jest + axios-mock-adapter connect ECONNREFUSED ::1:80

[yss14]

When using axios-mock-adapter in jest I somehow receive this error after the test passed. It seems like that the mock adapter is working and returns the correct result, but somehow the real http request is somehow executed in the background?

import axios from 'axios'
import MockAdapter from 'axios-mock-adapter'

const userSoeren: User = { id: 42, name: 'Sören' }

test('single client request is executed', async () => {
  const axiosInstance = axios.create()
  const axiosInstanceMock = new MockAdapter(axiosInstance)

  axiosInstanceMock.onGet('/api/users').reply(StatusCodes.OK, [userSoeren])

  const result = await axiosInstance.get('/api/users')
  console.log(result)
  expect(result.data).toEqual<User[]>([userSoeren])
})

  console.log
    {
      status: 200,
      data: [ { id: 42, name: 'Sören' } ],
      headers: undefined,
      config: {
        transitional: {
          silentJSONParsing: true,
          forcedJSONParsing: true,
          clarifyTimeoutError: false
        },
        transformRequest: [ [Function: transformRequest] ],
        transformResponse: [ [Function: transformResponse] ],
        timeout: 0,
        xsrfCookieName: 'XSRF-TOKEN',
        xsrfHeaderName: 'X-XSRF-TOKEN',
        maxContentLength: -1,
        maxBodyLength: -1,
        env: { FormData: [Function] },
        validateStatus: [Function: validateStatus],
        headers: { Accept: 'application/json, text/plain, */*' },
        method: 'get',
        url: '/api/users',
        data: undefined
      },
      request: { responseURL: '/api/users' }
    }

      at Object.<anonymous> (client/typed-rest-client.test.ts:19:13)

 PASS  src/client/typed-rest-client.test.ts
  ✓ single client request is executed (30 ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.115 s, estimated 2 s
Ran all test suites matching /typed-rest-client/i.

