#!/bin/sh

FPREFIX="tmp-tml"

set -e

remove () {
    rm $FPREFIX*
}

trap remove EXIT

set -x

datagen -s1        > ${FPREFIX}1 2> $FPREFIX-trash
datagen -s2 -g100K > ${FPREFIX}2 2> $FPREFIX-trash
datagen -s3 -g200K > ${FPREFIX}3 2> $FPREFIX-trash
# compress multiple files : one .lz4 per source file
lz4 -f -m $FPREFIX*
test -f ${FPREFIX}1.lz4
test -f ${FPREFIX}2.lz4
test -f ${FPREFIX}3.lz4
# decompress multiple files : one output file per .lz4
mv ${FPREFIX}1 ${FPREFIX}1-orig
mv ${FPREFIX}2 ${FPREFIX}2-orig
mv ${FPREFIX}3 ${FPREFIX}3-orig
lz4 -d -f -m $FPREFIX*.lz4
cmp ${FPREFIX}1 ${FPREFIX}1-orig   # must be identical
cmp ${FPREFIX}2 ${FPREFIX}2-orig
cmp ${FPREFIX}3 ${FPREFIX}3-orig
# compress multiple files into stdout
cat ${FPREFIX}1.lz4 ${FPREFIX}2.lz4 ${FPREFIX}3.lz4 > $FPREFIX-concat1
rm $FPREFIX*.lz4
lz4 -m ${FPREFIX}1 ${FPREFIX}2 ${FPREFIX}3 -c > $FPREFIX-concat2
test ! -f ${FPREFIX}1.lz4  # must not create .lz4 artefact
cmp $FPREFIX-concat1 $FPREFIX-concat2  # must be equivalent
# decompress multiple files into stdout
rm $FPREFIX-concat1 $FPREFIX-concat2
lz4 -f -m ${FPREFIX}1 ${FPREFIX}2 ${FPREFIX}3   # generate .lz4 to decompress
cat ${FPREFIX}1 ${FPREFIX}2 ${FPREFIX}3 > $FPREFIX-concat1   # create concatenated reference
rm ${FPREFIX}1 ${FPREFIX}2 ${FPREFIX}3
lz4 -d -m ${FPREFIX}1.lz4 ${FPREFIX}2.lz4 ${FPREFIX}3.lz4 -c > $FPREFIX-concat2
test ! -f ${FPREFIX}1  # must not create file artefact
cmp $FPREFIX-concat1 $FPREFIX-concat2  # must be equivalent
# compress multiple files, one of which is absent (must fail)
lz4 -f -m $FPREFIX-concat1 notHere $FPREFIX-concat2 && exit 1 # must fail : notHere not present
# test lz4-compressed file
rm $FPREFIX-concat1 $FPREFIX-concat2
lz4 -tm $FPREFIX-concat1.lz4
# ensure the test doesn't create artifact
test ! -f $FPREFIX-concat1  # must not create file artefact
# test multiple lz4-compressed file
lz4 -tm $FPREFIX-concat1.lz4 $FPREFIX-concat2.lz4
test ! -f $FPREFIX-concat1  # must not create file artefact
test ! -f $FPREFIX-concat2  # must not create file artefact
# test multiple lz4 files, one of which is absent (must fail)
lz4 -tm $FPREFIX-concat1.lz4 notHere.lz4 $FPREFIX-concat2.lz4 && exit 1
true