tests/test-mq-strip

convert/svn: make sink recover gracefully from empty changeset

Otherwise when processing a changeset that in fact changes no files
(perhaps due to bug in import from CVS) can get something like:
  unexpected svn output:
  abort: unable to cope with svn output

Bug report and patch draft by Jesse Glick <[e-mail]>

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

teststrip() {
    hg up -C $1
    echo % before update $1, strip $2
    hg parents
    hg strip $2 2>&1 | sed 's/\(saving bundle to \).*/\1/'
    echo % after update $1, strip $2
    hg parents
    hg unbundle -q .hg/strip-backup/*
    rm .hg/strip-backup/*
}

hg init test
cd test

echo foo > bar
hg ci -Ama

echo more >> bar
hg ci -Amb

echo blah >> bar
hg ci -Amc

hg up 1
echo blah >> bar
hg ci -Amd

echo final >> bar
hg ci -Ame

hg log

teststrip 4 4
teststrip 4 3
teststrip 1 4
teststrip 4 2
teststrip 4 1
teststrip null 4

hg log

hg up -C 2
hg merge 4
echo % before strip of merge parent
hg parents
hg strip 4 2>&1 | sed 's/\(saving bundle to \).*/\1/'
echo % after strip of merge parent
hg parents