toEqualData匹配器在AngularJS应用程序中断测试

Question

我为AngularJS应用程序的服务编写了以下非常简单的测试:

describe('Services', function () { 

    beforeEach(function(){
        this.addMatchers({
            toEqualData: function(expected) { 
                return angular.equals(this.actual, expected);
            }
        });
    });

    beforeEach(module('myapp.services'));

    describe('Album service', function(){
        var Album;

        beforeEach(inject(function (_Album_) { 
            Album = _Album_;
        }));

        it('can get an instance of the Album factory', inject(function (Album) { 
            expect(Album).toBeDefined();
        }));
    });
});

我刚刚在AngularJS文档中建议添加了自定义toEqualData匹配器.然而,这打破了测试.我正在使用Gulp来运行测试gulp-karma(虽然如果我直接使用Karma会出现同样的问题),并且我看到以下错误消息:

$ gulp test
[10:00:04] Using gulpfile ~/Projects/myapp/gulpfile.js
[10:00:04] Starting 'jshint'...
[10:00:04] Starting 'karma'...
WARN `start` method is deprecated since 0.13. It will be removed in 0.14. Please use
  server = new Server(config, [done])
  server.start()
instead.
31 07 2015 10:00:04.362:INFO [karma]: Karma v0.13.3 server started at http://localhost:9876/
31 07 2015 10:00:04.368:INFO [launcher]: Starting browser PhantomJS
[10:00:04] Finished 'jshint' after 277 ms
31 07 2015 10:00:04.631:INFO [PhantomJS 1.9.8 (Linux 0.0.0)]: Connected on socket sFxRfQ6bJtqM_utNAAAA with id 27252937
PhantomJS 1.9.8 (Linux 0.0.0) Services Album service can get an instance of the Album factory FAILED
        TypeError: 'undefined' is not a function (evaluating 'this.addMatchers')
            at /home/matthew/Projects/myapp/tests/services.tests.js:7
PhantomJS 1.9.8 (Linux 0.0.0): Executed 7 of 7 (1 FAILED) (0.04 secs / 0.022 secs)
[10:00:04] Finished 'karma' after 558 ms
[10:00:04] Starting 'test'...
[10:00:04] Finished 'test' after 11 ?s

我无法看到我出错的地方.有任何想法吗？它实际上工作正常,如果我拿出自定义匹配器,我还没有实际使用,但计划这样做.所以似乎匹配器是罪魁祸首,但由于它从字面上复制并粘贴在Angular文档中,所以我不知道为什么它不起作用.

Answer 1

最终解决了这个问题.事实证明,Jasmine API已经在1.3和2.0之间进行了更改,而AngularJS文档似乎没有提供任何有关此内容的信息.以下是我如何修复问题,以便其他任何坚持这一点的人都可以找到一个可行的解决方案:

describe('Services', function () { 

    beforeEach(function(){
        jasmine.addMatchers({
            toEqualData: function(util, customEqualityTesters) { 
                return { 
                    compare: function(actual, expected) { 
                        return { 
                            pass: angular.equals(actual, expected)
                        };
                    } 
                };
            } 
        });
    });

    beforeEach(module('myapp.services'));

    describe('Album service', function(){
        var Album;

        beforeEach(inject(function (_Album_, _$httpBackend_) { 
            Album = _Album_;
            mockBackend = _$httpBackend_;
        }));

        it('can get an instance of the Album factory', inject(function (Album) { 
            mockBackend.expectGET('https://myapp.com/api/albums').respond([{id: 1}, {id: 2}]);
            expect(Album).toBeDefined();
            var albums = Album.query();
            mockBackend.flush();
            expect(albums).toEqualData([{id: 1}, {id: 2}]);
        }));
    });
});

基本上,你要做的就是改变this了jasmine当您添加的匹配,通过actual与expected作为参数传递给函数,使用他们,而不是this.似乎现在按预期工作.

编辑:原来这不起作用,它只是默默地失败.我现在纠正了它.