Side effects when creating 2 consecutive events

[piercus]

I think createEvent function is having side-effect

Scenario

  const createEvent = require('aws-event-mocks');
  
  const event1 = createEvent({
    template: 'aws:s3',
    merge: {
      Records: [{
        eventName: 'ObjectCreated:Put',
        s3: {
          bucket: {
            name: 'bucket1'
          },
          object: {
            key: 'key1'
          }
        }
      }]
    }
  });

  const event2 = createEvent({
    template: 'aws:s3',
    merge: {
      Records: [{
        eventName: 'ObjectCreated:Put',
        s3: {
          bucket: {
            name: 'bucket1'
          },
          object: {
            key: 'key2'
          }
        }
      }]
    }
  });

  console.log(event1.Records[0].s3.object.key);
  // return 'key2'

Expected

I would expect to return 'key1'