Karma testing: TypeError: Attempted to assign to readonly property

Question

当我试图对我的控制器进行单元测试时，我得到了 error.When 我调试了测试用例的预期，我得到了预期的值，但是它失败了，低于 error.What 我是不是错过了这里或者是否我以错误的方式测试控制器变量？

我的规格文件如下

'use strict';
describe('Information.controller', function () {
beforeEach(angular.mock.module('asp'));
var InformationController, scope;

beforeEach(inject(function($controller, $rootScope) {
    scope = $rootScope.$new();
    InformationController = $controller('InformationController', {
        $scope: scope
    });
}));

fit('Should remove the object without info from the  object', function () {
    InformationController.Data = [
        {
            "ban": "03745645455",
            "accountNo": "0000drgyt456456565",
            "id": "2c4cc5e8-f360367"
        },
        {
            "ban": "27346fgh9080",
            "accountNo": "000456456ytr655680",
            "id": "2c4cc8ae-50bbf360367"
        }
    ];
    InformationController.banList = InformationController.Data.map((value, index) => (value && value.ban ? {'id': index, 'text': value.ban} : null))
    .filter(value => value);
    expect(InformationController.banList.length).toBe(3);
});
});

Answer 1

只读错误是由 scope.page（在我的 InformationController 中）未定义引起的，然后代码试图将属性分配给 undefined.Hence 修改后的 beforeEach 块，如下所示

beforeEach(inject(function ($controller, $rootScope) {
        scope = $rootScope.$new();
        scope.page3 = {};
        InformationController = $controller('InformationController', {
            $scope: scope
        });
    }));

这解决了问题。

Karma testing: TypeError: Attempted to assign to readonly property

Karma testing: TypeError: Attempted to assign to readonly property

unit-testing

angularjs

angularjs-controller

karma-jasmine