How do I resolve a $q.when promise in unit tests? - angularjs

Question

I'm using $q.when to convert third-party promises (those returned by PouchDB)
into Angular promises.
Given:
'use strict';
angular.module('test', [])
.service('pouchdb', function($q, $window) {
var db = new $window.PouchDB('test');
this.info = function() {
return $q.when(db.info.apply(db, arguments));
};
})
.controller('test', function($scope, pouchdb) {
pouchdb.info()
.then(function(info) {
$scope.result = info;
})
.catch(function(error) {
$scope.result = error;
});
});
… in the browser, info is returned and $scope updated correctly. However,
given the following unit test (Jasmine 2.x):
describe('Q when tests', function() {
beforeEach(module('test'));
var $rootScope, pouchdb;
beforeEach(inject(function(_$rootScope_, pouchdb) {
$rootScope = _$rootScope_;
pouchdb = pouchdb;
}));
it('should resolve a promise', function(done) {
pouchdb.info()
.then(function(info) {
expect(info).toBeDefined();
})
.finally(done);
$rootScope.$apply();
});
});
… info is never resolved and Jasmine (via Karma & PhantomJS) throws:
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
By calling $rootScope.$apply(), I'd expect a digest to be triggered and the
promise to be resolved. How do I resolve the promise in this case?
Note, I've loaded es5-shim for bind/apply support in PhantomJS.
Edit: I've tried moving $rootScope.$apply() to the top of the test (and in an afterEach block), alternating to $rootScope.$digest() and increasing Jasmine's timeout (jasmine.DEFAULT_TIMEOUT_INTERVAL = 10000;).

Answer 1

Unwittingly, I resolved the issue by manually injecting ng:
describe('Working Q when tests', function() {
var pouchdb;
beforeEach(function() {
var $injector = angular.injector(['ng', 'test']);
var pouchDB = $injector.get('pouchdb');
pouchdb = pouchDB('db');
});
it('should resolve a promise', function(done) {
pouchdb.info()
.then(function(info) {
expect(info).toBeDefined();
})
.finally(done);
});
});