annotate tests/test-evolve-orphan-merge.t @ 3528:92f1e2408fd0

tests: add a test file of resolving orphaness of merge changesets

This patch adds a new test file named test-evolve-orphan-merge.t which contains
test cases when `hg evolve` try to stabilize a merge changeset which was orphan.

This file contains 20-30% of all the cases as we have got something to fix
before we add tests for rest of the cases. Going by this approach will make sure
we don't live unfixed cases in the test file and the test files does not become
a pile of hacks which are used to get in state when we fix the bugs.

** Testing resolution of orphans by `hg evolve` when merges are involved **

  $ cat >> $HGRCPATH <<EOF
  > [ui]
  > interactive = True
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
  > [extensions]
  > rebase =
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

Repo Setup

  $ hg init repo
  $ cd repo
  $ echo ".*\.orig" > .hgignore
  $ hg add .hgignore
  $ hg ci -m "added hgignore"

An orphan merge changeset with one of the parent obsoleted
==========================================================

1) When merging both the parents does not result in conflicts
-------------------------------------------------------------

  $ echo foo > a
  $ hg ci -Aqm "added a"
  $ hg up .^
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo foo > b
  $ hg ci -Aqm "added b"
  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m "merging a and b"

  $ hg glog
  @    3:3b2b6f4652ee merging a and b
  |\    () draft
  | o  2:d76850646258 added b
  | |   () draft
  o |  1:c7586e2a9264 added a
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Testing with obsoleting the second parent

  $ hg up d76850646258
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bar > b
  $ hg amend
  1 new orphan changesets

  $ hg glog
  @  4:64370c9805e7 added b
  |   () draft
  | *    3:3b2b6f4652ee merging a and b
  | |\    () draft
  +---x  2:d76850646258 added b
  | |     () draft
  | o  1:c7586e2a9264 added a
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all
  move:[3] merging a and b
  atop:[4] added b
  working directory is now at 91fd62122a4b

  $ hg glog
  @    5:91fd62122a4b merging a and b
  |\    () draft
  | o  4:64370c9805e7 added b
  | |   () draft
  o |  1:c7586e2a9264 added a
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg parents
  changeset:   5:91fd62122a4b
  tag:         tip
  parent:      4:64370c9805e7
  parent:      1:c7586e2a9264
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merging a and b
  

Testing with obsoleting the first parent

  $ hg up c7586e2a9264
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bar > a
  $ hg amend
  1 new orphan changesets

  $ hg glog
  @  6:3d41537b44ca added a
  |   () draft
  | *    5:91fd62122a4b merging a and b
  | |\    () draft
  +---o  4:64370c9805e7 added b
  | |     () draft
  | x  1:c7586e2a9264 added a
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all
  move:[5] merging a and b
  atop:[6] added a
  working directory is now at 968d205ba4d8

  $ hg glog
  @    7:968d205ba4d8 merging a and b
  |\    () draft
  | o  6:3d41537b44ca added a
  | |   () draft
  o |  4:64370c9805e7 added b
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg parents
  changeset:   7:968d205ba4d8
  tag:         tip
  parent:      6:3d41537b44ca
  parent:      4:64370c9805e7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     merging a and b
  
2) When merging both the parents resulted in conflicts
------------------------------------------------------

  $ hg up 8fa14d15e168
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo foo > c
  $ hg ci -Aqm "foo to c"
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [0] added hgignore
  $ echo bar > c
  $ hg ci -Aqm "bar to c"

  $ hg glog
  @  9:d0f84b25d4e3 bar to c
  |   () draft
  | o  8:1c165c673853 foo to c
  |/    () draft
  | o    7:968d205ba4d8 merging a and b
  | |\    () draft
  +---o  6:3d41537b44ca added a
  | |     () draft
  | o  4:64370c9805e7 added b
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Prune old test changesets to have clear graph view
  $ hg prune -r 64370c9805e7 -r 3d41537b44ca -r 968d205ba4d8
  3 changesets pruned

  $ hg glog
  @  9:d0f84b25d4e3 bar to c
  |   () draft
  | o  8:1c165c673853 foo to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg merge
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ echo foobar > c
  $ hg resolve -m
  (no more unresolved files)
  $ hg ci -m "foobar to c"

  $ hg glog
  @    10:fd41d25a3e90 foobar to c
  |\    () draft
  | o  9:d0f84b25d4e3 bar to c
  | |   () draft
  o |  8:1c165c673853 foo to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Testing with first parent obsoleted

  $ hg up 1c165c673853
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo FOO > c
  $ hg amend
  1 new orphan changesets

  $ hg glog
  @  11:31c317b7bdb1 foo to c
  |   () draft
  | *    10:fd41d25a3e90 foobar to c
  | |\    () draft
  +---o  9:d0f84b25d4e3 bar to c
  | |     () draft
  | x  8:1c165c673853 foo to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all
  move:[10] foobar to c
  atop:[11] foo to c
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ echo FOObar > c
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  evolving 10:fd41d25a3e90 "foobar to c"
  working directory is now at 6b42180a13dd

XXX: we lost the second parent here after interrupted evolve
  $ hg glog
  @  12:6b42180a13dd foobar to c
  |   () draft
  o  11:31c317b7bdb1 foo to c
  |   () draft
  | o  9:d0f84b25d4e3 bar to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg parents
  changeset:   12:6b42180a13dd
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     foobar to c
  
Getting back to a state from where we can test the same thing with obsoleting
the second parent

  $ hg prune -r .
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory now at 31c317b7bdb1
  1 changesets pruned
  $ hg merge
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ echo FOObar > c
  $ hg resolve -m
  (no more unresolved files)
  $ hg commit -m "FOObar to c"

  $ hg glog
  @    13:14ac829917d7 FOObar to c
  |\    () draft
  | o  11:31c317b7bdb1 foo to c
  | |   () draft
  o |  9:d0f84b25d4e3 bar to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Testing a conlficting merge with second parent obsoleted

  $ hg up 31c317b7bdb1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo foo > c
  $ hg amend
  1 new orphan changesets

  $ hg glog
  @  14:928097d0b5b5 foo to c
  |   () draft
  | *    13:14ac829917d7 FOObar to c
  | |\    () draft
  +---x  11:31c317b7bdb1 foo to c
  | |     () draft
  | o  9:d0f84b25d4e3 bar to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all
  move:[13] FOObar to c
  atop:[14] foo to c
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ echo foobar > c
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue

  $ hg evolve --continue
  evolving 13:14ac829917d7 "FOObar to c"
  working directory is now at 910c14950386

XXX: we lost a parent here again.
  $ hg glog
  @  15:910c14950386 FOObar to c
  |   () draft
  o  14:928097d0b5b5 foo to c
  |   () draft
  | o  9:d0f84b25d4e3 bar to c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft