From b447d6726720b4221318adeeae20755af9e6f9f7 Mon Sep 17 00:00:00 2001
From: Metalrom <romain.magny@gmail.com>
Date: Tue, 11 Dec 2012 11:17:53 +0100
Subject: [PATCH] Ensure Diff.Compare() cannot apply on a bare repository

---
 LibGit2Sharp.Tests/DiffTreeToTargetFixture.cs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/LibGit2Sharp.Tests/DiffTreeToTargetFixture.cs b/LibGit2Sharp.Tests/DiffTreeToTargetFixture.cs
index 4ef396d4e..7415b48b7 100644
--- a/LibGit2Sharp.Tests/DiffTreeToTargetFixture.cs
+++ b/LibGit2Sharp.Tests/DiffTreeToTargetFixture.cs
@@ -321,5 +321,19 @@ public void CanCopeWithEndOfFileNewlineChanges()
                 Assert.Equal(expected.ToString(), changes.Patch);
             }
         }
+
+        [Fact]
+        public void CompareATreeInABareRepositoryShouldRaiseException()
+        {
+            using (var repo = new Repository(BareTestRepoPath))
+            {
+                Assert.Throws<BareRepositoryException>(
+                    () => repo.Diff.Compare(repo.Head.Tip.Tree, DiffTargets.WorkingDirectory));
+                Assert.Throws<BareRepositoryException>(
+                    () => repo.Diff.Compare(repo.Head.Tip.Tree, DiffTargets.Index));
+                Assert.Throws<BareRepositoryException>(
+                    () => repo.Diff.Compare(repo.Head.Tip.Tree, DiffTargets.WorkingDirectory|DiffTargets.Index));
+            }
+        }
     }
 }