来自 DynamoDB Documentclient 的模拟承诺：请求中包含的安全令牌无效

Question

我正在使用 aws-sdk-mock 为 aws-dynamodb 运行一些单元测试用例。 但我得到以下错误：

UnrecognizedClientException：请求中包含的安全令牌无效

这是我的代码的样子。

// Code:
async getUser(email) {
    const params = {
      TableName: 'test',
      Key: {
        email: email
      }
    };
    return await docClient.get(params).promise();
}

这是我当前的测试的样子：

// Testcase:
it('Get all categories data successfully', async done => {
      AWSMock.setSDKInstance(AWS);
      AWSMock.mock('DynamoDB.DocumentClient', 'get', (params, callback) => {
        callback(null, { Item: { 
            email: 'test@test.com',
            name: 'Test profile'
          }
        });
      });
      const response = await service.getUserProfile(eventStub.headers.email);
      expect(response).to.equal({Items: { 
            email: 'test@test.com',
            name: 'Test profile'
          }});;
      AWSMock.restore('DynamoDB.DocumentClient');
      done();
});

UnrecognizedClientException: The security token included in the request is invalid

      at Request.extractError (node_modules/aws-sdk/lib/protocol/json.js:51:27)
      at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:106:20)
      at Request.emit (node_modules/aws-sdk/lib/sequential_executor.js:78:10)
      at Request.emit (node_modules/aws-sdk/lib/request.js:683:14)
      at Request.transition (node_modules/aws-sdk/lib/request.js:22:10)
      at AcceptorStateMachine.runTo (node_modules/aws-sdk/lib/state_machine.js:14:12)
      at node_modules/aws-sdk/lib/state_machine.js:26:10
      at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:38:9)
      at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:685:12)
      at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:116:18)
      at Request.emit (node_modules/aws-sdk/lib/sequential_executor.js:78:10)
      at Request.emit (node_modules/aws-sdk/lib/request.js:683:14)
      at Request.transition (node_modules/aws-sdk/lib/request.js:22:10)
      at AcceptorStateMachine.runTo (node_modules/aws-sdk/lib/state_machine.js:14:12)
      at node_modules/aws-sdk/lib/state_machine.js:26:10
      at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:38:9)
      at Request.<anonymous> (node_modules/aws-sdk/lib/request.js:685:12)
      at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:116:18)
      at callNextListener (node_modules/aws-sdk/lib/sequential_executor.js:96:12)
      at IncomingMessage.onEnd (node_modules/aws-sdk/lib/event_listeners.js:307:13)

Answer 1

我知道这是一个迟到的答案，但为了其他任何发现这个问题的人：

根据 aws-sdk-mock自述文件，请参阅实例化 AWS 服务示例部分。 AWS 服务需要在被测试的函数中实例化。

从自述文件：

注意：AWS 服务需要在被测试的函数中初始化，以便模拟 SDK 方法，例如，对于 AWS Lambda 函数，示例 1 将导致配置中未定义的错误区域，而在示例 2 中，SDK 将被成功模拟.

在您的示例中，您可能需要这样做：

async getUser(email) {
  // instantiate the service inside the function being tested in order for aws-sdk-mock
  // to mock it successfully
  if(process.env.NODE_ENV === 'test')
    docClient = new AWS.DynamoDB.DocumentClient()

  const params = {
    TableName: 'test',
    Key: {
      email: email
    }
  }
  return docClient.get(params).promise()
}

我也犯了这个错误。 希望这可以帮助。