", self.getFakeHash(), nullid, b"content")]
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        if packdir is None:
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            packdir = self.makeTempDir()
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        packer = datapack.mutabledatapack(uimod.ui(), packdir, version=2)
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        for args in revisions:
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            filename, node, base, content = args[0:4]
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            # meta is optional
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            meta = None
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            if len(args) > 4:
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                meta = args[4]
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            packer.add(filename, node, base, content, metadata=meta)
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        path = packer.close()
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        return self.datapackreader(path)
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    def _testAddSingle(self, content):
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        """Test putting a simple blob into a pack and reading it out.
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        """
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        filename = b"foo"
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        node = self.getHash(content)
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        revisions = [(filename, node, nullid, content)]
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        pack = self.createPack(revisions)
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        if self.paramsavailable:
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            self.assertEqual(
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                pack.params.fanoutprefix, basepack.SMALLFANOUTPREFIX
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            )
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        chain = pack.getdeltachain(filename, node)
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        self.assertEqual(content, chain[0][4])
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    def testAddSingle(self):
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        self._testAddSingle(b'')
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    def testAddSingleEmpty(self):
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        self._testAddSingle(b'abcdef')
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    def testAddMultiple(self):
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        """Test putting multiple unrelated blobs into a pack and reading them
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        out.
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        """
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        revisions = []
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        for i in range(10):
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            filename = b"foo%d" % i
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            content = b"abcdef%d" % i
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            node = self.getHash(content)
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            revisions.append((filename, node, self.getFakeHash(), content))
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        pack = self.createPack(revisions)
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        for filename, node, base, content in revisions:
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            entry = pack.getdelta(filename, node)
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            self.assertEqual((content, filename, base, {}), entry)
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            chain = pack.getdeltachain(filename, node)
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            self.assertEqual(content, chain[0][4])
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    def testAddDeltas(self):
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        """Test putting multiple delta blobs into a pack and read the chain.
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        """
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        revisions = []
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        filename = b"foo"
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        lastnode = nullid
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        for i in range(10):
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            content = b"abcdef%d" % i
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            node = self.getHash(content)
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            revisions.append((filename, node, lastnode, content))
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            lastnode = node
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        pack = self.createPack(revisions)
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        entry = pack.getdelta(filename, revisions[0][1])
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        realvalue = (revisions[0][3], filename, revisions[0][2], {})
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        self.assertEqual(entry, realvalue)
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        # Test that the chain for the final entry has all the others
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        chain = pack.getdeltachain(filename, node)
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        for i in range(10):
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            content = b"abcdef%d" % i
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            self.assertEqual(content, chain[-i - 1][4])
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    def testPackMany(self):
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        """Pack many related and unrelated objects.
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        """
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        # Build a random pack file
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        revisions = []
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        blobs = {}
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        random.seed(0)
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        for i in range(100):
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            filename = b"filename-%d" % i
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            filerevs = []
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            for j in range(random.randint(1, 100)):
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                content = b"content-%d" % j
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                node = self.getHash(content)
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                lastnode = nullid
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                if len(filerevs) > 0:
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                    lastnode = filerevs[random.randint(0, len(filerevs) - 1)]
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                filerevs.append(node)
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                blobs[(filename, node, lastnode)] = content
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                revisions.append((filename, node, lastnode, content))
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        pack = self.createPack(revisions)
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        # Verify the pack contents
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        for (filename, node, lastnode), content in sorted(blobs.items()):
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            chain = pack.getdeltachain(filename, node)
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            for entry in chain:
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                expectedcontent = blobs[(entry[0], entry[1], entry[3])]
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                self.assertEqual(entry[4], expectedcontent)
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    def testPackMetadata(self):
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        revisions = []
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        for i in range(100):
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            filename = b'%d.txt' % i
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            content = b'put-something-here \n' * i
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            node = self.getHash(content)
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            meta = {
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                constants.METAKEYFLAG: i ** 4,
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                constants.METAKEYSIZE: len(content),
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                b'Z': b'random_string',
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                b'_': b'\0' * i,
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            }
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            revisions.append((filename, node, nullid, content, meta))
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        pack = self.createPack(revisions)
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        for name, node, x, content, origmeta in revisions:
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            parsedmeta = pack.getmeta(name, node)
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            # flag == 0 should be optimized out
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            if origmeta[constants.METAKEYFLAG] == 0:
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                del origmeta[constants.METAKEYFLAG]
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            self.assertEqual(parsedmeta, origmeta)
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    def testGetMissing(self):
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        """Test the getmissing() api.
