如何对DOM操作进行单元测试（使用jasmine）

I need to unit test some DOM manipulation functions with jasmine (currently I run my tests in the browser and with Karma)

我需要用jasmine单元测试一些DOM操作函数（目前我在浏览器和Karma中运行我的测试）

I was wondering what the best approach would be to do this ?

我想知道这样做的最佳方法是什么？

For example, I can mock and stub the window and document objects and spyOn a couple of their functions. But this doesn't really look like an easy solution, so thats why I'm asking this question!

例如，我可以模拟和存根窗口并记录对象并监视它们的一些功能。但这并不是一个简单的解决方案，所以这就是我问这个问题的原因！

Or is there a better way (not using jasmine maybe) to do this ?

或者是否有更好的方法（不使用茉莉花）来做到这一点？

Thanks a lot

非常感谢

2 个解决方案

#1

I've been using a helpful addition to jasmine called jasmine-jquery available on github.

我一直在github上使用一个名为jasmine-jquery的jasmine的有用添加。

It gives you access to a number of useful extra matcher functions, to assert jquery objects and their properties.

它允许您访问许多有用的额外匹配器函数，以断言jquery对象及其属性。

In particular the features I have found useful so far are asserting on attributes of dom elements, and spying on events such as clicks and submits...

特别是到目前为止我发现有用的功能是在dom元素的属性上声明，并且监视诸如点击和提交之类的事件......

Here is a somewhat contrived example... :)

这是一个有点人为的例子...... :)

describe("An interactive page", function() {
    it("'s text area should not contain any text before pressing the button", function() {
        expect(Page.textArea).toBeEmpty();
    });

    it("should contain a text area div", function() {
        expect(Page.textArea).toBe('div#textArea');
    });

    it("should append a div containing a random string to the text area when clicking the button", function() {
        var clickEvent = spyOnEvent('#addTextButton', 'click');
        $('button#addTextButton').click();

        expect('click').toHaveBeenTriggeredOn('#addTextButton');
        expect(clickEvent).toHaveBeenTriggered();

        expect($('div.addedText:last')).not.toBeEmpty());
    });
});

and here is the code:

这是代码：

var Page = {
    title : 'a title',
    description : 'Some kind of description description',
    textArea : $('div#textArea'),
    addButton : $('button#addTextButton'),


    init : function() {
        var _this = this;
        this.addButton.click(function(){
        var randomString = _this.createRandomString();
            _this.addTextToPage(randomString);
        });
    },

    addTextToPage : function( text ) {
        var textDivToAdd = $('<div>').html('<p>'+text+'</p>');

        this.textArea.append( textDivToAdd );
    },

    createRandomString : function() {
        var text = "";
        var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

        for( var i=0; i < 5; i++ )
             text += possible.charAt(Math.floor(Math.random() * possible.length));

        return text;
    },
};

Page.init();

I've found jasmine to be really flexible and agreeable to use so far, I always appreciate pointers for making it the code better though!

我发现茉莉花非常灵活，并且到目前为止都很适合使用，我总是很欣赏能够让代码变得更好的指针！

#2

I was looking for something for myself and finally I made a little library with 19 custom matchers. Maybe you'll find it helpful. https://github.com/devrafalko/jasmine-DOM-custom-matchers

我正在为自己寻找一些东西，最后我用19个自定义匹配器创建了一个小库。也许你会觉得它很有帮助。 https://github.com/devrafalko/jasmine-DOM-custom-matchers

#1