S3Client.putObject(bucketName, objectKey, data)

import { AWSConfig, S3Client } from 'https://jslib.k6.io/aws/0.11.0/s3.js';

const awsConfig = new AWSConfig({
  region: __ENV.AWS_REGION,
  accessKeyId: __ENV.AWS_ACCESS_KEY_ID,
  secretAccessKey: __ENV.AWS_SECRET_ACCESS_KEY,
});

const s3 = new S3Client(awsConfig);
const testBucketName = 'test-jslib-aws';
const testFileKey = 'bonjour.txt';
const testFile = open('./bonjour.txt', 'r');

export default async function () {
  // Let's upload our test file to the bucket
  await s3.putObject(testBucketName, testFileKey, testFile, {
    contentType: 'text/plain',
    contentLength: testFile.length,
  });

  // And let's redownload it to verify it's correct
  const obj = await s3.getObject(testBucketName, testFileKey);
  console.log(JSON.stringify(obj));
}