--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-checkheads-pruned-B6.t	Fri Mar 31 15:47:31 2017 +0200
@@ -0,0 +1,74 @@
+====================================
+Testing head checking code: Case B-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 B: checking simple case involving pruned changesets
+TestCase 6: single changesets, pruned then superseeded (on a new changeset)
+
+.. old-state:
+..
+.. * 1 changeset branch
+..
+.. new-state:
+..
+.. * old branch is rewritten onto another one,
+.. * the new version is then pruned.
+..
+.. expected-result:
+..
+.. * push allowed
+..
+.. graph-summary:
+..
+..   A ø⇠⊗ A'
+..     | |
+..     | ◔ B
+..     |/
+..     ○
+
+  $ . $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 client
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit B0
+  created new head
+  $ mkcommit A1
+  $ hg up 'desc(B0)'
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg debugobsolete `getid "desc(A0)"` `getid "desc(A1)"`
+  $ hg debugobsolete --record-parents `getid "desc(A1)"`
+  $ hg log -G --hidden
+  x  ba93660aff8d (draft): A1
+  |
+  @  74ff5441d343 (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 1 changesets with 1 changes to 1 files (+1 heads)
+  2 new obsolescence markers