Added test showing presence of SharpZipLib bug.

Part of GH KSP-CKAN#221.

CKAN/Tests/Tests.csproj

@@ -56,6 +56,7 @@
     <Compile Include="NetKAN\KSMod.cs" />
     <Compile Include="NetKAN\GitHubTests.cs" />
     <Compile Include="CKAN\ModuleInstallDescriptor.cs" />
+    <Compile Include="ZipLib.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

CKAN/Tests/ZipLib.cs

@@ -0,0 +1,32 @@
+using NUnit.Framework;
+using ICSharpCode.SharpZipLib.Zip;
+using System.IO;
+using System;
+
+namespace Tests
+{
+    [TestFixture()]
+    public class ZipLib
+    {
+        [Test()]
+        public void GH221()
+        {
+            // This is a perfectly fine file, written by 'file-roller', but
+            // SharpZipLib can choke on it because it's not properly handling
+            // the headers properly. See GH #221.
+            string file = Path.Combine(TestData.DataDir(), "gh221.zip");
+
+            var zipfile = new ZipFile(file);
+
+            var entry = zipfile.GetEntry("221.txt");
+
+            string version = string.Format("{0}", entry.Version);
+
+            Assert.DoesNotThrow(delegate
+            {
+                zipfile.GetInputStream(entry);
+            }, "zip-entry format {0} (788 is our bug)", version);
+        }
+    }
+}
+