A simple test of AbortablePromise. See https://github.com/cujojs/when/pull/415

abort-example.js

var Promise = require('when/lib/Promise');
var makeAbortablePromise = require('when/lib/makeAbortablePromise');

var AbortablePromise = makeAbortablePromise(Promise);

var p = new AbortablePromise(function() {
	var t = setInterval(function() {
		console.log('running');
	}, 100);

	return function() {
		console.log('aborted');
		clearInterval(t);
		return 'Abort result';
	};
});

// Ensure that abort is propagated thru the promise graph
p = p.then();
setTimeout(function() {
	var result = p.abort();

	console.log(result); // This will log a promise object

	result.then(console.log); // This will log "Abort result"

	p.abort(); // Ensure abort can only run once
}, 500);