refactor redraw into pubsub and autoredraw

- pubsub is a basic pubsub impl
- autoredraw is glue code to register callback to pubsub and onevent

moved e.redraw to autoredraw

api/tests/test-autoredraw.js

@@ -0,0 +1,63 @@
+"use strict"
+
+var o = require("../../ospec/ospec")
+var domMock = require("../../test-utils/domMock")
+
+var coreRenderer = require("../../render/render")
+var apiPubSub = require("../../api/pubsub")
+var autoredraw = require("../../api/autoredraw")
+
+o.spec("autoredraw", function() {
+	var FRAME_BUDGET = Math.floor(1000 / 60)
+	var $window, root, renderer, pubsub, spy
+	o.beforeEach(function() {
+		$window = domMock()
+		root = $window.document.body
+		renderer = coreRenderer($window)
+		pubsub = apiPubSub()
+		spy = o.spy()
+	})
+	
+	o("returns self-trigger", function() {
+		var run = autoredraw(root, renderer, pubsub, spy)
+		
+		run()
+		
+		o(spy.callCount).equals(1)
+	})
+	
+	o("registers onevent", function() {
+		autoredraw(root, renderer, pubsub, spy)
+		
+		renderer.render(root, {tag: "div", attrs: {onclick: function() {}}})
+		
+		var e = $window.document.createEvent("MouseEvents")
+		e.initEvent("click", true, true)
+		root.firstChild.dispatchEvent(e)
+		
+		o(spy.callCount).equals(1)
+	})
+	
+	o("registers pubsub", function() {
+		autoredraw(root, renderer, pubsub, spy)
+		
+		pubsub.publish()
+		
+		o(spy.callCount).equals(1)
+	})
+	o("throttles", function(done) {
+		var run = autoredraw(root, renderer, pubsub, spy)
+		
+		run()
+		run()
+		
+		o(spy.callCount).equals(1)
+		
+		setTimeout(function() {
+			o(spy.callCount).equals(2)
+			
+			done()
+		}, FRAME_BUDGET)
+	})
+	
+})