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annotate tests/test-remotefilelog-histpack.py @ 40506:10c10da14c5d

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remotefilelog: bump pack file formats to version 2 Drop support for format 0 and 1 packs. Version 2 will be different in that it'll use zlib compression instead of lz4, as the latter isn't really suitable for core. If I can make it work, I'll make compression engines pluggable, but the logic for handling these files is spread out enough it's a little tricky to get that right. Test changes are only due to pack files being renamed. The contents of the packs are the same. Differential Revision: https://phab.mercurial-scm.org/D4943
author Augie Fackler <augie@google.com>
date Wed, 03 Oct 2018 23:25:31 -0400
parents 3a333a582d7b
children 9446d5aa0f32
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1 #!/usr/bin/env python
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2 from __future__ import absolute_import
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3
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4 import hashlib
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5 import os
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6 import random
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7 import shutil
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8 import stat
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9 import struct
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10 import sys
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11 import tempfile
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12 import unittest
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13
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14 import silenttestrunner
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15
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16 from mercurial.node import nullid
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17 from mercurial import (
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18 ui as uimod,
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19 )
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20 # Load the local remotefilelog, not the system one
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21 sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')]
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22 from hgext.remotefilelog import (
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23 basepack,
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24 historypack,
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25 )
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26
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27 class histpacktests(unittest.TestCase):
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28 def setUp(self):
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29 self.tempdirs = []
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30
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31 def tearDown(self):
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32 for d in self.tempdirs:
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33 shutil.rmtree(d)
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34
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35 def makeTempDir(self):
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36 tempdir = tempfile.mkdtemp()
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37 self.tempdirs.append(tempdir)
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38 return tempdir
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39
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40 def getHash(self, content):
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41 return hashlib.sha1(content).digest()
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42
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43 def getFakeHash(self):
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44 return ''.join(chr(random.randint(0, 255)) for _ in range(20))
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45
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46 def createPack(self, revisions=None):
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47 """Creates and returns a historypack containing the specified revisions.
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48
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49 `revisions` is a list of tuples, where each tuple contains a filanem,
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50 node, p1node, p2node, and linknode.
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51 """
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52 if revisions is None:
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53 revisions = [("filename", self.getFakeHash(), nullid, nullid,
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54 self.getFakeHash(), None)]
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55
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56 packdir = self.makeTempDir()
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57 packer = historypack.mutablehistorypack(uimod.ui(), packdir,
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58 version=2)
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59
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60 for filename, node, p1, p2, linknode, copyfrom in revisions:
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61 packer.add(filename, node, p1, p2, linknode, copyfrom)
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62
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63 path = packer.close()
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64 return historypack.historypack(path)
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65
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66 def testAddSingle(self):
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67 """Test putting a single entry into a pack and reading it out.
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68 """
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69 filename = "foo"
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70 node = self.getFakeHash()
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71 p1 = self.getFakeHash()
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72 p2 = self.getFakeHash()
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73 linknode = self.getFakeHash()
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74
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75 revisions = [(filename, node, p1, p2, linknode, None)]
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76 pack = self.createPack(revisions)
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77
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78 actual = pack.getancestors(filename, node)[node]
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79 self.assertEquals(p1, actual[0])
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80 self.assertEquals(p2, actual[1])
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81 self.assertEquals(linknode, actual[2])
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82
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83 def testAddMultiple(self):
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84 """Test putting multiple unrelated revisions into a pack and reading
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85 them out.
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86 """
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87 revisions = []
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88 for i in range(10):
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89 filename = "foo-%s" % i
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90 node = self.getFakeHash()
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91 p1 = self.getFakeHash()
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92 p2 = self.getFakeHash()
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93 linknode = self.getFakeHash()
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94 revisions.append((filename, node, p1, p2, linknode, None))
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95
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96 pack = self.createPack(revisions)
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97
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98 for filename, node, p1, p2, linknode, copyfrom in revisions:
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99 actual = pack.getancestors(filename, node)[node]
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100 self.assertEquals(p1, actual[0])
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101 self.assertEquals(p2, actual[1])
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102 self.assertEquals(linknode, actual[2])
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103 self.assertEquals(copyfrom, actual[3])
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104
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105 def testAddAncestorChain(self):
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106 """Test putting multiple revisions in into a pack and read the ancestor
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107 chain.
