[SourceEditor] Fixed diff tracker.

It's now underpinned with a test suite as well.

1 files changed, 112 insertions, 0 deletions

diff --git a/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/DiffTrackerTests.cs b/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/DiffTrackerTests.cs
new file mode 100644
index 0000000000..4cc2648f66
--- /dev/null
+++ b/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/DiffTrackerTests.cs
@@ -0,0 +1,112 @@
+//
+// DiffTrackerTests.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using System.Linq;
+using Mono.TextEditor.Utils;
+using System.Text;
+
+namespace Mono.TextEditor.Tests
+{
+	[TestFixture]
+	public class DiffTrackerTests
+	{
+		static TextDocument GetDocument ()
+		{
+			TextDocument doc = new TextDocument ();
+			StringBuilder sb = new StringBuilder ();
+			for (int i = 0; i < 10; i++)
+				sb.AppendLine ("1234567890");
+			doc.Text = sb.ToString ();
+			doc.DiffTracker.SetBaseDocument (doc.CreateDocumentSnapshot ());
+
+			return doc;
+		}
+
+		[Test]
+		public void TestInsertChanged ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.InsertText (doc.GetLine (5).Offset, "Hello");
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+		}
+
+		[Test]
+		public void TestRemoveChanged ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.RemoveText (doc.GetLine (5).Offset, 1);
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+		}
+
+		[Test]
+		public void TestInsertLine ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.InsertText (doc.GetLine (5).Offset, "Hello\n");
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+		}
+
+		[Test]
+		public void TestRemoveLine ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.RemoveText (doc.GetLine (5).Offset, doc.GetLine (5).LengthIncludingDelimiter);
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+		}
+
+		[Test]
+		public void TestLowerLineChangeOnInsert ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.InsertText (doc.GetLine (7).Offset, "Hello\n");
+			doc.InsertText (doc.GetLine (5).Offset, "Hello\n");
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (7)));
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (8)));
+		}
+
+
+		[Test]
+		public void TestLowerLineChangeOnRemove ()
+		{
+			var doc = GetDocument ();
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			doc.InsertText (doc.GetLine (7).Offset, "Hello\n");
+			doc.RemoveText (doc.GetLine (5).Offset, doc.GetLine (5).LengthIncludingDelimiter);
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (5)));
+			Assert.AreEqual (TextDocument.LineState.Unchanged, doc.DiffTracker.GetLineState (doc.GetLine (7)));
+			Assert.AreEqual (TextDocument.LineState.Dirty, doc.DiffTracker.GetLineState (doc.GetLine (6)));
+		}
+
+	}
+}