node:internal/process/promises:288
            triggerUncaughtException(err, true /* fromPromise */);
            ^
AxiosError {
  port: 80,
  address: '::1',
  syscall: 'connect',
  code: 'ECONNREFUSED',
  errno: -61,
  message: 'connect ECONNREFUSED ::1:80',
  stack: 'Error: connect ECONNREFUSED ::1:80\n' +
    '    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1195:16)',
  name: 'Error',
  config: {
    transitional: {
      silentJSONParsing: true,
      forcedJSONParsing: true,
      clarifyTimeoutError: false
    },
    adapter: [Function: httpAdapter],
    transformRequest: [ [Function: transformRequest] ],
    transformResponse: [ [Function: transformResponse] ],
    timeout: 0,
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
    maxContentLength: -1,
    maxBodyLength: -1,
    env: {
      FormData: [Function: FormData] {
        LINE_BREAK: '\r\n',
        DEFAULT_CONTENT_TYPE: 'application/octet-stream'
      }
    },
    validateStatus: [Function: validateStatus],
    headers: {
      Accept: 'application/json, text/plain, */*',
      'User-Agent': 'axios/0.27.2'
    },
    method: 'get',
    url: '/api/users',
    data: undefined
  },
  request: <ref *2> Writable {
    _writableState: WritableState {
      objectMode: false,
      highWaterMark: 16384,
      finalCalled: false,
      needDrain: false,
      ending: false,
      ended: false,
      finished: false,
      destroyed: false,
      decodeStrings: true,
      defaultEncoding: 'utf8',
      length: 0,
      writing: false,
      corked: 0,
      sync: true,
      bufferProcessing: false,
      onwrite: [Function: bound onwrite],
      writecb: null,
      writelen: 0,
      afterWriteTickInfo: null,
      buffered: [],
      bufferedIndex: 0,
      allBuffers: true,
      allNoop: true,
      pendingcb: 0,
      constructed: true,
      prefinished: false,
      errorEmitted: false,
      emitClose: true,
      autoDestroy: true,
      errored: null,
      closed: false,
      closeEmitted: false,
      [Symbol(kOnFinished)]: []
    },
    _events: [Object: null prototype] {
      response: [Function: handleResponse],
      error: [Function: handleRequestError],
      socket: [Function: handleRequestSocket]
    },
    _eventsCount: 3,
    _maxListeners: undefined,
    _options: {
      maxRedirects: 21,
      maxBodyLength: 10485760,
      protocol: 'http:',
      path: '/api/users',
      method: 'GET',
      headers: {
        Accept: 'application/json, text/plain, */*',
        'User-Agent': 'axios/0.27.2'
      },
      agent: undefined,
      agents: { http: undefined, https: undefined },
      auth: undefined,
      hostname: null,
      port: null,
      nativeProtocols: {
        'http:': {
          _connectionListener: [Function: connectionListener],
          METHODS: [
            'ACL',         'BIND',       'CHECKOUT',
            'CONNECT',     'COPY',       'DELETE',
            'GET',         'HEAD',       'LINK',
            'LOCK',        'M-SEARCH',   'MERGE',
            'MKACTIVITY',  'MKCALENDAR', 'MKCOL',
            'MOVE',        'NOTIFY',     'OPTIONS',
            'PATCH',       'POST',       'PROPFIND',
            'PROPPATCH',   'PURGE',      'PUT',
            'REBIND',      'REPORT',     'SEARCH',
            'SOURCE',      'SUBSCRIBE',  'TRACE',
            'UNBIND',      'UNLINK',     'UNLOCK',
            'UNSUBSCRIBE'
          ],
          STATUS_CODES: {
            '100': 'Continue',
            '101': 'Switching Protocols',
            '102': 'Processing',
            '103': 'Early Hints',
            '200': 'OK',
            '201': 'Created',
            '202': 'Accepted',
            '203': 'Non-Authoritative Information',
            '204': 'No Content',
            '205': 'Reset Content',
            '206': 'Partial Content',
            '207': 'Multi-Status',
            '208': 'Already Reported',
            '226': 'IM Used',
            '300': 'Multiple Choices',
            '301': 'Moved Permanently',
            '302': 'Found',
            '303': 'See Other',
            '304': 'Not Modified',
            '305': 'Use Proxy',
            '307': 'Temporary Redirect',
            '308': 'Permanent Redirect',
            '400': 'Bad Request',
            '401': 'Unauthorized',
            '402': 'Payment Required',
            '403': 'Forbidden',
            '404': 'Not Found',
            '405': 'Method Not Allowed',
            '406': 'Not Acceptable',
            '407': 'Proxy Authentication Required',
            '408': 'Request Timeout',
            '409': 'Conflict',
            '410': 'Gone',
            '411': 'Length Required',
            '412': 'Precondition Failed',
            '413': 'Payload Too Large',
            '414': 'URI Too Long',
            '415': 'Unsupported Media Type',
            '416': 'Range Not Satisfiable',
            '417': 'Expectation Failed',
            '418': "I'm a Teapot",
            '421': 'Misdirected Request',
