tests/test-resolve.t

revset: fix infinite alias expansion detection

The alias expansion code it changed from:
1- Get replacement tree
2- Substitute arguments in the replacement tree
3- Expand the replacement tree again

into:

1- Get the replacement tree
2- Expand the replacement tree
3- Expand the arguments
4- Substitute the expanded arguments in the replacement tree

and fixes cases like:

  [revsetalias]
  level1($1, $2) = $1 or $2
  level2($1, $2) = level1($2, $1)

  $ hg log -r "level2(level1(1, 2), 3)"

where the original version incorrectly aborted on infinite expansion
error, because it was confusing the expanded aliases with their
arguments.

test that a commit clears the merge state.

  $ hg init repo
  $ cd repo

  $ echo foo > file
  $ hg commit -Am 'add file'
  adding file

  $ echo bar >> file
  $ hg commit -Am 'append bar'


create a second head

  $ hg up -C 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo baz >> file
  $ hg commit -Am 'append baz'
  created new head

failing merge

  $ hg merge --tool=internal:fail
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
  [1]

  $ echo resolved > file
  $ hg resolve -m file
  $ hg commit -m 'resolved'

resolve -l, should be empty

  $ hg resolve -l

test crashed merge with empty mergestate

  $ mkdir .hg/merge
  $ touch .hg/merge/state

resolve -l, should be empty

  $ hg resolve -l