#!/bin/bash

[ -f testing.sh ] && . testing.sh

#testing "name" "command" "result" "infile" "stdin"

echo -e 'a\nb\nc'> lhs
for i in c d e ; do echo $i >> rhs ; done
testing "comm" "comm lhs input" "a\nb\n\t\tc\n\td\n\te\n" "c\nd\ne\n" ""
testing "comm -" "comm - input" "a\nb\n\t\tc\n\td\n\te\n" "c\nd\ne\n" "a\nb\nc\n"
testing "comm -123 detects missing" "comm - missing 2>/dev/null || echo here" \
  "here\n" "" ""