Error found when attempting to inject mock service into Angular test source code

Below is the code for my module declaration:

(angular.module 'services.date', [])

.service '$date', () ->
  # stuff
  this

This section shows the injection code I am using:

describe 'Service: dateService', () ->
  dateService = null
  beforeEach module 'services.date'
  beforeEach inject (_$date_) ->
    dateService = _$date_

  describe 'Test', () ->
    it 'should test stuff', () ->
      (expect true).toBe true

Error message when running the above code:

Firefox 37.0.0 (Ubuntu 0.0.0) Service: dateService Test should test stuff FAILED
    minErr/<@/home/pv/Sites/web/ngbp-coffee/vendor/angular/angular.js:68:12
    loadModules/<@/home/pv/Sites/web/ngbp-coffee/vendor/angular/angular.js:4411:15
    forEach@/home/pv/Sites/web/ngbp-coffee/vendor/angular/angular.js:336:11
    loadModules@/home/pv/Sites/web/ngbp-coffee/vendor/angular/angular.js:4372:5
    createInjector@/home/pv/Sites/web/ngbp-coffee/vendor/angular/angular.js:4297:11
    workFn@/home/pv/Sites/web/ngbp-coffee/vendor/angular-mocks/angular-mocks.js:2172:44

If I comment out the injection code, the test passes as shown below:

describe 'Service: dateService', () ->
  # dateService = null
  # beforeEach module 'services.date'
  # beforeEach inject (_$date_) ->
  #   dateService = _$date_

  describe 'Test', () ->
    it 'should test stuff', () ->
      (expect true).toBe true

// after running

Firefox 37.0.0 (Ubuntu 0.0.0): Executed 1 of 1 SUCCESS (0.003 secs / 0.002 secs)

Done, without errors.

I seem to be having an issue with how I'm injecting the service. Any assistance would be greatly appreciated.

UPDATE

It appears that the $injector service is unable to recognize my other service. When I run

$injector.has '$date'

The result is false

What could possibly be wrong in my implementation? Please advise.

javascriptangularjskarma-runnerkarma-jasmine

Answer №1

Utilizing the "Underscore Wrapping" technique is beneficial in scenarios where you prefer not to obscure your variable (dateService) with the injected reference (_ $date _). This means that opting for _ $date _ is advantageous only if you intend to use the name "$date" for your variable instead of dateService.

Nevertheless, this approach does not resolve the issue at hand. It is imperative for $injector to possess '$date'. Providing further assistance may be challenging without additional code insights. The problem likely lies within either the factory declaration or the Karma configuration file being utilized since, evidently, "$date" has not been loaded.

I have successfully executed the same code on my end (albeit with an empty factory).

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