tests/test-hgcia

branch heads: fix regression introduced in e67e5b60e55f (issue1726)

For merge nodes it is not adequate to only check a single possible
branch head for whether it is an ancestor of the latest head, but it
needs to be done for each possible branch head.

#!/bin/sh

cat >> $HGRCPATH <<EOF
[extensions]
hgcia=

[hooks]
changegroup.cia = python:hgext.hgcia.hook

[cia]
user = testuser
project = testproject
test = True
EOF

hg init src
hg init cia

cd src
echo foo > foo
hg ci -Amfoo

hg push ../cia