Backbone.js和Jasmine Spys没有被调用

时间:2011-11-10 19:59:48

标签: backbone.js jasmine

我正在尝试测试单击一个元素时,调用一个函数。看起来很容易,但我必须错过一些愚蠢的东西,因为我似乎无法让这个简单的例子起作用。

这是我的观点

(function($) {
    window.LaserMonitor = {
        Views: {}
    };

    window.LaserMonitor.Views.WorkstationSummary = Backbone.View.extend({
        tagName: 'li',
        className: 'StationItem',

        initialize: function() {
            _.bindAll(this, 'showDetails');
            this.template = _.template($("#WorkstationSummary").html());
        },

        events: {
            'click h3' : 'showDetails'
        },

        showDetails: function() {
        },

        render: function() {
            var renderedTmpl = this.template(this.model.toJSON());

            $(this.el).append(renderedTmpl);

            return this;
        }
    });
})(jQuery);

这是我的Jasmine测试:

describe('WorkstationSummary Item', function() {
    beforeEach(function() {
        _.templateSettings = {
          interpolate: /\{\{(.+?)\}\}/g,
          evaluate: /\{\{(.+?)\}\}/g
        };      

        loadFixtures('LaserMonitorFixture.html');

        this.model = new Backbone.Model({
            id: 1,
            name: 'D8',
            assigned: 1900,
            inProgress: 4,
            completed: 5
        });

        this.view = new window.LaserMonitor.Views.WorkstationSummary({model: this.model});
    });

    describe('Events', function() {
        beforeEach(function() {
            this.view.render();
        });

        it('should trigger click event', function() {
            this.header = this.view.$('h3');

            spyOn(this.view, 'showDetails');

            this.header.click();

            expect(this.view.showDetails).toHaveBeenCalled();
        });
    });
});

此次运行的结果是:

  

错误:已调用showDetails上的预期间谍。       at new(http:// localhost:57708 / JobMgr2 / test-js / lib / jasmine-1.0.2 / jasmine.js:102:32)       在[object Object] .toHaveBeenCalled(http:// localhost:57708 / JobMgr2 / test-js / lib / jasmine-1.0.2 / jasmine.js:1171:29)       在[object Object]。 (HTTP://本地主机:57708 / JobMgr2 /测试-JS /规格/ LaserMonitorSpec.js:33:34)       在[object Object] .execute(http:// localhost:57708 / JobMgr2 / test-js / lib / jasmine-1.0.2 / jasmine.js:1001:15)       在[object Object] .next_(http:// localhost:57708 / JobMgr2 / test-js / lib / jasmine-1.0.2 / jasmine.js:1790:31)       在http://localhost:57708/JobMgr2/test-js/lib/jasmine-1.0.2/jasmine.js:1780:18

编辑:为completness添加夹具模板:

<script type="text/template" id="WorkstationSummary">
    <h3>{{ name }} ({{ assigned }}/{{ inProgress }}/{{ completed }})</h3>
    <ul>
    </ul>
</script>

2 个答案:

答案 0 :(得分:5)

如果你为方法创建一个间谍,在运行测试时,调用间谍而不是调用实际方法。间谍是该方法的包装器。但问题是你在创建间谍之前创建了视图。所以实际的方法是调用而不是间谍。您需要做的是在创建视图对象之前创建间谍。我使用sinon.js来监视方法。而且你必须使用视图的原型来监视该视图的方法:

var workStationSpy = sinon.spy(window.LaserMonitor.Views.WorkstationSummary.prototype, "showDetails");
this.view = new window.LaserMonitor.Views.WorkstationSummary({model: this.model});
this.view.render();
expect(workStationSpy).toHaveBeenCalled();
workStationSpy.restore();

答案 1 :(得分:0)

我会将其更改为以下内容并尝试:

it('should trigger click event', function() {
    var viewToTest = this.view;
    this.header = viewToTest.$('h3');
    spyOn(viewToTest, 'showDetails');
    this.header.click();
    expect(viewToTest.showDetails).toHaveBeenCalled(); 
});

我担心调用“this.view”可能导致范围问题。这是一个疯狂的猜测,我没有测试,但我认为它值得一试。祝你好运!