tests/test-persistent-nodemap.t

gitlog: fix embarassing bug that prevented log from showing correct parents

We had the correct parents in the database, but the changelog was
always returning p1 for all parents. Oops.

Differential Revision: https://phab.mercurial-scm.org/D8263

===================================
Test the persistent on-disk nodemap
===================================


  $ hg init test-repo
  $ cd test-repo
  $ cat << EOF >> .hg/hgrc
  > [experimental]
  > exp-persistent-nodemap=yes
  > [devel]
  > persistent-nodemap=yes
  > EOF
  $ hg debugbuilddag .+5000
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5000
  data-length: 122880
  data-unused: 0
  $ f --size .hg/store/00changelog.n
  .hg/store/00changelog.n: size=42

Simple lookup works

  $ ANYNODE=`hg log --template '{node|short}\n' --rev tip`
  $ hg log -r "$ANYNODE" --template '{rev}\n'
  5000

  $ f --sha256 .hg/store/00changelog-*.nd
  .hg/store/00changelog-????????????????.nd: sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7 (glob)
  $ hg debugnodemap --dump-new | f --sha256 --size
  size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
  $ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
  size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
  0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0010: ff ff ff ff ff ff ff ff ff ff fa c2 ff ff ff ff |................|
  0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0030: ff ff ff ff ff ff ed b3 ff ff ff ff ff ff ff ff |................|
  0040: ff ff ff ff ff ff ee 34 00 00 00 00 ff ff ff ff |.......4........|
  0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0080: ff ff ff ff ff ff f8 50 ff ff ff ff ff ff ff ff |.......P........|
  0090: ff ff ff ff ff ff ff ff ff ff ec c7 ff ff ff ff |................|
  00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00b0: ff ff ff ff ff ff fa be ff ff f2 fc ff ff ff ff |................|
  00c0: ff ff ff ff ff ff ef ea ff ff ff ff ff ff f9 17 |................|
  00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  $ hg debugnodemap --check
  revision in index:   5001
  revision in nodemap: 5001

add a new commit

  $ hg up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo foo > foo
  $ hg add foo
  $ hg ci -m 'foo'

#if pure
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5001
  data-length: 123072
  data-unused: 192
#else
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5001
  data-length: 122880
  data-unused: 0
#endif
  $ f --size .hg/store/00changelog.n
  .hg/store/00changelog.n: size=42

(The pure code use the debug code that perform incremental update, the C code reencode from scratch)

#if pure
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=123072, sha256=136472751566c8198ff09e306a7d2f9bd18bd32298d614752b73da4d6df23340 (glob)

#else
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=122880, sha256=bfafebd751c4f6d116a76a37a1dee2a251747affe7efbcc4f4842ccc746d4db9 (glob)

#endif

  $ hg debugnodemap --check
  revision in index:   5002
  revision in nodemap: 5002

Test code path without mmap
---------------------------

  $ echo bar > bar
  $ hg add bar
  $ hg ci -m 'bar' --config experimental.exp-persistent-nodemap.mmap=no

  $ hg debugnodemap --check --config experimental.exp-persistent-nodemap.mmap=yes
  revision in index:   5003
  revision in nodemap: 5003
  $ hg debugnodemap --check --config experimental.exp-persistent-nodemap.mmap=no
  revision in index:   5003
  revision in nodemap: 5003


#if pure
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  data-length: 123328
  data-unused: 384
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=123328, sha256=10d26e9776b6596af0f89143a54eba8cc581e929c38242a02a7b0760698c6c70 (glob)

#else
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  data-length: 122944
  data-unused: 0
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=122944, sha256=755976b22b64ab680401b45395953504e64e7fa8c31ac570f58dee21e15f9bc0 (glob)
#endif

Test force warming the cache

  $ rm .hg/store/00changelog.n
  $ hg debugnodemap --metadata
  $ hg debugupdatecache
#if pure
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  data-length: 122944
  data-unused: 0
#else
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  data-length: 122944
  data-unused: 0
#endif