            '422': 'Unprocessable Entity',
            '423': 'Locked',
            '424': 'Failed Dependency',
            '425': 'Too Early',
            '426': 'Upgrade Required',
            '428': 'Precondition Required',
            '429': 'Too Many Requests',
            '431': 'Request Header Fields Too Large',
            '451': 'Unavailable For Legal Reasons',
            '500': 'Internal Server Error',
            '501': 'Not Implemented',
            '502': 'Bad Gateway',
            '503': 'Service Unavailable',
            '504': 'Gateway Timeout',
            '505': 'HTTP Version Not Supported',
            '506': 'Variant Also Negotiates',
            '507': 'Insufficient Storage',
            '508': 'Loop Detected',
            '509': 'Bandwidth Limit Exceeded',
            '510': 'Not Extended',
            '511': 'Network Authentication Required'
          },
          Agent: [Function: Agent] { defaultMaxSockets: Infinity },
          ClientRequest: [Function: ClientRequest],
          IncomingMessage: [Function: IncomingMessage],
          OutgoingMessage: [Function: OutgoingMessage],
          Server: [Function: Server],
          ServerResponse: [Function: ServerResponse],
          createServer: [Function: createServer],
          validateHeaderName: [Function: __node_internal_],
          validateHeaderValue: [Function: __node_internal_],
          get: [Function: get],
          request: [Function: request],
          maxHeaderSize: [Getter],
          globalAgent: [Getter/Setter]
        },
        'https:': {
          Agent: [Function: Agent],
          globalAgent: Agent {
            _events: [Object: null prototype],
            _eventsCount: 2,
            _maxListeners: undefined,
            defaultPort: 443,
            protocol: 'https:',
            options: [Object: null prototype],
            requests: [Object: null prototype] {},
            sockets: [Object: null prototype] {},
            freeSockets: [Object: null prototype] {},
            keepAliveMsecs: 1000,
            keepAlive: false,
            maxSockets: Infinity,
            maxFreeSockets: 256,
            scheduling: 'lifo',
            maxTotalSockets: Infinity,
            totalSocketCount: 0,
            maxCachedSessions: 100,
            _sessionCache: [Object],
            [Symbol(kCapture)]: false
          },
          Server: [Function: Server],
          createServer: [Function: createServer],
          get: [Function: get],
          request: [Function: request]
        }
      },
      pathname: '/api/users'
    },
    _ended: true,
    _ending: true,
    _redirectCount: 0,
    _redirects: [],
    _requestBodyLength: 0,
    _requestBodyBuffers: [],
    _onNativeResponse: [Function (anonymous)],
    _currentRequest: <ref *1> ClientRequest {
      _events: [Object: null prototype] {
        response: [Function: bound onceWrapper] {
          listener: [Function (anonymous)]
        },
        abort: [Function (anonymous)],
        aborted: [Function (anonymous)],
        connect: [Function (anonymous)],
        error: [Function (anonymous)],
        socket: [Function (anonymous)],
        timeout: [Function (anonymous)]
      },
      _eventsCount: 7,
      _maxListeners: undefined,
      outputData: [],
      outputSize: 0,
      writable: true,
      destroyed: false,
      _last: true,
      chunkedEncoding: false,
      shouldKeepAlive: false,
      maxRequestsOnConnectionReached: false,
      _defaultKeepAlive: true,
      useChunkedEncodingByDefault: false,
      sendDate: false,
      _removedConnection: false,
      _removedContLen: false,
      _removedTE: false,
      _contentLength: 0,
      _hasBody: true,
      _trailer: '',
      finished: true,
      _headerSent: true,
      _closed: false,
      socket: Socket {
        connecting: false,
        _hadError: true,
        _parent: null,
        _host: 'localhost',
        _readableState: ReadableState {
          objectMode: false,
          highWaterMark: 16384,
          buffer: BufferList { head: null, tail: null, length: 0 },
          length: 0,
          pipes: [],
          flowing: true,
          ended: false,
          endEmitted: false,
          reading: true,
          constructed: true,
          sync: false,
          needReadable: true,
          emittedReadable: false,
          readableListening: false,
          resumeScheduled: false,
          errorEmitted: true,
          emitClose: false,
          autoDestroy: true,
          destroyed: true,
          errored: Error: connect ECONNREFUSED ::1:80
              at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1195:16) {
            errno: -61,
            code: 'ECONNREFUSED',
            syscall: 'connect',
            address: '::1',
            port: 80
          },
          closed: true,
          closeEmitted: true,
          defaultEncoding: 'utf8',
          awaitDrainWriters: null,
          multiAwaitDrain: false,
          readingMore: false,
