单元测试的Windows 8 Store应用UI（XAML控件） [英] Unit Testing Windows 8 Store App UI (Xaml Controls)

问题描述

我已经创建一个Windows Store应用，但我有问题线程测试它创建了一个网格（这是一个XAML控制）的方法。
我已经试图测试使用NUnit和MSTest的。

测试方法是：

  [TestMethod的] 
酒店的公共空间CreateThumbnail_EmptyLayout_ReturnsEmptyGrid（）
 {
布局L =新的布局（）; 
 ThumbnailCreator创造者=新ThumbnailCreator（）; 
格之格= creator.CreateThumbnail（L，192，120）; 
 
诠释计数= grid.Children.Count; 
 Assert.AreEqual（计数，0）; 
} 
  

而creator.CreateThumbnail（这引发错误的方法）：

 公共电网CreateThumbnail（布局升，双totalWidth，双totalHeight）
 {
电网newGrid =新的网格（ ）; 
 newGrid.Width = totalWidth; 
 newGrid.Height = totalHeight; 
 
的SolidColorBrush backGroundBrush =新的SolidColorBrush（BackgroundColor中）; 
 newGrid.Background = backGroundBrush; 
 
 newGrid.Tag = 1; 
返回newGrid; 
} 
  

当我运行这个测试，它抛出这个错误：

  System.Exception的：应用程序调用被编组为不同的线程的接口。 （从HRESULT异常：0x8001010E（RPC_E_WRONG_THREAD））
  

解决方案

您控制相关的代码需要在UI线程上运行。尝试：

  [TestMethod的] 
异步公共任务CreateThumbnail_EmptyLayout_ReturnsEmptyGrid（）
 {
诠释计数= 0; 
等待ExecuteOnUIThread（（）=> 
 {
布局L =新的布局（）; 
 ThumbnailCreator创造者=新ThumbnailCreator（）; 
格之格=创造者。 CreateThumbnail（L，192，120）; 
计数= grid.Children.Count; 
}）; 
 
 Assert.AreEqual（计数，0）; 
} 
 
公共静态IAsyncAction ExecuteOnUIThread（Windows.UI.Core.DispatchedHandler动作）
 {
返回Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher .RunAsync（Windows.UI.Core.CoreDispatcherPriority.Normal，动作）; 
} 
  

以上应MS测试工作。我不知道NUnit的。

I've been creating a Windows Store App but I have thread problems testing a method which creates a Grid (Which is a XAML Control). I've tried to test using NUnit and MSTest.

The test method is:

[TestMethod]
public void CreateThumbnail_EmptyLayout_ReturnsEmptyGrid()
{
    Layout l = new Layout();
    ThumbnailCreator creator = new ThumbnailCreator();
    Grid grid = creator.CreateThumbnail(l, 192, 120);

    int count = grid.Children.Count;
    Assert.AreEqual(count, 0);
}  

And the creator.CreateThumbnail (The method which throws the error):

public Grid CreateThumbnail(Layout l, double totalWidth, double totalHeight)
{
     Grid newGrid = new Grid();
     newGrid.Width = totalWidth;
     newGrid.Height = totalHeight;

     SolidColorBrush backGroundBrush = new SolidColorBrush(BackgroundColor);
     newGrid.Background = backGroundBrush;

     newGrid.Tag = l;            
     return newGrid;
}

When I run this test it throws this error:

System.Exception: The application called an interface that was marshalled for a different thread. (Exception from HRESULT: 0x8001010E (RPC_E_WRONG_THREAD))

解决方案

Your controls related code needs to be run on a UI thread. Try:

[TestMethod]
async public Task CreateThumbnail_EmptyLayout_ReturnsEmptyGrid()
{
    int count = 0;
    await ExecuteOnUIThread(() =>
    {
        Layout l = new Layout();
        ThumbnailCreator creator = new ThumbnailCreator();
        Grid grid = creator.CreateThumbnail(l, 192, 120);
        count = grid.Children.Count;
    });

    Assert.AreEqual(count, 0);
}

public static IAsyncAction ExecuteOnUIThread(Windows.UI.Core.DispatchedHandler action)
{
    return Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, action);
}

The above should work on MS Test. I don't know about NUnit.

这篇关于单元测试的Windows 8 Store应用UI（XAML控件）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！