fix #1404

api/tests/test-redraw.js

@@ -0,0 +1,82 @@
+"use strict"
+
+var o = require("../../ospec/ospec")
+var domMock = require("../../test-utils/domMock")
+var apiRedraw = require("../../api/redraw")
+
+o.spec("redrawService", function() {
+	var root, redrawService, $document
+	o.beforeEach(function() {
+		var $window = domMock()
+		root = $window.document.body
+		redrawService = apiRedraw($window)
+		$document = $window.document
+	})
+
+	o("shouldn't error if there are no renderers", function() {
+		redrawService.redraw()
+	})
+
+	o("should run a single renderer entry", function() {
+		var spy = o.spy()
+
+		redrawService.subscribe(root, spy)
+
+		redrawService.redraw()
+
+		o(spy.callCount).equals(1)
+
+		redrawService.redraw()
+		redrawService.redraw()
+		redrawService.redraw()
+
+		o(spy.callCount).equals(4)
+	})
+
+	o("should run all renderer entries", function() {
+		var el1 = $document.createElement("div")
+		var el2 = $document.createElement("div")
+		var el3 = $document.createElement("div")
+		var spy1 = o.spy()
+		var spy2 = o.spy()
+		var spy3 = o.spy()
+
+		redrawService.subscribe(el1, spy1)
+		redrawService.subscribe(el2, spy2)
+		redrawService.subscribe(el3, spy3)
+
+		redrawService.redraw()
+
+		o(spy1.callCount).equals(1)
+		o(spy2.callCount).equals(1)
+		o(spy3.callCount).equals(1)
+
+		redrawService.redraw()
+
+		o(spy1.callCount).equals(2)
+		o(spy2.callCount).equals(2)
+		o(spy3.callCount).equals(2)
+	})
+
+	o("should stop running after unsubscribe", function() {
+		var spy = o.spy()
+
+		redrawService.subscribe(root, spy)
+		redrawService.unsubscribe(root, spy)
+
+		redrawService.redraw()
+
+		o(spy.callCount).equals(0)
+	})
+
+	o("does nothing on invalid unsubscribe", function() {
+		var spy = o.spy()
+
+		redrawService.subscribe(root, spy)
+		redrawService.unsubscribe(null)
+
+		redrawService.redraw()
+
+		o(spy.callCount).equals(1)
+	})
+})