在 Silverlight 中,UI 自動化(UIA)的相關內容在下列名稱空間中:
System.Windows.Automation
System.Windows.Automation.Peers
System.Windows.Automation.Provider
要開放某個自定義控件爲支持 UI 自動化的,則需要覆蓋 OnCreateAutomationPeer 這個方法(定義在 Control 類中),來返回一個與該控件對應的 AutomationPeer 子類,實質是一個面向 COM 的 wrapper,用來描述和操作目標控件的一些信息,以及設值/取值等操作(用於模擬鍵盤輸入)。
那麼,這樣做了之後,就可以在 UI Test 的代碼裏通過自動化的接口,來取得這個 wrapper 對象,並進行相應的自動化測試。
可以用 Windows SDK 裏的一個工具 UISpy.exe 來查看 UI 結構信息(http://blogs.msdn.com/windowssdk/archive/2008/02/18/where-is-uispy-exe.aspx)
相關一些代碼摘錄如下:
{
public SearchBar()
{
this.GotFocus += (sender, args)
=>
{
this.SearchText.Focus();
};
InitializeComponent();
}
protected override AutomationPeer OnCreateAutomationPeer()
{
return new SearchBarAutomationPeer(this);
}
}
{
public SearchBarAutomationPeer(SearchBar searchBar) : base(searchBar)
{
}
protected override string GetAutomationIdCore()
{
return "SearchBar"; // You're going to want to make this unique. ;)
}
protected override string GetClassNameCore()
{
return "SearchBar";
}
protected override bool IsKeyboardFocusableCore()
{
return true;
}
public SearchBar SearchBar
{
get
{
return (SearchBar)base.Owner;
}
}
#region IValueProvider Members
public bool IsReadOnly
{
get
{
return this.SearchBar.SearchText.IsReadOnly;
}
}
public void SetValue(string value)
{
this.SearchBar.SearchText.Text = value;
}
public string Value
{
get
{
return this.SearchBar.SearchText.Text;
}
}
#endregion
測試代碼:
1.
public void TestMethod1()
{
Process process = System.Diagnostics.Process.GetProcessesByName("iexplore").First();
AutomationElement browserInstance = System.Windows.Automation.AutomationElement.FromHandle(process.MainWindowHandle);
TreeWalker tw = new TreeWalker(new PropertyCondition(AutomationElement.ClassNameProperty, "SearchBar"));
AutomationElement searchBar = tw.GetFirstChild(browserInstance);
myElement.SetFocus();
Thread.Sleep(1000);
searchBar.SetFocus();
Thread.Sleep(1000);
SendKeys.SendWait("Hello, world!");
}
2.
public void TestMethod1()
{
Process process = System.Diagnostics.Process.GetProcessesByName("iexplore").First();
AutomationElement myElement = System.Windows.Automation.AutomationElement.FromHandle(process.MainWindowHandle);
TreeWalker tw = new TreeWalker(new PropertyCondition(AutomationElement.ClassNameProperty, "SearchBar"));
AutomationElement searchBar = tw.GetFirstChild(myElement);
object valuePattern;
searchBar.TryGetCurrentPattern(ValuePattern.Pattern, out valuePattern);
((ValuePattern)valuePattern).SetValue("Hello, world!");
}
over.