Testing Promises/A+ compliance

promises-aplus.js

var pr = new Promise(function(resolve, reject) {
	resolve("a");
})

pr.then(function(val) {
	console.log(".then triggered");
})

console.log("after defining .then");

Correct output, for a Promises/A+ compliant implementation:

after defining .then
.then triggered

If the order is different, then the implementation is not A+ compliant, as the .then handlers are not guaranteed to be executed asynchronously.