How to debug karma unit tests?

[stefek99]

1. Installed npm install karma-chrome-launcher --save-dev
2. Added following to package.json: "test-debug": "karma start --browsers=Chrome --single-run=false"
3. When running npm start test-debug I'm getting following error:

Chrome 51.0.2704 (Mac OS X 10.11.5) ERROR
  Uncaught Error: Cannot find module "./app"
  at http://localhost:9876/context.html:5

Workaround

Edit karma.conf.js and override --browsers=Chrome --single-run=false

---

Any ideas how to make it better?

[phra]

just install karma-chrome-launcher as development dependency and add chrome to karma browsers list in webpack config.

browsers: [
      // Run tests using PhantomJS
      'PhantomJS',
      'Chrome'
    ]