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javascript error: Cannot convert undefined or null to object

See original GitHub issue

Hey, after updating electron to v10 and spectron to v12 I’ve started having issues with running my test suite. So I started debugging by creating a single test with code taken from spectron’s readme. And when trying to run this test (I’m using Jest by the way) I get this error:

javascript error: javascript error: Cannot convert undefined or null to object
      (Session info: chrome=85.0.4183.98)

      at getErrorFromResponseBody (node_modules/webdriver/build/utils.js:121:10)
      at WebDriverRequest._request (node_modules/webdriver/build/request.js:149:56)
      at Browser.wrapCommandFn (node_modules/@wdio/utils/build/shim.js:74:23)
      at Browser.wrapCommandFn (node_modules/@wdio/utils/build/shim.js:74:23)

Application window launches however, the test fails

Node: v14.10.1
spectron: 12.0.0
electron: v10.1.2
chromedriver: 85.0.4183.98

Issue Analytics

State:
Created 3 years ago
Reactions:25
Comments:23

Top GitHub Comments

12reactions

amiller-ghcommented, Dec 13, 2020

Tracked this one down I think.

Its an error from https://github.com/electron-userland/spectron/blob/1510a9beddb64ca3630c143ccdc15466e17b40f5/lib/api.js whose stack trace gets eaton by the bootstrap process.

Running it manually, we find the error is thrown here because electron.remote is undefined: https://github.com/electron-userland/spectron/blob/1510a9beddb64ca3630c143ccdc15466e17b40f5/lib/api.js#L141

As of Electron 10 enableRemoteModule defaults to false. It will be removed in v14. https://github.com/electron/electron/blob/master/docs/breaking-changes.md#default-changed-enableremotemodule-defaults-to-false

The fix for me was to explicitly enable it when creating my window in webPreferences:

const win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: true,
      enableRemoteModule: true,
    },
  });

This should be updated in the getting started docs, and Spectron should migrate away from electron.remote if that’s not already planned 🙂

3reactions

TheOne20001commented, Sep 29, 2020

I have seen both of these. I have tried these two fixes but no luck there.

https://github.com/electron-userland/spectron/issues/174 https://github.com/electron-userland/spectron/issues/254