Filtering fails frequently and is very slow

[kentcb]

Hi,

Using the filtering box with my project (>700 tests) fails often (but not always) with:

System.ArgumentOutOfRangeException: Argument is out of range.
Parameter name: index
  at Xamarin.Forms.ListProxy.get_Item (Int32 index) [0x00000] in <filename unknown>:0
  at Xamarin.Forms.TemplatedItemsList`2[Xamarin.Forms.ItemsView`1[Xamarin.Forms.Cell],Xamarin.Forms.Cell].get_Item (Int32 index) [0x00000] in <filename unknown>:0
  at Xamarin.Forms.Platform.iOS.ListViewRenderer+ListViewDataSource.GetCellForPath (Foundation.NSIndexPath indexPath) [0x00000] in <filename unknown>:0
  at Xamarin.Forms.Platform.iOS.ListViewRenderer+ListViewDataSource.GetCell (UIKit.UITableView tableView, Foundation.NSIndexPath indexPath) [0x00000] in <filename unknown>:0
  at at (wrapper managed-to-native) ObjCRuntime.Messaging:void_objc_msgSend (intptr,intptr)
  at UIKit.UITableView.EndUpdates () [0x00010] in /Developer/MonoTouch/Source/monotouch/src/build/native/UIKit/UITableView.g.cs:279
  at Xamarin.Forms.Platform.iOS.ListViewRenderer.UpdateItems (System.Collections.Specialized.NotifyCollectionChangedEventArgs e, Int32 section, Boolean resetWhenGrouped) [0x00000] in <filename unknown>:0
  at Xamarin.Forms.Platform.iOS.ListViewRenderer+<>c__DisplayClass5.<OnCollectionChanged>b__4 () [0x00000] in <filename unknown>:0
  at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Developer/MonoTouch/Source/maccore/src/Foundation/NSAction.cs:164
  at at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
  at UIKit.UIApplication.Main (System.String[] args, IntPtr principal, IntPtr delegate) [0x00005] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:62
  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0001c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:45

Quite possibly a Xamarin Forms issue, but nonetheless it's blocking me from using the feature. It is also painfully slow, especially when typing the first few characters to filter on.

[clairernovotny]

Hi Kent,

Would you mind signing an Outercurve CLA for xUnit? If you could please send me your full name and email address, we can get the process started. Shouldn't take long.

I've already merged all of your PR's together locally and it looks good.

Thanks!

[kentcb]

@onovotny : sent you an email.

Cheers.