Backbone.js和Jasmine Spys没有被调用

Question

我试图测试单击一个元素时,调用一个函数.它似乎很容易,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);

这是我的茉莉花测试:

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();
        });
    });
});

这次运行的结果是:

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)at [object Object] .toHaveBeenCalled(http:// localhost:57708/JobMgr2/object-js/lib/jasmine-1.0.2/jasmine.js:1171:29)在[object Object].(http:// localhost:57708/JobMgr2/test-js/spec/LaserMonitorSpec.js:33:34)at [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fixture模板:

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

Answer 1

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.我用sinon.js监视方法.并且您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();