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108 """
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109 revisions = []
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110 filename = "foo"
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111 lastnode = nullid
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112 for i in range(10):
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113 node = self.getFakeHash()
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114 revisions.append((filename, node, lastnode, nullid, nullid, None))
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115 lastnode = node
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116
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117 # revisions must be added in topological order, newest first
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118 revisions = list(reversed(revisions))
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119 pack = self.createPack(revisions)
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120
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121 # Test that the chain has all the entries
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diff changeset
122 ancestors = pack.getancestors(revisions[0][0], revisions[0][1])
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diff changeset
123 for filename, node, p1, p2, linknode, copyfrom in revisions:
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diff changeset
124 ap1, ap2, alinknode, acopyfrom = ancestors[node]
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diff changeset
125 self.assertEquals(ap1, p1)
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diff changeset
126 self.assertEquals(ap2, p2)
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diff changeset
127 self.assertEquals(alinknode, linknode)
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diff changeset
128 self.assertEquals(acopyfrom, copyfrom)
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129
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130 def testPackMany(self):
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131 """Pack many related and unrelated ancestors.
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132 """
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133 # Build a random pack file
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134 allentries = {}
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135 ancestorcounts = {}
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136 revisions = []
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137 random.seed(0)
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diff changeset
138 for i in range(100):
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diff changeset
139 filename = "filename-%s" % i
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140 entries = []
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141 p2 = nullid
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diff changeset
142 linknode = nullid
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diff changeset
143 for j in range(random.randint(1, 100)):
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diff changeset
144 node = self.getFakeHash()
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145 p1 = nullid
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diff changeset
146 if len(entries) > 0:
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diff changeset
147 p1 = entries[random.randint(0, len(entries) - 1)]
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148 entries.append(node)
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149 revisions.append((filename, node, p1, p2, linknode, None))
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diff changeset
150 allentries[(filename, node)] = (p1, p2, linknode)
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151 if p1 == nullid:
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152 ancestorcounts[(filename, node)] = 1
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153 else:
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154 newcount = ancestorcounts[(filename, p1)] + 1
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diff changeset
155 ancestorcounts[(filename, node)] = newcount
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156
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157 # Must add file entries in reverse topological order
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158 revisions = list(reversed(revisions))
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diff changeset
159 pack = self.createPack(revisions)
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160
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161 # Verify the pack contents
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diff changeset
162 for (filename, node), (p1, p2, lastnode) in allentries.iteritems():
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diff changeset
163 ancestors = pack.getancestors(filename, node)
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diff changeset
164 self.assertEquals(ancestorcounts[(filename, node)],
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165 len(ancestors))
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diff changeset
166 for anode, (ap1, ap2, alinknode, copyfrom) in ancestors.iteritems():
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167 ep1, ep2, elinknode = allentries[(filename, anode)]
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diff changeset
168 self.assertEquals(ap1, ep1)
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diff changeset
169 self.assertEquals(ap2, ep2)
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diff changeset
170 self.assertEquals(alinknode, elinknode)
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diff changeset
171 self.assertEquals(copyfrom, None)
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172
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173 def testGetNodeInfo(self):
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174 revisions = []
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175 filename = "foo"
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176 lastnode = nullid
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177 for i in range(10):
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diff changeset
178 node = self.getFakeHash()
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diff changeset
179 revisions.append((filename, node, lastnode, nullid, nullid, None))
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180 lastnode = node
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181
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diff changeset
182 pack = self.createPack(revisions)
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183
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184 # Test that getnodeinfo returns the expected results
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diff changeset
185 for filename, node, p1, p2, linknode, copyfrom in revisions:
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diff changeset
186 ap1, ap2, alinknode, acopyfrom = pack.getnodeinfo(filename, node)
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diff changeset
187 self.assertEquals(ap1, p1)
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diff changeset
188 self.assertEquals(ap2, p2)
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diff changeset
189 self.assertEquals(alinknode, linknode)
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diff changeset
190 self.assertEquals(acopyfrom, copyfrom)
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191
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diff changeset
192 def testGetMissing(self):
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diff changeset
193 """Test the getmissing() api.
