--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-push-checkheads-multi-topics-F3.t	Mon Apr 06 02:56:43 2020 +0200
@@ -0,0 +1,101 @@
+====================================
+Testing head checking code: Case E-3
+====================================
+
+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 E: case involving changeset on multiple branch
+TestCase 8: moving only part of the interleaved branch away, creating 2 heads
+
+.. old-state:
+..
+.. * 2-changeset on topic Y
+.. * 1-changeset on topic Z (between the two other)
+..
+.. new-state:
+..
+.. * 2-changeset on topic Y, on untouched, the other moved
+.. * 1-changeset on topic Z (at the same location)
+..
+.. expected-result:
+..
+.. * push rejected
+..
+.. graph-summary:
+..
+..   C ø⇠◔ C' topic Y
+..     | |
+..   B ◔ |    topic Z
+..     | |
+..   A ◔ |    topic Y
+..     |/
+..     ●
+
+  $ . $TESTDIR/testlib/topic_setup.sh
+  $ . $TESTDIR/testlib/push-checkheads-util.sh
+
+Test setup
+----------
+
+  $ mkdir E1
+  $ cd E1
+  $ 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 topic -r . Y
+  switching to topic Y
+  changed topic on 1 changesets to "Y"
+  $ hg strip --config extensions.strip= --hidden 'hidden()' # clean old A0
+  saved backup bundle to $TESTTMP/E1/client/.hg/strip-backup/8aaa48160adc-19166392-backup.hg
+  $ hg topic Z
+  $ mkcommit B0
+  active topic 'Z' grew its first changeset
+  (see 'hg help topics' for more information)
+  $ hg topic Y
+  $ mkcommit C0
+  $ hg push
+  pushing to $TESTTMP/E1/server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 3 changesets with 2 changes to 3 files (+1 heads)
+  1 new obsolescence markers
+  obsoleted 1 changesets
+  $ hg up 0
+  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  $ hg topic Y
+  marked working directory as topic: Y
+  $ mkcommit C1
+  $ hg debugobsolete `getid "desc(C0)" ` `getid "desc(C1)"`
+  1 new obsolescence markers
+  obsoleted 1 changesets
+  $ hg log -G --hidden
+  @  57530ca5eb24 (draft)[Y]: C1
+  |
+  | x  345721b128e8 (draft)[Y]: C0
+  | |
+  | o  e1494106e1ca (draft)[Z]: B0
+  | |
+  | o  f5cd873e2965 (draft)[Y]: A0
+  |/
+  o  1e4be0697311 (public): root
+  
+
+Actual testing
+--------------
+
+  $ hg push -r 'desc("C1")'
+  pushing to $TESTTMP/E1/server
+  searching for changes
+  abort: push creates new remote head 57530ca5eb24 on branch 'default:Y'!
+  (merge or see 'hg help push' for details about pushing new heads)
+  [255]
+
+  $ cd ../..