karma: TypeError: Cannot read property 'prototype' of undefined

Question

每当我尝试注入 service 时，我都会收到以下错误。

(function () {

    describe('Test', function () {

        var $scope, $state, service,ctrl;

        beforeEach(function() {
            module('moduleApp');

            module(function($provide) {
                $provide.service('AppService', service);
            });

            inject(function($rootScope,$injector,$controller,AppService) {
                $scope = $rootScope.$new();
                $state = $injector.get('$state');
                service = $injector.get('AppService');
                ctrl = $controller('MyCtrl', {
                    $scope: $scope,
                    $state: $state,
                    AppService: service
                });
            });
        });


        it('should have a working UserSession service', function() {
            expect(service).to.exist;
        });


    });

}());

错误：

TypeError: Cannot read property 'prototype' of undefined
    at Object.instantiate (bower_components/angular/angular.js:4577:82)
    at Object.<anonymous> (bower_components/angular/angular.js:4438:24)
    at Object.invoke (bower_components/angular/angular.js:4570:17)
    at Object.enforcedReturnValue [as $get] (bower_components/angular/angular.js:4422:37)
    at Object.invoke (bower_components/angular/angular.js:4570:17)
    at bower_components/angular/angular.js:4387:37
    at getService (bower_components/angular/angular.js:4529:39)
    at Object.invoke (bower_components/angular/angular.js:4561:13)
    at Context.workFn (bower_components/angular-mocks/angular-mocks.js:2524:20)
    at window.inject.angular.mock.inject (bower_components/angular-mocks/angular-mocks.js:2496:37)
Error: Declaration Location
    at window.inject.angular.mock.inject (bower_components/angular-mocks/angular-mocks.js:2489:25)
    at Context.<anonymous> (test/unit/app/views/Test.js:17:13)

Answer 1

你想干什么？！首先你告诉 karma 使用一个未定义的对象 service 作为 AppService 然后你尝试从注入器中获取 AppService 并将其分配给 service？这是一个循环。

如果被测单元是AppService，就不需要这样了：

module(function($provide) {
    $provide.service('AppService', service);
});

如果您需要这项服务，您只需这样做：

inject(function($rootScope,$injector,$controller, _AppService_) {
    $scope = $rootScope.$new();
    $state = $injector.get('$state');
    service = _AppService_;
    ctrl = $controller('MyCtrl', {
        $scope: $scope,
        $state: $state,
        AppService: service
    });
});

如果被测单元依赖AppService，你先构建一个模拟服务，然后使用provide，记住你不需要再次注入它。

karma: TypeError: Cannot read property 'prototype' of undefined

karma: TypeError: Cannot read property 'prototype' of undefined

javascript

angularjs

karma-runner

karma-mocha