添加项目文件。

Fluent.Ribbon/Fluent.Ribbon.Tests/Controls/InRibbonGalleryTests.cs

@@ -0,0 +1,24 @@
+namespace Fluent.Tests.Controls
+{
+    using Fluent.Tests.TestClasses;
+    using NUnit.Framework;
+
+    [TestFixture]
+    public class InRibbonGalleryTests
+    {
+        [Test]
+        public void Opening_DropDown_Should_Not_Throw_When_GalleryPanel_Has_No_Width()
+        {
+            var control = new InRibbonGallery
+                          {
+                              Width = 10,
+                              Height = 30
+                          };
+
+            using (new TestRibbonWindow(control))
+            {
+                Assert.That(() => control.IsDropDownOpen = true, Throws.Nothing);
+            }
+        }
+    }
+}