How to mock bulk method

[kksarma]

Hi, I am trying to mock the bulk method but it is returning the following error:

import { Client } from '@elastic/elasticsearch';
import ElasticMock from '@elastic/elasticsearch-mock';

const esResponse = { took: 9, errors: false };

const mock = new ElasticMock();
const client = new Client({
  node: 'http://localhost:9200/',
  Connection: mock.getConnection()
});

mock.add({
  method: 'POST',
  path: '/_bulk'
}, () => esResponse);

let response;
try {
  response = await client.bulk({ body: [{ foo: 'bar' }, { baz: 'fa\nz' }] });
  console.log(response);
} catch (error) {
  console.log(error);
  response = { body: {} };
}

ResponseError: Response Error
          at onBody (/Users/krishankant/Public/Work/fw-bt-3ds-metrics-lambda/node_modules/@elastic/elasticsearch/lib/Transport.js:349:23)
          at Class.onEnd (/Users/krishankant/Public/Work/fw-bt-3ds-metrics-lambda/node_modules/@elastic/elasticsearch/lib/Transport.js:275:11)
          at Class.emit (events.js:223:5)
          at endReadableNT (/Users/krishankant/Public/Work/fw-bt-3ds-metrics-lambda/node_modules/readable-stream/lib/_stream_readable.js:1010:12)
          at processTicksAndRejections (internal/process/task_queues.js:81:21) {
        name: 'ResponseError',
        meta: {
          body: { error: 'Mock not found' },
          statusCode: 404,
          headers: {
            'content-type': 'application/json;utf=8',
            date: '2021-08-16T12:09:51.899Z',
            connection: 'keep-alive',
            'content-length': 26
          },
          meta: {
            context: null,
            request: [Object],
            name: 'elasticsearch-js',
            connection: [Object],
            attempts: 0,
            aborted: false
          }
        }
      }

Can anyone help me to resolve this issue?

[iamEAP]

I ran into this and was able to find the underlying missing mock by digging deeper into the returned error. In the above example, logging error.meta.meta.request showed the mock (path, method) that needed to be implemented.

In my case, it ended up being a GET /:index/_refresh call, but I imagine, depending on the operation, the missing request mock could be different.