comparison tests/test-branches.t @ 23861:01426cad66dc

tests: rework revision branch cache tests

The tests that were added with the revision branch cache in 678f53865c68 had
suffered from bit rot in the development iterations. They were no longer that
"good".

Now, the tests are rewritten and reworked to be more readable and maintainable
and relevant for the actual implementation.

This also utilizes the new 'f' helper tool for keeping an eye the cache files.

23860:bead0c7b4f68

    "node": "19709c5a4e75bf938f8e349aff97438539bb729e",
    "rev": 0
   }
  ]

revision branch name caching implementation

cache creation
  $ rm .hg/cache/rbc-revs-v1
  $ hg debugrevspec 'branch("re:a ")'
  7
  $ [ -f .hg/cache/rbc-revs-v1 ] || echo no file
  no file
recovery from invalid cache file
  $ echo > .hg/cache/rbc-revs-v1
  $ hg debugrevspec 'branch("re:a ")'
  7
cache update NOT fully written from revset
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  68b329da9893e34099c7d8ad5cb9c940  .hg/cache/rbc-revs-v1
recovery from other corruption - extra trailing data
  $ echo >> .hg/cache/rbc-revs-v1
  $ hg debugrevspec 'branch("re:a ")'
  7
cache update NOT fully written from revset
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  e1c06d85ae7b8b032bef47e42e4c08f9  .hg/cache/rbc-revs-v1
lazy update after commit
  $ hg tag tag
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  d0c0166808ee0a1f0e8894915ad363b6  .hg/cache/rbc-revs-v1
  $ hg debugrevspec 'branch("re:a ")'
  7
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  d0c0166808ee0a1f0e8894915ad363b6  .hg/cache/rbc-revs-v1
update after rollback - cache keeps stripped revs until written for other reasons
  $ hg up -qr '.^'
  $ hg rollback -qf
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  d8c2acdc229bf942fde1dfdbe8f9d933  .hg/cache/rbc-revs-v1
  $ hg debugrevspec 'branch("re:a ")'
  7
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  d8c2acdc229bf942fde1dfdbe8f9d933  .hg/cache/rbc-revs-v1
handle history mutations that doesn't change the tip node - this is a problem
with the cache invalidation scheme used by branchmap
  $ hg log -r tip+b -T'{rev}:{node|short} {branch}\n'
  14:f894c25619d3 c
  13:e23b5505d1ad b
  $ hg bundle -q --all bu.hg
  $ hg --config extensions.strip= strip --no-b -qr -1:
  $ hg up -q tip
  $ hg branch
  b
  $ hg branch -q hacked
  $ hg ci --amend -qm 'hacked'
  $ hg pull -q bu.hg -r f894c25619d3
  $ hg log -r tip+b -T'{rev}:{node|short} {branch}\n'
  14:f894c25619d3 c
  12:e3d49c0575d8 b
  $ hg debugrevspec 'branch("hacked")'
  13
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  22424d7e106c894336d9d705b0241bc5  .hg/cache/rbc-revs-v1
cleanup, restore old state
  $ hg --config extensions.strip= strip --no-b -qr -2:
  $ hg pull -q bu.hg
  $ rm bu.hg
  $ hg up -qr tip
  $ hg log -r tip -T'{rev}:{node|short}\n'
  14:f894c25619d3
the cache file do not go back to the old state - it still contains the
now unused 'hacked' branch name)
  $ hg debugrevspec 'branch("re:a ")'
  7
  $ "$TESTDIR/md5sum.py" .hg/cache/rbc-revs-v1
  d8c2acdc229bf942fde1dfdbe8f9d933  .hg/cache/rbc-revs-v1
  $ cat .hg/cache/rbc-names-v1
  default\x00a\x00b\x00c\x00a branch name much longer than the default justification used by branches\x00hacked (no-eol) (esc)

  $ cd ..

23861:01426cad66dc

    "node": "19709c5a4e75bf938f8e349aff97438539bb729e",
    "rev": 0
   }
  ]


Tests of revision branch name caching

We rev branch cache is updated automatically. In these tests we use a trick to
trigger rebuilds. We remove the branch head cache and run 'hg head' to cause a
rebuild that also will populate the rev branch cache.

revision branch cache is created when building the branch head cache
  $ rm -rf .hg/cache; hg head a -T '{rev}\n'
  5
  $ f --hexdump --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=87
  0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a |
  0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much|
  0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the|
  0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi|
  0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b|
  0050: 72 61 6e 63 68 65 73                            |ranches|
  .hg/cache/rbc-revs-v1: size=120
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
  0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....|
  0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................|
  0030: 58 97 36 a2 00 00 00 03 10 ff 58 95 00 00 00 04 |X.6.......X.....|
  0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....|
  0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....|
  0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....|
  0070: f8 94 c2 56 80 00 00 03                         |...V....|
recovery from invalid cache revs file with trailing data
  $ echo >> .hg/cache/rbc-revs-v1
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=120
recovery from invalid cache file with partial last record
  $ mv .hg/cache/rbc-revs-v1 .
  $ f -qDB 119 rbc-revs-v1 > .hg/cache/rbc-revs-v1
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=119
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=120
recovery from invalid cache file with missing record - no truncation
  $ mv .hg/cache/rbc-revs-v1 .
  $ f -qDB 112 rbc-revs-v1 > .hg/cache/rbc-revs-v1
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=120
recovery from invalid cache file with some bad records
  $ mv .hg/cache/rbc-revs-v1 .
  $ f -qDB 8 rbc-revs-v1 > .hg/cache/rbc-revs-v1
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=8
  $ f -qDB 112 rbc-revs-v1 >> .hg/cache/rbc-revs-v1
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=120
  $ hg log -r 'branch(.)' -T '{rev} '
  3 4 8 9 10 11 12 13  (no-eol)
  $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
  5
  $ f --size --hexdump --bytes=16 .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=120
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
cache is updated when committing
  $ hg branch i-will-regret-this
  marked working directory as branch i-will-regret-this
  (branches are permanent and global, did you want a bookmark?)
  $ hg ci -m regrets
  $ f --size .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=106
  .hg/cache/rbc-revs-v1: size=128
update after rollback - the cache will be correct but rbc-names will will still
contain the branch name even though it no longer is used
  $ hg up -qr '.^'
  $ hg rollback -qf
  $ f --size --hexdump .hg/cache/rbc-*
  .hg/cache/rbc-names-v1: size=106
  0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a |
  0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much|
  0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the|
  0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi|
  0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b|
  0050: 72 61 6e 63 68 65 73 00 69 2d 77 69 6c 6c 2d 72 |ranches.i-will-r|
  0060: 65 67 72 65 74 2d 74 68 69 73                   |egret-this|
  .hg/cache/rbc-revs-v1: size=120
  0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....|
  0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....|
  0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................|
  0030: 58 97 36 a2 00 00 00 03 10 ff 58 95 00 00 00 04 |X.6.......X.....|
  0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....|
  0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....|
  0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....|
  0070: f8 94 c2 56 80 00 00 03                         |...V....|
cache is updated/truncated when stripping - it is thus very hard to get in a
situation where the cache is out of sync and the hash check detects it
  $ hg --config extensions.strip= strip -r tip --nob
  $ f --size .hg/cache/rbc-revs*
  .hg/cache/rbc-revs-v1: size=112

  $ cd ..