Add test script for shell scripts

test/error

@@ -0,0 +1,4 @@
+./test_script.bash
+./test_script.bash
+./test_script.bash
+./test_script.bash

test/test_script.bash

@@ -0,0 +1,25 @@
+#!/bin/bash -xv
+# SPDX-FileCopyrightText: 2023 Ryuichi Ueda ryuichiueda@gmail.com
+# SPDX-License-Identifier: BSD-3-Clause
+
+err () {
+	echo $0 >> ./error
+	echo "ERROR!" FILE: $0, LINENO: $1
+	exit 1
+}
+
+tmp=/tmp/$$
+
+[ "$1" == "nobuild" ] || cargo build --release || err $LINENO
+
+cd $(dirname $0)
+com=../target/release/sush
+
+LANG=C ./lineno.bash 2> $tmp-bash
+LANG=C ./lineno.sush 2> $tmp-sush
+
+sed 's/sush/bash/g' $tmp-sush |
+diff $tmp-bash - || err $LINENO
+
+
+echo $0 >> ./ok