I've cloned this repo and npm installed. But when I run karma start I get following warnings:

WARN [preprocess]: Can not load "webpack", it is not registered!
  Perhaps you are missing some plugin?
WARN [preprocess]: Can not load "sourcemap", it is not registered!
  Perhaps you are missing some plugin?
INFO [karma]: Karma v0.12.37 server started at http://localhost:9876/
WARN [launcher]: Can not load "Chrome", it is not registered!
  Perhaps you are missing some plugin?
INFO [Chrome 43.0.2357 (Linux 0.0.0)]: Connected on socket MzTlihDi8ejzKVYkg9-3 with id manual-3092

Then when I open the URL from console I get this error:

Chrome 43.0.2357 (Linux 0.0.0) ERROR
  Uncaught ReferenceError: require is not defined
  at /home/janusz/devel/github/react-karma-webpack-testing/tests.webpack.js:1
Chrome 43.0.2357 (Linux 0.0.0): Executed 0 of 0 ERROR (0.203 secs / 0 secs)

What could be the reason? Am I missing any setup step?

Did clone -> npm install -> npm test
But I get an error

module.js:340
throw err;
^
Error: Cannot find module 'base64id'
at Function.Module._resolveFilename (module.js:
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (c:\TestExamples\KarmaWeb
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
npm ERR! Test failed. See above for more details.

Can you help ?

On npm test got:

PhantomJS 1.9.8 (Windows 7 0.0.0) ERROR
  SyntaxError: Parse error
  at D:/Projects/betbull_web/tests.webpack.js:5941
PhantomJS 1.9.8 (Windows 7 0.0.0): Executed 0 of 0 ERROR (0.083 secs / 0 secs)

When I was reading your post I found the debug.html is amazing but you didn't mentioned how did you implement that in your post, If I what to implement that, what should I do?

THX

$ karma start
19 12 2016 16:01:01.913:ERROR [preprocess]: Can not load "webpack", it is not registered!
Perhaps you are missing some plugin?
19 12 2016 16:01:01.917:ERROR [preprocess]: Can not load "sourcemap", it is not registered!
Perhaps you are missing some plugin?
/usr/local/lib/node_modules/karma/node_modules/di/lib/injector.js:9
throw error('No provider for "' + name + '"!');
^

Error: No provider for "framework:mocha"! (Resolving: framework:mocha)
at error (/usr/local/lib/node_modules/karma/node_modules/di/lib/injector.js:22:12)
at Object.parent.get (/usr/local/lib/node_modules/karma/node_modules/di/lib/injector.js:9:13)
at get (/usr/local/lib/node_modules/karma/node_modules/di/lib/injector.js:54:19)
at /usr/local/lib/node_modules/karma/lib/server.js:143:20
at Array.forEach (native)
at Server._start (/usr/local/lib/node_modules/karma/lib/server.js:142:21)
at invoke (/usr/local/lib/node_modules/karma/node_modules/di/lib/injector.js:75:15)
at Server.start (/usr/local/lib/node_modules/karma/lib/server.js:103:18)
at Object.exports.run (/usr/local/lib/node_modules/karma/lib/cli.js:280:26)
at Object. (/usr/local/lib/node_modules/karma/bin/karma:3:23)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)