4

我试图测试当一个元素被点击时,一个函数被调用。看起来很容易,但我一定错过了一些愚蠢的东西,因为我似乎无法让这个简单的例子工作。

这是我的看法

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

本次运行的结果是:

错误:预计已调用 showDetails 上的间谍。在新的 (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://localhost:57708/JobMgr2/test-js/spec/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:为完整性添加夹具模板:

<script type="text/template" id="WorkstationSummary">
    <h3>{{ name }} ({{ assigned }}/{{ inProgress }}/{{ completed }})</h3>
    <ul>
    </ul>
</script>
4

2 回答 2

5

如果您为方法创建一个间谍,在运行测试时,而不是调用实际的方法,间谍会被调用。spy 是该方法的包装器。但这里的问题是您在创建间谍之前创建了视图。所以实际的方法被调用而不是间谍。您要做的是在创建视图对象之前创建间谍。我使用sinon.js来监视这些方法。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();
于 2012-04-29T07:39:26.977 回答
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”可能会导致范围界定问题。这是一个疯狂的猜测,我没有测试过,但我认为值得一试。祝你好运!

于 2011-11-30T07:56:50.007 回答