Angular - 如何使用$ routeChangeStart测试重定向

Question

我添加了一个系统，每当URL更改用户是否未登录时都会测试，如果是，则重定向到登录页面。

我有一个测试失败，因为我添加了一些新代码。

代码：

app.run(function($rootScope, userService, authService) {
    $rootScope.$on('$routeChangeStart', function () {
        if (!userService.isLoggedIn()) {
            authService.login();
            return;
        }
    })
});

测试：

describe('profile module', function() {
    var $scope, $location;    
    beforeEach(module('app'));    
    beforeEach(inject(function($rootScope, $controller, _$httpBackend_) {
        $scope = $rootScope.$new();
        $location = jasmine.createSpyObj('$location', [ 'path' ]);
        $controller('ProfileCtrl', {
            $scope : $scope,
            $location : $location
        });
    }));

    it('should logout and redirect to login page when disconnect', inject(function($httpBackend) {
        $scope.disconnect();
        $httpBackend.expectGET('/logout').respond(200);
        $httpBackend.flush();
        // Not works since new code !
        expect($location.path).toHaveBeenCalledWith('/login');
    }));
});

测试输出：

    .........................
    PhantomJS 1.9.8 (Mac OS X 0.0.0) profile module should logout and redirect to login page when disconnect FAILED
        Expected spy $location.path to have been called with [ '/login' ] but it was never called.
    PhantomJS 1.9.8 (Mac OS X 0.0.0): Executed 26 of 26 (1 FAILED) (0.069 secs / 0.325 secs)
    Warning: Task "karma:unit" failed. Use --force to continue.

我不明白这个问题。 你有什么主意吗？ 提前谢谢。