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194 """
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diff changeset
195 revisions = []
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diff changeset
196 filename = "foo"
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diff changeset
197 for i in range(10):
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diff changeset
198 node = self.getFakeHash()
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diff changeset
199 p1 = self.getFakeHash()
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diff changeset
200 p2 = self.getFakeHash()
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diff changeset
201 linknode = self.getFakeHash()
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parents:
diff changeset
202 revisions.append((filename, node, p1, p2, linknode, None))
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diff changeset
203
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Augie Fackler <augie@google.com>
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diff changeset
204 pack = self.createPack(revisions)
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parents:
diff changeset
205
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Augie Fackler <augie@google.com>
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diff changeset
206 missing = pack.getmissing([(filename, revisions[0][1])])
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parents:
diff changeset
207 self.assertFalse(missing)
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diff changeset
208
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diff changeset
209 missing = pack.getmissing([(filename, revisions[0][1]),
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parents:
diff changeset
210 (filename, revisions[1][1])])
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Augie Fackler <augie@google.com>
parents:
diff changeset
211 self.assertFalse(missing)
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parents:
diff changeset
212
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Augie Fackler <augie@google.com>
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diff changeset
213 fakenode = self.getFakeHash()
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Augie Fackler <augie@google.com>
parents:
diff changeset
214 missing = pack.getmissing([(filename, revisions[0][1]),
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parents:
diff changeset
215 (filename, fakenode)])
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parents:
diff changeset
216 self.assertEquals(missing, [(filename, fakenode)])
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parents:
diff changeset
217
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Augie Fackler <augie@google.com>
parents:
diff changeset
218 # Test getmissing on a non-existant filename
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parents:
diff changeset
219 missing = pack.getmissing([("bar", fakenode)])
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parents:
diff changeset
220 self.assertEquals(missing, [("bar", fakenode)])
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parents:
diff changeset
221
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Augie Fackler <augie@google.com>
parents:
diff changeset
222 def testAddThrows(self):
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parents:
diff changeset
223 pack = self.createPack()
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Augie Fackler <augie@google.com>
parents:
diff changeset
224
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Augie Fackler <augie@google.com>
parents:
diff changeset
225 try:
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Augie Fackler <augie@google.com>
parents:
diff changeset
226 pack.add('filename', nullid, nullid, nullid, nullid, None)
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Augie Fackler <augie@google.com>
parents:
diff changeset
227 self.assertTrue(False, "historypack.add should throw")
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Augie Fackler <augie@google.com>
parents:
diff changeset
228 except RuntimeError:
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parents:
diff changeset
229 pass
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Augie Fackler <augie@google.com>
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diff changeset
230
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Augie Fackler <augie@google.com>
parents:
diff changeset
231 def testBadVersionThrows(self):
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Augie Fackler <augie@google.com>
parents:
diff changeset
232 pack = self.createPack()
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Augie Fackler <augie@google.com>
parents:
diff changeset
233 path = pack.path + '.histpack'
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Augie Fackler <augie@google.com>
parents:
diff changeset
234 with open(path) as f:
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Augie Fackler <augie@google.com>
parents:
diff changeset
235 raw = f.read()
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Augie Fackler <augie@google.com>
parents:
diff changeset
236 raw = struct.pack('!B', 255) + raw[1:]
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Augie Fackler <augie@google.com>
parents:
diff changeset
237 os.chmod(path, os.stat(path).st_mode | stat.S_IWRITE)
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Augie Fackler <augie@google.com>
parents:
diff changeset
238 with open(path, 'w+') as f:
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Augie Fackler <augie@google.com>
parents:
diff changeset
239 f.write(raw)
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Augie Fackler <augie@google.com>
parents:
diff changeset
240
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Augie Fackler <augie@google.com>
parents:
diff changeset
241 try:
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Augie Fackler <augie@google.com>
parents:
diff changeset
242 pack = historypack.historypack(pack.path)
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Augie Fackler <augie@google.com>
parents:
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243 self.assertTrue(False, "bad version number should have thrown")
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244 except RuntimeError:
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245 pass
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246
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247 def testLargePack(self):
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248 """Test creating and reading from a large pack with over X entries.
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249 This causes it to use a 2^16 fanout table instead."""
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250 total = basepack.SMALLFANOUTCUTOFF + 1
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251 revisions = []
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252 for i in xrange(total):
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253 filename = "foo-%s" % i
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254 node = self.getFakeHash()
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255 p1 = self.getFakeHash()
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256 p2 = self.getFakeHash()
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257 linknode = self.getFakeHash()
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258 revisions.append((filename, node, p1, p2, linknode, None))
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259
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260 pack = self.createPack(revisions)
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261 self.assertEquals(pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX)
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262
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263 for filename, node, p1, p2, linknode, copyfrom in revisions:
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264 actual = pack.getancestors(filename, node)[node]
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265 self.assertEquals(p1, actual[0])
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266 self.assertEquals(p2, actual[1])
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267 self.assertEquals(linknode, actual[2])
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268 self.assertEquals(copyfrom, actual[3])
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269 # TODO:
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270 # histpack store:
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271 # - repack two packs into one
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272
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273 if __name__ == '__main__':
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274 silenttestrunner.main(__name__)