From 259529fbcde9307680c86bc0e8b984b4c3ccfe56 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Tue, 23 Jun 2020 16:57:41 +0200
Subject: [PATCH] Added unit test for not laying out invisible toplevel.

---
 .../LayoutManagerTests.cs                        | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs b/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
index 392227d5fe..e429adce85 100644
--- a/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
+++ b/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
@@ -23,6 +23,22 @@ namespace Avalonia.Layout.UnitTests
             Assert.True(control.Arranged);
         }
 
+        [Fact]
+        public void Doesnt_Measure_And_Arrange_InvalidateMeasured_Control_When_TopLevel_Is_Not_Visible()
+        {
+            var control = new LayoutTestControl();
+            var root = new LayoutTestRoot { Child = control, IsVisible = false };
+
+            root.LayoutManager.ExecuteInitialLayoutPass();
+            control.Measured = control.Arranged = false;
+
+            control.InvalidateMeasure();
+            root.LayoutManager.ExecuteLayoutPass();
+
+            Assert.False(control.Measured);
+            Assert.False(control.Arranged);
+        }
+
         [Fact]
         public void Arranges_InvalidateArranged_Control()
         {