--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-single-head-obsolescence-named-branch-A3.t	Wed Mar 11 23:56:11 2020 +0100
@@ -0,0 +1,118 @@
+=========================================
+Testing single head enforcement: Case A-3
+=========================================
+
+A repository is set to only accept a single head per name (typically named
+branch). However, obsolete changesets can make this enforcement more
+complicated, because they can be kept visible by other changeset on other
+branch.
+
+This case is part of a series of tests checking this behavior.
+
+Category A: Involving obsolescence
+TestCase 3: Full superceedig of a branch interleaved with another
+
+.. old-state:
+..
+.. * 2 changeset changeset on branch default
+.. * 2 changeset changeset on branch Z interleaved with the other
+..
+.. new-state:
+..
+.. * 2 changeset changeset on branch Z at the same location
+.. * 2 changeset changeset on branch default superceeding the other ones
+..
+.. expected-result:
+..
+.. * only one head detected
+..
+.. graph-summary:
+..
+..   D ●      (branch Z)
+..     |
+..   C ø⇠◔ C'
+..     | |
+..   B ● |    (branch Z)
+..     | |
+..   A ø⇠◔ A'
+..     |/
+..     ●
+
+  $ . $TESTDIR/testlib/topic_setup.sh
+  $ . $TESTDIR/testlib/push-checkheads-util.sh
+
+Test setup
+----------
+
+  $ mkdir A3
+  $ cd A3
+  $ setuprepos single-head
+  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 branch Z
+  marked working directory as branch Z
+  (branches are permanent and global, did you want a bookmark?)
+  $ mkcommit B0
+  $ hg branch default --force
+  marked working directory as branch default
+  $ mkcommit C0
+  created new head
+  (consider using topic for lightweight branches. See 'hg help topic')
+  $ hg branch Z --force
+  marked working directory as branch Z
+  $ mkcommit D0
+  created new head
+  (consider using topic for lightweight branches. See 'hg help topic')
+  $ hg push --new-branch
+  pushing to $TESTTMP/A3/server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 3 changesets with 3 changes to 3 files
+  $ hg up 0
+  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
+  $ mkcommit A1
+  created new head
+  (consider using topic for lightweight branches. See 'hg help topic')
+  $ mkcommit C1
+  $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
+  1 new obsolescence markers
+  obsoleted 1 changesets
+  3 new orphan changesets
+  $ hg debugobsolete `getid "desc(C0)" ` `getid "desc(C1)"`
+  1 new obsolescence markers
+  obsoleted 1 changesets
+  $ hg log -G --hidden
+  @  0c76bc104656 [default] (draft): C1
+  |
+  o  f6082bc4ffef [default] (draft): A1
+  |
+  | *  78578c4306ce [Z] (draft): D0
+  | |
+  | x  afc55ba2ce61 [default] (draft): C0
+  | |
+  | *  93e5c1321ece [Z] (draft): B0
+  | |
+  | x  8aaa48160adc [default] (draft): A0
+  |/
+  o  1e4be0697311 [default] (public): root
+  
+
+Actual testing
+--------------
+
+(force push to make sure we get the changeset on the remote)
+
+  $ hg push -r 'desc("C1")' --force
+  pushing to $TESTTMP/A3/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
+  obsoleted 2 changesets
+  2 new orphan changesets