Enforce repo.Diff.Compare<TreeChanges> test coverage

Author: nulltoken

LibGit2Sharp.Tests/DiffTreeToTreeFixture.cs

@@ -904,14 +904,13 @@ public void CanCompareTwoVersionsOfAFileWithADiffOfTwoHunks(int contextLines, in
             }
         }
 
-        [Fact]
-        public void CanHandleTwoTreeEntryChangesWithTheSamePath()
+        private void CanHandleTwoTreeEntryChangesWithTheSamePath(SimilarityOptions similarity, Action<string, TreeChanges> verifier)
         {
             string repoPath = InitNewRepository();
 
             using (var repo = new Repository(repoPath))
             {
-                Blob mainContent = OdbHelper.CreateBlob(repo, "awesome content\n");
+                Blob mainContent = OdbHelper.CreateBlob(repo, "awesome content\n" + new string('b', 4096));
                 Blob linkContent = OdbHelper.CreateBlob(repo, "../../objc/Nu.h");
 
                 string path = string.Format("include{0}Nu{0}Nu.h", Path.DirectorySeparatorChar);
@@ -930,45 +929,68 @@ public void CanHandleTwoTreeEntryChangesWithTheSamePath()
                 var changes = repo.Diff.Compare<TreeChanges>(treeOld, treeNew,
                     compareOptions: new CompareOptions
                     {
-                        Similarity = SimilarityOptions.None,
+                        Similarity = similarity,
                     });
+            }
+        }
 
-                /*
-                 * $ git diff-tree -p 5c87b67 d5278d0
-                 * diff --git a/include/Nu/Nu.h b/include/Nu/Nu.h
-                 * deleted file mode 120000
-                 * index 19bf568..0000000
-                 * --- a/include/Nu/Nu.h
-                 * +++ /dev/null
-                 * @@ -1 +0,0 @@
-                 * -../../objc/Nu.h
-                 * \ No newline at end of file
-                 * diff --git a/include/Nu/Nu.h b/include/Nu/Nu.h
-                 * new file mode 100644
-                 * index 0000000..f9e6561
-                 * --- /dev/null
-                 * +++ b/include/Nu/Nu.h
-                 * @@ -0,0 +1 @@
-                 * +awesome content
-                 * diff --git a/objc/Nu.h b/objc/Nu.h
-                 * deleted file mode 100644
-                 * index f9e6561..0000000
-                 * --- a/objc/Nu.h
-                 * +++ /dev/null
-                 * @@ -1 +0,0 @@
-                 * -awesome content
-                 */
+        [Fact]
+        public void CanHandleTwoTreeEntryChangesWithTheSamePathUsingSimilarityNone()
+        {
+            /*
+             * $ git diff-tree -p 5c87b67 d5278d0
+             * diff --git a/include/Nu/Nu.h b/include/Nu/Nu.h
+             * deleted file mode 120000
+             * index 19bf568..0000000
+             * --- a/include/Nu/Nu.h
+             * +++ /dev/null
+             * @@ -1 +0,0 @@
+             * -../../objc/Nu.h
+             * \ No newline at end of file
+             * diff --git a/include/Nu/Nu.h b/include/Nu/Nu.h
+             * new file mode 100644
+             * index 0000000..f9e6561
+             * --- /dev/null
+             * +++ b/include/Nu/Nu.h
+             * @@ -0,0 +1 @@
+             * +awesome content
+             * diff --git a/objc/Nu.h b/objc/Nu.h
+             * deleted file mode 100644
+             * index f9e6561..0000000
+             * --- a/objc/Nu.h
+             * +++ /dev/null
+             * @@ -1 +0,0 @@
+             * -awesome content
+             */
+
+            CanHandleTwoTreeEntryChangesWithTheSamePath(SimilarityOptions.None,
+                (path, changes) =>
+                {
+                    Assert.Equal(1, changes.Deleted.Count());
+                    Assert.Equal(0, changes.Modified.Count());
+                    Assert.Equal(1, changes.TypeChanged.Count());
+
+                    TreeEntryChanges change = changes[path];
+                    Assert.Equal(Mode.SymbolicLink, change.OldMode);
+                    Assert.Equal(Mode.NonExecutableFile, change.Mode);
+                    Assert.Equal(ChangeKind.TypeChanged, change.Status);
+                    Assert.Equal(path, change.Path);
+                });
+        }
 
-                Assert.Equal(1, changes.Deleted.Count());
-                Assert.Equal(0, changes.Modified.Count());
-                Assert.Equal(1, changes.TypeChanged.Count());
+        [Fact]
+        public void CanHandleTwoTreeEntryChangesWithTheSamePathUsingSimilarityDefault()
+        {
+            /*
+             * $ git diff-tree -p 5c87b67 d5278d0
+             * To be done...
+             */
 
-                TreeEntryChanges change = changes[path];
-                Assert.Equal(Mode.SymbolicLink, change.OldMode);
-                Assert.Equal(Mode.NonExecutableFile, change.Mode);
-                Assert.Equal(ChangeKind.TypeChanged, change.Status);
-                Assert.Equal(path, change.Path);
-            }
+            CanHandleTwoTreeEntryChangesWithTheSamePath(SimilarityOptions.Default,
+                (path, changes) =>
+                {
+                    // TODO: What should we assert there?
+                });
         }
 
         [Fact]