change to add test file..

test/docker-in-docker/dockerIp6tablesEnabledTest.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+ip6tablesCheck() {
+    if command -v ip6tables > /dev/null 2>&1; then
+        if ip6tables -L > /dev/null 2>&1; then
+            echo "✔️ ip6tables is enabled."
+        else
+            echo "❌ ip6tables is disabled."
+        fi
+    else
+        echo "❕ip6tables command not found. ❕"
+    fi
+}
+
+check "ip6tables" ip6tablesCheck
+
+reportResults