From 64e88961447cf3a4ab26fa273e8b6a9969314557 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Sun, 5 Mar 2017 20:41:48 +0100
Subject: [PATCH] Added Rect.Union empty tests.

---
 tests/Avalonia.Visuals.UnitTests/RectTests.cs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/Avalonia.Visuals.UnitTests/RectTests.cs b/tests/Avalonia.Visuals.UnitTests/RectTests.cs
index bd004eda19..6e3f654bfb 100644
--- a/tests/Avalonia.Visuals.UnitTests/RectTests.cs
+++ b/tests/Avalonia.Visuals.UnitTests/RectTests.cs
@@ -22,5 +22,21 @@ namespace Avalonia.Visuals.UnitTests
 
             Assert.Equal(new Rect(0, 0, 250, 250), result);
         }
+
+        [Fact]
+        public void Union_Should_Ignore_Empty_This_rect()
+        {
+            var result = new Rect(0, 0, 0, 0).Union(new Rect(150, 150, 100, 100));
+
+            Assert.Equal(new Rect(150, 150, 100, 100), result);
+        }
+
+        [Fact]
+        public void Union_Should_Ignore_Empty_Other_rect()
+        {
+            var result = new Rect(0, 0, 100, 100).Union(new Rect(150, 150, 0, 0));
+
+            Assert.Equal(new Rect(0, 0, 100, 100), result);
+        }
     }
 }