test: add swagger check to smoke tests

scripts/test/emqx-smoke-test.sh

@@ -8,6 +8,7 @@ IP=$1
 PORT=$2
 URL="http://$IP:$PORT/status"
 
+## Check if EMQX is responding
 ATTEMPTS=10
 while ! curl "$URL" >/dev/null 2>&1; do
     if [ $ATTEMPTS -eq 0 ]; then
@@ -17,3 +18,23 @@ while ! curl "$URL" >/dev/null 2>&1; do
     sleep 5
     ATTEMPTS=$((ATTEMPTS-1))
 done
+
+## Check if the API docs are available
+API_DOCS_URL="http://$IP:$PORT/api-docs/index.html"
+API_DOCS_STATUS="$(curl -s -o /dev/null -w "%{http_code}" "$API_DOCS_URL")"
+if [ "$API_DOCS_STATUS" != "200" ]; then
+    echo "emqx is not responding on $API_DOCS_URL"
+    exit 1
+fi
+
+## Check if the swagger.json contains hidden fields
+## fail if it does
+SWAGGER_JSON_URL="http://$IP:$PORT/api-docs/swagger.json"
+## assert swagger.json is valid json
+JSON="$(curl -s "$SWAGGER_JSON_URL")"
+echo "$JSON" | jq . >/dev/null
+## assert swagger.json does not contain trie_compaction (which is a hidden field)
+if echo "$JSON" | grep -q trie_compaction; then
+    echo "swagger.json contains hidden fields"
+    exit 1
+fi