#!/bin/sh -e cd ${0%/*} . ./lib.sh plan 2 cat <tmp.1 Subject: message 1 This is message 1. EOF cat <tmp.2 Subject: message 2 This is message 2. It has a trailing empty line. EOF printf >tmp.3 'Subject: message 3 This is message 3. It has a no trailing newline, oops.' mexport ./tmp.1 ./tmp.2 ./tmp.3 >./tmp.mbox check 'generated mbox has 16 lines' 'cat ./tmp.mbox | wc -l | grep 16' check 'generated mbox has 7 empty lines' 'grep -c "^$" ./tmp.mbox | grep 7'