eclass/tests: Add tests for unpacker.eclass

Signed-off-by: Michał Górny <mgorny@gentoo.org>

2 files changed, 240 insertions, 0 deletions

diff --git a/eclass/tests/tests-common.sh b/eclass/tests/tests-common.sh
index a677842b6ac5..45b1e20b933a 100644
--- a/eclass/tests/tests-common.sh
+++ b/eclass/tests/tests-common.sh
@@ -60,6 +60,13 @@ die() {
 	exit 1
 }
 
+assert() {
+	local x pipestatus=${PIPESTATUS[*]}
+	for x in ${pipestatus} ; do
+		[[ ${x} -eq 0 ]] || die "$@"
+	done
+}
+
 has_version() {
 	while [[ $1 == -* ]]; do
 		shift
diff --git a/eclass/tests/unpacker.sh b/eclass/tests/unpacker.sh
new file mode 100755
index 000000000000..7a297d61babd
--- /dev/null
+++ b/eclass/tests/unpacker.sh
@@ -0,0 +1,233 @@
+#!/usr/bin/env bash
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+source tests-common.sh || exit
+
+inherit unpacker
+
+# silence the output
+unpack_banner() { :; }
+
+TESTFILE=test.in
+TESTDIR=$(mktemp -d || die)
+trap 'cd - >/dev/null && rm -r "${TESTDIR}"' EXIT
+
+# prepare some test data
+# NB: we need something "compressible", as compress(1) will return
+# an error if the file "is larger than before compression"
+cp ../unpacker.eclass "${TESTDIR}/${TESTFILE}" || die
+cd "${TESTDIR}" || die
+
+test_unpack() {
+	local archive=${1}
+	local unpacked=${2}
+	local deps=${3}
+	local packcmd=${4}
+
+	local x
+	for x in ${deps}; do
+		if ! type "${x}" &>/dev/null; then
+			ewarn "Skipping ${archive}, tool ${x} not found"
+			return
+		fi
+	done
+
+	rm -rf testdir || die
+	mkdir -p testdir || die
+
+	tbegin "unpacking ${archive}"
+	eval "${packcmd}"
+	assert "packing ${archive} failed"
+	cd testdir || die
+	local out
+	out=$(
+		_unpacker "../${archive}" 2>&1
+	)
+	ret=$?
+	if [[ ${ret} -eq 0 ]]; then
+		if [[ ! -f ${unpacked} ]]; then
+			eerror "${unpacked} not found after unpacking"
+			ret=1
+		elif ! diff -u "${unpacked}" "../${TESTFILE}"; then
+			eerror "${unpacked} different than input"
+			ret=1
+		fi
+	fi
+	[[ ${ret} -ne 0 ]] && echo "${out}" >&2
+	tend ${ret}
+
+	cd .. || die
+	rm -f "${archive}" || die
+}
+
+test_compressed_file() {
+	local suffix=${1}
+	local tool=${2}
+
+	test_unpack "test${suffix}" test "${tool}" \
+		"${tool} -c \${TESTFILE} > \${archive}"
+}
+
+test_compressed_file_multistream() {
+	local suffix=${1}
+	local tool=${2}
+
+	test_unpack "test+multistream${suffix}" "test+multistream" "${tool}" \
+		"head -n 300 \${TESTFILE} | ${tool} -c > \${archive} &&
+		tail -n +301 \${TESTFILE} | ${tool} -c >> \${archive}"
+}
+
+test_compressed_file_with_junk() {
+	local suffix=${1}
+	local tool=${2}
+	local flag=${3}
+
+	test_unpack "test+junk${suffix}" "test+junk" "${tool}" \
+		"${tool} -c \${TESTFILE} > \${archive} && cat test.in >> \${archive}"
+}
+
+test_compressed_tar() {
+	local suffix=${1}
+	local tool=${2}
+
+	test_unpack "test${suffix}" test.in "tar ${tool}" \
+		"tar -c \${TESTFILE} | ${tool} -c > \${archive}"
+}
+
+test_compressed_cpio() {
+	local suffix=${1}
+	local tool=${2}
+
+	test_unpack "test${suffix}" test.in "cpio ${tool}" \
+		"cpio -o --quiet <<<\${TESTFILE} | ${tool} -c > \${archive}"
+}
+
+create_deb() {
+	local suffix=${1}
+	local tool=${2}
+	local archive=${3}
+	local infile=${4}
+
+	echo 2.0 > debian-binary || die
+	: > control || die
+	tar -cf control.tar control || die
