Javascript aws sdk模拟模拟s3.putBucketPolicy不起作用

我想测试这个函数

async function PutBucketPolicy(putBucketPolicyParams) {
  logger.debug("---- PutBucketPolicy");
  return new Promise(async(resolve, reject) => {

    s3.putBucketPolicy(putBucketPolicyParams, function(err, data) {
      if (err)
      {
        resolve(err);
        logger.debug("Error occured!");
        logger.debug(err, err.stack); // an error occurred
      }
      else
      {
        resolve(data);
        logger.debug("Data: ", data);
        logger.debug(data); // successful response
      }
    });
  });
}

我想如何测试它：

describe("Testing PutBucketPolicy function", () => {
  describe("when called with a valid bucket policy object and an event then it", () => {
    it("sets the bucket policy through an aws call.", async() => {

      AWSMock.mock("S3","putBucketPolicy",{ "Body": Buffer.from("somestring") });

      const result = await PutBucketPolicy(helper.putBucketPolicyParams);
      expect( result).toMatchObject(helper.resultPolicyObject);

      AWSMock.restore('S3');

    });
  });
});

问题是它总是返回[ExpiredToken:提供的令牌已过期。]，因为模拟本身不起作用，它试图离开internet并执行s3.putBucketPolicy函数

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我是新来的。我应该怎么做才能让它工作？

您需要在要测试的方法中初始化S3客户端，如中所述

注意：AWS服务需要在正在运行的函数内初始化 测试以模拟SDK方法，例如针对AWS Lambda 函数示例1将导致配置中未定义错误区域 而在示例2中，sdk将被成功模拟

例1：

例2

还要注意，如果您初始化 AWS服务位于从 处理程序函数，这也不起作用

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我已经将其添加到函数中：consts3=newaws.s3（{apiVersion:'2006-03-01'}）；并将其放入测试函数：consts3=newaws.s3（{paramValidation:true}）；现在它开始工作了。谢谢

const AWS      = require('aws-sdk');
const sns      = AWS.SNS();
const dynamoDb = AWS.DynamoDB();

exports.handler = function(event, context) {
  // do something with the services e.g. sns.publish
}

const AWS = require('aws-sdk');

exports.handler = function(event, context) {
  const sns      = AWS.SNS();
  const dynamoDb = AWS.DynamoDB();
  // do something with the services e.g. sns.publish
}