tests/test-bookmarks-rebase.t

ancestor.missingancestors: turn into a state-keeping class

This allows multiple efficient missing ancestor queries against the same set of
bases. In upcoming patches we'll also define ways to grow the set of bases.

The fact that the test output hasn't changed establishes this patch's
correctness.

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "rebase=" >> $HGRCPATH

initialize repository

  $ hg init

  $ echo 'a' > a
  $ hg ci -A -m "0"
  adding a

  $ echo 'b' > b
  $ hg ci -A -m "1"
  adding b

  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'c' > c
  $ hg ci -A -m "2"
  adding c
  created new head

  $ echo 'd' > d
  $ hg ci -A -m "3"
  adding d

  $ hg bookmark -r 1 one
  $ hg bookmark -r 3 two
  $ hg up -q two

bookmark list

  $ hg bookmark
     one                       1:925d80f479bb
   * two                       3:2ae46b1d99a7

rebase

  $ hg rebase -s two -d one
  saved backup bundle to $TESTTMP/.hg/strip-backup/*-backup.hg (glob)

  $ hg log
  changeset:   3:42e5ed2cdcf4
  bookmark:    two
  tag:         tip
  parent:      1:925d80f479bb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3
  
  changeset:   2:db815d6d32e6
  parent:      0:f7b1eb17ad24
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   1:925d80f479bb
  bookmark:    one
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  changeset:   0:f7b1eb17ad24
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0