diff -r fe83cb0dcafa -r 11b6d32e6b2f tests/test-push-checkheads-partial-C2.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-push-checkheads-partial-C2.t	Thu Apr 13 16:26:37 2017 +0200
@@ -0,0 +1,82 @@
+====================================
+Testing head checking code: Case C-2
+====================================
+
+Mercurial checks for the introduction of new heads on push. Evolution comes
+into play to detect if existing branches on the server are being replaced by
+some of the new one we push.
+
+This case is part of a series of tests checking this behavior.
+
+Category C: case were the branch is only partially obsoleted
+TestCase 2: 2 changeset branch, only the base is rewritten
+
+.. old-state:
+..
+.. * 2 changeset branch
+..
+.. new-state:
+..
+.. * 1 new changesets branches superceeding only the base of the old one
+.. * The old branch is still alive (base is obsolete, head is alive)
+..
+.. expected-result:
+..
+.. * push denied
+..
+.. graph-summary:
+..
+..   B ○
+..     |
+..   A ø⇠◔ A'
+..     |/
+..     ●
+
+  $ . $TESTDIR/testlib/push-checkheads-util.sh
+
+Test setup
+----------
+
+  $ mkdir C2
+  $ cd C2
+  $ 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
+  $ cd ../client
+  $ hg pull
+  pulling from $TESTTMP/C2/server (glob)
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  (run 'hg update' to get a working copy)
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A1
+  created new head
+  $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
+  $ hg log -G --hidden
+  @  f6082bc4ffef (draft): A1
+  |
+  | o  d73caddc5533 (draft): B0
+  | |
+  | x  8aaa48160adc (draft): A0
+  |/
+  o  1e4be0697311 (public): root
+  
+
+Actual testing
+--------------
+
+  $ hg push --rev 'desc(A1)'
+  pushing to $TESTTMP/C2/server (glob)
+  searching for changes
+  abort: push creates new remote head f6082bc4ffef!
+  (merge or see 'hg help push' for details about pushing new heads)
+  [255]
+
+  $ cd ../..