Stub out another Atk test

src/Gir.Tests/Gtk2/Atk/AtkTests.cs

@@ -164,6 +164,26 @@ public static void NativeCallback (Object obj)
 		}
 	}
 }
+", result);
+		}
+
+		[Test]
+		public void GenerateAttribute ()
+		{
+			var result = GenerateType (Gtk2Atk1, "Attribute", true);
+
+			Assert.AreEqual (@"using System;
+using System.Runtime.InteropServices;
+
+namespace Atk
+{
+	[StructLayout (LayoutKind.Sequential)]
+	public struct Attribute
+	{
+		string Name;
+		string Value;
+	}
+}
 ", result);
 		}
 	}