Fixing a broken multi-shipping test.

Author: Greg Harvell

dev/tests/js/jasmine/tests/app/code/Magento/Multishipping/frontend/js/multi-shipping.test.js

@@ -68,9 +68,11 @@ define([
             var addNewAddressBtn,
                 addressflag,
                 canContinueBtn,
-                canContinueFlag;
+                canContinueFlag,
+                originalGetJSON;
 
             beforeEach(function () {
+                originalGetJSON = $.getJSON;
                 addNewAddressBtn = $('<button type="button" data-role="add-new-address"/>');
                 addressflag = $('<input type="hidden" value="0" id="add_new_address_flag"/>');
                 canContinueBtn = $('<button type="submit" data-role="can-continue" data-flag="1"/>');
@@ -79,13 +81,20 @@ define([
                     .append(addressflag)
                     .append(canContinueBtn)
                     .append(canContinueFlag);
+
+                $.getJSON = jasmine.createSpy().and.callFake(function () {
+                    var deferred = $.Deferred();
+
+                    return deferred.promise();
+                });
             });
 
             afterEach(function () {
                 addNewAddressBtn.remove();
                 addressflag.remove();
                 canContinueBtn.remove();
                 canContinueFlag.remove();
+                $.getJSON = originalGetJSON;
             });
 
             it('Check add new address event', function () {