diff --git a/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj b/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
index 843b496e67..53d802f358 100644
--- a/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
+++ b/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
@@ -75,6 +75,7 @@
     <Compile Include="OverridableMethodsTestFixture.cs" />
     <Compile Include="OverridablePropertiesTestFixture.cs" />
     <Compile Include="PropertyPadSortingTests.cs" />
+    <Compile Include="ReadOnlyDocumentTests.cs" />
     <Compile Include="ReflectionLayerTests.cs" />
     <Compile Include="GenericResolverTests.cs" />
     <Compile Include="InnerClassesResolverTests.cs" />
diff --git a/src/Main/Base/Test/ReadOnlyDocumentTests.cs b/src/Main/Base/Test/ReadOnlyDocumentTests.cs
new file mode 100644
index 0000000000..810b8d9f1e
--- /dev/null
+++ b/src/Main/Base/Test/ReadOnlyDocumentTests.cs
@@ -0,0 +1,66 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <author name="Daniel Grunwald"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using ICSharpCode.NRefactory;
+using ICSharpCode.SharpDevelop.Editor;
+using NUnit.Framework;
+
+namespace ICSharpCode.SharpDevelop.Tests
+{
+	[TestFixture]
+	public class ReadOnlyDocumentTests
+	{
+		[Test]
+		public void EmptyReadOnlyDocument()
+		{
+			IDocument document = DocumentUtilitites.LoadReadOnlyDocumentFromBuffer(new StringTextBuffer(string.Empty));
+			Assert.AreEqual(string.Empty, document.Text);
+			Assert.AreEqual(0, document.TextLength);
+			Assert.AreEqual(1, document.TotalNumberOfLines);
+			Assert.AreEqual(0, document.PositionToOffset(1, 1));
+			Assert.AreEqual(new Location(1, 1), document.OffsetToPosition(0));
+			
+			Assert.AreEqual(0, document.GetLine(1).Offset);
+			Assert.AreEqual(0, document.GetLine(1).EndOffset);
+			Assert.AreEqual(0, document.GetLine(1).Length);
+			Assert.AreEqual(0, document.GetLine(1).TotalLength);
+			Assert.AreEqual(0, document.GetLine(1).DelimiterLength);
+			Assert.AreEqual(1, document.GetLine(1).LineNumber);
+		}
+		
+		[Test]
+		public void SimpleDocument()
+		{
+			string text = "Hello\nWorld!\r\n";
+			IDocument document = DocumentUtilitites.LoadReadOnlyDocumentFromBuffer(new StringTextBuffer(text));
+			Assert.AreEqual(text, document.Text);
+			Assert.AreEqual(3, document.TotalNumberOfLines);
+			
+			Assert.AreEqual(0, document.GetLine(1).Offset);
+			Assert.AreEqual(5, document.GetLine(1).EndOffset);
+			Assert.AreEqual(5, document.GetLine(1).Length);
+			Assert.AreEqual(6, document.GetLine(1).TotalLength);
+			Assert.AreEqual(1, document.GetLine(1).DelimiterLength);
+			Assert.AreEqual(1, document.GetLine(1).LineNumber);
+			
+			Assert.AreEqual(6, document.GetLine(2).Offset);
+			Assert.AreEqual(12, document.GetLine(2).EndOffset);
+			Assert.AreEqual(6, document.GetLine(2).Length);
+			Assert.AreEqual(8, document.GetLine(2).TotalLength);
+			Assert.AreEqual(2, document.GetLine(2).DelimiterLength);
+			Assert.AreEqual(2, document.GetLine(2).LineNumber);
+
+			Assert.AreEqual(14, document.GetLine(3).Offset);
+			Assert.AreEqual(14, document.GetLine(3).EndOffset);
+			Assert.AreEqual(0, document.GetLine(3).Length);
+			Assert.AreEqual(0, document.GetLine(3).TotalLength);
+			Assert.AreEqual(0, document.GetLine(3).DelimiterLength);
+			Assert.AreEqual(3, document.GetLine(3).LineNumber);
+		}
+	}
+}