tests/test-ssh

Fix hg push and hg push -r sometimes creating new heads without --force.
Fixing issue179.

The algorithm checks if there not more new heads on the remote side than heads
which become non-heads due to getting children.

Pushing this repo:
    m
   /\
3 3a|
|/  /
2 2a
|/
1

to a repo only having 1, 2 and 3 didn't abort requiring --force before.

Added test cases for this and some doc strings for used methods.

#!/bin/sh

# This test tries to exercise the ssh functionality with a dummy script

cat <<'EOF' > dummyssh
#!/bin/sh
# this attempts to deal with relative pathnames
cd `dirname $0`

# check for proper args
if [ $1 != "user@dummy" ] ; then
	exit -1
fi

# check that we're in the right directory
if [ ! -x dummyssh ] ; then
	exit -1
fi

echo Got arguments 1:$1 2:$2 3:$3 4:$4 5:$5 >> dummylog
$2
EOF
chmod +x dummyssh

echo "# creating 'remote'"
hg init remote
cd remote
echo this > foo
hg ci -A -m "init" -d "1000000 0" foo

cd ..

echo "# clone remote"
hg clone -e ./dummyssh ssh://user@dummy/remote local

echo "# verify"
cd local
hg verify

echo "# empty default pull"
hg paths
hg pull -e ../dummyssh

echo "# local change"
echo bleah > foo
hg ci -m "add" -d "1000000 0"

echo "# updating rc"
echo "default-push = ssh://user@dummy/remote" >> .hg/hgrc
echo "[ui]" >> .hg/hgrc
echo "ssh = ../dummyssh" >> .hg/hgrc

echo "# find outgoing"
hg out ssh://user@dummy/remote

echo "# find incoming on the remote side"
hg incoming -R ../remote -e ../dummyssh ssh://user@dummy/local

echo "# push"
hg push

cd ../remote

echo "# check remote tip"
hg tip
hg verify
hg cat foo

cd ..
cat dummylog