add test_local.sh

tests/test_local.sh

+#!/bin/sh
+
+func()
+{
+	echo "1"
+	echo "2"
+	echo "3"
+}
+
+test_func()
+{
+	local var=$(func)
+	echo "$var"
+}
+
+test_func
+[ "$(test_func)" = "1 2 3" ] || echo "Error with local!"
+