Testing a debounced function in AngularJS with Jasmine never calls the function

Question

I have a method in a service that uses underscore\'s debounce.

Inside that method is a call to a method on a different service. I\'m trying to test that the different s

Answer 1

You just need to mock lodash debounce method:

describe('Whoa', function(){
  var $injector, whoa, herp;

  beforeEach(function(){
    module('derp');
    spyOn(_, 'debounce').and.callFake(function(cb) { return function() { cb(); } });
    inject(function(_$injector_){
      var Whoa;
      $injector = _$injector_;
      Whoa = $injector.get('Whoa');
      herp = $injector.get('herp');
      whoa = new Whoa();
    });
  });

  beforeEach(function(){
    spyOn(herp, 'aMethod').andCallThrough();
  });

  it('has a method getMind, that calls herp.aMethod', function(){
    whoa.getMind();
    expect(herp.aMethod).toHaveBeenCalled();
  });
});