From 5eca6cc83e3cbb9cbef2e5b0c48959eee32e78b7 Mon Sep 17 00:00:00 2001
From: Kaktusbot <Kaktusbot@users.noreply.github.com>
Date: Tue, 10 May 2022 22:57:55 +0400
Subject: [PATCH] Add test to AvaloniaList.AddRange to notify Count property
 changed

---
 .../Collections/AvaloniaListTests.cs            | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tests/Avalonia.Base.UnitTests/Collections/AvaloniaListTests.cs b/tests/Avalonia.Base.UnitTests/Collections/AvaloniaListTests.cs
index f5ae4cc1e0..b59f272b0c 100644
--- a/tests/Avalonia.Base.UnitTests/Collections/AvaloniaListTests.cs
+++ b/tests/Avalonia.Base.UnitTests/Collections/AvaloniaListTests.cs
@@ -146,6 +146,23 @@ namespace Avalonia.Base.UnitTests.Collections
             Assert.True(raised);
         }
 
+        [Fact]
+        public void AddRange_IEnumerable_Should_Raise_Count_PropertyChanged()
+        {
+            var target = new AvaloniaList<int>(new[] { 1, 2, 3, 4, 5 });
+            var raised = false;
+
+            target.PropertyChanged += (s, e) => {
+                Assert.Equal(e.PropertyName, nameof(target.Count));
+                Assert.Equal(target.Count, 7);
+                raised = true;
+            };
+
+            target.AddRange(Enumerable.Range(6, 2));
+
+            Assert.True(raised);
+        }
+
         [Fact]
         public void AddRange_Items_Should_Raise_Correct_CollectionChanged()
         {