fix tests

src/Avalonia.Base/Input/MouseDevice.cs

@@ -7,7 +7,7 @@ using Avalonia.Metadata;
 using Avalonia.Platform;
 using Avalonia.Utilities;
 using Avalonia.VisualTree;
-
+using Avalonia.Input.GestureRecognizers;
 #pragma warning disable CS0618
 
 namespace Avalonia.Input
@@ -163,8 +163,8 @@ namespace Avalonia.Input
             device = device ?? throw new ArgumentNullException(nameof(device));
             root = root ?? throw new ArgumentNullException(nameof(root));
 
-            IInputElement source;
+            IInputElement? source;
-            if (_pointer.CapturedGestureRecognizer is { } gestureRecognizer)
+            if (_pointer.CapturedGestureRecognizer is IGestureRecognizer gestureRecognizer)
             {
                 source = gestureRecognizer.Target ?? hitTest;
 
@@ -199,8 +199,8 @@ namespace Avalonia.Input
             device = device ?? throw new ArgumentNullException(nameof(device));
             root = root ?? throw new ArgumentNullException(nameof(root));
 
-            IInputElement source;
+            IInputElement? source;
-            if (_pointer.CapturedGestureRecognizer is { } gestureRecognizer)
+            if (_pointer.CapturedGestureRecognizer is IGestureRecognizer gestureRecognizer)
             {
                 source = gestureRecognizer.Target ?? hitTest;
 

src/Avalonia.Base/Input/PenDevice.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
+using Avalonia.Input.GestureRecognizers;
 using Avalonia.Input.Raw;
 using Avalonia.Interactivity;
 using Avalonia.Metadata;
@@ -114,8 +115,8 @@ namespace Avalonia.Input
             KeyModifiers inputModifiers, IInputElement? hitTest,
             Lazy<IReadOnlyList<RawPointerPoint>?>? intermediatePoints)
         {
-            IInputElement source;
+            IInputElement? source;
-            if (pointer.CapturedGestureRecognizer is { } gestureRecognizer)
+            if (pointer.CapturedGestureRecognizer is IGestureRecognizer gestureRecognizer)
             {
                 source = gestureRecognizer.Target ?? hitTest;
 
@@ -147,8 +148,8 @@ namespace Avalonia.Input
             IInputElement root, Point p, PointerPointProperties properties,
             KeyModifiers inputModifiers, IInputElement? hitTest)
         {
-            IInputElement source;
+            IInputElement? source;
-            if (pointer.CapturedGestureRecognizer is { } gestureRecognizer)
+            if (pointer.CapturedGestureRecognizer is IGestureRecognizer gestureRecognizer)
             {
                 source = gestureRecognizer.Target ?? hitTest;
 

src/Avalonia.Base/Input/TouchDevice.cs

@@ -117,15 +117,15 @@ namespace Avalonia.Input
                 _pointers.Remove(args.RawPointerId);
                 using (pointer)
                 {
-                    pointer.Capture(null);
+                    pointer?.Capture(null);
-                    pointer.CaptureGestureRecognizer(null);
+                    pointer?.CaptureGestureRecognizer(null);
                 }
             }
 
             if (args.Type == RawPointerEventType.TouchUpdate)
             {
                 target = gestureTarget ?? target;
-                var e = new PointerEventArgs(InputElement.PointerMovedEvent, target, pointer, (Visual)args.Root,
+                var e = new PointerEventArgs(InputElement.PointerMovedEvent, target, pointer!, (Visual)args.Root,
                     args.Position, ev.Timestamp,
                     new PointerPointProperties(GetModifiers(args.InputModifiers, true), updateKind),
                     keyModifier, args.IntermediatePoints);

tests/Avalonia.UnitTests/TouchTestHelper.cs

@@ -27,8 +27,13 @@ namespace Avalonia.UnitTests
 
         public void Move(Interactive target, Interactive source, in Point position, KeyModifiers modifiers = default)
         {
-            target.RaiseEvent(new PointerEventArgs(InputElement.PointerMovedEvent, source, _pointer, (Visual)target, position,
+            var e = new PointerEventArgs(InputElement.PointerMovedEvent, source, _pointer, (Visual)target, position,
-                Timestamp(), PointerPointProperties.None, modifiers));
+                Timestamp(), PointerPointProperties.None, modifiers);
+            if (_pointer.CapturedGestureRecognizer != null)
+                _pointer.CapturedGestureRecognizer.PointerMoved(e);
+            else
+                target.RaiseEvent(e);
+
         }
 
         public void Up(Interactive target, Point position = default, KeyModifiers modifiers = default)
@@ -36,9 +41,16 @@ namespace Avalonia.UnitTests
 
         public void Up(Interactive target, Interactive source, Point position = default, KeyModifiers modifiers = default)
         {
-            source.RaiseEvent(new PointerReleasedEventArgs(source, _pointer, (Visual)target, position, Timestamp(), PointerPointProperties.None,
+            var e = new PointerReleasedEventArgs(source, _pointer, (Visual)target, position, Timestamp(), PointerPointProperties.None,
-                modifiers, MouseButton.None));
+                modifiers, MouseButton.None);
+
+            if (_pointer.CapturedGestureRecognizer != null)
+                _pointer.CapturedGestureRecognizer.PointerReleased(e);
+            else
+                source.RaiseEvent(e);
+
             _pointer.Capture(null);
+            _pointer.CaptureGestureRecognizer(null);
         }
 
         public void Tap(Interactive target, Point position = default,  KeyModifiers modifiers = default)