+	tar -c "${infile}" | ${tool} > "data.tar${suffix}"
+	assert "packing data.tar${suffix} failed"
+	ar r "${archive}" debian-binary control.tar "data.tar${suffix}" \
+		2>/dev/null || die
+	rm -f control control.tar "data.tar${suffix}" debian-binary || die
+}
+
+test_deb() {
+	local suffix=${1}
+	local tool=${2}
+	local tool_cmd
+
+	if [[ -n ${tool} ]]; then
+		tool_cmd="${tool} -c"
+	else
+		tool_cmd=cat
+	fi
+
+	test_unpack "test-${tool}_1.2.3_noarch.deb" test.in "ar tar ${tool}" \
+		"create_deb '${suffix}' '${tool_cmd}' \${archive} \${TESTFILE}"
+}
+
+test_reject_junk() {
+	local suffix=${1}
+	local archive=test${1}
+
+	rm -rf testdir || die
+	mkdir -p testdir || die
+
+	tbegin "rejecting junk named ${archive}"
+	cat test.in >> "${archive}" || die
+	cd testdir || die
+	(
+		# some decompressors (e.g. cpio) are very verbose about junk
+		_unpacker "../${archive}" &>/dev/null
+	)
+	[[ $? -ne 0 ]]
+	ret=$?
+	tend ${ret}
+
+	cd .. || die
+	rm -f "${archive}" || die
+}
+
+test_compressed_file .bz2 bzip2
+test_compressed_file .Z compress
+test_compressed_file .gz gzip
+test_compressed_file .lzma lzma
+test_compressed_file .xz xz
+test_compressed_file .lz lzip
+test_compressed_file .zst zstd
+
+test_compressed_file_multistream .bz2 bzip2
+test_compressed_file_multistream .gz gzip
+test_compressed_file_multistream .xz xz
+test_compressed_file_multistream .lz lzip
+test_compressed_file_multistream .zst zstd
+
+test_compressed_file_with_junk .bz2 bzip2
+test_compressed_file_with_junk .lz lzip
+
+test_unpack test.tar test.in tar 'tar -cf ${archive} ${TESTFILE}'
+test_compressed_tar .tar.bz2 bzip2
+test_compressed_tar .tbz bzip2
+test_compressed_tar .tbz2 bzip2
+test_compressed_tar .tar.Z compress
+test_compressed_tar .tar.gz gzip
+test_compressed_tar .tgz gzip
+test_compressed_tar .tar.lzma lzma
+test_compressed_tar .tar.xz xz
+test_compressed_tar .txz xz
+test_compressed_tar .tar.lz lzip
+test_compressed_tar .tar.zst zstd
+
+test_unpack test.cpio test.in cpio 'cpio -o --quiet <<<${TESTFILE} > ${archive}'
+test_compressed_cpio .cpio.bz2 bzip2
+test_compressed_cpio .cpio.Z compress
+test_compressed_cpio .cpio.gz gzip
+test_compressed_cpio .cpio.lzma lzma
+test_compressed_cpio .cpio.xz xz
+test_compressed_cpio .cpio.lz lzip
+test_compressed_cpio .cpio.zst zstd
+
+test_deb
+test_deb .gz gzip
+test_deb .xz xz
+test_deb .bz2 bzip2
+test_deb .lzma lzma
+
+test_unpack test.zip test.in zip 'zip -q ${archive} ${TESTFILE}'
+# test handling non-adjusted zip with junk prepended
+test_unpack test.zip test.in zip \
+	'zip -q testdir/tmp.zip ${TESTFILE} && cat test.in testdir/tmp.zip > ${archive}'
+test_unpack test.7z test.in 7z '7z -bso0 a ${archive} ${TESTFILE}'
+test_unpack test.lha test.in lha 'lha a -q ${archive} ${TESTFILE}'
+test_unpack test.lzh test.in lha 'lha a -q ${archive} ${TESTFILE}'
+test_unpack test.rar test.in rar 'rar -idq a ${archive} ${TESTFILE}'
+
+# TODO: .run/.sh/.bin
+
+test_reject_junk .bz2
+test_reject_junk .Z
+test_reject_junk .gz
+test_reject_junk .lzma
+test_reject_junk .xz
+test_reject_junk .lz
+test_reject_junk .zst
+test_reject_junk .tar
+test_reject_junk .cpio
+test_reject_junk .deb
+test_reject_junk .zip
+test_reject_junk .7z
+test_reject_junk .rar
+test_reject_junk .lha
+test_reject_junk .lzh
+
+texit