angular.js jasmine test spec for controller defined inside a module

controllersSpec.js

'use strict';

/* jasmine specs for controllers go here */

describe('PhoneCat controllers', function() {

    describe('PhoneListCtrl', function() {
        
        beforeEach(module('phonesCat.controllers'));

        var ctrl, scope;

        beforeEach(inject(function($controller, $rootScope) {
            scope = $rootScope.$new();
            ctrl = $controller('PhoneListCtrl', {
                $scope: scope
            });
        }));

        it('should create "phones" model with 3 phones', function() {
            expect(scope.phones.length).toBe(3);
        });
    });
});

Question...

beforeEach(module('phonesCat.controllers'));

What type of 'module' is being referred to here?

I'm just starting to get into testing and the work 'modules' get's thrown around a lot.

In this case it's a controller. In angularjs anything is treated as a module: a controller is a module, just like a service and a directive.