使用serverless-bundle，我如何对使用sharp包的代码运行测试？

npm install serverless-bundle --save-dev

service: your-service-name

plugins:
  - serverless-bundle

provider:
  name: aws
  runtime: nodejs14.x

functions:
  your-function-name:
    handler: handler.yourFunction
    events:
      - http:
          path: your-path
          method: GET

const sharp = require('sharp');

module.exports.yourFunction = async (event, context) => {
  // 在这里编写你的代码逻辑，使用sharp包进行图像处理等操作
};

npm install sharp

const { yourFunction } = require('./handler');

describe('yourFunction', () => {
  it('should return the expected result', async () => {
    // 在这里编写你的测试逻辑，调用yourFunction并验证返回结果
  });
});

npm test