Add unit test that verifies that all AddIns shipping with SharpDevelop are addInManagerHidden="preinstalled"

samples/PortSD4AddInToSD5/PortSD4AddInToSD5.addin

@@ -3,6 +3,10 @@
        description = "Issue Providers that help porting SD4 AddIns to SD5"
        addInManagerHidden="preinstalled">
 	
+	<Manifest>
+		<Identity name = "PortSD4AddInToSD5" version = "@SharpDevelopCoreVersion"/>
+	</Manifest>
+	
 	<Runtime>
 		<Import assembly = "PortSD4AddInToSD5.dll"/>
 	</Runtime>

src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj

@@ -122,6 +122,7 @@
     <Compile Include="ServiceReferences\ServiceReferenceNodeTests.cs" />
     <Compile Include="ServiceReferences\ServiceReferencesFolderNodeTests.cs" />
     <Compile Include="ServiceReferences\ServiceReferencesProjectItemTests.cs" />
+    <Compile Include="SharpDevelopAddInTests.cs" />
     <Compile Include="StringTagProvider\MockProjectForTagProvider.cs" />
     <Compile Include="StringTagProvider\NullProjectStringTagProviderTestFixture.cs" />
     <Compile Include="StringTagProvider\ProjectTagsTestFixture.cs" />

src/Main/Base/Test/SharpDevelopAddInTests.cs

@@ -0,0 +1,59 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Xml.Linq;
+using System.Linq;
+using ICSharpCode.Core;
+using NUnit.Framework;
+
+namespace ICSharpCode.SharpDevelop
+{
+	[TestFixture]
+	public class SharpDevelopAddInTests
+	{
+		List<XDocument> addInFiles;
+		
+		[TestFixtureSetUp]
+		public void SetUp()
+		{
+			string dir = @"..\..\AddIns";
+			addInFiles = new List<XDocument>();
+			foreach (string file in Directory.GetFiles(dir, "*.addin", SearchOption.AllDirectories)) {
+				XDocument doc = XDocument.Load(file);
+				doc.AddAnnotation(FileName.Create(file));
+				addInFiles.Add(doc);
+			}
+		}
+		
+		[Test]
+		public void FoundMainAddIn()
+		{
+			Assert.IsTrue(addInFiles.Any(addIn => addIn.Annotation<FileName>().GetFileName() == "ICSharpCode.SharpDevelop.addin"));
+		}
+		
+		[Test]
+		public void IsPreinstalled()
+		{
+			foreach (var addIn in addInFiles) {
+				if (addIn.Annotation<FileName>().GetFileName() == "ICSharpCode.SharpDevelop.addin") {
+					Assert.AreEqual("true", (string)addIn.Root.Attribute("addInManagerHidden"));
+				} else {
+					Assert.AreEqual("preinstalled", (string)addIn.Root.Attribute("addInManagerHidden"));
+				}
+			}
+		}
+		
+		[Test]
+		public void HaveIdentity()
+		{
+			foreach (var addIn in addInFiles) {
+				var manifest = addIn.Root.Element("Manifest");
+				Assert.IsNotNull(manifest, "<Manifest> missing in " + addIn.Annotation<FileName>());
+				Assert.IsNotNull(manifest.Element("Identity"), "<Identity> missing in " + addIn.Annotation<FileName>());
+			}
+		}
+	}
+}