Helper stopped working in CodeceptJS 3.x: Error: Could not load helper CmdHelper from module

[mirao]

$ codeceptjs run --profile jobr --debug
(node:1889297) UnhandledPromiseRejectionWarning: Error: Could not load helper CmdHelper from module '/home/mirao/workspace/codeceptjs/node_modules/codeceptjs-cmdhelper':
Class extends value #<Object> is not a constructor or null
TypeError: Class extends value #<Object> is not a constructor or null
    at Object.<anonymous> (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs-cmdhelper/index.js:11:25)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at createHelpers (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/container.js:166:27)
    at Function.create (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/container.js:43:25)
    at Codecept.init (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/codecept.js:56:15)
    at createHelpers (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/container.js:181:13)
    at Function.create (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/container.js:43:25)
    at Codecept.init (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/codecept.js:56:15)
    at Command.module.exports (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/lib/command/run.js:22:12)
    at Command.listener (/home/mirao/workspace/codeceptjs/node_modules/commander/index.js:315:8)
    at Command.emit (events.js:314:20)
    at Command.parseArgs (/home/mirao/workspace/codeceptjs/node_modules/commander/index.js:651:12)
    at Command.parse (/home/mirao/workspace/codeceptjs/node_modules/commander/index.js:474:21)
    at Object.<anonymous> (/home/mirao/workspace/codeceptjs/node_modules/codeceptjs/bin/codecept.js:189:9)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
(node:1889297) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:1889297) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

codecept.conf.js:

        CmdHelper: {
            require: "../../node_modules/codeceptjs-cmdhelper"
        }

Workaround/solution: (it helped me even for my custom helpers which worked in 2.6.11 and stopped working in 3.0.x):

• Remove the line const Helper = require('codeceptjs').helper; from node_modules/codeceptjs-cmdhelper/index.js
  

Used SW:

• Ubuntu 20.04
• CodeceptJS 3.0.2
• codeceptjs-cmdhelper@2.2.1

[thiagodp]

Hello @mirao, thank you for checking it with CodeceptJS 3.x.

Currently I'm running out of time (for the next 3 weeks). So whether you can fix it, please feel free to send a PR.

[thiagodp]

I did a quick check here with both versions 2.x and 3.x (on Windows OS) and didn't get the reported error. However, when I removed the line const Helper = require( 'codeceptjs' ).helper;, it also worked. So maybe it doesn't make a difference - let's remove it then.