Can log4js-node run in a karma-browserify set up?

Question

I am trying to learn Node test-driven frameworks.

I figured I should include a logging system, but can't seem to get it to work.

yourself@BDD0:~/BDD/simplest$ npm run test-browser

> simplest@1.0.0 test-browser /home/yourself/BDD/simplest
> ./node_modules/karma/bin/karma start

INFO [framework.browserify]: registering rebuild (autoWatch=true)
INFO [karma]: Karma v0.12.28 server started at http://localhost:9876/
INFO [launcher]: Starting browser Chrome
INFO [Chrome 39.0.2171 (Linux)]: Connected on socket p0GQRPZBeIOsd2Uz1e0p with id 97681222
INFO [framework.browserify]: 103086 bytes written (2.52 seconds)
INFO [framework.browserify]: bundle built
Chrome 39.0.2171 (Linux) ERROR
    Uncaught Error: Problem reading log4js config { appenders: [ { type: 'console' } ], replaceConsole: false }. 
    Error was "Cannot find module 'console'" (Error: Cannot find module 'console'
  at s (/tmp/9e6dc093e0e34f105c98657867f51cb8bdd77edf.browserify:1:156)
          :      :
          :      :

I'm hoping someone recognizes the error and can tell me what it means.

The Chrome browser has a console. I have nodejs-console in my dependencies.

Am I trying something that log4js cannot do?

Thanx.

Karma doesn't work on NodeJS code, only browser Javascript. And NodeJS code doesn't work in the browser, so you can't use log4JS in client scripts. — Kyle Hale, Dec 04 '14 at 04:23
Ok. The declared purpose of browserify is to make Node.js packages work in the browser and it follows that the implicit purpose of karma-browserify is to facilitate testing Node.js packages running in the browser. But according you, in the case of log4js-node it can't be done? You know this for a fact? — Martin Bramwell, Dec 05 '14 at 11:57
@KyleHale - you should only comment if you know for certain. — Martin Bramwell, Dec 10 '14 at 21:07
Really? That seems like a good way to not get any real answers around here. But thanks for your constructive criticism. — Kyle Hale, Dec 10 '14 at 21:57

Martin Bramwell · Answer 1 · 2015-04-20T12:22:57.987

Ok I got it to work.

I found it necessary to clone the log4js project and edit log4js.js, in order to add a single line :

 require('./appenders/console');

I have posted a Pull Request for my solution : Force bundling of appenders/console

I have created a little demo that shows it in action : javascript-bdd-baby-steps

Possibly my pull request will be rejected with a description of the correct solution. If so I will update here.

I hope this helps someone somewhere someday.

Update 2015/04/20:

My PR was accepted.

Can log4js-node run in a karma-browserify set up?

1 Answers1