麻烦 运行 angular 测试中的范围函数

Trouble running a scope function in angular test

我最近开始尝试学习如何测试 angular。我取得了一些成功,但目前我正在尝试测试一个指令,但我似乎无法让它发挥作用。

测试码

describe('navigation test', function(){
var element, location, route, rootScope, scope, httpBackend;
var elm;

beforeEach(module('myApp'));

beforeEach(inject(function($compile,$rootScope,$location,$httpBackend,$route) {


    location = $location;
    scope = $rootScope.$new();

    route = $route;
    $httpBackend.whenGET('partials/nav/nav.html')
        .respond(200);
    element = $compile("<navigation></navigation>")(scope);
    httpBackend = $httpBackend;
    scope.$digest();

}));

describe('Change page function',function(){
    it('should flip the location between /home and /test', function(){
        location.path('/home')
        scope.changePage();
        scope.$digest();
        expect(location.path()).to.equal('/test');
    })
})


});

指令函数

 var app = angular.module('myApp');

 app.directive('navigation', function($location, $q, $sce, $timeout, $mdSidenav, $mdComponentRegistry) {
return {
    restrict: 'E',
    templateUrl: 'partials/nav/nav.html',
    link: function(scope, elements, attrs) {

        scope.changePage = function() {
            if($location.path() == '/home') {
                $location.path('/builder')
            } else {
                $location.path('/home');
            }
        };

}); 我收到的错误是

错误信息

TypeError: 'undefined' is not a function

(正在评估 'scope.changePage()')

我不明白为什么它看不到范围。任何帮助将不胜感激。如果有人可以阐明 angular 测试,那就太好了。

您在构造 directive 时忘记调用 $httpBackend.flush() 来为对 partials/nav/nav.html 的请求提供服务。只需添加它,它应该可以正常工作。

Working fiddle