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尝试用Moq模拟HtmlHelper时引发MissingMethodException

moq mocking unit-testing asp.net-mvc

MedicineMan · 技术社区 · 14 年前

article on mocking the htmlhelper with Moq 我遇到了以下问题。在创建htmlhelper时抛出异常。我只是猜测温莎城堡正在被使用(通过看到错误消息)。

发生MissingMethodException

'类型上的构造函数'Castle.Proxies.ViewContextProxy“找不到。

堆栈跟踪:

在System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr、Binder Binder、Object[]args、CultureInfo culture、Object[]activationAttributes)

代码:

    public static HtmlHelper CreateHtmlHelper(ViewDataDictionary vd)
    {
        Mock<ViewContext> mockViewContext = new Mock<ViewContext>(
                                                new ControllerContext(
                                                    new Mock<HttpContextBase>().Object,
                                                    new RouteData(),
                                                    new Mock<ControllerBase>().Object),
                                                new Mock<IView>().Object,
                                                vd,
                                                new TempDataDictionary());

        Mock<IViewDataContainer> mockViewDataContainer = new Mock<IViewDataContainer>();
        mockViewDataContainer.Setup(v => v.ViewData).Returns(vd);

        return new HtmlHelper(mockViewContext.Object, mockViewDataContainer.Object);
    }

如何解决问题并返回HtmlHelper实例?

2 回复 | 直到 4 年前

anon 10 年前

我已经用我的博客文章中的代码复制了你的问题。以下更新的方法适用于我:

public static HtmlHelper CreateHtmlHelper(ViewDataDictionary vd)
{
    Mock<ViewContext> mockViewContext = new Mock<ViewContext>(
        new ControllerContext(
            new Mock<HttpContextBase>().Object,
            new RouteData(),
            new Mock<ControllerBase>().Object),
        new Mock<IView>().Object,
        vd,
        new TempDataDictionary(),
        new Mock<TextWriter>().Object);

    mockViewContext.Setup(vc => vc.ViewData).Returns(vd);

    var mockViewDataContainer = new Mock<IViewDataContainer>();
    mockViewDataContainer.Setup(v => v.ViewData)
        .Returns(vd);

    return new HtmlHelper(mockViewContext.Object,
                            mockViewDataContainer.Object);
}

我已经贴了一张 update on my blog 也。

Igor Zevaka 14 年前

你得到了吗 MissingMethodException Mock<>()

ViewContext 解释了原因。只有一个构造函数重载,它是:

 public ViewContext(ControllerContext controllerContext, IView view, ViewDataDictionary viewData, TempDataDictionary tempData, TextWriter writer);

此设置(包括缺少的 TextWriter 模拟)应该工作:

   Mock<ViewContext> mockViewContext = new Mock<ViewContext>(
     new ControllerContext(
     new Mock<HttpContextBase>().Object,
     new RouteData(),
     new Mock<ControllerBase>().Object),
     new Mock<IView>().Object,
     vd,
     new TempDataDictionary()
     new Mock<TextWriter>().Object);