          dataEmitted: false,
          decoder: null,
          encoding: null,
          [Symbol(kPaused)]: false
        },
        _events: [Object: null prototype] {
          end: [Function: onReadableStreamEnd],
          connect: [ [Function], [Function], [Function] ],
          free: [Function: onFree],
          close: [ [Function: onClose], [Function: socketCloseListener] ],
          timeout: [Function: onTimeout],
          agentRemove: [Function: onRemove],
          error: [Function: socketErrorListener],
          drain: [Function: ondrain]
        },
        _eventsCount: 8,
        _maxListeners: undefined,
        _writableState: WritableState {
          objectMode: false,
          highWaterMark: 16384,
          finalCalled: false,
          needDrain: false,
          ending: false,
          ended: false,
          finished: false,
          destroyed: true,
          decodeStrings: false,
          defaultEncoding: 'utf8',
          length: 132,
          writing: true,
          corked: 0,
          sync: false,
          bufferProcessing: false,
          onwrite: [Function: bound onwrite],
          writecb: [Function: bound onFinish],
          writelen: 132,
          afterWriteTickInfo: null,
          buffered: [],
          bufferedIndex: 0,
          allBuffers: true,
          allNoop: true,
          pendingcb: 1,
          constructed: true,
          prefinished: false,
          errorEmitted: true,
          emitClose: false,
          autoDestroy: true,
          errored: Error: connect ECONNREFUSED ::1:80
              at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1195:16) {
            errno: -61,
            code: 'ECONNREFUSED',
            syscall: 'connect',
            address: '::1',
            port: 80
          },
          closed: true,
          closeEmitted: true,
          [Symbol(kOnFinished)]: []
        },
        allowHalfOpen: false,
        _sockname: null,
        _pendingData: 'GET /api/users HTTP/1.1\r\n' +
          'Accept: application/json, text/plain, */*\r\n' +
          'User-Agent: axios/0.27.2\r\n' +
          'Host: localhost\r\n' +
          'Connection: close\r\n' +
          '\r\n',
        _pendingEncoding: 'latin1',
        server: null,
        _server: null,
        parser: null,
        _httpMessage: [Circular *1],
        [Symbol(async_id_symbol)]: 299,
        [Symbol(kHandle)]: null,
        [Symbol(lastWriteQueueSize)]: 0,
        [Symbol(timeout)]: null,
        [Symbol(kBuffer)]: null,
        [Symbol(kBufferCb)]: null,
        [Symbol(kBufferGen)]: null,
        [Symbol(kCapture)]: false,
        [Symbol(kSetNoDelay)]: true,
        [Symbol(kSetKeepAlive)]: true,
        [Symbol(kSetKeepAliveInitialDelay)]: 60,
        [Symbol(kBytesRead)]: 0,
        [Symbol(kBytesWritten)]: 0
      },
      _header: 'GET /api/users HTTP/1.1\r\n' +
        'Accept: application/json, text/plain, */*\r\n' +
        'User-Agent: axios/0.27.2\r\n' +
        'Host: localhost\r\n' +
        'Connection: close\r\n' +
        '\r\n',
      _keepAliveTimeout: 0,
      _onPendingData: [Function: nop],
      agent: Agent {
        _events: [Object: null prototype] {
          free: [Function (anonymous)],
          newListener: [Function: maybeEnableKeylog]
        },
        _eventsCount: 2,
        _maxListeners: undefined,
        defaultPort: 80,
        protocol: 'http:',
        options: [Object: null prototype] { noDelay: true, path: null },
        requests: [Object: null prototype] {},
        sockets: [Object: null prototype] {
          'localhost:80:': [ [Socket], [Socket], [Socket] ]
        },
        freeSockets: [Object: null prototype] {},
        keepAliveMsecs: 1000,
        keepAlive: false,
        maxSockets: Infinity,
        maxFreeSockets: 256,
        scheduling: 'lifo',
        maxTotalSockets: Infinity,
        totalSocketCount: 3,
        [Symbol(kCapture)]: false
      },
      socketPath: undefined,
      method: 'GET',
      maxHeaderSize: undefined,
      insecureHTTPParser: undefined,
      path: '/api/users',
      _ended: false,
      res: null,
      aborted: false,
      timeoutCb: null,
      upgradeOrConnect: false,
      parser: null,
      maxHeadersCount: null,
      reusedSocket: false,
      host: 'localhost',
      protocol: 'http:',
      _redirectable: [Circular *2],
      [Symbol(kCapture)]: false,
      [Symbol(kNeedDrain)]: false,
      [Symbol(corked)]: 0,
      [Symbol(kOutHeaders)]: [Object: null prototype] {
        accept: [ 'Accept', 'application/json, text/plain, */*' ],
        'user-agent': [ 'User-Agent', 'axios/0.27.2' ],
        host: [ 'Host', 'localhost' ]
      }
    },
    _currentUrl: 'http:/api/users',
    [Symbol(kCapture)]: false
  }
}

Node.js v18.0.0

I've installed axios@0.27.2 and axios-mock-adapter@1.21.1. Might this be related to https://github.com/ctimmerm/axios-mock-adapter/issues/338 ?

[olnluis]

Were you able to get any resolution/update on this?