Test program for iterable support in when.all & when/es6-shim/Promise.all

iterable-test.js

var when = require('when');

function ArrayIterable(a) {
	this.array = a;
}

ArrayIterable.prototype._es6shim_iterator_ = function() {
	return new ArrayIterator(this.array);
};

function ArrayIterator(a) {
	this.array = a;
	this.index = 0;
}

ArrayIterator.prototype.next = function() {
	if(this.index < this.array.length) {
		var i = this.index;
		this.index += 1;
		return new Iteration(this.array[i]);
	}

	return Iteration.DONE;
};

function Iteration(value) {
	this.value = value;
	this.done = false;
}

var DONE = new Iteration(void 0);
DONE.done = true;

Iteration.DONE = DONE;

var a = [];
for(var i=0; i<100000; ++i) {
	a.push(when.resolve(i).delay(1));
}

function inc(x) {
	return x+1;
}

when.all(a).then(function(a) {

	var start = Date.now();
	return when.all(a).then(function(a) {
		console.log('Array all', Date.now() - start, a.length);
	});

}).then(function() {

	return when.map(a, inc).then(function(a) {
		var start = Date.now();
		return when.map(a, inc).then(function(a) {
			console.log('Array map', Date.now() - start, a.length);
		});
	});

}).then(function() {

	return when.all(new ArrayIterable(a)).then(function(a) {

		var start = Date.now();
		return when.all(new ArrayIterable(a)).then(function(a) {
			console.log('Iterable all', Date.now() - start, a.length);
		});

	}).then(function() {

		return when.map(new ArrayIterable(a), inc).then(function(a) {
			var start = Date.now();
			return when.map(new ArrayIterable(a), inc).then(function(a) {
				console.log('Iterable map', Date.now() - start, a.length);
			});
		});

	});

});