view tests/test-sidedata.t @ 52053:af54626bf358

dirstate-map: add a missing debug wait point when accessing the v2 docket

fc8e37c380d3 added synchronization points to the dirstate to allow for race
condition testing without actually requiring a time-based race condition
to happen.

This changes adds the `pre-read-file` wait point before we read the docket,
since callers might ask for the parents before anything else is
read, leading to the first read being done before the wait point.

This removes some differences in test output which were presumed to be
speed related, but weren't.

==========================================================
Test file dedicated to checking side-data related behavior
==========================================================

Check data can be written/read from sidedata
============================================

  $ cat << EOF >> $HGRCPATH
  > [extensions]
  > testsidedata=$TESTDIR/testlib/ext-sidedata.py
  > EOF

  $ hg init test-sidedata --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data
  $ cd test-sidedata
  $ echo aaa > a
  $ hg add a
  $ hg commit -m a --traceback
  $ echo aaa > b
  $ hg add b
  $ hg commit -m b
  $ echo xxx >> a
  $ hg commit -m aa

  $ hg debugsidedata -c 0
  2 sidedata entries
   entry-0001 size 4
   entry-0002 size 32
  $ hg debugsidedata -c 1 -v
  2 sidedata entries
   entry-0001 size 4
    '\x00\x00\x006'
   entry-0002 size 32
    '\x98\t\xf9\xc4v\xf0\xc5P\x90\xf7wRf\xe8\xe27e\xfc\xc1\x93\xa4\x96\xd0\x1d\x97\xaaG\x1d\xd7t\xfa\xde'
  $ hg debugsidedata -m 2
  2 sidedata entries
   entry-0001 size 4
   entry-0002 size 32
  $ hg debugsidedata a  1
  2 sidedata entries
   entry-0001 size 4
   entry-0002 size 32

  $ hg debug-revlog-index --verbose -c
     rev   rank linkrev       nodeid p1-rev    p1-nodeid p2-rev    p2-nodeid            full-size delta-base flags comp-mode          data-offset chunk-size sd-comp-mode      sidedata-offset sd-chunk-size
       0     -1       0 7049e48789d7     -1 000000000000     -1 000000000000                   54          0     0         0                    0         54        plain                    0            90
       1     -1       1 2707720c6597      0 7049e48789d7     -1 000000000000                   54          1     0         0                   54         54        plain                   90            90
       2     -1       2 40f977031323      1 2707720c6597     -1 000000000000                   55          2     0         0                  108         55        plain                  180            90

  $ hg debug-revlog-index --verbose -m
     rev   rank linkrev       nodeid p1-rev    p1-nodeid p2-rev    p2-nodeid            full-size delta-base flags comp-mode          data-offset chunk-size sd-comp-mode      sidedata-offset sd-chunk-size
       0     -1       0 b85d294330e3     -1 000000000000     -1 000000000000                   43          0     0         0                    0         43        plain                    0            90
       1     -1       1 1a0aec305c63      0 b85d294330e3     -1 000000000000                   86          0     0         0                   43         55        plain                   90            90
       2     -1       2 104258a4f75f      1 1a0aec305c63     -1 000000000000                   86          1     0         0                   98         55        plain                  180            90

Check upgrade behavior
======================

Right now, sidedata has not upgrade support

Check that we can upgrade to sidedata
-------------------------------------

  $ hg init up-no-side-data --config experimental.revlogv2=no
  $ hg debugformat -v -R up-no-side-data | grep -E 'changelog-v2|revlog-v2'
  revlog-v2:           no     no      no
  changelog-v2:        no     no      no
  $ hg debugformat -v -R up-no-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data | grep -E 'changelog-v2|revlog-v2'
  revlog-v2:           no    yes      no
  changelog-v2:        no     no      no
  $ hg debugupgraderepo -R up-no-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data > /dev/null

Check that we can downgrade from sidedata
-----------------------------------------

  $ hg init up-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data
  $ hg debugformat -v -R up-side-data | grep -E 'changelog-v2|revlog-v2'
  revlog-v2:          yes     no      no
  changelog-v2:        no     no      no
  $ hg debugformat -v -R up-side-data --config experimental.revlogv2=no | grep -E 'changelog-v2|revlog-v2'
  revlog-v2:          yes     no      no
  changelog-v2:        no     no      no
  $ hg debugupgraderepo -R up-side-data --config experimental.revlogv2=no > /dev/null