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        """
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        revisions = []
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        filename = b"foo"
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        lastnode = nullid
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        for i in range(10):
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            content = b"abcdef%d" % i
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            node = self.getHash(content)
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            revisions.append((filename, node, lastnode, content))
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            lastnode = node
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        pack = self.createPack(revisions)
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        missing = pack.getmissing([(b"foo", revisions[0][1])])
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        self.assertFalse(missing)
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        missing = pack.getmissing(
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            [(b"foo", revisions[0][1]), (b"foo", revisions[1][1])]
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        )
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        self.assertFalse(missing)
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        fakenode = self.getFakeHash()
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        missing = pack.getmissing(
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            [(b"foo", revisions[0][1]), (b"foo", fakenode)]
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        )
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        self.assertEqual(missing, [(b"foo", fakenode)])
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    def testAddThrows(self):
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        pack = self.createPack()
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        try:
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            pack.add(b'filename', nullid, b'contents')
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            self.assertTrue(False, "datapack.add should throw")
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        except RuntimeError:
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            pass
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    def testBadVersionThrows(self):
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        pack = self.createPack()
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        path = pack.path + b'.datapack'
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        with open(path, 'rb') as f:
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            raw = f.read()
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        raw = struct.pack('!B', 255) + raw[1:]
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        os.chmod(path, os.stat(path).st_mode | stat.S_IWRITE)
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        with open(path, 'wb+') as f:
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            f.write(raw)
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        try:
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            self.datapackreader(pack.path)
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            self.assertTrue(False, "bad version number should have thrown")
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        except RuntimeError:
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            pass
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    def testMissingDeltabase(self):
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        fakenode = self.getFakeHash()
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        revisions = [(b"filename", fakenode, self.getFakeHash(), b"content")]
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        pack = self.createPack(revisions)
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        chain = pack.getdeltachain(b"filename", fakenode)
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        self.assertEqual(len(chain), 1)
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    def testLargePack(self):
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        """Test creating and reading from a large pack with over X entries.
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        This causes it to use a 2^16 fanout table instead."""
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        revisions = []
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        blobs = {}
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        total = basepack.SMALLFANOUTCUTOFF + 1
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        for i in pycompat.xrange(total):
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            filename = b"filename-%d" % i
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            content = filename
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            node = self.getHash(content)
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            blobs[(filename, node)] = content
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            revisions.append((filename, node, nullid, content))
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        pack = self.createPack(revisions)
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        if self.paramsavailable:
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            self.assertEqual(
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                pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX
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            )
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        for (filename, node), content in blobs.items():
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            actualcontent = pack.getdeltachain(filename, node)[0][4]
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            self.assertEqual(actualcontent, content)
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    def testPacksCache(self):
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        """Test that we remember the most recent packs while fetching the delta
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        chain."""
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        packdir = self.makeTempDir()
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        deltachains = []
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        numpacks = 10
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        revisionsperpack = 100
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        for i in range(numpacks):
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            chain = []
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            revision = (b'%d' % i, self.getFakeHash(), nullid, b"content")
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            for _ in range(revisionsperpack):
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                chain.append(revision)
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                revision = (
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                    b'%d' % i,
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                    self.getFakeHash(),
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                    revision[1],
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                    self.getFakeHash(),
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                )
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            self.createPack(chain, packdir)
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            deltachains.append(chain)
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        class testdatapackstore(datapack.datapackstore):
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            # Ensures that we are not keeping everything in the cache.
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            DEFAULTCACHESIZE = numpacks // 2
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        store = testdatapackstore(uimod.ui(), packdir)
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        random.shuffle(deltachains)
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        for randomchain in deltachains:
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            revision = random.choice(randomchain)
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            chain = store.getdeltachain(revision[0], revision[1])
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            mostrecentpack = next(iter(store.packs), None)
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            self.assertEqual(
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                mostrecentpack.getdeltachain(revision[0], revision[1]), chain
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            )
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   325
            self.assertEqual(randomchain.index(revision) + 1, len(chain))
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    # perf test off by default since it's slow
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    def _testIndexPerf(self):
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   329
        random.seed(0)
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        print("Multi-get perf test")
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   331
        packsizes = [
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            100,
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            10000,
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            100000,
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            500000,
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            1000000,
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            3000000,
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        ]
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   339
        lookupsizes = [
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            10,
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            100,
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            1000,
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            10000,
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            100000,
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            1000000,
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        ]
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        for packsize in packsizes:
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   348
            revisions = []
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            for i in pycompat.xrange(packsize):
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                filename = b"filename-%d" % i
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                content = b"content-%d" % i
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   352
                node = self.getHash(content)
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                revisions.append((filename, node, nullid, content))
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   354
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   355
            path = self.createPack(revisions).path
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   356
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            # Perf of large multi-get
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            import gc
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   359
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            gc.disable()
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   361
            pack = self.datapackreader(path)
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   362
            for lookupsize in lookupsizes:
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   363
                if lookupsize > packsize:
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   364
                    continue
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   365
                random.shuffle(revisions)
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   366
                findnodes = [(rev[0], rev[1]) for rev in revisions]
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   367
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   368
                start = time.time()
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   369
                pack.getmissing(findnodes[:lookupsize])
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   370
                elapsed = time.time() - start
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                print(
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                    "%s pack %d lookups = %0.04f"
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   373
                    % (
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   374
                        ('%d' % packsize).rjust(7),
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                        ('%d' % lookupsize).rjust(7),
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   376
                        elapsed,
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   377
                    )
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   378
                )
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   379
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   380
            print("")
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   381
            gc.enable()
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   382
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   383
        # The perf test is meant to produce output, so we always fail the test
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   384
        # so the user sees the output.
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   385
        raise RuntimeError("perf test always fails")
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   386
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   387
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   388
class datapacktests(datapacktestsbase, unittest.TestCase):
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   389
    def __init__(self, *args, **kwargs):
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   390
        datapacktestsbase.__init__(self, datapack.datapack, True)
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   391
        unittest.TestCase.__init__(self, *args, **kwargs)
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   392
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   393
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   394
# TODO:
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   395
# datapack store:
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   396
# - getmissing
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   397
# - GC two packs into one
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parents:
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   398
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   399
if __name__ == '__main__':
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   400
    if pycompat.iswindows:
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   401
        sys.exit(80)  # Skip on Windows
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   402
    silenttestrunner.main(__name__)