urchin/tests/Exit on fail if -e is passed.

tmp=$(mktemp)
../urchin -e -f ./.die-on-fail > $tmp
result=$?

grep '1 should run.' $tmp
grep '2 should run.' $tmp
grep -v '3 should not run.' $tmp
grep -v '4 should not run.' $tmp

rm $tmp
exit $result