--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-checkheads-superceed-A6.t	Fri Mar 31 13:42:28 2017 +0200
@@ -0,0 +1,95 @@
+====================================
+Testing head checking code: Case A-6
+====================================
+
+Mercurial checks for the introduction of multiple heads on push. Evolution
+comes into play to detect if existing heads on the server are being replaced by
+some of the new heads we push.
+
+This test file is part of a series of tests checking this behavior.
+
+Category A: checking simple case invoving a branch being superceeded by another.
+TestCase 6: multi-changeset branch, split on multiple other, (base on its own branch)
+
+.. old-state:
+..
+.. * 2 branch (1 changeset, and 2 changesets)
+..
+.. new-state:
+..
+.. * 1 new branch superceeding the base of the old-2-changesets-branch,
+.. * 1 new changesets on the old-1-changeset-branch superceeding the head of the other
+..
+.. expected-result:
+..
+.. * push allowed
+..
+.. graph-summary:
+..
+.. B'◔⇢ø B
+..   | |
+.. A | ø⇠◔ A'
+..   | |/
+.. C ● |
+..    \|
+..     ●
+
+  $ . $TESTDIR/testlib/checkheads-util.sh
+
+Test setup
+----------
+
+  $ setuprepos
+  creating basic server and client repo
+  updating to branch default
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cd server
+  $ mkcommit B0
+  $ hg up 0
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ mkcommit C0
+  created new head
+  $ cd ../client
+  $ hg pull
+  pulling from $TESTTMP/server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 2 files (+1 heads)
+  (run 'hg heads' to see heads, 'hg merge' to merge)
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A1
+  created new head
+  $ hg up 'desc(C0)'
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit B1
+  $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
+  $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
+  $ hg log -G --hidden
+  @  d70a1f75a020 (draft): B1
+  |
+  | o  f6082bc4ffef (draft): A1
+  | |
+  o |  0f88766e02d6 (draft): C0
+  |/
+  | x  d73caddc5533 (draft): B0
+  | |
+  | x  8aaa48160adc (draft): A0
+  |/
+  o  1e4be0697311 (public): root
+  
+
+
+Actual testing
+--------------
+
+  $ hg push
+  pushing to $TESTTMP/server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 2 files (+1 heads)
+  2 new obsolescence markers