Moment not working with Karma unit tests

Expected behavior

I expected all of my unit tests to run properly, as they do when I do not include moment-timezone in my component that is being tested by Karma.

Actual behaviour

None of my tests run and instead I get this error:

START:
Chrome 50.0.2661 (Mac OS X 10.9.2) ERROR
  Uncaught Error: Cannot find module "./data/packed/latest.json"
  at /Users/myuser/myapp/tests.webpack.js:50215 <- webpack:///~/moment-timezone/index.js:2:0
Chrome 50.0.2661 (Mac OS X 10.9.2) ERROR
  Uncaught Error: Cannot find module "./data/packed/latest.json"
  at /Users/myuser/myapp/tests.webpack.js:50215 <- webpack:///~/moment-timezone/index.js:2:0

Enviroment Details

• Karma version (output of karma --version): 0.13.22

Steps to reproduce the behaviour

1. Run npm install moment-timezone
2. Include this in the top of your file: import moment from 'moment-timezone';
3. Include this in your component: console.log(moment.tz.guess());

NOTE: This is a duplicate of this issue filed on the moment-timezone GitHub page.

[maksimr]

@leopoldjoy thanks,

first of all you have forgotten install moment-timezone (npm install --save-dev moment-timezone) here

Problem in webpack config which you set in karma.config.js. In your configuration for test you ignore json files but moment-timezone require json file. To fix your problem simple remove or comment ignore plugin

Thanks

[leopoldjoy]

@maksimr Thank you for the response! I had moment-timezone installed, I just forgot the --save, sorry. Worked perfectly once commented! 👍