Drop TreeChanges path indexer

Fix #1004

Author: nulltoken

LibGit2Sharp.Tests/DiffTreeToTreeFixture.cs

@@ -39,7 +39,7 @@ public void RetrievingANonExistentFileChangeReturnsNull()
 
                 var changes = repo.Diff.Compare<TreeChanges>(tree, tree);
 
-                Assert.Null(changes["batman"]);
+                Assert.Equal(0, changes.Count(c => c.Path == "batman"));
             }
         }
 
@@ -62,7 +62,7 @@ public void CanCompareACommitTreeAgainstItsParent()
                 Assert.Equal(1, changes.Count());
                 Assert.Equal(1, changes.Added.Count());
 
-                TreeEntryChanges treeEntryChanges = changes["1.txt"];
+                TreeEntryChanges treeEntryChanges = changes.Single(c => c.Path == "1.txt");
 
                 var patch = repo.Diff.Compare<Patch>(parentCommitTree, commitTree);
                 Assert.False(patch["1.txt"].IsBinaryComparison);
@@ -272,8 +272,7 @@ public void DetectsTheRenamingOfAModifiedFileByDefault()
                 var changes = repo.Diff.Compare<TreeChanges>(rootCommitTree, commitTreeWithRenamedFile);
 
                 Assert.Equal(1, changes.Count());
-                Assert.Equal("super-file.txt", changes["super-file.txt"].Path);
-                Assert.Equal("my-name-does-not-feel-right.txt", changes["super-file.txt"].OldPath);
+                Assert.Equal("my-name-does-not-feel-right.txt", changes.Single(c => c.Path == "super-file.txt").OldPath);
                 Assert.Equal(1, changes.Renamed.Count());
             }
         }
@@ -888,7 +887,7 @@ public void CanCompareTwoVersionsOfAFileWithADiffOfTwoHunks(int contextLines, in
                 Assert.Equal(1, changes.Deleted.Count());
                 Assert.Equal(1, changes.Added.Count());
 
-                Assert.Equal(Mode.Nonexistent, changes["my-name-does-not-feel-right.txt"].Mode);
+                Assert.Equal(Mode.Nonexistent, changes.Single(c => c.Path =="my-name-does-not-feel-right.txt").Mode);
 
                 var patch = repo.Diff.Compare<Patch>(rootCommitTree, mergedCommitTree, compareOptions: compareOptions);
 
@@ -904,14 +903,13 @@ 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 +928,68 @@ 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.Single(c => c.Path== 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]
@@ -1104,8 +1125,8 @@ public void RetrievingDiffChangesMustAlwaysBeCaseSensitive()
             {
                 var changes = repo.Diff.Compare<TreeChanges>(repo.Lookup<Tree>(treeOldOid), repo.Lookup<Tree>(treeNewOid));
 
-                Assert.Equal(ChangeKind.Modified, changes["a.txt"].Status);
-                Assert.Equal(ChangeKind.Modified, changes["A.TXT"].Status);
+                Assert.Equal(ChangeKind.Modified, changes.Single(c => c.Path == "a.txt").Status);
+                Assert.Equal(ChangeKind.Modified, changes.Single(c => c.Path == "A.TXT").Status);
             }
         }
 

LibGit2Sharp/TreeChanges.cs

@@ -17,7 +17,7 @@ namespace LibGit2Sharp
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public class TreeChanges : IEnumerable<TreeEntryChanges>
     {
-        private readonly IDictionary<FilePath, TreeEntryChanges> changes = new Dictionary<FilePath, TreeEntryChanges>();
+        private readonly List<TreeEntryChanges> changes = new List<TreeEntryChanges>();
         private readonly List<TreeEntryChanges> added = new List<TreeEntryChanges>();
         private readonly List<TreeEntryChanges> deleted = new List<TreeEntryChanges>();
         private readonly List<TreeEntryChanges> modified = new List<TreeEntryChanges>();
@@ -64,7 +64,7 @@ private void AddFileChange(GitDiffDelta delta)
             var treeEntryChanges = new TreeEntryChanges(delta);
 
             fileDispatcher[treeEntryChanges.Status](this, treeEntryChanges);
-            changes.Add(treeEntryChanges.Path, treeEntryChanges);
+            changes.Add(treeEntryChanges);
         }
 
         #region IEnumerable<TreeEntryChanges> Members
@@ -75,7 +75,7 @@ private void AddFileChange(GitDiffDelta delta)
         /// <returns>An <see cref="IEnumerator{T}"/> object that can be used to iterate through the collection.</returns>
         public virtual IEnumerator<TreeEntryChanges> GetEnumerator()
         {
-            return changes.Values.GetEnumerator();
+            return changes.GetEnumerator();
         }
 
         /// <summary>
@@ -89,27 +89,6 @@ IEnumerator IEnumerable.GetEnumerator()
 
         #endregion
 
-        /// <summary>
-        /// Gets the <see cref="TreeEntryChanges"/> corresponding to the specified <paramref name="path"/>.
-        /// </summary>
-        public virtual TreeEntryChanges this[string path]
-        {
-            get { return this[(FilePath)path]; }
-        }
-
-        private TreeEntryChanges this[FilePath path]
-        {
-            get
-            {
-                TreeEntryChanges treeEntryChanges;
-                if (changes.TryGetValue(path, out treeEntryChanges))
-                {
-                    return treeEntryChanges;
-                }
-
-                return null;
-            }
-        }
 
         /// <summary>
         /// List of <see cref="TreeEntryChanges"/> that have been been added.