Finally clause of promise never getting executed in Jasmine test - angularjs

Question

I have this jasmine test, and the finally clause on a promise appears to not be getting executed, as I get the error:
PhantomJS 2.1.1 (Mac OS X 0.0.0) Service: petsFactory .getPetsAsync() should return a list of pets FAILED
Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.
My test file looks like:
'use strict';
describe('Service: petsFactory', function () {
// load the service's module
beforeEach(module('smokeTestApp'));
// instantiate service
var petsFactory;
beforeEach(inject(function (_petsFactory_) {
petsFactory = _petsFactory_;
}));
describe('.getPetsAsync()', function () {
it('should return a list of pets', function (done) {
var testPets = function (pets) {
expect(Array.isArray(pets)).toBe(true);
}
var failTest = function(error) {
expect(error).toBeUndefined();
};
petsFactory
.getPetsAsync()
.then(testPets)
.catch(failTest)
.finally(done);
});
});
});
The relevant factory method looks like:
var getPetsAsync = function () {
return $q.when(pets);
};
The contents of the pets variable is totally synchronous, the promise is just a wrapper on a synchronous value that is there immediately.
What is going wrong here?

Answer 1

From the documentation:
When testing promises, it's important to know that the resolution of
promises is tied to the digest cycle. That means a promise's then,
catch and finally callback functions are only called after a digest
has run. In tests, you can trigger a digest by calling a scope's
$apply function. If you don't have a scope in your test, you can
inject the $rootScope and call $apply on it. There is also an example
of testing promises in the $q service documentation.
So simply inject $rootScope and use $apply:
petsFactory
.getPetsAsync()
.then(testPets)
.catch(failTest)
.finally(done);
$rootScope.$apply();