MC-33593: The style of cart icon is broken

Author: viktorpetryk

app/code/Magento/Ui/view/base/web/js/block-loader.js

@@ -15,14 +15,18 @@ define([
         blockContentLoadingClass = '_block-content-loading',
         blockLoader,
         blockLoaderClass,
-        loaderImageHref;
+        blockLoaderElement = $.Deferred(),
+        loaderImageHref = $.Deferred();
 
     templateLoader.loadTemplate(blockLoaderTemplatePath).done(function (blockLoaderTemplate) {
-        blockLoader = template($.trim(blockLoaderTemplate), {
-            loaderImageHref: loaderImageHref
+        loaderImageHref.done(function (loaderHref) {
+            blockLoader = template($.trim(blockLoaderTemplate), {
+                loaderImageHref: loaderHref
+            });
+            blockLoader = $(blockLoader);
+            blockLoaderClass = '.' + blockLoader.attr('class');
+            blockLoaderElement.resolve();
         });
-        blockLoader = $(blockLoader);
-        blockLoaderClass = '.' + blockLoader.attr('class');
     });
 
     /**
@@ -70,7 +74,7 @@ define([
     }
 
     return function (loaderHref) {
-        loaderImageHref = loaderHref;
+        loaderImageHref.resolve(loaderHref);
         ko.bindingHandlers.blockLoader = {
             /**
              * Process loader for block
@@ -81,9 +85,9 @@ define([
                 element = $(element);
 
                 if (ko.unwrap(displayBlockLoader())) {
-                    addBlockLoader(element);
+                    blockLoaderElement.done(addBlockLoader(element));
                 } else {
-                    removeBlockLoader(element);
+                    blockLoaderElement.done(removeBlockLoader(element));
                 }
             }
         };

dev/tests/js/jasmine/assets/app/code/Magento/Ui/base/templates/block-loader.html

@@ -0,0 +1,5 @@
+<div data-role="loader" class="loading-mask" style="position: absolute;">
+    <div class="loader">
+        <img src="<%= loaderImageHref %>" alt="Loading..." title="Loading..." style="position: absolute;">
+    </div>
+</div>

dev/tests/js/jasmine/tests/app/code/Magento/Ui/base/js/block-loader.test.js

@@ -0,0 +1,80 @@
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+define([
+    'squire',
+    'jquery',
+    'text!tests/assets/app/code/Magento/Ui/base/templates/block-loader.html'
+], function (Squire, $, blockLoaderTmpl) {
+    'use strict';
+
+    var injector = new Squire(),
+        mocks = {
+            'Magento_Ui/js/lib/knockout/template/loader': {
+                /** Method stub. */
+                loadTemplate: function () {
+                    var defer = $.Deferred();
+
+                    defer.resolve(blockLoaderTmpl);
+
+                    return defer;
+                }
+            }
+        },
+        obj,
+        ko;
+
+    beforeEach(function (done) {
+        injector.mock(mocks);
+        injector.require(['Magento_Ui/js/block-loader', 'ko'], function (blockLoader, knockout) {
+            obj = blockLoader;
+            ko = knockout;
+            done();
+        });
+    });
+
+    afterEach(function () {
+        try {
+            injector.clean();
+            injector.remove();
+        } catch (e) {
+        }
+    });
+
+    describe('Magento_Ui/js/block-loader', function () {
+        var blockContentLoadingClass = '_block-content-loading',
+            loaderImageUrl = 'https://static.magento.com/loader.gif',
+            element = $('<span data-bind="blockLoader: isLoading"/>'),
+            isLoading,
+            context;
+
+        beforeEach(function () {
+            isLoading = ko.observable();
+            context = ko.bindingContext.prototype.createChildContext({
+                isLoading: isLoading
+            });
+            obj(loaderImageUrl);
+            $('body').append(element);
+            ko.applyBindings(context, element[0]);
+        });
+
+        afterEach(function () {
+            element.remove();
+        });
+
+        it('Check adding loader block to element', function () {
+            isLoading(true);
+            expect(element.hasClass(blockContentLoadingClass)).toBeTruthy();
+            expect(element.children().attr('class')).toEqual('loading-mask');
+            expect(element.find('img').attr('src')).toEqual(loaderImageUrl);
+        });
+
+        it('Check removing loader block from element', function () {
+            isLoading(false);
+            expect(element.hasClass(blockContentLoadingClass)).toBeFalsy();
+            expect(element.children().length).toEqual(0);
+        });
+    });
+});