[ol.Tile] trigger load and error events

src/ol/Tile.js

@@ -2,6 +2,7 @@ goog.provide('ol.Tile');
 
 goog.require('goog.events');
 goog.require('ol.Bounds');
+goog.require('ol.event.Events');
 
 /**
  * The Tile class.
@@ -32,6 +33,12 @@ ol.Tile = function(url, bounds) {
                            this.handleImageLoad, false, this);
     goog.events.listenOnce(this.img_, goog.events.EventType.ERROR,
                            this.handleImageError, false, this);
+
+    /**
+     * @private
+     * @type {ol.event.Events}
+     */
+    this.events_ = new ol.event.Events(this);
 };
 
 /**
@@ -70,6 +77,7 @@ ol.Tile.prototype.getImg = function() {
  * @param {goog.events.BrowserEvent} evt Event.
  */
 ol.Tile.prototype.handleImageLoad = function(evt) {
+    this.events_.triggerEvent('load');
 };
 
 /**
@@ -77,6 +85,7 @@ ol.Tile.prototype.handleImageLoad = function(evt) {
  * @param {goog.events.BrowserEvent} evt Event.
  */
 ol.Tile.prototype.handleImageError = function(evt) {
+    this.events_.triggerEvent('error');
 };
 
 /**

test/spec/ol/Tile.test.js

@@ -1,14 +1,41 @@
 describe("ol.Tile", function() {
 
-    describe("creating a tile", function() {
+    describe("create a tile", function() {
+        var tile;
+        beforeEach(function() {
+            tile = new ol.Tile('http://a.url');
+        });
         it("creates a tile instance", function() {
-            var tile = new ol.Tile();
             expect(tile).toBeA(ol.Tile);
         });
         it("sets an image node in the instance", function() {
-            var tile = new ol.Tile();
             expect(tile.getImg()).toBeDefined();
         });
     });
 
+    describe("handle image load", function() {
+        var tile;
+        beforeEach(function() {
+            tile = new ol.Tile('http://a.url');
+        });
+        it("fires a load event", function() {
+            var spy = jasmine.createSpy();
+            tile.events_.register('load', spy);
+            tile.handleImageLoad();
+            expect(spy).toHaveBeenCalled();
+        });
+    });
+
+    describe("handle image error", function() {
+        var tile;
+        beforeEach(function() {
+            tile = new ol.Tile('http://a.url');
+        });
+        it("fires a load event", function() {
+            var spy = jasmine.createSpy();
+            tile.events_.register('error', spy);
+            tile.handleImageError();
+            expect(spy).toHaveBeenCalled();
+        });
+    });
 });