如何调用WPF调度员在NUnit的？ [英] How to invoke WPF Dispatcher in Nunit?

问题描述

我要测试这使得与数据字段值的文本块的应用程序。我想获得的实际宽度和实际高度，一旦呈现完成。一切工作正常。问题就来了第一次，当我试图测试应用程序。我无法从调用测试项目调度。

I want to test an application which renders a text block with a data field value. I would like to get the actual width and actual height, once the rendering completes. Everything works fine. The problem came first, when I tried to test the application. I'm unable to invoke the dispatcher from the test project.

以下是代码。

this.Loaded += (s, e) =>
{
    TextBlock textBlock1 = new TextBlock();

    //// Text block value is assigned from data base field.
    textBlock1.Text = strValueFromDataBaseField;        
    //// Setting the wrap behavior.
    textBlock1.TextWrapping = TextWrapping.WrapWithOverflow;
    //// Adding the text block to the layout canvas.
    this.layoutCanvas.Children.Add(textBlock1);

    this.Dispatcher.BeginInvoke(DispatcherPriority.Background,
        (Action)(() =>
            {
                //// After rendering the text block with the data base field value. Measuring the actual width and height.
               this.TextBlockActualWidth = textBlock1.ActualWidth;
               this.TextBlockActualHeight = textBlock1.ActualHeight;

               //// Other calculations based on the actual widht and actual height.
            }
        ));
};

我刚刚使用NUnit的开始。所以，请帮助我。

I've just started using the NUnit. So, please help me.

感谢

推荐答案

我的天堂 t一起使用NUnit的编写前的单元测试，但是这是在VS单元测试的常见问题。有什么可以最终发生的是每个测试使用不同的调度和WPF要求使用同样的调度。为了解决这个问题，创建一个静态类缓存调度，然后通过它调用了一切。

I haven't used nUnit to write unit tests before, but this is a common problem with VS unit tests. What can end up happening is that each test uses a different dispatcher and WPF requires you to use the same dispatcher. To get around this, create a static class to cache the Dispatcher and then invoke everything through it.

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