TypeError:无法读取属性' firstName'未定义的单元测试AngularJS

时间:2017-09-28 15:42:58

标签: javascript angularjs unit-testing karma-mocha gulp-karma

我很难与Karma一起进行单元测试,我不知道如何进行单元测试,因为这是我的第一次。我使用的是AngularJS,单元测试是Karma。

事情是这样的:我使用服务获取客户的firstName,lastName和PhoneNumber以在我的表单中显示,并且它没有任何问题,但是当我尝试做的时候单元测试错误总是这样:

directionFormulation component should load customer profile FAILED
        TypeError: Cannot read property 'firstName' of undefined

directionFormulation.js

  function directionFormulationController(event, customer, resolveLocation, order) {
    this.$onInit = onInit;
    this.input = this.input || {};

    function onInit() {
      loadCustomerData();
    }

    function loadCustomerData() {
      this.input.firstName = order.customer.firstName;
      this.input.lastName = order.customer.lastName;
      this.input.phoneNumber = order.customer.phoneNumber;

    }
  }
})();

单元测试:directionFormulation.spec.js:

  it('should load customer data', function () {
    var emptyFirstName = { firstName: 'something'};

    component.$onInit();
    order.customer.firstName = { firstName: 'Something'};
    order.customer.lastName = { lastName: 'Something' };
    order.customer.phoneNumber = { phoneNumber: 55555555};
    // component.input = {
    //   firstName: 'something',
    //   lastName: 'something',
    //   phoneNumber: 55555555
    // };

    component.loadCustomerData();
    $rootScope.$apply();
    component.input.firstName = newFirstName;

    expect(component.input.firstName).to.be.equal({firstName: 'something'});
    expect(component.input.lastName).to.be.not.empty;
    expect(component.input.phoneNumber).to.be.null;

  });
});

1 个答案:

答案 0 :(得分:1)

您正在向控制器中注入order,因此您需要"模拟"出order进行单元测试:

describe('addressForm component', function () {
  var component;
  var scope;
  var order;

  beforeEach(function () {
    bard.appModule('shopping.address');
    bard.inject('$rootScope', '$componentController', '$q', 'resolveLocation', 'customer', 'event','order');
    order = {
      customer: {
        firstName: 'Joe',
        lastName: 'Smith',
        phoneNumber: '416-555-1234'
      }
    };
    scope = $rootScope.$new();
    component = $componentController('addressForm', { 
      $scope: scope,
      order: order
    });
  });

  it('should be attached to the scope', function () {
    expect(scope.addressForm).to.be.equal(component);
  });

  it('should load customer profile', function () {
    component.$onInit();
    component.loadCustomerProfile();

    expect(component.input.firstName).to.be.equal(order.customer.firstName);
    expect(component.input.lastName).to.be.equal(order.customer.lastName);
    expect(component.input.phoneNumber).to.be.equal(order.customer.phoneNumber);
  });
});

我想强调一些其他问题:

  1. 您的第一个测试断言expect(scope.addressForm).to.be.equal(component);不会通过。 AddressFormController是控制器的名称,控制器是组件的属性。

  2. 我不确定您的测试中bard指的是什么,并且不确定appModule是否是您的bard实例上的属性。以下是我的组件测试设置示例:https://gist.github.com/mcranston18/0ded29eca9a53efeb945736b0a053061

  3. 我建议使用此资源来学习有关测试组件控制器的更多信息:http://www.codelord.net/2017/01/09/unit-testing-angular-components-with-%24componentcontroller/