如何用茉莉花测试John papa vm.model单元测试？

Question

我使用John papa angular style guide我的控制器看起来像:

遵循风格约翰爸爸风格控制器风格指南:

function testController() {

    var vm = this;

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

我的测试代码如下:

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:预期未定义要定义.在堆栈

所以我的问题是我们如何测试vm.model和其他变量呢？我没有在指南中找到适当的指导线:控制器

Answer 1

该vm等于通过实例本身vm = this;

因此,所有属性都直接悬挂在对象之外.

function foo(){
  var vm = this;

  vm.name = 'Josh';
}

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

所以你需要做的就是改变你对移除vm财产的期望.

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();
  });
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.2.1/jasmine.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.2.1/jasmine.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.2.1/jasmine-html.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.2.1/boot.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0-beta.4/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0-beta.4/angular-mocks.js"></script>

Answer 2

testController 是的vm,因为你设置var vm = this的控制器.因此,为了使您的测试代码更类似于您的控制器代码,您可以尝试将控制器设置vm为测试,而不是 testController

describe('Controller: testController', function () {
    // we work with "vm" instead of "testController" to have consistent verbiage
    // in test and controller
    var vm;

    beforeEach(module('app'));
    beforeEach(inject(function ($controller) {
        vm = $controller('testController', {}, {});
    }));

    it('should have vm.model defined and testController.vm.model is equal to controllerAs vm test', function () {

        // vm=this in controller
        expect(vm)
            .toBeDefined();

        // Testing primitives
        expect(vm.foo)
            .toBeDefined();
        expect(vm.foo)
            .toEqual('bar');

        // Testing objects
        expect(vm.model)
            .toBeDefined();
        expect(vm.model.name)
            .toEqual("Batman");

        // Testing a method
        expect(vm.greet())
            .toBeDefined();
        expect(vm.greet())
            .toEqual('Hello There');
    });
});

控制器代码

(function () {
    'use strict';

    angular
        .module('app')
        .controller('testController', testController);

    /* @ngInject */
    function testController() {
        var vm = this;

        // Primitives
        vm.foo = 'bar';

        // Objects
        vm.model = {
            name: 'Batman'
        };

        // Methods
        vm.greet = function () {
            return 'Hello There';
        };
    }
})();

希望这可以帮助.祝好运.