stringified JSON is parsed offline, stringified online

[frsechet]

It appears serverless-offline is parsing a stringified JSON response of a lambda integration, hence giving a different result online vs. offline.

Considering the following function:

module.exports.hello = async (event) => {
  return JSON.stringify({ toto: "tutu" });
};

And the following serverless.yml:

service: testjson

plugins:
  - serverless-offline

provider:
  name: aws
  runtime: nodejs10.x
  stage: dev
  region: eu-west-3

functions:
  hello:
    handler: handler.hello
    events:
      - http:
          path: test
          method: GET
          integration: lambda
          cors: true

When running locally, I get:

$ curl http://localhost:3000/test
{"toto":"tutu"}

When deployed, I get:

$ curl https://whatever.execute-api.eu-west-3.amazonaws.com/dev/test
"{\"toto\":\"tutu\"}"

However, if I change the function to:

module.exports.hello = async (event) => {
  return { toto: "tutu" };
};

I get {"toto":"tutu"} everywhere (as expected).

[arnas]

Hello,
I will look into this issue