"TypeError: serverless.classes.Variables is not a constructor" when invoking a test

[feg624]

When using the following versions:

"serverless": "^3.19.0",
"serverless-jest-plugin": "^0.4.0",

and executing npx sls invoke test

the following error is reported:

Error:
TypeError: serverless.classes.Variables is not a constructor
    at /home/franco/repos/palm-serverless/node_modules/serverless-jest-plugin/lib/run-tests.js:13:18
    at Promise._execute (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/debuggability.js:384:9)
    at Promise._resolveFromExecutor (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/promise.js:518:18)
    at new Promise (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/promise.js:103:10)
    at runTests (/home/franco/repos/palm-serverless/node_modules/serverless-jest-plugin/lib/run-tests.js:8:3)
    at ServerlessJestPlugin.<anonymous> (/home/franco/repos/palm-serverless/node_modules/serverless-jest-plugin/index.js:97:23)
    at ServerlessJestPlugin.tryCatcher (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromiseCtx (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/promise.js:641:10)
    at _drainQueueStep (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/async.js:97:12)
    at _drainQueue (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/franco/repos/palm-serverless/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (node:internal/timers:466:21)
    at process.topLevelDomainCallback (node:domain:152:15)
    at process.callbackTrampoline (node:internal/async_hooks:128:24)

It seems that on file run-tests.js, the lines 13 and 14 are not needed with the latest version of serverless.

[nomurashunta]

+1 I have exactly the same problem.

[bdelamotte]

+1 same problem. Can I create a PR just deleting those lines?

[EmmanDizon]

encountering the same problem +1

[EmmanDizon]

@bdelamotte can you create pull request to fix this issue ?

[FaridSafi]

+1

[ZentPeople]

+1

[leosantosw]

+1
Jest version: ~29.3.1
serverless-jest-plugin version: ~0.4.0

Error:
TypeError: Class extends value # is not a constructor or null

[mehradnia]

Same problem.

"jest": "^29.5.0"
"serverless-jest-plugin": "^0.4.0"
`TypeError: serverless.classes.Variables is not a constructor`

[wjziv]

It should be noted that the in the serverless library, the last reference to Serverless.classes.Variables is established in version 2.72.3.

This library does not appear to be updated for v3 of serverless, despite it's been out for more than a year now.