tests/test-update-issue1456.t

histedt: use inheritance to override the constraints in 'base'

All actions but one actually have the same constraints when it comes to validate
the 'action.node' value. So we actually just add this code to a method that can
be overwritten in the one action where it matters.

The now unused 'contraints' related enum and class attribute will be cleaned up
in the next changeset.

#require execbit

  $ rm -rf a
  $ hg init a
  $ cd a

  $ echo foo > foo
  $ hg ci -qAm0
  $ echo toremove > toremove
  $ echo todelete > todelete
  $ chmod +x foo toremove todelete
  $ hg ci -qAm1

Test that local removed/deleted, remote removed works with flags
  $ hg rm toremove
  $ rm todelete
  $ hg co -q 0

  $ echo dirty > foo
  $ hg up -c
  abort: uncommitted changes
  [255]
  $ hg up -q
  $ cat foo
  dirty
  $ hg st -A
  M foo
  C todelete
  C toremove

Validate update of standalone execute bit change:

  $ hg up -C 0
  1 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ chmod -x foo
  $ hg ci -m removeexec
  nothing changed
  [1]
  $ hg up -C 0
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg up
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg st

  $ cd ..