From 6f02e832f8a57624bb80aca6e27666000e64080f Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@users.noreply.github.com>
Date: Wed, 16 Jan 2019 04:54:05 +0100
Subject: [PATCH] Added failing test for buggy TreeViewItem expander.

A selector of type `Control /template/ Control:class` is returning `AlwaysThisInstance` instead of `Sometimes`.
---
 .../SelectorTests_Multiple.cs                 | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tests/Avalonia.Styling.UnitTests/SelectorTests_Multiple.cs b/tests/Avalonia.Styling.UnitTests/SelectorTests_Multiple.cs
index 04b29376b0..ba9b443d92 100644
--- a/tests/Avalonia.Styling.UnitTests/SelectorTests_Multiple.cs
+++ b/tests/Avalonia.Styling.UnitTests/SelectorTests_Multiple.cs
@@ -85,6 +85,44 @@ namespace Avalonia.Styling.UnitTests
             Assert.Equal(SelectorMatchResult.NeverThisType, match.Result);
         }
 
+        [Fact]
+        public void Named_Class_Template_Child_Of_Control()
+        {
+            var template = new FuncControlTemplate(parent =>
+            {
+                return new Border
+                {
+                    Name = "border",
+                };
+            });
+
+            var control = new Button
+            {
+                Template = template,
+            };
+
+            control.ApplyTemplate();
+
+            var selector = default(Selector)
+                .OfType<Button>()
+                .Template()
+                .Name("border")
+                .Class("foo");
+
+            var border = (Border)((IVisual)control).VisualChildren.Single();
+            var values = new List<bool>();
+            var match = selector.Match(border);
+
+            Assert.Equal(SelectorMatchResult.Sometimes, match.Result);
+            match.Activator.Subscribe(x => values.Add(x));
+
+            Assert.Equal(new[] { false }, values);
+            border.Classes.AddRange(new[] { "foo" });
+            Assert.Equal(new[] { false, true }, values);
+            border.Classes.Remove("foo");
+            Assert.Equal(new[] { false, true, false }, values);
+        }
+
         [Fact]
         public void TargetType_OfType()
         {