feat: add api test

Signed-off-by: Xinwei Xiong(cubxxw) <3293172751nss@gmail.com>

scripts/lib/color.sh

@@ -70,8 +70,7 @@ ITALIC_PREFIX="\033[3m"     # Italic prefix
 CYAN_PREFIX="\033[0;36m"     # Cyan prefix
 
 # Print colors you can use
-openim::color::print_color()
-{
+openim::color::print_color() {
   echo
   echo -e ${bmagenta}--back-color:${normal}
   echo "bblack; bgreen; bblue; bcyan; bred; byellow; bmagenta; bwhite"

scripts/lib/logging.sh

@@ -200,8 +200,7 @@ openim::log::status() {
   done
 }
 
-openim::log::success()
-{
+openim::log::success() {
   local V="${V:-0}"
   if [[ ${OPENIM_VERBOSE} < ${V} ]]; then
       return

scripts/lib/util.sh

@@ -1126,6 +1126,21 @@ function openim::util::require-jq {
   fi
 }
 
+# openim::util::require-dig
+# Checks whether dig is installed and provides installation instructions if it is not.
+function openim::util::require-dig {
+  if ! command -v dig &>/dev/null; then
+    echo "dig command not found."
+    echo "Please install 'dig' to use this feature."
+    echo "Installation instructions:"
+    echo "  For Ubuntu/Debian: sudo apt-get install dnsutils"
+    echo "  For CentOS/RedHat: sudo yum install bind-utils"
+    echo "  For macOS: 'dig' should be preinstalled. If missing, try: brew install bind"
+    echo "  For Windows: Install BIND9 tools from https://www.isc.org/download/"
+    return 1
+  fi
+}
+
 # outputs md5 hash of $1, works on macOS and Linux
 function openim::util::md5() {
   if which md5 >/dev/null 2>&1; then