#!/bin/bash

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

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


echo -e "one-A\none-B" > file1 
echo -e "two-A\ntwo-B" > file2
testing "tac" "tac && echo yes" "one-B\none-A\nyes\n" "" "one-A\none-B\n"
testing "tac -" "tac - && echo yes" "one-B\none-A\nyes\n" "" "one-A\none-B\n"
testing "tac file1 file2" "tac file1 file2" "one-B\none-A\ntwo-B\ntwo-A\n"  "" ""
testing "tac - file"      "tac - file1"     "zero-B\nzero-A\none-B\none-A\n" "" "zero-A\nzero-B\n"
testing "tac file -"      "tac file1 -"     "one-B\none-A\nzero-B\nzero-A\n" "" "zero-A\nzero-B\n"

testing "tac file1 notfound file2" \
        "tac file1 notfound file2 2>stderr && echo ok ; tac stderr; rm stderr" \
        "one-B\none-A\ntwo-B\ntwo-A\ntac: notfound: No such file or directory\n" "" ""

testing "tac no trailing newline" "tac -" "defabc\n" "" "abc\ndef"

# xputs used by tac does not propagate this error condition properly. 
#testing "tac > /dev/full" \
#        "tac - > /dev/full 2>stderr && echo ok; cat stderr; rm stderr" \
#        "tac: write: No space left on device\n" "" "zero\n"

# 

rm file1 file2