Just wondering, I'm writing test cases and haven't been able to find a definitive answer as to whether null can be returned in an angularJS promise (rather than an object called null )
Yes, just like synchronous code a promise can fulfill with whatever you want it to.
//example with Bluebird
Promise.try(function(){
return null;
}).then(function(result){
alert(result === null); // true
});
A promise can also reject with null, but it generally shouldn't since you should always reject with errors.
In Angular, using $q the simplest example is something like $q.when(null) which creates a promise fulfilled with the value null explicitly.
