Fix unit tests.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@4776 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Adorners/AdornerProviderClasses.cs

@@ -15,7 +15,7 @@ namespace ICSharpCode.WpfDesign.Adorners
 	/// <summary>
 	/// An adorner extension that is attached permanently.
 	/// </summary>
-	[ExtensionServer(typeof(DefaultExtensionServer.Permanent))]
+	[ExtensionServer(typeof(DefaultExtensionServer.PermanentWithDesignPanel))]
 	public abstract class PermanentAdornerProvider : AdornerProvider
 	{
 		

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Extensions/DefaultExtension.cs

@@ -124,5 +124,15 @@ namespace ICSharpCode.WpfDesign.Extensions
 				return true;
 			}
 		}
+		
+		// special extension server like 'permanent' - skips applying extensions if there
+		// is no design panel (e.g. in designer unit tests).
+		internal sealed class PermanentWithDesignPanel : DefaultExtensionServer
+		{
+			public override bool ShouldApplyExtensions(DesignItem extendedItem)
+			{
+				return Services.GetService(typeof(IDesignPanel)) != null;
+			}
+		}
 	}
 }