How would you make an AngularJS service return a promise? Write a code snippet as an example

To add promise functionality to a service, we inject the “$q” dependency in the service, and then use it like so:

angular.factory('testService', function($q){
return {
getName: function(){
var deferred = $q.defer();

//API call here that returns data
testAPI.getName().then(function(name){
deferred.resolve(name)
})

return deferred.promise;
}
}
})

The $q library is a helper provider that implements promises and deferred objects to enable asynchronous functionality

Source: https://docs.angularjs.org/api/ng/service/$q