define(['js/common_helpers/ajax_helpers', 'js/student_account/shoppingcart'],
    function(AjaxHelpers, ShoppingCartInterface) {
        'use strict';

        describe( 'edx.student.account.ShoppingCartInterface', function() {

            var COURSE_KEY = "edX/DemoX/Fall",
                ADD_COURSE_URL = "/shoppingcart/add/course/edX/DemoX/Fall/",
                FORWARD_URL = "/shoppingcart/";

            beforeEach(function() {
                // Mock the redirect call
                spyOn(ShoppingCartInterface, 'redirect').andCallFake(function() {});
            });

            it('adds a course to the cart', function() {
                // Spy on Ajax requests
                var requests = AjaxHelpers.requests( this );

                // Attempt to add a course to the cart
                ShoppingCartInterface.addCourseToCart( COURSE_KEY );

                // Expect that the correct request was made to the server
                AjaxHelpers.expectRequest( requests, 'POST', ADD_COURSE_URL );

                // Simulate a successful response from the server
                AjaxHelpers.respondWithJson( requests, {} );

                // Expect that the user was redirected to the shopping cart
                expect( ShoppingCartInterface.redirect ).toHaveBeenCalledWith( FORWARD_URL );
            });

            it('redirects the user on a server error', function() {
                // Spy on Ajax requests
                var requests = AjaxHelpers.requests( this );

                // Attempt to add a course to the cart
                ShoppingCartInterface.addCourseToCart( COURSE_KEY );

                // Simulate an error response from the server
                AjaxHelpers.respondWithError( requests );

                // Expect that the user was redirected to the shopping cart
                expect( ShoppingCartInterface.redirect ).toHaveBeenCalledWith( FORWARD_URL );
            });
        });
    }
);
