skalb.com

Despite no mention in the official Meteor docs, adding unit tests is fairly easy. For some reason, they don’t mention this but any files in the tests/ folder will be ignored by the Meteor server.

What you’ll need:

• Meteor
• Npm
• Mocha

1
2
3

meteor create mocha
cd mocha
meteor add coffeescript

Setting up Mocha to watch our coffee files and send Growl notifications:

1

mocha tests/*.coffee -w -G --compilers coffee:coffee-script

Now to create a sample test:

1
2
3
4
5

describe "Array", ->
  describe "#indexOf()", ->
    it "should return -1 when the value is not present", ->
      assert.equal -1, [1, 2, 3].indexOf(1)
      assert.equal -1, [1, 2, 3].indexOf(0)

Mocha should notice the file change and run the tests showing you the passing test.

Source code here.

Some notes:

• The growl notification didn’t work for me, but I assume that’s because I’m using an old version.
• When using Mocha watch, sometimes a failing test result would be outputted many times
• Jasmine should also work fine