angularjs - 如何使用 jasmine 测试 John papa vm.model 单元测试？

Question

我使用 John papa Angular 风格指南我的 Controller 看起来像:

遵循风格John papa style controller style guide :

function testController() {

    var vm = this;

    vm.model = { name: "controllerAs vm test" };
}

我的测试代码如下所示:

describe('Controller: testController', function () {

    beforeEach(module('myApp'));

    var testController;

    beforeEach(inject(function ($controller) {
        scope = {};

        testController = $controller('testController', {
        });

    }));

    it('should have vm.model defined and testController.vm.model is equal to controllerAs vm test', function () { 
        expect(testController.vm).toBeDefined();  
        expect(testController.vm.model).toBeDefined();     
        expect(testController.vm.model.name).toEqual("controllerAs vm test");
    });
});

结果:

测试失败:结果消息:预期未定义已定义。 在堆栈中

所以我的问题是我们如何测试 vm.model 和其他变量？我在指南中没有找到合适的指南:controllers

Answer 1

通过 vm = this;，vm 等于实例本身

因此，所有属性都直接卡在对象上。

function foo(){
  var vm = this;

  vm.name = 'Josh';
}

var myFoo = new foo();
myFoo.name; // 'Josh';

因此，您需要做的就是改变您的期望以删除 vm 属性。

expect(testController).toBeDefined();  
expect(testController.model).toBeDefined();     
expect(testController.model.name).toEqual("controllerAs vm test");

为了证明这一点，这是您的确切示例以及相关的 Jasmine 测试。

function testController() {

  var vm = this;

  vm.model = {
    name: "controllerAs vm test"
  };
}


angular.module('myApp', [])
  .controller('testController', testController);

describe('Controller: testController', function() {

  beforeEach(module('myApp'));

  var testController;

  beforeEach(inject(function($controller) {
    scope = {};

    testController = $controller('testController', {});

  }));

  it('should have model defined and testController.model.name is equal to controllerAs vm test', function() {
    expect(testController).toBeDefined();
    expect(testController.model).toBeDefined();
    expect(testController.model.name).toEqual("controllerAs vm test");
  });

  it('should not have a property called vm', function() {
    expect(testController.vm).toBeUndefined();
  });
});

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