AngualrJS和Karma-如何为工厂编写单元测试?

本文介绍了AngualrJS和Karma-如何为工厂编写单元测试?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在编写一个简单的AngularJS 1.x Web应用程序.

I am writing a simple AngularJS 1.x web app.

我有一个模块:

main.js:

var app = angular.module('app', []);

factory.js

app.factory('DataFactory', function(){

  var DataService = {};

  DataService.something = function() {
    return 5;
  };

  return DataService;

});

controller.js

app.controller('DataController', function ($scope, DataFactory) {
    $scope.searchText = null;
    $scope.results = DataFactory.something();
});

index.html:

<!DOCTYPE html>

<html lang="en">
    <head>
        <meta charset="utf-8">
        <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
</script>
    </head>
    <body ng-app="app" ng-controller="DataController">
        <script src="app.js"></script>
        <script src="factory.js"></script>
        <script src="controller.js"></script>
    </body>
</html>

测试文件:

  describe('Data Factory Test', function() {

    var Factory;

    beforeEach(function() {
      angular.module('app');
    });

    beforeEach(inject(function() {
      var $injector = angular.injector(['app']);
      Factory = $injector.get('DataFactory');
    }));

    it('is very true', function(){
        expect(Factory).toBeDefined();
      // var output = Factory.something();
      // expect(output).toEqual(5);
    });

  });

karma.conf.js:

frameworks: ['jasmine'],


// list of files / patterns to load in the browser
files: [
    'node_modules/angular/angular.js',
    'node_modules/angular-mocks/angular-mocks.js',
    'app.js',
    'factory.js',
    'controller.js',
    'test/*.js'
]

我该如何编写单元测试来检查工厂是否存在，并检查退货情况?

How do I write a unit test to check if the factory exists, and to check the return of something?

运行业力启动时，我不断收到错误消息:错误:[$ injector:modulerr]由于以下原因，无法实例化模块应用程序: 错误:[$ injector:unpr]未知提供程序:$ controllerProvider

I keep getting an error when i run karma start:Error: [$injector:modulerr] Failed to instantiate module app due to: Error: [$injector:unpr] Unknown provider: $controllerProvider

我开始工作了.在有工厂和没有工厂的情况下，我该如何为控制器编写单元测试?

I got it working. How would I write the unit test for the controller with and without a factory?

推荐答案

第一部分显示了如何测试服务/工厂.第二部分展示了控制器测试的两种方式

First part shows how service / factory can be tested.Second part show two ways of controller testing

我们只是希望$ scope中的某些变量已更改
我们希望某些服务/工厂已被呼叫

也许所有这些类型的测试都能满足我们的所有需求.

Probably all those kind of tests covers all our needs.

angular.module('app', []).factory('DataFactory', function() {

  var DataService = {};

  DataService.something = function() {
    return 5;
  };

  return DataService;

}).controller('DataController', function($scope, DataFactory) {
  $scope.searchText = null;
  $scope.results = DataFactory.something();
});

describe('Data Factory Test', function() {
  var Factory;

  beforeEach(module('app'));

  beforeEach(inject(function(_DataFactory_) {
    Factory = _DataFactory_
  }));

  it('is very true', function() {
    expect(Factory).toBeDefined();
    var output = Factory.something();
    expect(output).toEqual(5);
  });
});

describe('DataController ', function() {

  var $scope, instantiateController, DataFactory

  beforeEach(module('app'));

  beforeEach(inject(function($rootScope, $controller, _DataFactory_) {
    $scope = $rootScope.$new()
    DataFactory = _DataFactory_
    instantiateController = function() {
      $controller('DataController', {
        $scope: $scope,
        DataFactory: DataFactory
      })
    }
  }))

  // It shows that controller chenges $scope.results
  it('Calculates results', function() {
    expect($scope.results).toBe(undefined)
    instantiateController()
    expect($scope.results).toBe(5)
  })

  // It shows that DataFactory was called
  it('Calls `DataFactory.something`', function() {
    spyOn(DataFactory, 'something');
    instantiateController()
    expect(DataFactory.something).toHaveBeenCalled()
  })
});

<link href="//safjanowski.github.io/jasmine-jsfiddle-pack/pack/jasmine.css" rel="stylesheet" />
<script src="//safjanowski.github.io/jasmine-jsfiddle-pack/pack/jasmine-2.0.3-concated.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular-mocks.js"></script>

这篇关于AngualrJS和Karma-如何为工厂编写单元测试?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！