Add basic test for ol.tilegrid.Zoomify

test/spec/ol/tilegrid/zoomifytilegrid.test.js

@@ -0,0 +1,21 @@
+goog.provide('ol.test.tilegrid.Zoomify');
+
+describe('ol.tilegrid.Zoomify', function() {
+
+  describe('constructor', function() {
+
+    it('can be constructed with minimal arguments', function() {
+      var instance = new ol.tilegrid.Zoomify({
+        resolutions: [],
+        extent: [],
+        origin: [],
+        tileSize: []
+      });
+      expect(instance).to.be.an(ol.tilegrid.Zoomify);
+    });
+
+  });
+
+});
+
+goog.require('ol.tilegrid.Zoomify');