--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-topic-flow-single-head.t	Mon Oct 30 19:24:14 2017 +0100
@@ -0,0 +1,189 @@
+=====================
+Test workflow options
+=====================
+
+  $ . "$TESTDIR/testlib/topic_setup.sh"
+  $ . "$TESTDIR/testlib/common.sh"
+
+Test single head enforcing - Setup
+=============================================
+
+  $ hg init single-head-server
+  $ cd single-head-server
+  $ cat <<EOF >> .hg/hgrc
+  > [phases]
+  > publish = no
+  > [experimental]
+  > enforce-single-head = yes
+  > evolution = all
+  > EOF
+  $ mkcommit ROOT
+  $ mkcommit c_dA0
+  $ cd ..
+
+  $ hg clone single-head-server client
+  updating to branch default
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+Test single head enforcing - with branch only
+---------------------------------------------
+
+  $ cd client
+
+continuing the current defaultbranch
+
+  $ mkcommit c_dB0
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+
+creating a new branch
+
+  $ hg up 'desc("ROOT")'
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ hg branch branch_A
+  marked working directory as branch branch_A
+  (branches are permanent and global, did you want a bookmark?)
+  $ mkcommit c_aC0
+  $ hg push --new-branch
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files (+1 heads)
+
+Create a new head on the default branch
+
+  $ hg up 'desc("c_dA0")'
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit c_dD0
+  created new head
+  $ hg push -f
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files (+1 heads)
+  transaction abort!
+  rollback completed
+  abort: 2 heads on "default"
+  (286d02a6e2a2, 9bf953aa81f6)
+  [255]
+
+remerge them
+
+  $ hg merge
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ mkcommit c_dE0
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 2 files
+
+Test single head enforcing - with topic
+---------------------------------------
+
+pushing a new topic
+
+  $ hg topic foo
+  marked working directory as topic: foo
+  $ mkcommit c_dF0
+  active topic 'foo' grew its first changeset
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+
+pushing a new topo branch (with a topic)
+
+  $ hg up 'desc("c_dD0")'
+  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  $ hg topic bar
+  marked working directory as topic: bar
+  $ mkcommit c_dG0
+  active topic 'bar' grew its first changeset
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files (+1 heads)
+
+detect multiple heads on the topic
+
+  $ mkcommit c_dH0
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  $ hg up 'desc("c_dG0")'
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit c_dI0
+  $ hg push  -f
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files (+1 heads)
+  transaction abort!
+  rollback completed
+  abort: 2 heads on "default:bar"
+  (5194f5dcd542, 48a01453c1c5)
+  [255]
+
+merge works fine
+
+  $ hg merge
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ mkcommit c_dJ0
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 2 files
+
+Test single head enforcing - by phase move
+------------------------------------------
+
+  $ hg -R ../single-head-server phase --public 'desc("c_dJ0")'
+  abort: 2 heads on "default"
+  (6ed1df20edb1, 678bca4de98c)
+  [255]
+
+Test single head enforcing - after rewrite
+------------------------------------------
+
+  $ hg up foo
+  switching to topic foo
+  3 files updated, 0 files merged, 4 files removed, 0 files unresolved
+  $ hg commit --amend -m c_dF1
+  $ hg push
+  pushing to $TESTTMP/single-head-server
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 0 changes to 1 files (+1 heads)
+  1 new obsolescence markers
+  obsoleted 1 changesets