diff -r 40d7b0c4abb1 -r 4fd0db2f6d84 tests/test-evolve.t
--- a/tests/test-evolve.t	Mon Apr 25 16:24:42 2016 -0700
+++ b/tests/test-evolve.t	Mon Apr 25 16:24:42 2016 -0700
@@ -2,6 +2,7 @@
   > [defaults]
   > amend=-d "0 0"
   > fold=-d "0 0"
+  > metaedit=-d "0 0"
   > [web]
   > push_ssl = false
   > allow_push = *
@@ -1457,3 +1458,67 @@
 
   $ hg status newlyadded
   A newlyadded
+
+hg metaedit
+-----------
+
+  $ hg update --clean .
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ rm newlyadded
+  $ hg metaedit -r 0
+  abort: cannot edit commit information for public revisions
+  [255]
+check that metaedit respects allowunstable
+  $ hg metaedit '.^' --config 'experimental.evolution=createmarkers, allnewcommands'
+  abort: cannot edit commit information in the middle of a stack
+  (c904da5245b0 will be affected)
+  [255]
+  $ hg metaedit --user foobar
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg log --template '{rev}: {author}\n' -r '42:' --hidden
+  42: test
+  43: foobar
+  $ hg log --template '{rev}: {author}\n' -r .
+  43: foobar
+
+TODO: support this
+  $ hg metaedit '.^::.'
+  abort: editing multiple revisions is not currently supported
+  [255]
+
+no new commit is created here because the date is the same
+  $ HGEDITOR=cat hg metaedit
+  will be evolved safely
+  
+  
+  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
+  HG: Leave message empty to abort commit.
+  HG: --
+  HG: user: foobar
+  HG: branch 'default'
+  HG: changed a
+  nothing changed
+
+  $ glog -r '.^::.'
+  @  43:62353add3dfb@default(draft) will be evolved safely
+  |
+  o  41:34ae045ec400@default(draft) amended
+  |
+  ~
+
+TODO: don't create a new commit in this case
+  $ hg metaedit --config defaults.metaedit=
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg log -r '.^::.' --template '{rev}: {desc|firstline}\n'
+  41: amended
+  44: will be evolved safely
+
+  $ hg up .^
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg metaedit --user foobar2 44
+  $ hg log --template '{rev}: {author}\n' -r '42:' --hidden
+  42: test
+  43: foobar
+  44: foobar
+  45: foobar2
+  $ hg diff -r 44 -r 45 --hidden