Injecting dependent services when unit testing AngularJS services

Question

I\'m testing service A, but service A depends on service B (i.e. service B is injected into service A).

I\'ve seen this question but my case is a bit different becau

Answer 1

I was doing this in CoffeeScript and found an extra gotcha. (Also, I found the code on this page to be confusingly terse.) Here's a complete working example:

describe 'serviceA', ->
   mockServiceB = {}

   beforeEach module 'myApp' # (or just 'myApp.services')

   beforeEach ->
      angular.mock.module ($provide) ->
         $provide.value 'serviceB', mockServiceB
         null

   serviceA = null
   beforeEach inject ($injector) ->
      serviceA = $injector.get 'serviceA'

   it 'should work', ->
      expect( true ).toBe( true )
      #serviceA.doStuff()

Without explicitly returning null after $provide.value, I kept getting Error: Argument 'fn' is not a function, got Object. I found the answer in this Google Groups thread.