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#!/usr/bin/env python
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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 unittest
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import silenttestrunner
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from mercurial.node import sha1nodeconstants
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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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# 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 hgext.remotefilelog import (
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basepack,
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historypack,
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)
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class histpacktests(unittest.TestCase):
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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 = tempfile.mkdtemp()
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self.tempdirs.append(tempdir)
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return pycompat.fsencode(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):
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"""Creates and returns a historypack containing the specified revisions.
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`revisions` is a list of tuples, where each tuple contains a filanem,
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node, p1node, p2node, and linknode.
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"""
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if revisions is None:
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revisions = [
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(
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b"filename",
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self.getFakeHash(),
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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self.getFakeHash(),
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None,
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)
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]
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packdir = pycompat.fsencode(self.makeTempDir())
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packer = historypack.mutablehistorypack(uimod.ui(), packdir, version=2)
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for filename, node, p1, p2, linknode, copyfrom in revisions:
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packer.add(filename, node, p1, p2, linknode, copyfrom)
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path = packer.close()
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return historypack.historypack(path)
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def testAddSingle(self):
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"""Test putting a single entry into a pack and reading it out."""
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filename = b"foo"
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node = self.getFakeHash()
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p1 = self.getFakeHash()
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p2 = self.getFakeHash()
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linknode = self.getFakeHash()
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revisions = [(filename, node, p1, p2, linknode, None)]
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pack = self.createPack(revisions)
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actual = pack.getancestors(filename, node)[node]
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self.assertEqual(p1, actual[0])
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self.assertEqual(p2, actual[1])
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self.assertEqual(linknode, actual[2])
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def testAddMultiple(self):
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"""Test putting multiple unrelated revisions into a pack and reading
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them 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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node = self.getFakeHash()
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p1 = self.getFakeHash()
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p2 = self.getFakeHash()
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linknode = self.getFakeHash()
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revisions.append((filename, node, p1, p2, linknode, None))
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pack = self.createPack(revisions)
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for filename, node, p1, p2, linknode, copyfrom in revisions:
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actual = pack.getancestors(filename, node)[node]
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self.assertEqual(p1, actual[0])
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self.assertEqual(p2, actual[1])
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self.assertEqual(linknode, actual[2])
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self.assertEqual(copyfrom, actual[3])
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def testAddAncestorChain(self):
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"""Test putting multiple revisions in into a pack and read the ancestor
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chain.
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"""
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revisions = []
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filename = b"foo"
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lastnode = sha1nodeconstants.nullid
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for i in range(10):
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node = self.getFakeHash()
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revisions.append(
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(
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filename,
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node,
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lastnode,
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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None,
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)
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)
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lastnode = node
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# revisions must be added in topological order, newest first
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revisions = list(reversed(revisions))
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pack = self.createPack(revisions)
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# Test that the chain has all the entries
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ancestors = pack.getancestors(revisions[0][0], revisions[0][1])
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for filename, node, p1, p2, linknode, copyfrom in revisions:
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ap1, ap2, alinknode, acopyfrom = ancestors[node]
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self.assertEqual(ap1, p1)
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self.assertEqual(ap2, p2)
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self.assertEqual(alinknode, linknode)
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self.assertEqual(acopyfrom, copyfrom)
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def testPackMany(self):
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"""Pack many related and unrelated ancestors."""
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# Build a random pack file
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allentries = {}
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ancestorcounts = {}
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revisions = []
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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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entries = []
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p2 = sha1nodeconstants.nullid
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linknode = sha1nodeconstants.nullid
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for j in range(random.randint(1, 100)):
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node = self.getFakeHash()
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p1 = sha1nodeconstants.nullid
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if len(entries) > 0:
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p1 = entries[random.randint(0, len(entries) - 1)]
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entries.append(node)
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revisions.append((filename, node, p1, p2, linknode, None))
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allentries[(filename, node)] = (p1, p2, linknode)
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if p1 == sha1nodeconstants.nullid:
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ancestorcounts[(filename, node)] = 1
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else:
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newcount = ancestorcounts[(filename, p1)] + 1
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ancestorcounts[(filename, node)] = newcount
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# Must add file entries in reverse topological order
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revisions = list(reversed(revisions))
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pack = self.createPack(revisions)
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# Verify the pack contents
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for filename, node in allentries:
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ancestors = pack.getancestors(filename, node)
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self.assertEqual(ancestorcounts[(filename, node)], len(ancestors))
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for anode, (ap1, ap2, alinknode, copyfrom) in ancestors.items():
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ep1, ep2, elinknode = allentries[(filename, anode)]
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self.assertEqual(ap1, ep1)
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self.assertEqual(ap2, ep2)
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self.assertEqual(alinknode, elinknode)
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self.assertEqual(copyfrom, None)
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def testGetNodeInfo(self):
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revisions = []
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filename = b"foo"
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lastnode = sha1nodeconstants.nullid
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for i in range(10):
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node = self.getFakeHash()
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revisions.append(
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(
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filename,
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node,
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lastnode,
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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None,
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)
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)
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lastnode = node
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pack = self.createPack(revisions)
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# Test that getnodeinfo returns the expected results
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for filename, node, p1, p2, linknode, copyfrom in revisions:
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ap1, ap2, alinknode, acopyfrom = pack.getnodeinfo(filename, node)
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self.assertEqual(ap1, p1)
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self.assertEqual(ap2, p2)
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self.assertEqual(alinknode, linknode)
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self.assertEqual(acopyfrom, copyfrom)
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def testGetMissing(self):
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"""Test the getmissing() api."""
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revisions = []
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filename = b"foo"
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for i in range(10):
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node = self.getFakeHash()
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p1 = self.getFakeHash()
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p2 = self.getFakeHash()
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linknode = self.getFakeHash()
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revisions.append((filename, node, p1, p2, linknode, None))
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pack = self.createPack(revisions)
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missing = pack.getmissing([(filename, revisions[0][1])])
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self.assertFalse(missing)
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missing = pack.getmissing(
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[(filename, revisions[0][1]), (filename, 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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[(filename, revisions[0][1]), (filename, fakenode)]
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)
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self.assertEqual(missing, [(filename, fakenode)])
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# Test getmissing on a non-existant filename
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missing = pack.getmissing([(b"bar", fakenode)])
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self.assertEqual(missing, [(b"bar", 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(
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b'filename',
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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sha1nodeconstants.nullid,
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None,
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)
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self.assertTrue(False, "historypack.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'.histpack'
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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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historypack.historypack(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 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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total = basepack.SMALLFANOUTCUTOFF + 1
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revisions = []
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for i in range(total):
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filename = b"foo-%d" % i
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node = self.getFakeHash()
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p1 = self.getFakeHash()
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p2 = self.getFakeHash()
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linknode = self.getFakeHash()
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revisions.append((filename, node, p1, p2, linknode, None))
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pack = self.createPack(revisions)
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self.assertEqual(pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX)
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for filename, node, p1, p2, linknode, copyfrom in revisions:
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actual = pack.getancestors(filename, node)[node]
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self.assertEqual(p1, actual[0])
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self.assertEqual(p2, actual[1])
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self.assertEqual(linknode, actual[2])
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self.assertEqual(copyfrom, actual[3])
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# TODO:
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# histpack store:
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# - repack two packs into one
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if __name__ == '__main__':
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if pycompat.iswindows:
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sys.exit(80) # Skip on Windows
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silenttestrunner.main(__name__)
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