Question

我有一个基本的第三方服务，我正在尝试对其进行单元测试。我无法将其发送到throwError。

示例

angular.module('example')
   .factory('exampleFactory', ['$window', function($window) {
        if(typeof $window.examplePlugin === 'undefined') {
           throw new Error('plugin not available');
        } else {
          return $window.examplePlugin;
        }
   }]);

单元测试

describe('Factory', function() {
   var $window, exampleFactory;

   beforeEach(module('example'));

   beforeEach(function() {

      module(function($provide) {
          $provide.value('$window', {});
      });

      inject(function(_$window_, _exampleFactory_) {
         exampleFactory = _exampleFactory_;
         $window = _$window_;
      });
   });

   it('should exist', function() {
      $window.examplePlugin = {};
      expect($window.examplePlugin).toBeDefined();
   });

   it('should throw an error', function() {
      function fn() { delete $window.examplePlugin; }
      expect(fn).toThrowError();
   });
});

Answer 1

鉴于你所展示的内容，我只能想到这个

describe('Factory', function() {
    var $window;

    beforeEach(module('example', function($provide) {
        $provide.value('$window', $window = {});
    });

    it('returns examplePlugin if it is set', function() {
        $window.examplePlugin = 'foo';
        inject(function(exampleFactory) {
            expect(exampleFactory).toBe($window.examplePlugin);
        });
    });

    it('throws an error if examplePlugin is not set', function() {
        // not entirely sure I have this wrapped correctly
        // but trial and error should get you there
        expect(function() {inject(function(exampleFactory) {})}).toThrow();
    });
});

主要的是你需要在注射工厂之前设置所需的$window属性。

使用带有Angular的$ window的单元测试基本工厂

1 个答案: