add an ol.Tile class

test/spec/ol/Tile.test.js

@@ -0,0 +1,24 @@
+describe("ol.Tile", function() {
+
+    describe("creating a tile", function() {
+        it("creates a tile instance", function() {
+            var tile = new ol.Tile();
+            expect(tile instanceof ol.Tile).toBe(true);
+        });
+        it("sets an image node in the instance", function() {
+            var tile = new ol.Tile();
+            expect(tile.getImg()).toBeDefined();
+        });
+    });
+
+    describe("setting a source", function() {
+        var tile;
+        beforeEach(function() {
+            tile = new ol.Tile();
+        });
+        it("sets the image source", function() {
+            tile.setImgSrc("http://foo/img");
+            expect(tile.getImg().src).toEqual("http://foo/img");
+        });
+    });
+});