eclass/tests/dist-kernel-utils.sh: add compressed_module_cleanup tests

Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>
Closes: https://github.com/gentoo/gentoo/pull/37985
Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>

eclass/tests/dist-kernel-utils.sh

@@ -20,9 +20,68 @@ test_PV_to_KV() {
 	tend $?
 }
 
+test_compressed_module_cleanup() {
+	mkdir -p "${tmpdir}/source" || die
+	pushd "${tmpdir}" >/dev/null || die
+
+	local module option fail=0
+	for option in NONE GZIP XZ ZSTD; do
+		tbegin "CONFIG_MODULE_COMPRESS_${option}"
+		echo "CONFIG_MODULE_COMPRESS_${option}=y" > source/.config
+
+		touch a.ko b.ko.gz c.ko.xz d.ko.gz e.ko f.ko.xz || die
+		# ensure some files are older
+		touch -d "2 hours ago" d.ko e.ko.xz f.ko.gz || die
+
+		IUSE=modules-compress dist-kernel_compressed_module_cleanup .
+
+		local to_keep=( a.ko b.ko.gz c.ko.xz )
+		local to_remove=()
+
+		case ${option} in
+			NONE)
+				to_keep+=( d.ko e.ko f.ko.xz )
+				to_remove+=( d.ko.gz e.ko.xz f.ko.gz )
+				;;
+			GZIP)
+				to_keep+=( d.ko.gz e.ko f.ko.gz )
+				to_remove+=( d.ko e.ko.xz f.ko.xz )
+				;;
+			XZ)
+				to_keep+=( d.ko.gz e.ko.xz f.ko.xz )
+				to_remove+=( d.ko e.ko f.ko.gz )
+				;;
+			ZSTD)
+				to_keep+=( d.ko.gz e.ko f.ko.xz )
+				to_remove+=( d.ko e.ko.xz f.ko.gz )
+				;;
+		esac
+
+		for module in "${to_keep[@]}"; do
+			if [[ ! -f ${module} ]]; then
+				eerror "Module ${module} was removed"
+				fail=1
+			fi
+		done
+
+		for module in "${to_remove[@]}"; do
+			if [[ -f ${module} ]]; then
+				eerror "Module ${module} was not removed"
+				fail=1
+			fi
+		done
+		tend ${fail}
+	done
+
+	popd >/dev/null || die
+}
+
+
 test_PV_to_KV 6.0_rc1 6.0.0-rc1
 test_PV_to_KV 6.0 6.0.0
 test_PV_to_KV 6.0.1_rc1 6.0.1-rc1
 test_PV_to_KV 6.0.1 6.0.1
 
+test_compressed_module_cleanup
+
 texit