--- a/tests/_exc-util.sh	Mon Mar 03 14:03:41 2014 -0800
+++ b/tests/_exc-util.sh	Mon Mar 03 14:59:43 2014 -0800
@@ -43,7 +43,11 @@
 # dotest TESTNAME [TARGETNODE]
 
     testcase=$1
-    target="$2"
+    shift
+    target="$1"
+    if [ $# -gt 0 ]; then
+        shift
+    fi
     targetnode=""
     desccall=""
     cd $testcase
@@ -63,10 +67,10 @@
 
     if [ -n "$target" ]; then
         echo "## pushing \"$target\"" from main to pushdest
-        hg -R main push -r "$desccall" pushdest
+        hg -R main push -r "$desccall" $@ pushdest
     else
         echo "## pushing from main to pushdest"
-        hg -R main push pushdest
+        hg -R main push pushdest $@
     fi
     echo "## post push state"
     echo "# obstore: main"
@@ -77,10 +81,10 @@
     hg -R pulldest debugobsolete
     if [ -n "$target" ]; then
         echo "## pulling \"$targetnode\"" from main into pulldest
-        hg -R pulldest pull -r $targetnode main
+        hg -R pulldest pull -r $targetnode $@ main
     else
         echo "## pulling from main into pulldest"
-        hg -R pulldest pull main
+        hg -R pulldest pull main $@
     fi
     echo "## post pull state"
     echo "# obstore: main"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-exchange-A3.t	Mon Mar 03 14:59:43 2014 -0800
@@ -0,0 +1,232 @@
+
+Initial setup
+
+  $ . $TESTDIR/_exc-util.sh
+
+=== A.3 new branch created ===
+
+.. {{{
+..   B' ○⇢ø B
+..      | |
+..      \Aø⇠◔ A'
+..       \|/
+..        ● O
+.. }}}
+..
+.. Marker exist from:
+..
+..  * `Aø⇠○ A'`
+..  * `Bø⇠○ B'`
+..
+.. Command run:
+..
+..  * hg push -r A
+..
+.. Expected exchange:
+..
+..  * chain from A
+..
+.. Expected Exclude:
+..
+..  * chain from B
+..
+.. Extra note:
+..
+.. If A and B are remontly known, we should expect:
+..
+..  * `hg push` will complain about the new head
+..  * `hg push` should complain about unstable history creation
+
+initial
+
+  $ setuprepos A.3.a
+  creating test repo for test case A.3.a
+  - pulldest
+  - main
+  - pushdest
+  cd into `main` and proceed with env setup
+  $ cd main
+  $ mkcommit A0
+  $ mkcommit B0
+  $ hg update -q 0
+  $ mkcommit A1
+  created new head
+  $ hg update -q 0
+  $ mkcommit B1
+  created new head
+  $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
+  $ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(B1)'`
+  $ hg log -G --hidden
+  @  f6298a8ac3a4 (draft): B1
+  |
+  | o  e5ea8f9c7314 (draft): A1
+  |/
+  | x  6e72f0a95b5e (draft): B0
+  | |
+  | x  28b51eb45704 (draft): A0
+  |/
+  o  a9bdc8b26820 (public): O
+  
+  $ hg debugobsolete
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  $ cd ..
+  $ cd ..
+
+Actual Test for first version (changeset unknown remotly)
+---------------------------------------------------------
+
+  $ dotest A.3.a A1
+  ## Running testcase A.3.a
+  # testing echange of "A1" (e5ea8f9c7314)
+  ## initial state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  # obstore: pulldest
+  ## pushing "A1" from main to pushdest
+  pushing to pushdest
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  OBSEXC: computing relevant nodes
+  OBSEXC: computing markers relevant to 2 nodes
+  OBSEXC: encoding 1 markers
+  OBSEXC: sending 1 pushkey payload (78 bytes)
+  OBSEXC: DONE
+  ## post push state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  # obstore: pulldest
+  ## pulling "e5ea8f9c7314" from main into pulldest
+  pulling from main
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  OBSEXC: pull obsolescence markers
+  OBSEXC: merging obsolescence markers (62 bytes)
+  OBSEXC: 1 markers added
+  OBSEXC: DONE
+  (run 'hg update' to get a working copy)
+  ## post pull state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  # obstore: pulldest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+
+
+other variant: changeset know remotly
+-------------------------------------------
+
+  $ setuprepos A.3.b
+  creating test repo for test case A.3.b
+  - pulldest
+  - main
+  - pushdest
+  cd into `main` and proceed with env setup
+  $ cd main
+  $ mkcommit A0
+  $ mkcommit B0
+  $ hg push -q ../pushdest
+  $ hg push -q ../pulldest
+  $ hg update -q 0
+  $ mkcommit A1
+  created new head
+  $ hg update -q 0
+  $ mkcommit B1
+  created new head
+  $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
+  $ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(B1)'`
+  $ hg log -G --hidden
+  @  f6298a8ac3a4 (draft): B1
+  |
+  | o  e5ea8f9c7314 (draft): A1
+  |/
+  | x  6e72f0a95b5e (draft): B0
+  | |
+  | x  28b51eb45704 (draft): A0
+  |/
+  o  a9bdc8b26820 (public): O
+  
+  $ hg debugobsolete
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  $ cd ..
+  $ cd ..
+
+Actual Test for first version (changeset unknown remotly)
+---------------------------------------------------------
+
+check it complains about multiple heads
+
+  $ cd A.3.b
+  $ hg push -R main -r e5ea8f9c7314 pushdest
+  pushing to pushdest
+  searching for changes
+  abort: push creates new remote head e5ea8f9c7314!
+  (merge or see "hg help push" for details about pushing new heads)
+  [255]
+  $ cd ..
+
+test obsmarkers exchange.
+
+  $ dotest A.3.b A1 -f
+  ## Running testcase A.3.b
+  # testing echange of "A1" (e5ea8f9c7314)
+  ## initial state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  # obstore: pulldest
+  ## pushing "A1" from main to pushdest
+  pushing to pushdest
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files (+1 heads)
+  OBSEXC: computing relevant nodes
+  OBSEXC: computing markers relevant to 2 nodes
+  OBSEXC: encoding 1 markers
+  OBSEXC: sending 1 pushkey payload (78 bytes)
+  OBSEXC: DONE
+  ## post push state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  # obstore: pulldest
+  ## pulling "e5ea8f9c7314" from main into pulldest
+  pulling from main
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 2 files (+1 heads)
+  OBSEXC: pull obsolescence markers
+  OBSEXC: merging obsolescence markers (62 bytes)
+  OBSEXC: 1 markers added
+  OBSEXC: DONE
+  (run 'hg heads' to see heads, 'hg merge' to merge)
+  1 new unstable changesets
+  ## post pull state
+  # obstore: main
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {'date': '', 'user': 'test'}
+  # obstore: pushdest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}
+  # obstore: pulldest
+  28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 {'date': '', 'user': 'test'}