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annotate tests/testlib/ext-sidedata.py @ 43042:03e769278ef3

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sidedata: check that the sidedata safely roundtrip We actually use the data we stored during the test. It is a way to make sure their content is not corrupted. Differential Revision: https://phab.mercurial-scm.org/D6898
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 10 Sep 2019 00:30:53 +0200
parents ba4072c0a911
children 2372284d9457
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1 # ext-sidedata.py - small extension to test the sidedata logic
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2 #
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3 # Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net)
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import hashlib
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11 import struct
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12
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13 from mercurial import (
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14 extensions,
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15 node,
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16 revlog,
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17 )
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18
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19 from mercurial.revlogutils import (
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20 sidedata,
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21 )
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22
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23 def wrapaddrevision(orig, self, text, transaction, link, p1, p2, *args,
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24 **kwargs):
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25 if kwargs.get('sidedata') is None:
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26 kwargs['sidedata'] = {}
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27 sd = kwargs['sidedata']
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28 ## let's store some arbitrary data just for testing
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29 # text length
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30 sd[sidedata.SD_TEST1] = struct.pack('>I', len(text))
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31 # and sha2 hashes
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32 sha256 = hashlib.sha256(text).digest()
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33 sd[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
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34 return orig(self, text, transaction, link, p1, p2, *args, **kwargs)
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35
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36 def wraprevision(orig, self, nodeorrev, *args, **kwargs):
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37 text = orig(self, nodeorrev, *args, **kwargs)
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38 if nodeorrev != node.nullrev and nodeorrev != node.nullid:
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39 sd = self.sidedata(nodeorrev)
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40 if len(text) != struct.unpack('>I', sd[sidedata.SD_TEST1])[0]:
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41 raise RuntimeError('text size mismatch')
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42 expected = sd[sidedata.SD_TEST2]
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43 got = hashlib.sha256(text).digest()
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44 if got != expected:
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45 raise RuntimeError('sha256 mismatch')
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46 return text
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47
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48 def extsetup(ui):
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49 extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
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50 extensions.wrapfunction(revlog.revlog, 'revision', wraprevision)