如何显示单元测试jquery对话框？

我写了下面的代码，尝试测试jquery对话框是否被释放并显示

var jqueryMock = sinon.mock(jQuery);
var dialogExpectation = jqueryMock.expects("dialog");
dialogExpectation.once();

//call my function, in which create a jquery dialog.

equals(dialogExpectation.verify(), true, "Dialog is displayed");
jqueryMock.restore();   

但是，它向我显示了错误： 在测试#1时死亡：尝试将未定义属性对话框包装为函数-{“消息”：“尝试将未定义属性对话框包装为函数”，“名称”：“TypeError”}

jquery代码非常简单：

displayMessage: function (message, title, hashId) { 

//some logic to build the message, title and hashId.  

 $(messageDiv).dialog({
            height: 240,
            width: 375,
            modal: true,
            title: title,
            resizable: false,
            buttons: [{
                text: localizedErrorMessages['OkText'],
                click: function () {
                    $(this).dialog("close");
                }
            }]             
        }); // end of dialog            
    } // end of displayMessage

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有人知道如何在这种情况下模拟jquery对话框和编写单元测试吗？

您需要像这样模拟jquery.fn：

var jQueryMock = sinon.mock(jQuery.fn);

我创建了一个示例来演示有效的答案

function displayMessage(message, title, hashId) { 

     $("#message").dialog(); 
} 

test("dialog was called", function() {

    var jQueryMock = sinon.mock($.fn); // jQuery.fn and $.fn are interchangeable
    var dialogExpectation = jQueryMock.expects("dialog");
    dialogExpectation.once();

    //call my function, in which create a jquery dialog.
    displayMessage("new message", "title", 1);

    equal(dialogExpectation.verify(), true, "Dialog was not displayed");
    jQueryMock.restore();   
});

// This demonstrates a failing test - since the method actuall calls "dialog".
// It also demonstrates a more compact approach to creating the mock
test("toggle was called", function() {

    var mock = sinon.mock(jQuery.fn).expects("toggle").once();
    displayMessage("new message", "title", 1);

    equal(mock.verify(), true, "Toggle was never called");
});

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这是什么样的测试框架？