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gaia/apps/sharedtest/test/unit/homescreens/icon_test.js

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+'use strict';
+
+/* global Icon, GridIconRenderer, MocksHelper */
+/* global require, suite, test, assert, sinon */
+
+require('/shared/elements/gaia_grid/js/grid_icon_renderer.js');
+require('/shared/test/unit/mocks/mock_image.js');
+
+require('/shared/js/homescreens/icon.js');
+
+var mocksHelperForIcon = new MocksHelper([
+  'Image'
+]).init();
+
+suite('icon.js >', function() {
+
+  mocksHelperForIcon.attachTestHelpers();
+
+  test('it sets the background size when there is not an icon', function() {
+    var element = document.createElement('img');
+    var subject = new Icon(element);
+    subject.render();
+
+    var backgroundSize = element.style.backgroundSize;
+    assert.isTrue(backgroundSize.contains(subject.size / 10));
+  });
+
+  test('it sets the background image when there is an icon', function() {
+    var fakeBlob = new Blob([], {type: 'image/png'});
+    var fakeURL = URL.createObjectURL(fakeBlob);
+    sinon.stub(URL, 'createObjectURL').returns(fakeURL);
+
+    var realPromise = window.Promise;
+    window.Promise = function() {
+      return {
+        then: function(resolve) {
+          resolve(fakeBlob);
+        }
+      };
+    };
+
+    var imageSpy = this.sinon.spy(window, 'Image');
+
+    var element = document.createElement('img');
+    var subject = new Icon(element, 'http://myweb/xxx.png');
+    subject.render();
+
+    sinon.stub(GridIconRenderer.prototype, 'favicon', function() {
+      return {
+        then: function(resolve) {
+          resolve(fakeBlob);
+        }
+      };
+    });
+
+    imageSpy.lastCall.thisValue.triggerEvent('onload');
+
+    var backgroundImage = element.style.backgroundImage;
+    assert.equal(backgroundImage, 'url(\"' + fakeURL + '\")');
+
+    window.Promise = realPromise;
+    GridIconRenderer.prototype.favicon.restore();
+    URL.createObjectURL.restore();
+  });
+
+});