made #125 more robust

Author: adrai

index.js

@@ -52,13 +52,13 @@ module.exports = (app, options) => {
       } else if (event.queryStringParameters) {
         Object.keys(event.queryStringParameters).forEach((q) => {
           query[decodeURIComponent(q)] = decodeURIComponent(event.queryStringParameters[q])
-          if (typeof query[decodeURIComponent(q)] === 'string' && query[decodeURIComponent(q)].indexOf(',') > 0) {
+          if (event.version === '2.0' && typeof query[decodeURIComponent(q)] === 'string' && query[decodeURIComponent(q)].indexOf(',') > 0) {
             query[decodeURIComponent(q)] = query[decodeURIComponent(q)].split(',')
           }
         })
       }
     } else {
-      if (event.queryStringParameters) {
+      if (event.queryStringParameters && event.version === '2.0') {
         Object.keys(event.queryStringParameters).forEach((k) => {
           if (typeof event.queryStringParameters[k] === 'string' && event.queryStringParameters[k].indexOf(',') > 0) {
             event.queryStringParameters[k] = event.queryStringParameters[k].split(',')

test/basic.test.js

@@ -194,6 +194,7 @@ test('GET with multi-value query params (queryStringParameters)', async (t) => {
   const proxy = awsLambdaFastify(app)
 
   const ret = await proxy({
+    version: '2.0',
     httpMethod: 'GET',
     path: '/test',
     queryStringParameters: {